1 | #include "EXTERN.h" |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
3 | #include "XSUB.h" |
4 | |
4 | |
5 | #include "assert.h" |
5 | #include <assert.h> |
6 | #include "string.h" |
6 | #include <string.h> |
7 | #include "stdlib.h" |
7 | #include <stdlib.h> |
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8 | #include <stdio.h> |
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9 | #include <limits.h> |
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10 | #include <float.h> |
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11 | #include <inttypes.h> |
8 | |
12 | |
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13 | #if defined(__BORLANDC__) || defined(_MSC_VER) |
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14 | # define snprintf _snprintf // C compilers have this in stdio.h |
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15 | #endif |
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16 | |
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17 | // some old perls do not have this, try to make it work, no |
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18 | // guarantees, though. if it breaks, you get to keep the pieces. |
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19 | #ifndef UTF8_MAXBYTES |
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20 | # define UTF8_MAXBYTES 13 |
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21 | #endif |
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22 | |
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23 | // compatibility with perl <5.18 |
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24 | #ifndef HvNAMELEN_get |
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25 | # define HvNAMELEN_get(hv) strlen (HvNAME (hv)) |
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26 | #endif |
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27 | #ifndef HvNAMELEN |
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28 | # define HvNAMELEN(hv) HvNAMELEN_get (hv) |
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29 | #endif |
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30 | #ifndef HvNAMEUTF8 |
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31 | # define HvNAMEUTF8(hv) 0 |
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32 | #endif |
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33 | |
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34 | // three extra for rounding, sign, and end of string |
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35 | #define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3) |
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36 | |
9 | #define F_ASCII 0x00000001 |
37 | #define F_ASCII 0x00000001UL |
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38 | #define F_LATIN1 0x00000002UL |
10 | #define F_UTF8 0x00000002 |
39 | #define F_UTF8 0x00000004UL |
11 | #define F_INDENT 0x00000004 |
40 | #define F_INDENT 0x00000008UL |
12 | #define F_CANONICAL 0x00000008 |
41 | #define F_CANONICAL 0x00000010UL |
13 | #define F_SPACE_BEFORE 0x00000010 |
42 | #define F_SPACE_BEFORE 0x00000020UL |
14 | #define F_SPACE_AFTER 0x00000020 |
43 | #define F_SPACE_AFTER 0x00000040UL |
15 | #define F_JSON_RPC 0x00000040 |
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16 | #define F_ALLOW_NONREF 0x00000080 |
44 | #define F_ALLOW_NONREF 0x00000100UL |
17 | #define F_SHRINK 0x00000100 |
45 | #define F_SHRINK 0x00000200UL |
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46 | #define F_ALLOW_BLESSED 0x00000400UL |
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47 | #define F_CONV_BLESSED 0x00000800UL |
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48 | #define F_RELAXED 0x00001000UL |
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49 | #define F_ALLOW_UNKNOWN 0x00002000UL |
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50 | #define F_ALLOW_TAGS 0x00004000UL |
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51 | #define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing |
18 | |
52 | |
19 | #define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
53 | #define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
20 | #define F_DEFAULT 0 |
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21 | |
54 | |
22 | #define INIT_SIZE 32 // initial scalar size to be allocated |
55 | #define INIT_SIZE 32 // initial scalar size to be allocated |
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56 | #define INDENT_STEP 3 // spaces per indentation level |
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57 | |
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58 | #define SHORT_STRING_LEN 16384 // special-case strings of up to this size |
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59 | |
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60 | #define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8) |
23 | |
61 | |
24 | #define SB do { |
62 | #define SB do { |
25 | #define SE } while (0) |
63 | #define SE } while (0) |
26 | |
64 | |
27 | static HV *json_stash; |
65 | #if __GNUC__ >= 3 |
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66 | # define expect(expr,value) __builtin_expect ((expr), (value)) |
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67 | # define INLINE static inline |
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68 | #else |
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69 | # define expect(expr,value) (expr) |
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70 | # define INLINE static |
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71 | #endif |
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72 | |
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73 | #define expect_false(expr) expect ((expr) != 0, 0) |
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74 | #define expect_true(expr) expect ((expr) != 0, 1) |
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75 | |
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76 | #define IN_RANGE_INC(type,val,beg,end) \ |
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77 | ((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \ |
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78 | <= (unsigned type)((unsigned type)(end) - (unsigned type)(beg))) |
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79 | |
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80 | #define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)" |
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81 | |
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82 | #ifdef USE_ITHREADS |
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83 | # define JSON_SLOW 1 |
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84 | # define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1)) |
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85 | # define BOOL_STASH (bool_stash ? bool_stash : gv_stashpv ("Types::Serialiser::Boolean", 1)) |
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86 | #else |
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87 | # define JSON_SLOW 0 |
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88 | # define JSON_STASH json_stash |
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89 | # define BOOL_STASH bool_stash |
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90 | #endif |
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91 | |
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92 | // the amount of HEs to allocate on the stack, when sorting keys |
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93 | #define STACK_HES 64 |
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94 | |
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95 | static HV *json_stash, *bool_stash; // JSON::XS::, Types::Serialiser::Boolean:: |
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96 | static SV *bool_true, *bool_false, *sv_json; |
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97 | |
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98 | enum { |
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99 | INCR_M_WS = 0, // initial whitespace skipping, must be 0 |
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100 | INCR_M_STR, // inside string |
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101 | INCR_M_BS, // inside backslash |
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102 | INCR_M_C0, // inside comment in initial whitespace sequence |
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103 | INCR_M_C1, // inside comment in other places |
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104 | INCR_M_JSON // outside anything, count nesting |
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105 | }; |
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106 | |
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107 | #define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON) |
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108 | |
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109 | typedef struct { |
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110 | U32 flags; |
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111 | U32 max_depth; |
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112 | STRLEN max_size; |
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113 | |
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114 | SV *cb_object; |
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115 | HV *cb_sk_object; |
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116 | |
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117 | // for the incremental parser |
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118 | SV *incr_text; // the source text so far |
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119 | STRLEN incr_pos; // the current offset into the text |
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120 | int incr_nest; // {[]}-nesting level |
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121 | unsigned char incr_mode; |
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122 | } JSON; |
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123 | |
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124 | INLINE void |
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125 | json_init (JSON *json) |
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126 | { |
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127 | Zero (json, 1, JSON); |
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128 | json->max_depth = 512; |
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129 | } |
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130 | |
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131 | ///////////////////////////////////////////////////////////////////////////// |
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132 | // utility functions |
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133 | |
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134 | INLINE SV * |
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135 | get_bool (const char *name) |
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136 | { |
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137 | SV *sv = get_sv (name, 1); |
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138 | |
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139 | SvREADONLY_on (sv); |
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140 | SvREADONLY_on (SvRV (sv)); |
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141 | |
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142 | return sv; |
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143 | } |
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144 | |
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145 | INLINE void |
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146 | shrink (SV *sv) |
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147 | { |
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148 | sv_utf8_downgrade (sv, 1); |
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149 | |
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150 | if (SvLEN (sv) > SvCUR (sv) + 1) |
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151 | { |
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152 | #ifdef SvPV_shrink_to_cur |
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153 | SvPV_shrink_to_cur (sv); |
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154 | #elif defined (SvPV_renew) |
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155 | SvPV_renew (sv, SvCUR (sv) + 1); |
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156 | #endif |
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157 | } |
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158 | } |
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159 | |
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160 | // decode an utf-8 character and return it, or (UV)-1 in |
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161 | // case of an error. |
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162 | // we special-case "safe" characters from U+80 .. U+7FF, |
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163 | // but use the very good perl function to parse anything else. |
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164 | // note that we never call this function for a ascii codepoints |
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165 | INLINE UV |
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166 | decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) |
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167 | { |
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168 | if (expect_true (len >= 2 |
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169 | && IN_RANGE_INC (char, s[0], 0xc2, 0xdf) |
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170 | && IN_RANGE_INC (char, s[1], 0x80, 0xbf))) |
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171 | { |
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172 | *clen = 2; |
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173 | return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
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174 | } |
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175 | else |
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176 | return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); |
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177 | } |
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178 | |
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179 | // likewise for encoding, also never called for ascii codepoints |
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180 | // this function takes advantage of this fact, although current gccs |
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181 | // seem to optimise the check for >= 0x80 away anyways |
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182 | INLINE unsigned char * |
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183 | encode_utf8 (unsigned char *s, UV ch) |
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184 | { |
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185 | if (expect_false (ch < 0x000080)) |
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186 | *s++ = ch; |
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187 | else if (expect_true (ch < 0x000800)) |
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188 | *s++ = 0xc0 | ( ch >> 6), |
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189 | *s++ = 0x80 | ( ch & 0x3f); |
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190 | else if ( ch < 0x010000) |
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191 | *s++ = 0xe0 | ( ch >> 12), |
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192 | *s++ = 0x80 | ((ch >> 6) & 0x3f), |
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193 | *s++ = 0x80 | ( ch & 0x3f); |
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194 | else if ( ch < 0x110000) |
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195 | *s++ = 0xf0 | ( ch >> 18), |
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196 | *s++ = 0x80 | ((ch >> 12) & 0x3f), |
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197 | *s++ = 0x80 | ((ch >> 6) & 0x3f), |
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198 | *s++ = 0x80 | ( ch & 0x3f); |
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199 | |
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200 | return s; |
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201 | } |
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202 | |
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203 | // convert offset pointer to character index, sv must be string |
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204 | static STRLEN |
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205 | ptr_to_index (SV *sv, char *offset) |
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206 | { |
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207 | return SvUTF8 (sv) |
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208 | ? utf8_distance (offset, SvPVX (sv)) |
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209 | : offset - SvPVX (sv); |
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210 | } |
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211 | |
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212 | ///////////////////////////////////////////////////////////////////////////// |
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213 | // fp hell |
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214 | |
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215 | // scan a group of digits, and a trailing exponent |
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216 | static void |
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217 | json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth) |
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218 | { |
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219 | UV uaccum = 0; |
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220 | int eaccum = 0; |
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221 | |
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222 | // if we recurse too deep, skip all remaining digits |
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223 | // to avoid a stack overflow attack |
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224 | if (expect_false (--maxdepth <= 0)) |
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225 | while (((U8)*s - '0') < 10) |
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226 | ++s; |
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227 | |
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228 | for (;;) |
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229 | { |
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230 | U8 dig = (U8)*s - '0'; |
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231 | |
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232 | if (expect_false (dig >= 10)) |
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233 | { |
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234 | if (dig == (U8)((U8)'.' - (U8)'0')) |
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235 | { |
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236 | ++s; |
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237 | json_atof_scan1 (s, accum, expo, 1, maxdepth); |
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238 | } |
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239 | else if ((dig | ' ') == 'e' - '0') |
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240 | { |
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241 | int exp2 = 0; |
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242 | int neg = 0; |
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243 | |
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244 | ++s; |
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245 | |
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246 | if (*s == '-') |
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247 | { |
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248 | ++s; |
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249 | neg = 1; |
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250 | } |
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251 | else if (*s == '+') |
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252 | ++s; |
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253 | |
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254 | while ((dig = (U8)*s - '0') < 10) |
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255 | exp2 = exp2 * 10 + *s++ - '0'; |
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256 | |
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257 | *expo += neg ? -exp2 : exp2; |
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258 | } |
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259 | |
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260 | break; |
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261 | } |
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262 | |
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263 | ++s; |
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264 | |
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265 | uaccum = uaccum * 10 + dig; |
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266 | ++eaccum; |
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267 | |
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268 | // if we have too many digits, then recurse for more |
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269 | // we actually do this for rather few digits |
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270 | if (uaccum >= (UV_MAX - 9) / 10) |
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271 | { |
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272 | if (postdp) *expo -= eaccum; |
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273 | json_atof_scan1 (s, accum, expo, postdp, maxdepth); |
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274 | if (postdp) *expo += eaccum; |
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275 | |
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276 | break; |
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277 | } |
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278 | } |
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279 | |
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280 | // this relies greatly on the quality of the pow () |
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281 | // implementation of the platform, but a good |
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282 | // implementation is hard to beat. |
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283 | // (IEEE 754 conformant ones are required to be exact) |
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284 | if (postdp) *expo -= eaccum; |
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285 | *accum += uaccum * Perl_pow (10., *expo); |
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286 | *expo += eaccum; |
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287 | } |
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288 | |
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289 | static NV |
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290 | json_atof (const char *s) |
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291 | { |
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292 | NV accum = 0.; |
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293 | int expo = 0; |
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294 | int neg = 0; |
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295 | |
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296 | if (*s == '-') |
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297 | { |
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298 | ++s; |
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299 | neg = 1; |
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300 | } |
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301 | |
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302 | // a recursion depth of ten gives us >>500 bits |
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303 | json_atof_scan1 (s, &accum, &expo, 0, 10); |
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304 | |
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305 | return neg ? -accum : accum; |
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306 | } |
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307 | |
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308 | // target of scalar reference is bool? -1 == nope, 0 == false, 1 == true |
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309 | static int |
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310 | ref_bool_type (SV *sv) |
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311 | { |
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312 | svtype svt = SvTYPE (sv); |
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313 | |
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314 | if (svt < SVt_PVAV) |
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315 | { |
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316 | STRLEN len = 0; |
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317 | char *pv = svt ? SvPV (sv, len) : 0; |
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318 | |
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319 | if (len == 1) |
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320 | if (*pv == '1') |
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321 | return 1; |
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322 | else if (*pv == '0') |
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323 | return 0; |
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324 | } |
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325 | |
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326 | return -1; |
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327 | } |
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328 | |
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329 | // returns whether scalar is not a reference in the sense of allow_nonref |
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330 | static int |
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331 | json_nonref (SV *scalar) |
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332 | { |
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333 | if (!SvROK (scalar)) |
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334 | return 1; |
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335 | |
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336 | scalar = SvRV (scalar); |
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337 | |
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338 | if (SvTYPE (scalar) >= SVt_PVMG) |
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339 | { |
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340 | if (SvSTASH (scalar) == bool_stash) |
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341 | return 1; |
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342 | |
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343 | if (!SvOBJECT (scalar) && ref_bool_type (scalar) >= 0) |
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344 | return 1; |
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345 | } |
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346 | |
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347 | return 0; |
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348 | } |
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349 | |
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350 | ///////////////////////////////////////////////////////////////////////////// |
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351 | // encoder |
28 | |
352 | |
29 | // structure used for encoding JSON |
353 | // structure used for encoding JSON |
30 | typedef struct |
354 | typedef struct |
31 | { |
355 | { |
32 | char *cur; |
356 | char *cur; // SvPVX (sv) + current output position |
33 | STRLEN len; // SvLEN (sv) |
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34 | char *end; // SvEND (sv) |
357 | char *end; // SvEND (sv) |
35 | SV *sv; |
358 | SV *sv; // result scalar |
36 | UV flags; |
359 | JSON json; |
37 | int max_recurse; |
360 | U32 indent; // indentation level |
38 | int indent; |
361 | UV limit; // escape character values >= this value when encoding |
39 | } enc_t; |
362 | } enc_t; |
40 | |
363 | |
41 | // structure used for decoding JSON |
364 | INLINE void |
42 | typedef struct |
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43 | { |
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44 | char *cur; |
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45 | char *end; |
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46 | const char *err; |
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47 | UV flags; |
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48 | } dec_t; |
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49 | |
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50 | static UV * |
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51 | SvJSON (SV *sv) |
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52 | { |
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53 | if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash)) |
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54 | croak ("object is not of type JSON::XS"); |
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55 | |
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56 | return &SvUVX (SvRV (sv)); |
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57 | } |
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58 | |
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59 | ///////////////////////////////////////////////////////////////////////////// |
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60 | |
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61 | static void |
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62 | need (enc_t *enc, STRLEN len) |
365 | need (enc_t *enc, STRLEN len) |
63 | { |
366 | { |
64 | if (enc->cur + len >= enc->end) |
367 | if (expect_false ((uintptr_t)(enc->end - enc->cur) < len)) |
65 | { |
368 | { |
66 | STRLEN cur = enc->cur - SvPVX (enc->sv); |
369 | STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
67 | SvGROW (enc->sv, cur + len + 1); |
370 | SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
68 | enc->cur = SvPVX (enc->sv) + cur; |
371 | enc->cur = SvPVX (enc->sv) + cur; |
69 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv); |
372 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
70 | } |
373 | } |
71 | } |
374 | } |
72 | |
375 | |
73 | static void |
376 | INLINE void |
74 | encode_ch (enc_t *enc, char ch) |
377 | encode_ch (enc_t *enc, char ch) |
75 | { |
378 | { |
76 | need (enc, 1); |
379 | need (enc, 1); |
77 | *enc->cur++ = ch; |
380 | *enc->cur++ = ch; |
78 | } |
381 | } |
… | |
… | |
86 | |
389 | |
87 | while (str < end) |
390 | while (str < end) |
88 | { |
391 | { |
89 | unsigned char ch = *(unsigned char *)str; |
392 | unsigned char ch = *(unsigned char *)str; |
90 | |
393 | |
91 | if (ch >= 0x20 && ch < 0x80) // most common case |
394 | if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
92 | { |
395 | { |
93 | if (ch == '"') // but with slow exceptions |
396 | if (expect_false (ch == '"')) // but with slow exceptions |
94 | { |
397 | { |
95 | need (enc, len += 1); |
398 | need (enc, len += 1); |
96 | *enc->cur++ = '\\'; |
399 | *enc->cur++ = '\\'; |
97 | *enc->cur++ = '"'; |
400 | *enc->cur++ = '"'; |
98 | } |
401 | } |
99 | else if (ch == '\\') |
402 | else if (expect_false (ch == '\\')) |
100 | { |
403 | { |
101 | need (enc, len += 1); |
404 | need (enc, len += 1); |
102 | *enc->cur++ = '\\'; |
405 | *enc->cur++ = '\\'; |
103 | *enc->cur++ = '\\'; |
406 | *enc->cur++ = '\\'; |
104 | } |
407 | } |
… | |
… | |
122 | STRLEN clen; |
425 | STRLEN clen; |
123 | UV uch; |
426 | UV uch; |
124 | |
427 | |
125 | if (is_utf8) |
428 | if (is_utf8) |
126 | { |
429 | { |
127 | uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY); |
430 | uch = decode_utf8 (str, end - str, &clen); |
128 | if (clen == (STRLEN)-1) |
431 | if (clen == (STRLEN)-1) |
129 | croak ("malformed UTF-8 character in string, cannot convert to JSON"); |
432 | croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
130 | } |
433 | } |
131 | else |
434 | else |
132 | { |
435 | { |
133 | uch = ch; |
436 | uch = ch; |
134 | clen = 1; |
437 | clen = 1; |
135 | } |
438 | } |
136 | |
439 | |
137 | if (uch < 0x80 || enc->flags & F_ASCII) |
440 | if (uch < 0x80/*0x20*/ || uch >= enc->limit) |
138 | { |
441 | { |
139 | if (uch > 0xFFFFUL) |
442 | if (uch >= 0x10000UL) |
140 | { |
443 | { |
|
|
444 | if (uch >= 0x110000UL) |
|
|
445 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
|
|
446 | |
141 | need (enc, len += 11); |
447 | need (enc, len += 11); |
142 | sprintf (enc->cur, "\\u%04x\\u%04x", |
448 | sprintf (enc->cur, "\\u%04x\\u%04x", |
143 | (uch - 0x10000) / 0x400 + 0xD800, |
449 | (int)((uch - 0x10000) / 0x400 + 0xD800), |
144 | (uch - 0x10000) % 0x400 + 0xDC00); |
450 | (int)((uch - 0x10000) % 0x400 + 0xDC00)); |
145 | enc->cur += 12; |
451 | enc->cur += 12; |
146 | } |
452 | } |
147 | else |
453 | else |
148 | { |
454 | { |
149 | static char hexdigit [16] = "0123456789abcdef"; |
|
|
150 | need (enc, len += 5); |
455 | need (enc, len += 5); |
151 | *enc->cur++ = '\\'; |
456 | *enc->cur++ = '\\'; |
152 | *enc->cur++ = 'u'; |
457 | *enc->cur++ = 'u'; |
153 | *enc->cur++ = hexdigit [ uch >> 12 ]; |
458 | *enc->cur++ = PL_hexdigit [ uch >> 12 ]; |
154 | *enc->cur++ = hexdigit [(uch >> 8) & 15]; |
459 | *enc->cur++ = PL_hexdigit [(uch >> 8) & 15]; |
155 | *enc->cur++ = hexdigit [(uch >> 4) & 15]; |
460 | *enc->cur++ = PL_hexdigit [(uch >> 4) & 15]; |
156 | *enc->cur++ = hexdigit [(uch >> 0) & 15]; |
461 | *enc->cur++ = PL_hexdigit [(uch >> 0) & 15]; |
157 | } |
462 | } |
158 | |
463 | |
|
|
464 | str += clen; |
|
|
465 | } |
|
|
466 | else if (enc->json.flags & F_LATIN1) |
|
|
467 | { |
|
|
468 | *enc->cur++ = uch; |
159 | str += clen; |
469 | str += clen; |
160 | } |
470 | } |
161 | else if (is_utf8) |
471 | else if (is_utf8) |
162 | { |
472 | { |
163 | need (enc, len += clen); |
473 | need (enc, len += clen); |
… | |
… | |
167 | } |
477 | } |
168 | while (--clen); |
478 | while (--clen); |
169 | } |
479 | } |
170 | else |
480 | else |
171 | { |
481 | { |
172 | need (enc, 10); // never more than 11 bytes needed |
482 | need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
173 | enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
483 | enc->cur = encode_utf8 (enc->cur, uch); |
174 | ++str; |
484 | ++str; |
175 | } |
485 | } |
176 | } |
486 | } |
177 | } |
487 | } |
178 | } |
488 | } |
179 | |
489 | |
180 | --len; |
490 | --len; |
181 | } |
491 | } |
182 | } |
492 | } |
183 | |
493 | |
184 | #define INDENT SB \ |
494 | INLINE void |
|
|
495 | encode_indent (enc_t *enc) |
|
|
496 | { |
185 | if (enc->flags & F_INDENT) \ |
497 | if (enc->json.flags & F_INDENT) |
186 | { \ |
498 | { |
187 | int i_; \ |
499 | int spaces = enc->indent * INDENT_STEP; |
188 | need (enc, enc->indent); \ |
500 | |
189 | for (i_ = enc->indent * 3; i_--; )\ |
501 | need (enc, spaces); |
|
|
502 | memset (enc->cur, ' ', spaces); |
|
|
503 | enc->cur += spaces; |
|
|
504 | } |
|
|
505 | } |
|
|
506 | |
|
|
507 | INLINE void |
|
|
508 | encode_space (enc_t *enc) |
|
|
509 | { |
|
|
510 | need (enc, 1); |
|
|
511 | encode_ch (enc, ' '); |
|
|
512 | } |
|
|
513 | |
|
|
514 | INLINE void |
|
|
515 | encode_nl (enc_t *enc) |
|
|
516 | { |
|
|
517 | if (enc->json.flags & F_INDENT) |
|
|
518 | { |
|
|
519 | need (enc, 1); |
190 | encode_ch (enc, ' '); \ |
520 | encode_ch (enc, '\n'); |
191 | } \ |
521 | } |
192 | SE |
522 | } |
193 | |
523 | |
194 | #define SPACE SB need (enc, 1); encode_ch (enc, ' '); SE |
524 | INLINE void |
195 | #define NL SB if (enc->flags & F_INDENT) { need (enc, 1); encode_ch (enc, '\n'); } SE |
525 | encode_comma (enc_t *enc) |
196 | #define COMMA SB \ |
526 | { |
197 | encode_ch (enc, ','); \ |
527 | encode_ch (enc, ','); |
|
|
528 | |
198 | if (enc->flags & F_INDENT) \ |
529 | if (enc->json.flags & F_INDENT) |
199 | NL; \ |
530 | encode_nl (enc); |
200 | else if (enc->flags & F_SPACE_AFTER) \ |
531 | else if (enc->json.flags & F_SPACE_AFTER) |
201 | SPACE; \ |
532 | encode_space (enc); |
202 | SE |
533 | } |
203 | |
534 | |
204 | static void encode_sv (enc_t *enc, SV *sv); |
535 | static void encode_sv (enc_t *enc, SV *sv); |
205 | |
536 | |
206 | static void |
537 | static void |
207 | encode_av (enc_t *enc, AV *av) |
538 | encode_av (enc_t *enc, AV *av) |
208 | { |
539 | { |
209 | int i, len = av_len (av); |
540 | int i, len = av_len (av); |
210 | |
541 | |
|
|
542 | if (enc->indent >= enc->json.max_depth) |
|
|
543 | croak (ERR_NESTING_EXCEEDED); |
|
|
544 | |
211 | encode_ch (enc, '['); NL; |
545 | encode_ch (enc, '['); |
212 | ++enc->indent; |
|
|
213 | |
546 | |
|
|
547 | if (len >= 0) |
|
|
548 | { |
|
|
549 | encode_nl (enc); ++enc->indent; |
|
|
550 | |
214 | for (i = 0; i <= len; ++i) |
551 | for (i = 0; i <= len; ++i) |
215 | { |
552 | { |
216 | INDENT; |
553 | SV **svp = av_fetch (av, i, 0); |
217 | encode_sv (enc, *av_fetch (av, i, 0)); |
|
|
218 | |
554 | |
|
|
555 | encode_indent (enc); |
|
|
556 | |
|
|
557 | if (svp) |
|
|
558 | encode_sv (enc, *svp); |
|
|
559 | else |
|
|
560 | encode_str (enc, "null", 4, 0); |
|
|
561 | |
219 | if (i < len) |
562 | if (i < len) |
220 | COMMA; |
563 | encode_comma (enc); |
221 | } |
564 | } |
222 | |
565 | |
223 | NL; |
566 | encode_nl (enc); --enc->indent; encode_indent (enc); |
|
|
567 | } |
224 | |
568 | |
225 | --enc->indent; |
|
|
226 | INDENT; encode_ch (enc, ']'); |
569 | encode_ch (enc, ']'); |
227 | } |
570 | } |
228 | |
571 | |
229 | static void |
572 | static void |
230 | encode_he (enc_t *enc, HE *he) |
573 | encode_hk (enc_t *enc, HE *he) |
231 | { |
574 | { |
232 | encode_ch (enc, '"'); |
575 | encode_ch (enc, '"'); |
233 | |
576 | |
234 | if (HeKLEN (he) == HEf_SVKEY) |
577 | if (HeKLEN (he) == HEf_SVKEY) |
235 | { |
578 | { |
236 | SV *sv = HeSVKEY (he); |
579 | SV *sv = HeSVKEY (he); |
237 | STRLEN len; |
580 | STRLEN len; |
238 | char *str; |
581 | char *str; |
239 | |
582 | |
240 | SvGETMAGIC (sv); |
583 | SvGETMAGIC (sv); |
241 | str = SvPV (sv, len); |
584 | str = SvPV (sv, len); |
242 | |
585 | |
243 | encode_str (enc, str, len, SvUTF8 (sv)); |
586 | encode_str (enc, str, len, SvUTF8 (sv)); |
244 | } |
587 | } |
245 | else |
588 | else |
246 | encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
589 | encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
247 | |
590 | |
248 | encode_ch (enc, '"'); |
591 | encode_ch (enc, '"'); |
249 | |
592 | |
250 | if (enc->flags & F_SPACE_BEFORE) SPACE; |
593 | if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc); |
251 | encode_ch (enc, ':'); |
594 | encode_ch (enc, ':'); |
252 | if (enc->flags & F_SPACE_AFTER ) SPACE; |
595 | if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc); |
253 | encode_sv (enc, HeVAL (he)); |
|
|
254 | } |
596 | } |
255 | |
597 | |
256 | // compare hash entries, used when all keys are bytestrings |
598 | // compare hash entries, used when all keys are bytestrings |
257 | static int |
599 | static int |
258 | he_cmp_fast (const void *a_, const void *b_) |
600 | he_cmp_fast (const void *a_, const void *b_) |
… | |
… | |
263 | HE *b = *(HE **)b_; |
605 | HE *b = *(HE **)b_; |
264 | |
606 | |
265 | STRLEN la = HeKLEN (a); |
607 | STRLEN la = HeKLEN (a); |
266 | STRLEN lb = HeKLEN (b); |
608 | STRLEN lb = HeKLEN (b); |
267 | |
609 | |
268 | if (!(cmp == memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) |
610 | if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la))) |
269 | cmp = la < lb ? -1 : la == lb ? 0 : 1; |
611 | cmp = lb - la; |
270 | |
612 | |
271 | return cmp; |
613 | return cmp; |
272 | } |
614 | } |
273 | |
615 | |
274 | // compare hash entries, used when some keys are sv's or utf-x |
616 | // compare hash entries, used when some keys are sv's or utf-x |
275 | static int |
617 | static int |
276 | he_cmp_slow (const void *a, const void *b) |
618 | he_cmp_slow (const void *a, const void *b) |
277 | { |
619 | { |
278 | return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); |
620 | return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a)); |
279 | } |
621 | } |
280 | |
622 | |
281 | static void |
623 | static void |
282 | encode_hv (enc_t *enc, HV *hv) |
624 | encode_hv (enc_t *enc, HV *hv) |
283 | { |
625 | { |
284 | int count, i; |
626 | HE *he; |
285 | |
627 | |
286 | encode_ch (enc, '{'); NL; ++enc->indent; |
628 | if (enc->indent >= enc->json.max_depth) |
|
|
629 | croak (ERR_NESTING_EXCEEDED); |
287 | |
630 | |
288 | if ((count = hv_iterinit (hv))) |
631 | encode_ch (enc, '{'); |
289 | { |
632 | |
290 | // for canonical output we have to sort by keys first |
633 | // for canonical output we have to sort by keys first |
291 | // actually, this is mostly due to the stupid so-called |
634 | // actually, this is mostly due to the stupid so-called |
292 | // security workaround added somewhere in 5.8.x. |
635 | // security workaround added somewhere in 5.8.x |
293 | // that randomises hash orderings |
636 | // that randomises hash orderings |
294 | if (enc->flags & F_CANONICAL) |
637 | if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv)) |
|
|
638 | { |
|
|
639 | int count = hv_iterinit (hv); |
|
|
640 | |
|
|
641 | if (SvMAGICAL (hv)) |
295 | { |
642 | { |
296 | HE *he, *hes [count]; |
643 | // need to count by iterating. could improve by dynamically building the vector below |
|
|
644 | // but I don't care for the speed of this special case. |
|
|
645 | // note also that we will run into undefined behaviour when the two iterations |
|
|
646 | // do not result in the same count, something I might care for in some later release. |
|
|
647 | |
|
|
648 | count = 0; |
|
|
649 | while (hv_iternext (hv)) |
|
|
650 | ++count; |
|
|
651 | |
|
|
652 | hv_iterinit (hv); |
|
|
653 | } |
|
|
654 | |
|
|
655 | if (count) |
|
|
656 | { |
297 | int fast = 1; |
657 | int i, fast = 1; |
|
|
658 | HE *hes_stack [STACK_HES]; |
|
|
659 | HE **hes = hes_stack; |
|
|
660 | |
|
|
661 | // allocate larger arrays on the heap |
|
|
662 | if (count > STACK_HES) |
|
|
663 | { |
|
|
664 | SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes))); |
|
|
665 | hes = (HE **)SvPVX (sv); |
|
|
666 | } |
298 | |
667 | |
299 | i = 0; |
668 | i = 0; |
300 | while ((he = hv_iternext (hv))) |
669 | while ((he = hv_iternext (hv))) |
301 | { |
670 | { |
302 | hes [i++] = he; |
671 | hes [i++] = he; |
… | |
… | |
308 | |
677 | |
309 | if (fast) |
678 | if (fast) |
310 | qsort (hes, count, sizeof (HE *), he_cmp_fast); |
679 | qsort (hes, count, sizeof (HE *), he_cmp_fast); |
311 | else |
680 | else |
312 | { |
681 | { |
313 | // hack to disable "use bytes" |
682 | // hack to forcefully disable "use bytes" |
314 | COP *oldcop = PL_curcop, cop; |
683 | COP cop = *PL_curcop; |
315 | cop.op_private = 0; |
684 | cop.op_private = 0; |
|
|
685 | |
|
|
686 | ENTER; |
|
|
687 | SAVETMPS; |
|
|
688 | |
|
|
689 | SAVEVPTR (PL_curcop); |
316 | PL_curcop = &cop; |
690 | PL_curcop = &cop; |
317 | |
691 | |
318 | SAVETMPS; |
|
|
319 | qsort (hes, count, sizeof (HE *), he_cmp_slow); |
692 | qsort (hes, count, sizeof (HE *), he_cmp_slow); |
|
|
693 | |
320 | FREETMPS; |
694 | FREETMPS; |
321 | |
695 | LEAVE; |
322 | PL_curcop = oldcop; |
|
|
323 | } |
696 | } |
324 | |
697 | |
325 | for (i = 0; i < count; ++i) |
698 | encode_nl (enc); ++enc->indent; |
|
|
699 | |
|
|
700 | while (count--) |
326 | { |
701 | { |
327 | INDENT; |
702 | encode_indent (enc); |
|
|
703 | he = hes [count]; |
328 | encode_he (enc, hes [i]); |
704 | encode_hk (enc, he); |
|
|
705 | encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he)); |
329 | |
706 | |
330 | if (i < count - 1) |
707 | if (count) |
331 | COMMA; |
708 | encode_comma (enc); |
332 | } |
709 | } |
333 | |
710 | |
334 | NL; |
711 | encode_nl (enc); --enc->indent; encode_indent (enc); |
335 | } |
712 | } |
|
|
713 | } |
|
|
714 | else |
|
|
715 | { |
|
|
716 | if (hv_iterinit (hv) || SvMAGICAL (hv)) |
|
|
717 | if ((he = hv_iternext (hv))) |
|
|
718 | { |
|
|
719 | encode_nl (enc); ++enc->indent; |
|
|
720 | |
|
|
721 | for (;;) |
|
|
722 | { |
|
|
723 | encode_indent (enc); |
|
|
724 | encode_hk (enc, he); |
|
|
725 | encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he)); |
|
|
726 | |
|
|
727 | if (!(he = hv_iternext (hv))) |
|
|
728 | break; |
|
|
729 | |
|
|
730 | encode_comma (enc); |
|
|
731 | } |
|
|
732 | |
|
|
733 | encode_nl (enc); --enc->indent; encode_indent (enc); |
|
|
734 | } |
|
|
735 | } |
|
|
736 | |
|
|
737 | encode_ch (enc, '}'); |
|
|
738 | } |
|
|
739 | |
|
|
740 | // encode objects, arrays and special \0=false and \1=true values. |
|
|
741 | static void |
|
|
742 | encode_rv (enc_t *enc, SV *sv) |
|
|
743 | { |
|
|
744 | svtype svt; |
|
|
745 | GV *method; |
|
|
746 | |
|
|
747 | SvGETMAGIC (sv); |
|
|
748 | svt = SvTYPE (sv); |
|
|
749 | |
|
|
750 | if (expect_false (SvOBJECT (sv))) |
|
|
751 | { |
|
|
752 | HV *stash = SvSTASH (sv); |
|
|
753 | |
|
|
754 | if (stash == bool_stash) |
|
|
755 | { |
|
|
756 | if (SvIV (sv)) |
|
|
757 | encode_str (enc, "true", 4, 0); |
|
|
758 | else |
|
|
759 | encode_str (enc, "false", 5, 0); |
|
|
760 | } |
|
|
761 | else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0))) |
|
|
762 | { |
|
|
763 | int count; |
|
|
764 | dSP; |
|
|
765 | |
|
|
766 | ENTER; SAVETMPS; |
|
|
767 | SAVESTACK_POS (); |
|
|
768 | PUSHMARK (SP); |
|
|
769 | EXTEND (SP, 2); |
|
|
770 | // we re-bless the reference to get overload and other niceties right |
|
|
771 | PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
|
|
772 | PUSHs (sv_json); |
|
|
773 | |
|
|
774 | PUTBACK; |
|
|
775 | count = call_sv ((SV *)GvCV (method), G_ARRAY); |
|
|
776 | SPAGAIN; |
|
|
777 | |
|
|
778 | // catch this surprisingly common error |
|
|
779 | if (SvROK (TOPs) && SvRV (TOPs) == sv) |
|
|
780 | croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv))); |
|
|
781 | |
|
|
782 | encode_ch (enc, '('); |
|
|
783 | encode_ch (enc, '"'); |
|
|
784 | encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash)); |
|
|
785 | encode_ch (enc, '"'); |
|
|
786 | encode_ch (enc, ')'); |
|
|
787 | encode_ch (enc, '['); |
|
|
788 | |
|
|
789 | while (count) |
|
|
790 | { |
|
|
791 | encode_sv (enc, SP[1 - count--]); |
|
|
792 | |
|
|
793 | if (count) |
|
|
794 | encode_ch (enc, ','); |
|
|
795 | } |
|
|
796 | |
|
|
797 | encode_ch (enc, ']'); |
|
|
798 | |
|
|
799 | FREETMPS; LEAVE; |
|
|
800 | } |
|
|
801 | else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0))) |
|
|
802 | { |
|
|
803 | dSP; |
|
|
804 | |
|
|
805 | ENTER; SAVETMPS; |
|
|
806 | PUSHMARK (SP); |
|
|
807 | // we re-bless the reference to get overload and other niceties right |
|
|
808 | XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
|
|
809 | |
|
|
810 | // calling with G_SCALAR ensures that we always get a 1 return value |
|
|
811 | PUTBACK; |
|
|
812 | call_sv ((SV *)GvCV (method), G_SCALAR); |
|
|
813 | SPAGAIN; |
|
|
814 | |
|
|
815 | // catch this surprisingly common error |
|
|
816 | if (SvROK (TOPs) && SvRV (TOPs) == sv) |
|
|
817 | croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv))); |
|
|
818 | |
|
|
819 | sv = POPs; |
|
|
820 | PUTBACK; |
|
|
821 | |
|
|
822 | encode_sv (enc, sv); |
|
|
823 | |
|
|
824 | FREETMPS; LEAVE; |
|
|
825 | } |
|
|
826 | else if (enc->json.flags & F_ALLOW_BLESSED) |
|
|
827 | encode_str (enc, "null", 4, 0); |
336 | else |
828 | else |
337 | { |
829 | croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)", |
338 | SV *sv; |
830 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
339 | HE *he = hv_iternext (hv); |
831 | } |
340 | |
832 | else if (svt == SVt_PVHV) |
341 | for (;;) |
833 | encode_hv (enc, (HV *)sv); |
342 | { |
834 | else if (svt == SVt_PVAV) |
343 | INDENT; |
835 | encode_av (enc, (AV *)sv); |
344 | encode_he (enc, he); |
836 | else if (svt < SVt_PVAV) |
345 | |
|
|
346 | if (!(he = hv_iternext (hv))) |
|
|
347 | break; |
|
|
348 | |
|
|
349 | COMMA; |
|
|
350 | } |
|
|
351 | |
|
|
352 | NL; |
|
|
353 | } |
|
|
354 | } |
837 | { |
|
|
838 | int bool_type = ref_bool_type (sv); |
355 | |
839 | |
356 | --enc->indent; INDENT; encode_ch (enc, '}'); |
840 | if (bool_type == 1) |
|
|
841 | encode_str (enc, "true", 4, 0); |
|
|
842 | else if (bool_type == 0) |
|
|
843 | encode_str (enc, "false", 5, 0); |
|
|
844 | else if (enc->json.flags & F_ALLOW_UNKNOWN) |
|
|
845 | encode_str (enc, "null", 4, 0); |
|
|
846 | else |
|
|
847 | croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
|
|
848 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
|
|
849 | } |
|
|
850 | else if (enc->json.flags & F_ALLOW_UNKNOWN) |
|
|
851 | encode_str (enc, "null", 4, 0); |
|
|
852 | else |
|
|
853 | croak ("encountered %s, but JSON can only represent references to arrays or hashes", |
|
|
854 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
357 | } |
855 | } |
358 | |
856 | |
359 | static void |
857 | static void |
360 | encode_sv (enc_t *enc, SV *sv) |
858 | encode_sv (enc_t *enc, SV *sv) |
361 | { |
859 | { |
… | |
… | |
369 | encode_str (enc, str, len, SvUTF8 (sv)); |
867 | encode_str (enc, str, len, SvUTF8 (sv)); |
370 | encode_ch (enc, '"'); |
868 | encode_ch (enc, '"'); |
371 | } |
869 | } |
372 | else if (SvNOKp (sv)) |
870 | else if (SvNOKp (sv)) |
373 | { |
871 | { |
|
|
872 | // trust that perl will do the right thing w.r.t. JSON syntax. |
374 | need (enc, NV_DIG + 32); |
873 | need (enc, NV_DIG + 32); |
375 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
874 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
376 | enc->cur += strlen (enc->cur); |
875 | enc->cur += strlen (enc->cur); |
377 | } |
876 | } |
378 | else if (SvIOKp (sv)) |
877 | else if (SvIOKp (sv)) |
379 | { |
878 | { |
|
|
879 | // we assume we can always read an IV as a UV and vice versa |
|
|
880 | // we assume two's complement |
|
|
881 | // we assume no aliasing issues in the union |
|
|
882 | if (SvIsUV (sv) ? SvUVX (sv) <= 59000 |
|
|
883 | : SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000) |
|
|
884 | { |
|
|
885 | // optimise the "small number case" |
|
|
886 | // code will likely be branchless and use only a single multiplication |
|
|
887 | // works for numbers up to 59074 |
|
|
888 | I32 i = SvIVX (sv); |
|
|
889 | U32 u; |
|
|
890 | char digit, nz = 0; |
|
|
891 | |
380 | need (enc, 64); |
892 | need (enc, 6); |
|
|
893 | |
|
|
894 | *enc->cur = '-'; enc->cur += i < 0 ? 1 : 0; |
|
|
895 | u = i < 0 ? -i : i; |
|
|
896 | |
|
|
897 | // convert to 4.28 fixed-point representation |
|
|
898 | u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits |
|
|
899 | |
|
|
900 | // now output digit by digit, each time masking out the integer part |
|
|
901 | // and multiplying by 5 while moving the decimal point one to the right, |
|
|
902 | // resulting in a net multiplication by 10. |
|
|
903 | // we always write the digit to memory but conditionally increment |
|
|
904 | // the pointer, to enable the use of conditional move instructions. |
|
|
905 | digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5; |
|
|
906 | digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5; |
|
|
907 | digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5; |
|
|
908 | digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5; |
|
|
909 | digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' |
|
|
910 | } |
|
|
911 | else |
|
|
912 | { |
|
|
913 | // large integer, use the (rather slow) snprintf way. |
|
|
914 | need (enc, IVUV_MAXCHARS); |
381 | enc->cur += |
915 | enc->cur += |
382 | SvIsUV(sv) |
916 | SvIsUV(sv) |
383 | ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) |
917 | ? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv)) |
384 | : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); |
918 | : snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv)); |
|
|
919 | } |
385 | } |
920 | } |
386 | else if (SvROK (sv)) |
921 | else if (SvROK (sv)) |
387 | { |
922 | encode_rv (enc, SvRV (sv)); |
388 | if (!--enc->max_recurse) |
923 | else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN) |
389 | croak ("data structure too deep (hit recursion limit)"); |
|
|
390 | |
|
|
391 | sv = SvRV (sv); |
|
|
392 | |
|
|
393 | switch (SvTYPE (sv)) |
|
|
394 | { |
|
|
395 | case SVt_PVAV: encode_av (enc, (AV *)sv); break; |
|
|
396 | case SVt_PVHV: encode_hv (enc, (HV *)sv); break; |
|
|
397 | |
|
|
398 | default: |
|
|
399 | croak ("JSON can only represent references to arrays or hashes"); |
|
|
400 | } |
|
|
401 | } |
|
|
402 | else if (!SvOK (sv)) |
|
|
403 | encode_str (enc, "null", 4, 0); |
924 | encode_str (enc, "null", 4, 0); |
404 | else |
925 | else |
405 | croak ("encountered perl type that JSON cannot handle"); |
926 | croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data", |
|
|
927 | SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
406 | } |
928 | } |
407 | |
929 | |
408 | static SV * |
930 | static SV * |
409 | encode_json (SV *scalar, UV flags) |
931 | encode_json (SV *scalar, JSON *json) |
410 | { |
932 | { |
411 | if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
|
|
412 | croak ("hash- or arraref required (not a simple scalar, use allow_nonref to allow this)"); |
|
|
413 | |
|
|
414 | enc_t enc; |
933 | enc_t enc; |
415 | enc.flags = flags; |
934 | |
|
|
935 | if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar)) |
|
|
936 | croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
|
|
937 | |
|
|
938 | enc.json = *json; |
416 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
939 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
417 | enc.cur = SvPVX (enc.sv); |
940 | enc.cur = SvPVX (enc.sv); |
418 | enc.end = SvEND (enc.sv); |
941 | enc.end = SvEND (enc.sv); |
419 | enc.max_recurse = 0; |
|
|
420 | enc.indent = 0; |
942 | enc.indent = 0; |
|
|
943 | enc.limit = enc.json.flags & F_ASCII ? 0x000080UL |
|
|
944 | : enc.json.flags & F_LATIN1 ? 0x000100UL |
|
|
945 | : 0x110000UL; |
421 | |
946 | |
422 | SvPOK_only (enc.sv); |
947 | SvPOK_only (enc.sv); |
423 | encode_sv (&enc, scalar); |
948 | encode_sv (&enc, scalar); |
|
|
949 | encode_nl (&enc); |
424 | |
950 | |
|
|
951 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
952 | *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
|
|
953 | |
425 | if (!(flags & (F_ASCII | F_UTF8))) |
954 | if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8))) |
426 | SvUTF8_on (enc.sv); |
955 | SvUTF8_on (enc.sv); |
427 | |
956 | |
428 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
429 | |
|
|
430 | #ifdef SvPV_shrink_to_cur |
|
|
431 | if (enc.flags & F_SHRINK) |
957 | if (enc.json.flags & F_SHRINK) |
432 | SvPV_shrink_to_cur (enc.sv); |
958 | shrink (enc.sv); |
433 | #endif |
959 | |
434 | return enc.sv; |
960 | return enc.sv; |
435 | } |
961 | } |
436 | |
962 | |
437 | ///////////////////////////////////////////////////////////////////////////// |
963 | ///////////////////////////////////////////////////////////////////////////// |
|
|
964 | // decoder |
438 | |
965 | |
439 | #define WS \ |
966 | // structure used for decoding JSON |
|
|
967 | typedef struct |
|
|
968 | { |
|
|
969 | char *cur; // current parser pointer |
|
|
970 | char *end; // end of input string |
|
|
971 | const char *err; // parse error, if != 0 |
|
|
972 | JSON json; |
|
|
973 | U32 depth; // recursion depth |
|
|
974 | U32 maxdepth; // recursion depth limit |
|
|
975 | } dec_t; |
|
|
976 | |
|
|
977 | INLINE void |
|
|
978 | decode_comment (dec_t *dec) |
|
|
979 | { |
|
|
980 | // only '#'-style comments allowed a.t.m. |
|
|
981 | |
|
|
982 | while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d) |
|
|
983 | ++dec->cur; |
|
|
984 | } |
|
|
985 | |
|
|
986 | INLINE void |
|
|
987 | decode_ws (dec_t *dec) |
|
|
988 | { |
440 | for (;;) \ |
989 | for (;;) |
441 | { \ |
990 | { |
442 | char ch = *dec->cur; \ |
991 | char ch = *dec->cur; |
|
|
992 | |
443 | if (ch > 0x20 \ |
993 | if (ch > 0x20) |
|
|
994 | { |
|
|
995 | if (expect_false (ch == '#')) |
|
|
996 | { |
|
|
997 | if (dec->json.flags & F_RELAXED) |
|
|
998 | decode_comment (dec); |
|
|
999 | else |
|
|
1000 | break; |
|
|
1001 | } |
|
|
1002 | else |
|
|
1003 | break; |
|
|
1004 | } |
444 | || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) \ |
1005 | else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09) |
445 | break; \ |
1006 | break; // parse error, but let higher level handle it, gives better error messages |
|
|
1007 | |
446 | ++dec->cur; \ |
1008 | ++dec->cur; |
447 | } |
1009 | } |
|
|
1010 | } |
448 | |
1011 | |
449 | #define ERR(reason) SB dec->err = reason; goto fail; SE |
1012 | #define ERR(reason) SB dec->err = reason; goto fail; SE |
|
|
1013 | |
450 | #define EXPECT_CH(ch) SB \ |
1014 | #define EXPECT_CH(ch) SB \ |
451 | if (*dec->cur != ch) \ |
1015 | if (*dec->cur != ch) \ |
452 | ERR (# ch " expected"); \ |
1016 | ERR (# ch " expected"); \ |
453 | ++dec->cur; \ |
1017 | ++dec->cur; \ |
454 | SE |
1018 | SE |
455 | |
1019 | |
|
|
1020 | #define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED) |
|
|
1021 | #define DEC_DEC_DEPTH --dec->depth |
|
|
1022 | |
456 | static SV *decode_sv (dec_t *dec); |
1023 | static SV *decode_sv (dec_t *dec); |
457 | |
1024 | |
458 | static signed char decode_hexdigit[256]; |
1025 | static signed char decode_hexdigit[256]; |
459 | |
1026 | |
460 | static UV |
1027 | static UV |
461 | decode_4hex (dec_t *dec) |
1028 | decode_4hex (dec_t *dec) |
462 | { |
1029 | { |
463 | signed char d1, d2, d3, d4; |
1030 | signed char d1, d2, d3, d4; |
|
|
1031 | unsigned char *cur = (unsigned char *)dec->cur; |
464 | |
1032 | |
465 | d1 = decode_hexdigit [((unsigned char *)dec->cur) [0]]; |
1033 | d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected"); |
466 | if (d1 < 0) ERR ("four hexadecimal digits expected"); |
1034 | d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected"); |
467 | d2 = decode_hexdigit [((unsigned char *)dec->cur) [1]]; |
1035 | d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected"); |
468 | if (d2 < 0) ERR ("four hexadecimal digits expected"); |
1036 | d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected"); |
469 | d3 = decode_hexdigit [((unsigned char *)dec->cur) [2]]; |
|
|
470 | if (d3 < 0) ERR ("four hexadecimal digits expected"); |
|
|
471 | d4 = decode_hexdigit [((unsigned char *)dec->cur) [3]]; |
|
|
472 | if (d4 < 0) ERR ("four hexadecimal digits expected"); |
|
|
473 | |
1037 | |
474 | dec->cur += 4; |
1038 | dec->cur += 4; |
475 | |
1039 | |
476 | return ((UV)d1) << 12 |
1040 | return ((UV)d1) << 12 |
477 | | ((UV)d2) << 8 |
1041 | | ((UV)d2) << 8 |
… | |
… | |
480 | |
1044 | |
481 | fail: |
1045 | fail: |
482 | return (UV)-1; |
1046 | return (UV)-1; |
483 | } |
1047 | } |
484 | |
1048 | |
485 | #define APPEND_GROW(n) SB \ |
|
|
486 | if (cur + (n) >= end) \ |
|
|
487 | { \ |
|
|
488 | STRLEN ofs = cur - SvPVX (sv); \ |
|
|
489 | SvGROW (sv, ofs + (n) + 1); \ |
|
|
490 | cur = SvPVX (sv) + ofs; \ |
|
|
491 | end = SvEND (sv); \ |
|
|
492 | } \ |
|
|
493 | SE |
|
|
494 | |
|
|
495 | #define APPEND_CH(ch) SB \ |
|
|
496 | APPEND_GROW (1); \ |
|
|
497 | *cur++ = (ch); \ |
|
|
498 | SE |
|
|
499 | |
|
|
500 | static SV * |
1049 | static SV * |
501 | decode_str (dec_t *dec) |
1050 | decode_str (dec_t *dec) |
502 | { |
1051 | { |
503 | SV *sv = NEWSV (0,2); |
1052 | SV *sv = 0; |
504 | int utf8 = 0; |
1053 | int utf8 = 0; |
505 | char *cur = SvPVX (sv); |
1054 | char *dec_cur = dec->cur; |
506 | char *end = SvEND (sv); |
|
|
507 | |
1055 | |
508 | for (;;) |
1056 | do |
509 | { |
1057 | { |
510 | unsigned char ch = *(unsigned char *)dec->cur; |
1058 | char buf [SHORT_STRING_LEN + UTF8_MAXBYTES]; |
|
|
1059 | char *cur = buf; |
511 | |
1060 | |
512 | if (ch == '"') |
1061 | do |
513 | break; |
|
|
514 | else if (ch == '\\') |
|
|
515 | { |
1062 | { |
516 | switch (*++dec->cur) |
1063 | unsigned char ch = *(unsigned char *)dec_cur++; |
|
|
1064 | |
|
|
1065 | if (expect_false (ch == '"')) |
517 | { |
1066 | { |
518 | case '\\': |
1067 | --dec_cur; |
519 | case '/': |
1068 | break; |
520 | case '"': APPEND_CH (*dec->cur++); break; |
1069 | } |
521 | |
1070 | else if (expect_false (ch == '\\')) |
522 | case 'b': APPEND_CH ('\010'); ++dec->cur; break; |
1071 | { |
523 | case 't': APPEND_CH ('\011'); ++dec->cur; break; |
1072 | switch (*dec_cur) |
524 | case 'n': APPEND_CH ('\012'); ++dec->cur; break; |
|
|
525 | case 'f': APPEND_CH ('\014'); ++dec->cur; break; |
|
|
526 | case 'r': APPEND_CH ('\015'); ++dec->cur; break; |
|
|
527 | |
|
|
528 | case 'u': |
|
|
529 | { |
1073 | { |
530 | UV lo, hi; |
1074 | case '\\': |
531 | ++dec->cur; |
1075 | case '/': |
|
|
1076 | case '"': *cur++ = *dec_cur++; break; |
532 | |
1077 | |
533 | hi = decode_4hex (dec); |
1078 | case 'b': ++dec_cur; *cur++ = '\010'; break; |
534 | if (hi == (UV)-1) |
1079 | case 't': ++dec_cur; *cur++ = '\011'; break; |
535 | goto fail; |
1080 | case 'n': ++dec_cur; *cur++ = '\012'; break; |
|
|
1081 | case 'f': ++dec_cur; *cur++ = '\014'; break; |
|
|
1082 | case 'r': ++dec_cur; *cur++ = '\015'; break; |
536 | |
1083 | |
537 | // possibly a surrogate pair |
1084 | case 'u': |
538 | if (hi >= 0xd800 && hi < 0xdc00) |
|
|
539 | { |
1085 | { |
540 | if (dec->cur [0] != '\\' || dec->cur [1] != 'u') |
1086 | UV lo, hi; |
541 | ERR ("missing low surrogate character in surrogate pair"); |
1087 | ++dec_cur; |
542 | |
1088 | |
543 | dec->cur += 2; |
1089 | dec->cur = dec_cur; |
544 | |
|
|
545 | lo = decode_4hex (dec); |
1090 | hi = decode_4hex (dec); |
|
|
1091 | dec_cur = dec->cur; |
546 | if (lo == (UV)-1) |
1092 | if (hi == (UV)-1) |
547 | goto fail; |
1093 | goto fail; |
548 | |
1094 | |
|
|
1095 | // possibly a surrogate pair |
|
|
1096 | if (hi >= 0xd800) |
|
|
1097 | if (hi < 0xdc00) |
|
|
1098 | { |
|
|
1099 | if (dec_cur [0] != '\\' || dec_cur [1] != 'u') |
|
|
1100 | ERR ("missing low surrogate character in surrogate pair"); |
|
|
1101 | |
|
|
1102 | dec_cur += 2; |
|
|
1103 | |
|
|
1104 | dec->cur = dec_cur; |
|
|
1105 | lo = decode_4hex (dec); |
|
|
1106 | dec_cur = dec->cur; |
|
|
1107 | if (lo == (UV)-1) |
|
|
1108 | goto fail; |
|
|
1109 | |
549 | if (lo < 0xdc00 || lo >= 0xe000) |
1110 | if (lo < 0xdc00 || lo >= 0xe000) |
550 | ERR ("surrogate pair expected"); |
1111 | ERR ("surrogate pair expected"); |
551 | |
1112 | |
552 | hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000; |
1113 | hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000; |
|
|
1114 | } |
|
|
1115 | else if (hi < 0xe000) |
|
|
1116 | ERR ("missing high surrogate character in surrogate pair"); |
|
|
1117 | |
|
|
1118 | if (hi >= 0x80) |
|
|
1119 | { |
|
|
1120 | utf8 = 1; |
|
|
1121 | |
|
|
1122 | cur = encode_utf8 (cur, hi); |
|
|
1123 | } |
|
|
1124 | else |
|
|
1125 | *cur++ = hi; |
553 | } |
1126 | } |
554 | else if (hi >= 0xdc00 && hi < 0xe000) |
|
|
555 | ERR ("missing high surrogate character in surrogate pair"); |
|
|
556 | |
|
|
557 | if (hi >= 0x80) |
|
|
558 | { |
1127 | break; |
559 | utf8 = 1; |
|
|
560 | |
1128 | |
561 | APPEND_GROW (4); // at most 4 bytes for 21 bits |
|
|
562 | cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); |
|
|
563 | } |
|
|
564 | else |
1129 | default: |
565 | APPEND_CH (hi); |
1130 | --dec_cur; |
|
|
1131 | ERR ("illegal backslash escape sequence in string"); |
566 | } |
1132 | } |
567 | break; |
1133 | } |
|
|
1134 | else if (expect_true (ch >= 0x20 && ch < 0x80)) |
|
|
1135 | *cur++ = ch; |
|
|
1136 | else if (ch >= 0x80) |
|
|
1137 | { |
|
|
1138 | STRLEN clen; |
568 | |
1139 | |
569 | default: |
|
|
570 | --dec->cur; |
1140 | --dec_cur; |
571 | ERR ("illegal backslash escape sequence in string"); |
1141 | |
|
|
1142 | decode_utf8 (dec_cur, dec->end - dec_cur, &clen); |
|
|
1143 | if (clen == (STRLEN)-1) |
|
|
1144 | ERR ("malformed UTF-8 character in JSON string"); |
|
|
1145 | |
|
|
1146 | do |
|
|
1147 | *cur++ = *dec_cur++; |
|
|
1148 | while (--clen); |
|
|
1149 | |
|
|
1150 | utf8 = 1; |
|
|
1151 | } |
|
|
1152 | else if (ch == '\t' && dec->json.flags & F_RELAXED) |
|
|
1153 | *cur++ = ch; |
|
|
1154 | else |
|
|
1155 | { |
|
|
1156 | --dec_cur; |
|
|
1157 | |
|
|
1158 | if (!ch) |
|
|
1159 | ERR ("unexpected end of string while parsing JSON string"); |
|
|
1160 | else |
|
|
1161 | ERR ("invalid character encountered while parsing JSON string"); |
572 | } |
1162 | } |
573 | } |
1163 | } |
574 | else if (ch >= 0x20 && ch <= 0x7f) |
1164 | while (cur < buf + SHORT_STRING_LEN); |
575 | APPEND_CH (*dec->cur++); |
1165 | |
576 | else if (ch >= 0x80) |
|
|
577 | { |
1166 | { |
578 | STRLEN clen; |
1167 | STRLEN len = cur - buf; |
579 | UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY); |
|
|
580 | if (clen == (STRLEN)-1) |
|
|
581 | ERR ("malformed UTF-8 character in string, cannot convert to JSON"); |
|
|
582 | |
1168 | |
583 | APPEND_GROW (clen); |
1169 | if (sv) |
584 | do |
|
|
585 | { |
1170 | { |
586 | *cur++ = *dec->cur++; |
1171 | STRLEN cur = SvCUR (sv); |
|
|
1172 | |
|
|
1173 | if (SvLEN (sv) <= cur + len) |
|
|
1174 | SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
|
|
1175 | |
|
|
1176 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
|
|
1177 | SvCUR_set (sv, SvCUR (sv) + len); |
587 | } |
1178 | } |
588 | while (--clen); |
|
|
589 | |
|
|
590 | utf8 = 1; |
|
|
591 | } |
|
|
592 | else if (dec->cur == dec->end) |
|
|
593 | ERR ("unexpected end of string while parsing json string"); |
|
|
594 | else |
1179 | else |
595 | ERR ("invalid character encountered"); |
1180 | sv = newSVpvn (buf, len); |
596 | } |
1181 | } |
|
|
1182 | } |
|
|
1183 | while (*dec_cur != '"'); |
597 | |
1184 | |
598 | ++dec->cur; |
1185 | ++dec_cur; |
599 | |
1186 | |
600 | SvCUR_set (sv, cur - SvPVX (sv)); |
1187 | if (sv) |
601 | |
1188 | { |
602 | SvPOK_only (sv); |
1189 | SvPOK_only (sv); |
603 | *SvEND (sv) = 0; |
1190 | *SvEND (sv) = 0; |
604 | |
1191 | |
605 | if (utf8) |
1192 | if (utf8) |
606 | SvUTF8_on (sv); |
1193 | SvUTF8_on (sv); |
|
|
1194 | } |
|
|
1195 | else |
|
|
1196 | sv = newSVpvn ("", 0); |
607 | |
1197 | |
608 | #ifdef SvPV_shrink_to_cur |
1198 | dec->cur = dec_cur; |
609 | if (dec->flags & F_SHRINK) |
|
|
610 | SvPV_shrink_to_cur (sv); |
|
|
611 | #endif |
|
|
612 | |
|
|
613 | return sv; |
1199 | return sv; |
614 | |
1200 | |
615 | fail: |
1201 | fail: |
616 | SvREFCNT_dec (sv); |
1202 | dec->cur = dec_cur; |
617 | return 0; |
1203 | return 0; |
618 | } |
1204 | } |
619 | |
1205 | |
620 | static SV * |
1206 | static SV * |
621 | decode_num (dec_t *dec) |
1207 | decode_num (dec_t *dec) |
… | |
… | |
679 | is_nv = 1; |
1265 | is_nv = 1; |
680 | } |
1266 | } |
681 | |
1267 | |
682 | if (!is_nv) |
1268 | if (!is_nv) |
683 | { |
1269 | { |
684 | UV uv; |
1270 | int len = dec->cur - start; |
685 | int numtype = grok_number (start, dec->cur - start, &uv); |
1271 | |
686 | if (numtype & IS_NUMBER_IN_UV) |
1272 | // special case the rather common 1..5-digit-int case |
687 | if (numtype & IS_NUMBER_NEG) |
1273 | if (*start == '-') |
|
|
1274 | switch (len) |
688 | { |
1275 | { |
689 | if (uv < (UV)IV_MIN) |
1276 | case 2: return newSViv (-(IV)( start [1] - '0' * 1)); |
690 | return newSViv (-(IV)uv); |
1277 | case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11)); |
|
|
1278 | case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); |
|
|
1279 | case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); |
|
|
1280 | case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111)); |
691 | } |
1281 | } |
|
|
1282 | else |
|
|
1283 | switch (len) |
|
|
1284 | { |
|
|
1285 | case 1: return newSViv ( start [0] - '0' * 1); |
|
|
1286 | case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); |
|
|
1287 | case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); |
|
|
1288 | case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); |
|
|
1289 | case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111); |
|
|
1290 | } |
|
|
1291 | |
|
|
1292 | { |
|
|
1293 | UV uv; |
|
|
1294 | int numtype = grok_number (start, len, &uv); |
|
|
1295 | if (numtype & IS_NUMBER_IN_UV) |
|
|
1296 | if (numtype & IS_NUMBER_NEG) |
|
|
1297 | { |
|
|
1298 | if (uv < (UV)IV_MIN) |
|
|
1299 | return newSViv (-(IV)uv); |
|
|
1300 | } |
692 | else |
1301 | else |
693 | return newSVuv (uv); |
1302 | return newSVuv (uv); |
694 | } |
1303 | } |
695 | |
1304 | |
|
|
1305 | len -= *start == '-' ? 1 : 0; |
|
|
1306 | |
|
|
1307 | // does not fit into IV or UV, try NV |
|
|
1308 | if (len <= NV_DIG) |
|
|
1309 | // fits into NV without loss of precision |
|
|
1310 | return newSVnv (json_atof (start)); |
|
|
1311 | |
|
|
1312 | // everything else fails, convert it to a string |
|
|
1313 | return newSVpvn (start, dec->cur - start); |
|
|
1314 | } |
|
|
1315 | |
|
|
1316 | // loss of precision here |
696 | return newSVnv (Atof (start)); |
1317 | return newSVnv (json_atof (start)); |
697 | |
1318 | |
698 | fail: |
1319 | fail: |
699 | return 0; |
1320 | return 0; |
700 | } |
1321 | } |
701 | |
1322 | |
702 | static SV * |
1323 | static SV * |
703 | decode_av (dec_t *dec) |
1324 | decode_av (dec_t *dec) |
704 | { |
1325 | { |
705 | AV *av = newAV (); |
1326 | AV *av = newAV (); |
706 | |
1327 | |
707 | WS; |
1328 | DEC_INC_DEPTH; |
|
|
1329 | decode_ws (dec); |
|
|
1330 | |
708 | if (*dec->cur == ']') |
1331 | if (*dec->cur == ']') |
709 | ++dec->cur; |
1332 | ++dec->cur; |
710 | else |
1333 | else |
711 | for (;;) |
1334 | for (;;) |
712 | { |
1335 | { |
… | |
… | |
716 | if (!value) |
1339 | if (!value) |
717 | goto fail; |
1340 | goto fail; |
718 | |
1341 | |
719 | av_push (av, value); |
1342 | av_push (av, value); |
720 | |
1343 | |
721 | WS; |
1344 | decode_ws (dec); |
722 | |
1345 | |
723 | if (*dec->cur == ']') |
1346 | if (*dec->cur == ']') |
724 | { |
1347 | { |
725 | ++dec->cur; |
1348 | ++dec->cur; |
726 | break; |
1349 | break; |
727 | } |
1350 | } |
728 | |
1351 | |
729 | if (*dec->cur != ',') |
1352 | if (*dec->cur != ',') |
730 | ERR (", or ] expected while parsing array"); |
1353 | ERR (", or ] expected while parsing array"); |
731 | |
1354 | |
732 | ++dec->cur; |
1355 | ++dec->cur; |
|
|
1356 | |
|
|
1357 | decode_ws (dec); |
|
|
1358 | |
|
|
1359 | if (*dec->cur == ']' && dec->json.flags & F_RELAXED) |
|
|
1360 | { |
|
|
1361 | ++dec->cur; |
|
|
1362 | break; |
|
|
1363 | } |
733 | } |
1364 | } |
734 | |
1365 | |
|
|
1366 | DEC_DEC_DEPTH; |
735 | return newRV_noinc ((SV *)av); |
1367 | return newRV_noinc ((SV *)av); |
736 | |
1368 | |
737 | fail: |
1369 | fail: |
738 | SvREFCNT_dec (av); |
1370 | SvREFCNT_dec (av); |
|
|
1371 | DEC_DEC_DEPTH; |
739 | return 0; |
1372 | return 0; |
740 | } |
1373 | } |
741 | |
1374 | |
742 | static SV * |
1375 | static SV * |
743 | decode_hv (dec_t *dec) |
1376 | decode_hv (dec_t *dec) |
744 | { |
1377 | { |
|
|
1378 | SV *sv; |
745 | HV *hv = newHV (); |
1379 | HV *hv = newHV (); |
746 | |
1380 | |
747 | WS; |
1381 | DEC_INC_DEPTH; |
|
|
1382 | decode_ws (dec); |
|
|
1383 | |
748 | if (*dec->cur == '}') |
1384 | if (*dec->cur == '}') |
749 | ++dec->cur; |
1385 | ++dec->cur; |
750 | else |
1386 | else |
751 | for (;;) |
1387 | for (;;) |
752 | { |
1388 | { |
753 | SV *key, *value; |
|
|
754 | |
|
|
755 | WS; EXPECT_CH ('"'); |
1389 | EXPECT_CH ('"'); |
756 | |
1390 | |
757 | key = decode_str (dec); |
1391 | // heuristic: assume that |
758 | if (!key) |
1392 | // a) decode_str + hv_store_ent are abysmally slow. |
759 | goto fail; |
1393 | // b) most hash keys are short, simple ascii text. |
|
|
1394 | // => try to "fast-match" such strings to avoid |
|
|
1395 | // the overhead of decode_str + hv_store_ent. |
|
|
1396 | { |
|
|
1397 | SV *value; |
|
|
1398 | char *p = dec->cur; |
|
|
1399 | char *e = p + 24; // only try up to 24 bytes |
760 | |
1400 | |
761 | WS; EXPECT_CH (':'); |
1401 | for (;;) |
762 | |
|
|
763 | value = decode_sv (dec); |
|
|
764 | if (!value) |
|
|
765 | { |
1402 | { |
|
|
1403 | // the >= 0x80 is false on most architectures |
|
|
1404 | if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') |
|
|
1405 | { |
|
|
1406 | // slow path, back up and use decode_str |
|
|
1407 | SV *key = decode_str (dec); |
|
|
1408 | if (!key) |
|
|
1409 | goto fail; |
|
|
1410 | |
|
|
1411 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1412 | |
|
|
1413 | decode_ws (dec); |
|
|
1414 | value = decode_sv (dec); |
|
|
1415 | if (!value) |
|
|
1416 | { |
|
|
1417 | SvREFCNT_dec (key); |
|
|
1418 | goto fail; |
|
|
1419 | } |
|
|
1420 | |
|
|
1421 | hv_store_ent (hv, key, value, 0); |
766 | SvREFCNT_dec (key); |
1422 | SvREFCNT_dec (key); |
|
|
1423 | |
|
|
1424 | break; |
|
|
1425 | } |
|
|
1426 | else if (*p == '"') |
|
|
1427 | { |
|
|
1428 | // fast path, got a simple key |
|
|
1429 | char *key = dec->cur; |
|
|
1430 | int len = p - key; |
|
|
1431 | dec->cur = p + 1; |
|
|
1432 | |
|
|
1433 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1434 | |
|
|
1435 | decode_ws (dec); |
|
|
1436 | value = decode_sv (dec); |
|
|
1437 | if (!value) |
767 | goto fail; |
1438 | goto fail; |
|
|
1439 | |
|
|
1440 | hv_store (hv, key, len, value, 0); |
|
|
1441 | |
|
|
1442 | break; |
|
|
1443 | } |
|
|
1444 | |
|
|
1445 | ++p; |
768 | } |
1446 | } |
769 | |
|
|
770 | //TODO: optimise |
|
|
771 | hv_store_ent (hv, key, value, 0); |
|
|
772 | |
|
|
773 | WS; |
1447 | } |
|
|
1448 | |
|
|
1449 | decode_ws (dec); |
774 | |
1450 | |
775 | if (*dec->cur == '}') |
1451 | if (*dec->cur == '}') |
776 | { |
1452 | { |
777 | ++dec->cur; |
1453 | ++dec->cur; |
778 | break; |
1454 | break; |
… | |
… | |
780 | |
1456 | |
781 | if (*dec->cur != ',') |
1457 | if (*dec->cur != ',') |
782 | ERR (", or } expected while parsing object/hash"); |
1458 | ERR (", or } expected while parsing object/hash"); |
783 | |
1459 | |
784 | ++dec->cur; |
1460 | ++dec->cur; |
|
|
1461 | |
|
|
1462 | decode_ws (dec); |
|
|
1463 | |
|
|
1464 | if (*dec->cur == '}' && dec->json.flags & F_RELAXED) |
|
|
1465 | { |
|
|
1466 | ++dec->cur; |
|
|
1467 | break; |
|
|
1468 | } |
785 | } |
1469 | } |
786 | |
1470 | |
|
|
1471 | DEC_DEC_DEPTH; |
787 | return newRV_noinc ((SV *)hv); |
1472 | sv = newRV_noinc ((SV *)hv); |
|
|
1473 | |
|
|
1474 | // check filter callbacks |
|
|
1475 | if (dec->json.flags & F_HOOK) |
|
|
1476 | { |
|
|
1477 | if (dec->json.cb_sk_object && HvKEYS (hv) == 1) |
|
|
1478 | { |
|
|
1479 | HE *cb, *he; |
|
|
1480 | |
|
|
1481 | hv_iterinit (hv); |
|
|
1482 | he = hv_iternext (hv); |
|
|
1483 | hv_iterinit (hv); |
|
|
1484 | |
|
|
1485 | // the next line creates a mortal sv each time it's called. |
|
|
1486 | // might want to optimise this for common cases. |
|
|
1487 | cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0); |
|
|
1488 | |
|
|
1489 | if (cb) |
|
|
1490 | { |
|
|
1491 | dSP; |
|
|
1492 | int count; |
|
|
1493 | |
|
|
1494 | ENTER; SAVETMPS; |
|
|
1495 | SAVESTACK_POS (); |
|
|
1496 | PUSHMARK (SP); |
|
|
1497 | XPUSHs (HeVAL (he)); |
|
|
1498 | sv_2mortal (sv); |
|
|
1499 | |
|
|
1500 | PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN; |
|
|
1501 | |
|
|
1502 | if (count == 1) |
|
|
1503 | { |
|
|
1504 | sv = newSVsv (POPs); |
|
|
1505 | FREETMPS; LEAVE; |
|
|
1506 | return sv; |
|
|
1507 | } |
|
|
1508 | |
|
|
1509 | SvREFCNT_inc (sv); |
|
|
1510 | FREETMPS; LEAVE; |
|
|
1511 | } |
|
|
1512 | } |
|
|
1513 | |
|
|
1514 | if (dec->json.cb_object) |
|
|
1515 | { |
|
|
1516 | dSP; |
|
|
1517 | int count; |
|
|
1518 | |
|
|
1519 | ENTER; SAVETMPS; |
|
|
1520 | SAVESTACK_POS (); |
|
|
1521 | PUSHMARK (SP); |
|
|
1522 | XPUSHs (sv_2mortal (sv)); |
|
|
1523 | |
|
|
1524 | PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN; |
|
|
1525 | |
|
|
1526 | if (count == 1) |
|
|
1527 | { |
|
|
1528 | sv = newSVsv (POPs); |
|
|
1529 | FREETMPS; LEAVE; |
|
|
1530 | return sv; |
|
|
1531 | } |
|
|
1532 | |
|
|
1533 | SvREFCNT_inc (sv); |
|
|
1534 | FREETMPS; LEAVE; |
|
|
1535 | } |
|
|
1536 | } |
|
|
1537 | |
|
|
1538 | return sv; |
788 | |
1539 | |
789 | fail: |
1540 | fail: |
790 | SvREFCNT_dec (hv); |
1541 | SvREFCNT_dec (hv); |
|
|
1542 | DEC_DEC_DEPTH; |
|
|
1543 | return 0; |
|
|
1544 | } |
|
|
1545 | |
|
|
1546 | static SV * |
|
|
1547 | decode_tag (dec_t *dec) |
|
|
1548 | { |
|
|
1549 | SV *tag = 0; |
|
|
1550 | SV *val = 0; |
|
|
1551 | |
|
|
1552 | if (!(dec->json.flags & F_ALLOW_TAGS)) |
|
|
1553 | ERR ("malformed JSON string, neither array, object, number, string or atom"); |
|
|
1554 | |
|
|
1555 | ++dec->cur; |
|
|
1556 | |
|
|
1557 | decode_ws (dec); |
|
|
1558 | |
|
|
1559 | tag = decode_sv (dec); |
|
|
1560 | if (!tag) |
|
|
1561 | goto fail; |
|
|
1562 | |
|
|
1563 | if (!SvPOK (tag)) |
|
|
1564 | ERR ("malformed JSON string, (tag) must be a string"); |
|
|
1565 | |
|
|
1566 | decode_ws (dec); |
|
|
1567 | |
|
|
1568 | if (*dec->cur != ')') |
|
|
1569 | ERR (") expected after tag"); |
|
|
1570 | |
|
|
1571 | ++dec->cur; |
|
|
1572 | |
|
|
1573 | decode_ws (dec); |
|
|
1574 | |
|
|
1575 | val = decode_sv (dec); |
|
|
1576 | if (!val) |
|
|
1577 | goto fail; |
|
|
1578 | |
|
|
1579 | if (!SvROK (val) || SvTYPE (SvRV (val)) != SVt_PVAV) |
|
|
1580 | ERR ("malformed JSON string, tag value must be an array"); |
|
|
1581 | |
|
|
1582 | { |
|
|
1583 | AV *av = (AV *)SvRV (val); |
|
|
1584 | int i, len = av_len (av) + 1; |
|
|
1585 | HV *stash = gv_stashsv (tag, 0); |
|
|
1586 | SV *sv; |
|
|
1587 | |
|
|
1588 | if (!stash) |
|
|
1589 | ERR ("cannot decode perl-object (package does not exist)"); |
|
|
1590 | |
|
|
1591 | GV *method = gv_fetchmethod_autoload (stash, "THAW", 0); |
|
|
1592 | |
|
|
1593 | if (!method) |
|
|
1594 | ERR ("cannot decode perl-object (package does not have a THAW method)"); |
|
|
1595 | |
|
|
1596 | dSP; |
|
|
1597 | |
|
|
1598 | ENTER; SAVETMPS; |
|
|
1599 | PUSHMARK (SP); |
|
|
1600 | EXTEND (SP, len + 2); |
|
|
1601 | // we re-bless the reference to get overload and other niceties right |
|
|
1602 | PUSHs (tag); |
|
|
1603 | PUSHs (sv_json); |
|
|
1604 | |
|
|
1605 | for (i = 0; i < len; ++i) |
|
|
1606 | PUSHs (*av_fetch (av, i, 1)); |
|
|
1607 | |
|
|
1608 | PUTBACK; |
|
|
1609 | call_sv ((SV *)GvCV (method), G_SCALAR); |
|
|
1610 | SPAGAIN; |
|
|
1611 | |
|
|
1612 | SvREFCNT_dec (tag); |
|
|
1613 | SvREFCNT_dec (val); |
|
|
1614 | sv = SvREFCNT_inc (POPs); |
|
|
1615 | |
|
|
1616 | PUTBACK; |
|
|
1617 | |
|
|
1618 | FREETMPS; LEAVE; |
|
|
1619 | |
|
|
1620 | return sv; |
|
|
1621 | } |
|
|
1622 | |
|
|
1623 | fail: |
|
|
1624 | SvREFCNT_dec (tag); |
|
|
1625 | SvREFCNT_dec (val); |
791 | return 0; |
1626 | return 0; |
792 | } |
1627 | } |
793 | |
1628 | |
794 | static SV * |
1629 | static SV * |
795 | decode_sv (dec_t *dec) |
1630 | decode_sv (dec_t *dec) |
796 | { |
1631 | { |
797 | WS; |
1632 | // the beauty of JSON: you need exactly one character lookahead |
|
|
1633 | // to parse everything. |
798 | switch (*dec->cur) |
1634 | switch (*dec->cur) |
799 | { |
1635 | { |
800 | case '"': ++dec->cur; return decode_str (dec); |
1636 | case '"': ++dec->cur; return decode_str (dec); |
801 | case '[': ++dec->cur; return decode_av (dec); |
1637 | case '[': ++dec->cur; return decode_av (dec); |
802 | case '{': ++dec->cur; return decode_hv (dec); |
1638 | case '{': ++dec->cur; return decode_hv (dec); |
|
|
1639 | case '(': return decode_tag (dec); |
803 | |
1640 | |
804 | case '-': |
1641 | case '-': |
805 | case '0': case '1': case '2': case '3': case '4': |
1642 | case '0': case '1': case '2': case '3': case '4': |
806 | case '5': case '6': case '7': case '8': case '9': |
1643 | case '5': case '6': case '7': case '8': case '9': |
807 | return decode_num (dec); |
1644 | return decode_num (dec); |
808 | |
1645 | |
809 | case 't': |
1646 | case 't': |
810 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
1647 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
811 | { |
1648 | { |
812 | dec->cur += 4; |
1649 | dec->cur += 4; |
|
|
1650 | #if JSON_SLOW |
|
|
1651 | bool_true = get_bool ("Types::Serialiser::true"); |
|
|
1652 | #endif |
813 | return newSViv (1); |
1653 | return newSVsv (bool_true); |
814 | } |
1654 | } |
815 | else |
1655 | else |
816 | ERR ("'true' expected"); |
1656 | ERR ("'true' expected"); |
817 | |
1657 | |
818 | break; |
1658 | break; |
819 | |
1659 | |
820 | case 'f': |
1660 | case 'f': |
821 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
1661 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
822 | { |
1662 | { |
823 | dec->cur += 5; |
1663 | dec->cur += 5; |
|
|
1664 | #if JSON_SLOW |
|
|
1665 | bool_false = get_bool ("Types::Serialiser::false"); |
|
|
1666 | #endif |
824 | return newSViv (0); |
1667 | return newSVsv (bool_false); |
825 | } |
1668 | } |
826 | else |
1669 | else |
827 | ERR ("'false' expected"); |
1670 | ERR ("'false' expected"); |
828 | |
1671 | |
829 | break; |
1672 | break; |
… | |
… | |
838 | ERR ("'null' expected"); |
1681 | ERR ("'null' expected"); |
839 | |
1682 | |
840 | break; |
1683 | break; |
841 | |
1684 | |
842 | default: |
1685 | default: |
843 | ERR ("malformed json string"); |
1686 | ERR ("malformed JSON string, neither tag, array, object, number, string or atom"); |
844 | break; |
1687 | break; |
845 | } |
1688 | } |
846 | |
1689 | |
847 | fail: |
1690 | fail: |
848 | return 0; |
1691 | return 0; |
849 | } |
1692 | } |
850 | |
1693 | |
851 | static SV * |
1694 | static SV * |
852 | decode_json (SV *string, UV flags) |
1695 | decode_json (SV *string, JSON *json, STRLEN *offset_return) |
853 | { |
1696 | { |
|
|
1697 | dec_t dec; |
854 | SV *sv; |
1698 | SV *sv; |
855 | |
1699 | |
856 | if (flags & F_UTF8) |
1700 | /* work around bugs in 5.10 where manipulating magic values |
|
|
1701 | * makes perl ignore the magic in subsequent accesses. |
|
|
1702 | * also make a copy of non-PV values, to get them into a clean |
|
|
1703 | * state (SvPV should do that, but it's buggy, see below). |
|
|
1704 | * |
|
|
1705 | * SvIsCOW_shared_hash works around a bug in perl (possibly 5.16), |
|
|
1706 | * as reported by Reini Urban. |
|
|
1707 | */ |
|
|
1708 | /*SvGETMAGIC (string);*/ |
|
|
1709 | if (SvMAGICAL (string) || !SvPOK (string) || SvIsCOW_shared_hash (string)) |
|
|
1710 | string = sv_2mortal (newSVsv (string)); |
|
|
1711 | |
|
|
1712 | SvUPGRADE (string, SVt_PV); |
|
|
1713 | |
|
|
1714 | /* work around a bug in perl 5.10, which causes SvCUR to fail an |
|
|
1715 | * assertion with -DDEBUGGING, although SvCUR is documented to |
|
|
1716 | * return the xpv_cur field which certainly exists after upgrading. |
|
|
1717 | * according to nicholas clark, calling SvPOK fixes this. |
|
|
1718 | * But it doesn't fix it, so try another workaround, call SvPV_nolen |
|
|
1719 | * and hope for the best. |
|
|
1720 | * Damnit, SvPV_nolen still trips over yet another assertion. This |
|
|
1721 | * assertion business is seriously broken, try yet another workaround |
|
|
1722 | * for the broken -DDEBUGGING. |
|
|
1723 | */ |
|
|
1724 | { |
|
|
1725 | #ifdef DEBUGGING |
|
|
1726 | STRLEN offset = SvOK (string) ? sv_len (string) : 0; |
|
|
1727 | #else |
|
|
1728 | STRLEN offset = SvCUR (string); |
|
|
1729 | #endif |
|
|
1730 | |
|
|
1731 | if (offset > json->max_size && json->max_size) |
|
|
1732 | croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", |
|
|
1733 | (unsigned long)SvCUR (string), (unsigned long)json->max_size); |
|
|
1734 | } |
|
|
1735 | |
|
|
1736 | if (DECODE_WANTS_OCTETS (json)) |
857 | sv_utf8_downgrade (string, 0); |
1737 | sv_utf8_downgrade (string, 0); |
858 | else |
1738 | else |
859 | sv_utf8_upgrade (string); |
1739 | sv_utf8_upgrade (string); |
860 | |
1740 | |
861 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
1741 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
862 | |
1742 | |
863 | dec_t dec; |
1743 | dec.json = *json; |
864 | dec.flags = flags; |
|
|
865 | dec.cur = SvPVX (string); |
1744 | dec.cur = SvPVX (string); |
866 | dec.end = SvEND (string); |
1745 | dec.end = SvEND (string); |
867 | dec.err = 0; |
1746 | dec.err = 0; |
|
|
1747 | dec.depth = 0; |
868 | |
1748 | |
|
|
1749 | if (dec.json.cb_object || dec.json.cb_sk_object) |
|
|
1750 | dec.json.flags |= F_HOOK; |
|
|
1751 | |
|
|
1752 | *dec.end = 0; // this should basically be a nop, too, but make sure it's there |
|
|
1753 | |
|
|
1754 | decode_ws (&dec); |
869 | sv = decode_sv (&dec); |
1755 | sv = decode_sv (&dec); |
870 | |
1756 | |
|
|
1757 | if (offset_return) |
|
|
1758 | *offset_return = dec.cur - SvPVX (string); |
|
|
1759 | else if (sv) |
|
|
1760 | { |
|
|
1761 | // check for trailing garbage |
|
|
1762 | decode_ws (&dec); |
|
|
1763 | |
|
|
1764 | if (*dec.cur) |
|
|
1765 | { |
|
|
1766 | dec.err = "garbage after JSON object"; |
|
|
1767 | SvREFCNT_dec (sv); |
|
|
1768 | sv = 0; |
|
|
1769 | } |
|
|
1770 | } |
|
|
1771 | |
871 | if (!sv) |
1772 | if (!sv) |
872 | { |
1773 | { |
873 | IV offset = utf8_distance (dec.cur, SvPVX (string)); |
|
|
874 | SV *uni = sv_newmortal (); |
1774 | SV *uni = sv_newmortal (); |
|
|
1775 | |
875 | // horrible hack to silence warning inside pv_uni_display |
1776 | // horrible hack to silence warning inside pv_uni_display |
876 | COP cop; |
1777 | COP cop = *PL_curcop; |
877 | memset (&cop, 0, sizeof (cop)); |
|
|
878 | cop.cop_warnings = pWARN_NONE; |
1778 | cop.cop_warnings = pWARN_NONE; |
|
|
1779 | ENTER; |
879 | SAVEVPTR (PL_curcop); |
1780 | SAVEVPTR (PL_curcop); |
880 | PL_curcop = &cop; |
1781 | PL_curcop = &cop; |
881 | |
|
|
882 | pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
1782 | pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
|
|
1783 | LEAVE; |
|
|
1784 | |
883 | croak ("%s, at character offset %d (%s)", |
1785 | croak ("%s, at character offset %d (before \"%s\")", |
884 | dec.err, |
1786 | dec.err, |
885 | (int)offset, |
1787 | (int)ptr_to_index (string, dec.cur), |
886 | dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
1788 | dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
887 | } |
1789 | } |
888 | |
1790 | |
889 | sv = sv_2mortal (sv); |
1791 | sv = sv_2mortal (sv); |
890 | |
1792 | |
891 | if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) |
1793 | if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv)) |
892 | croak ("JSON object or array expected (but number, string, true, false or null found, use allow_nonref to allow this)"); |
1794 | croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); |
893 | |
1795 | |
894 | return sv; |
1796 | return sv; |
895 | } |
1797 | } |
896 | |
1798 | |
|
|
1799 | ///////////////////////////////////////////////////////////////////////////// |
|
|
1800 | // incremental parser |
|
|
1801 | |
|
|
1802 | static void |
|
|
1803 | incr_parse (JSON *self) |
|
|
1804 | { |
|
|
1805 | const char *p = SvPVX (self->incr_text) + self->incr_pos; |
|
|
1806 | |
|
|
1807 | // the state machine here is a bit convoluted and could be simplified a lot |
|
|
1808 | // but this would make it slower, so... |
|
|
1809 | |
|
|
1810 | for (;;) |
|
|
1811 | { |
|
|
1812 | //printf ("loop pod %d *p<%c><%s>, mode %d nest %d\n", p - SvPVX (self->incr_text), *p, p, self->incr_mode, self->incr_nest);//D |
|
|
1813 | switch (self->incr_mode) |
|
|
1814 | { |
|
|
1815 | // only used for initial whitespace skipping |
|
|
1816 | case INCR_M_WS: |
|
|
1817 | for (;;) |
|
|
1818 | { |
|
|
1819 | if (*p > 0x20) |
|
|
1820 | { |
|
|
1821 | if (*p == '#') |
|
|
1822 | { |
|
|
1823 | self->incr_mode = INCR_M_C0; |
|
|
1824 | goto incr_m_c; |
|
|
1825 | } |
|
|
1826 | else |
|
|
1827 | { |
|
|
1828 | self->incr_mode = INCR_M_JSON; |
|
|
1829 | goto incr_m_json; |
|
|
1830 | } |
|
|
1831 | } |
|
|
1832 | else if (!*p) |
|
|
1833 | goto interrupt; |
|
|
1834 | |
|
|
1835 | ++p; |
|
|
1836 | } |
|
|
1837 | |
|
|
1838 | // skip a single char inside a string (for \\-processing) |
|
|
1839 | case INCR_M_BS: |
|
|
1840 | if (!*p) |
|
|
1841 | goto interrupt; |
|
|
1842 | |
|
|
1843 | ++p; |
|
|
1844 | self->incr_mode = INCR_M_STR; |
|
|
1845 | goto incr_m_str; |
|
|
1846 | |
|
|
1847 | // inside #-style comments |
|
|
1848 | case INCR_M_C0: |
|
|
1849 | case INCR_M_C1: |
|
|
1850 | incr_m_c: |
|
|
1851 | for (;;) |
|
|
1852 | { |
|
|
1853 | if (*p == '\n') |
|
|
1854 | { |
|
|
1855 | self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON; |
|
|
1856 | break; |
|
|
1857 | } |
|
|
1858 | else if (!*p) |
|
|
1859 | goto interrupt; |
|
|
1860 | |
|
|
1861 | ++p; |
|
|
1862 | } |
|
|
1863 | |
|
|
1864 | break; |
|
|
1865 | |
|
|
1866 | // inside a string |
|
|
1867 | case INCR_M_STR: |
|
|
1868 | incr_m_str: |
|
|
1869 | for (;;) |
|
|
1870 | { |
|
|
1871 | if (*p == '"') |
|
|
1872 | { |
|
|
1873 | ++p; |
|
|
1874 | self->incr_mode = INCR_M_JSON; |
|
|
1875 | |
|
|
1876 | if (!self->incr_nest) |
|
|
1877 | goto interrupt; |
|
|
1878 | |
|
|
1879 | goto incr_m_json; |
|
|
1880 | } |
|
|
1881 | else if (*p == '\\') |
|
|
1882 | { |
|
|
1883 | ++p; // "virtually" consumes character after \ |
|
|
1884 | |
|
|
1885 | if (!*p) // if at end of string we have to switch modes |
|
|
1886 | { |
|
|
1887 | self->incr_mode = INCR_M_BS; |
|
|
1888 | goto interrupt; |
|
|
1889 | } |
|
|
1890 | } |
|
|
1891 | else if (!*p) |
|
|
1892 | goto interrupt; |
|
|
1893 | |
|
|
1894 | ++p; |
|
|
1895 | } |
|
|
1896 | |
|
|
1897 | // after initial ws, outside string |
|
|
1898 | case INCR_M_JSON: |
|
|
1899 | incr_m_json: |
|
|
1900 | for (;;) |
|
|
1901 | { |
|
|
1902 | switch (*p++) |
|
|
1903 | { |
|
|
1904 | case 0: |
|
|
1905 | --p; |
|
|
1906 | goto interrupt; |
|
|
1907 | |
|
|
1908 | case 0x09: |
|
|
1909 | case 0x0a: |
|
|
1910 | case 0x0d: |
|
|
1911 | case 0x20: |
|
|
1912 | if (!self->incr_nest) |
|
|
1913 | { |
|
|
1914 | --p; // do not eat the whitespace, let the next round do it |
|
|
1915 | goto interrupt; |
|
|
1916 | } |
|
|
1917 | break; |
|
|
1918 | |
|
|
1919 | case '"': |
|
|
1920 | self->incr_mode = INCR_M_STR; |
|
|
1921 | goto incr_m_str; |
|
|
1922 | |
|
|
1923 | case '[': |
|
|
1924 | case '{': |
|
|
1925 | case '(': |
|
|
1926 | if (++self->incr_nest > self->max_depth) |
|
|
1927 | croak (ERR_NESTING_EXCEEDED); |
|
|
1928 | break; |
|
|
1929 | |
|
|
1930 | case ']': |
|
|
1931 | case '}': |
|
|
1932 | if (--self->incr_nest <= 0) |
|
|
1933 | goto interrupt; |
|
|
1934 | break; |
|
|
1935 | |
|
|
1936 | case ')': |
|
|
1937 | --self->incr_nest; |
|
|
1938 | break; |
|
|
1939 | |
|
|
1940 | case '#': |
|
|
1941 | self->incr_mode = INCR_M_C1; |
|
|
1942 | goto incr_m_c; |
|
|
1943 | } |
|
|
1944 | } |
|
|
1945 | } |
|
|
1946 | |
|
|
1947 | modechange: |
|
|
1948 | ; |
|
|
1949 | } |
|
|
1950 | |
|
|
1951 | interrupt: |
|
|
1952 | self->incr_pos = p - SvPVX (self->incr_text); |
|
|
1953 | //printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D |
|
|
1954 | //printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D |
|
|
1955 | } |
|
|
1956 | |
|
|
1957 | ///////////////////////////////////////////////////////////////////////////// |
|
|
1958 | // XS interface functions |
|
|
1959 | |
897 | MODULE = JSON::XS PACKAGE = JSON::XS |
1960 | MODULE = JSON::XS PACKAGE = JSON::XS |
898 | |
1961 | |
899 | BOOT: |
1962 | BOOT: |
900 | { |
1963 | { |
901 | int i; |
1964 | int i; |
902 | |
1965 | |
903 | memset (decode_hexdigit, 0xff, 256); |
|
|
904 | for (i = 10; i--; ) |
1966 | for (i = 0; i < 256; ++i) |
905 | decode_hexdigit ['0' + i] = i; |
1967 | decode_hexdigit [i] = |
|
|
1968 | i >= '0' && i <= '9' ? i - '0' |
|
|
1969 | : i >= 'a' && i <= 'f' ? i - 'a' + 10 |
|
|
1970 | : i >= 'A' && i <= 'F' ? i - 'A' + 10 |
|
|
1971 | : -1; |
906 | |
1972 | |
907 | for (i = 7; i--; ) |
|
|
908 | { |
|
|
909 | decode_hexdigit ['a' + i] = 10 + i; |
|
|
910 | decode_hexdigit ['A' + i] = 10 + i; |
|
|
911 | } |
|
|
912 | |
|
|
913 | json_stash = gv_stashpv ("JSON::XS", 1); |
1973 | json_stash = gv_stashpv ("JSON::XS" , 1); |
|
|
1974 | bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1); |
|
|
1975 | bool_true = get_bool ("Types::Serialiser::true"); |
|
|
1976 | bool_false = get_bool ("Types::Serialiser::false"); |
|
|
1977 | |
|
|
1978 | sv_json = newSVpv ("JSON", 0); |
|
|
1979 | SvREADONLY_on (sv_json); |
|
|
1980 | |
|
|
1981 | CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */ |
914 | } |
1982 | } |
915 | |
1983 | |
916 | PROTOTYPES: DISABLE |
1984 | PROTOTYPES: DISABLE |
917 | |
1985 | |
918 | SV *new (char *dummy) |
1986 | void CLONE (...) |
919 | CODE: |
1987 | CODE: |
920 | RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); |
1988 | json_stash = 0; |
|
|
1989 | bool_stash = 0; |
|
|
1990 | |
|
|
1991 | void new (char *klass) |
|
|
1992 | PPCODE: |
|
|
1993 | { |
|
|
1994 | SV *pv = NEWSV (0, sizeof (JSON)); |
|
|
1995 | SvPOK_only (pv); |
|
|
1996 | json_init ((JSON *)SvPVX (pv)); |
|
|
1997 | XPUSHs (sv_2mortal (sv_bless ( |
|
|
1998 | newRV_noinc (pv), |
|
|
1999 | strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1) |
|
|
2000 | ))); |
|
|
2001 | } |
|
|
2002 | |
|
|
2003 | void ascii (JSON *self, int enable = 1) |
|
|
2004 | ALIAS: |
|
|
2005 | ascii = F_ASCII |
|
|
2006 | latin1 = F_LATIN1 |
|
|
2007 | utf8 = F_UTF8 |
|
|
2008 | indent = F_INDENT |
|
|
2009 | canonical = F_CANONICAL |
|
|
2010 | space_before = F_SPACE_BEFORE |
|
|
2011 | space_after = F_SPACE_AFTER |
|
|
2012 | pretty = F_PRETTY |
|
|
2013 | allow_nonref = F_ALLOW_NONREF |
|
|
2014 | shrink = F_SHRINK |
|
|
2015 | allow_blessed = F_ALLOW_BLESSED |
|
|
2016 | convert_blessed = F_CONV_BLESSED |
|
|
2017 | relaxed = F_RELAXED |
|
|
2018 | allow_unknown = F_ALLOW_UNKNOWN |
|
|
2019 | allow_tags = F_ALLOW_TAGS |
|
|
2020 | PPCODE: |
|
|
2021 | { |
|
|
2022 | if (enable) |
|
|
2023 | self->flags |= ix; |
|
|
2024 | else |
|
|
2025 | self->flags &= ~ix; |
|
|
2026 | |
|
|
2027 | XPUSHs (ST (0)); |
|
|
2028 | } |
|
|
2029 | |
|
|
2030 | void get_ascii (JSON *self) |
|
|
2031 | ALIAS: |
|
|
2032 | get_ascii = F_ASCII |
|
|
2033 | get_latin1 = F_LATIN1 |
|
|
2034 | get_utf8 = F_UTF8 |
|
|
2035 | get_indent = F_INDENT |
|
|
2036 | get_canonical = F_CANONICAL |
|
|
2037 | get_space_before = F_SPACE_BEFORE |
|
|
2038 | get_space_after = F_SPACE_AFTER |
|
|
2039 | get_allow_nonref = F_ALLOW_NONREF |
|
|
2040 | get_shrink = F_SHRINK |
|
|
2041 | get_allow_blessed = F_ALLOW_BLESSED |
|
|
2042 | get_convert_blessed = F_CONV_BLESSED |
|
|
2043 | get_relaxed = F_RELAXED |
|
|
2044 | get_allow_unknown = F_ALLOW_UNKNOWN |
|
|
2045 | get_allow_tags = F_ALLOW_TAGS |
|
|
2046 | PPCODE: |
|
|
2047 | XPUSHs (boolSV (self->flags & ix)); |
|
|
2048 | |
|
|
2049 | void max_depth (JSON *self, U32 max_depth = 0x80000000UL) |
|
|
2050 | PPCODE: |
|
|
2051 | self->max_depth = max_depth; |
|
|
2052 | XPUSHs (ST (0)); |
|
|
2053 | |
|
|
2054 | U32 get_max_depth (JSON *self) |
|
|
2055 | CODE: |
|
|
2056 | RETVAL = self->max_depth; |
921 | OUTPUT: |
2057 | OUTPUT: |
922 | RETVAL |
2058 | RETVAL |
923 | |
2059 | |
924 | SV *ascii (SV *self, int enable = 1) |
2060 | void max_size (JSON *self, U32 max_size = 0) |
925 | ALIAS: |
2061 | PPCODE: |
926 | ascii = F_ASCII |
2062 | self->max_size = max_size; |
927 | utf8 = F_UTF8 |
2063 | XPUSHs (ST (0)); |
928 | indent = F_INDENT |
2064 | |
929 | canonical = F_CANONICAL |
2065 | int get_max_size (JSON *self) |
930 | space_before = F_SPACE_BEFORE |
|
|
931 | space_after = F_SPACE_AFTER |
|
|
932 | json_rpc = F_JSON_RPC |
|
|
933 | pretty = F_PRETTY |
|
|
934 | allow_nonref = F_ALLOW_NONREF |
|
|
935 | shrink = F_SHRINK |
|
|
936 | CODE: |
2066 | CODE: |
937 | { |
2067 | RETVAL = self->max_size; |
938 | UV *uv = SvJSON (self); |
|
|
939 | if (enable) |
|
|
940 | *uv |= ix; |
|
|
941 | else |
|
|
942 | *uv &= ~ix; |
|
|
943 | |
|
|
944 | RETVAL = newSVsv (self); |
|
|
945 | } |
|
|
946 | OUTPUT: |
2068 | OUTPUT: |
947 | RETVAL |
2069 | RETVAL |
948 | |
2070 | |
949 | void encode (SV *self, SV *scalar) |
2071 | void filter_json_object (JSON *self, SV *cb = &PL_sv_undef) |
950 | PPCODE: |
2072 | PPCODE: |
951 | XPUSHs (encode_json (scalar, *SvJSON (self))); |
2073 | { |
|
|
2074 | SvREFCNT_dec (self->cb_object); |
|
|
2075 | self->cb_object = SvOK (cb) ? newSVsv (cb) : 0; |
952 | |
2076 | |
953 | void decode (SV *self, SV *jsonstr) |
2077 | XPUSHs (ST (0)); |
|
|
2078 | } |
|
|
2079 | |
|
|
2080 | void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef) |
954 | PPCODE: |
2081 | PPCODE: |
955 | XPUSHs (decode_json (jsonstr, *SvJSON (self))); |
2082 | { |
|
|
2083 | if (!self->cb_sk_object) |
|
|
2084 | self->cb_sk_object = newHV (); |
|
|
2085 | |
|
|
2086 | if (SvOK (cb)) |
|
|
2087 | hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0); |
|
|
2088 | else |
|
|
2089 | { |
|
|
2090 | hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0); |
|
|
2091 | |
|
|
2092 | if (!HvKEYS (self->cb_sk_object)) |
|
|
2093 | { |
|
|
2094 | SvREFCNT_dec (self->cb_sk_object); |
|
|
2095 | self->cb_sk_object = 0; |
|
|
2096 | } |
|
|
2097 | } |
|
|
2098 | |
|
|
2099 | XPUSHs (ST (0)); |
|
|
2100 | } |
|
|
2101 | |
|
|
2102 | void encode (JSON *self, SV *scalar) |
|
|
2103 | PPCODE: |
|
|
2104 | PUTBACK; scalar = encode_json (scalar, self); SPAGAIN; |
|
|
2105 | XPUSHs (scalar); |
|
|
2106 | |
|
|
2107 | void decode (JSON *self, SV *jsonstr) |
|
|
2108 | PPCODE: |
|
|
2109 | PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN; |
|
|
2110 | XPUSHs (jsonstr); |
|
|
2111 | |
|
|
2112 | void decode_prefix (JSON *self, SV *jsonstr) |
|
|
2113 | PPCODE: |
|
|
2114 | { |
|
|
2115 | SV *sv; |
|
|
2116 | STRLEN offset; |
|
|
2117 | PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN; |
|
|
2118 | EXTEND (SP, 2); |
|
|
2119 | PUSHs (sv); |
|
|
2120 | PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, SvPV_nolen (jsonstr) + offset)))); |
|
|
2121 | } |
|
|
2122 | |
|
|
2123 | void incr_parse (JSON *self, SV *jsonstr = 0) |
|
|
2124 | PPCODE: |
|
|
2125 | { |
|
|
2126 | if (!self->incr_text) |
|
|
2127 | self->incr_text = newSVpvn ("", 0); |
|
|
2128 | |
|
|
2129 | /* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */ |
|
|
2130 | if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text)) |
|
|
2131 | if (DECODE_WANTS_OCTETS (self)) |
|
|
2132 | { |
|
|
2133 | if (self->incr_pos) |
|
|
2134 | self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text), |
|
|
2135 | (U8 *)SvPVX (self->incr_text) + self->incr_pos); |
|
|
2136 | |
|
|
2137 | sv_utf8_downgrade (self->incr_text, 0); |
|
|
2138 | } |
|
|
2139 | else |
|
|
2140 | { |
|
|
2141 | sv_utf8_upgrade (self->incr_text); |
|
|
2142 | |
|
|
2143 | if (self->incr_pos) |
|
|
2144 | self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos) |
|
|
2145 | - (U8 *)SvPVX (self->incr_text); |
|
|
2146 | } |
|
|
2147 | |
|
|
2148 | // append data, if any |
|
|
2149 | if (jsonstr) |
|
|
2150 | { |
|
|
2151 | /* make sure both strings have same encoding */ |
|
|
2152 | if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text)) |
|
|
2153 | if (SvUTF8 (jsonstr)) |
|
|
2154 | sv_utf8_downgrade (jsonstr, 0); |
|
|
2155 | else |
|
|
2156 | sv_utf8_upgrade (jsonstr); |
|
|
2157 | |
|
|
2158 | /* and then just blindly append */ |
|
|
2159 | { |
|
|
2160 | STRLEN len; |
|
|
2161 | const char *str = SvPV (jsonstr, len); |
|
|
2162 | STRLEN cur = SvCUR (self->incr_text); |
|
|
2163 | |
|
|
2164 | if (SvLEN (self->incr_text) <= cur + len) |
|
|
2165 | SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
|
|
2166 | |
|
|
2167 | Move (str, SvEND (self->incr_text), len, char); |
|
|
2168 | SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len); |
|
|
2169 | *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there |
|
|
2170 | } |
|
|
2171 | } |
|
|
2172 | |
|
|
2173 | if (GIMME_V != G_VOID) |
|
|
2174 | do |
|
|
2175 | { |
|
|
2176 | SV *sv; |
|
|
2177 | STRLEN offset; |
|
|
2178 | |
|
|
2179 | if (!INCR_DONE (self)) |
|
|
2180 | { |
|
|
2181 | incr_parse (self); |
|
|
2182 | |
|
|
2183 | if (self->incr_pos > self->max_size && self->max_size) |
|
|
2184 | croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", |
|
|
2185 | (unsigned long)self->incr_pos, (unsigned long)self->max_size); |
|
|
2186 | |
|
|
2187 | if (!INCR_DONE (self)) |
|
|
2188 | { |
|
|
2189 | // as an optimisation, do not accumulate white space in the incr buffer |
|
|
2190 | if (self->incr_mode == INCR_M_WS && self->incr_pos) |
|
|
2191 | { |
|
|
2192 | self->incr_pos = 0; |
|
|
2193 | SvCUR_set (self->incr_text, 0); |
|
|
2194 | } |
|
|
2195 | |
|
|
2196 | break; |
|
|
2197 | } |
|
|
2198 | } |
|
|
2199 | |
|
|
2200 | PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN; |
|
|
2201 | XPUSHs (sv); |
|
|
2202 | |
|
|
2203 | self->incr_pos -= offset; |
|
|
2204 | self->incr_nest = 0; |
|
|
2205 | self->incr_mode = 0; |
|
|
2206 | |
|
|
2207 | sv_chop (self->incr_text, SvPVX (self->incr_text) + offset); |
|
|
2208 | } |
|
|
2209 | while (GIMME_V == G_ARRAY); |
|
|
2210 | } |
|
|
2211 | |
|
|
2212 | SV *incr_text (JSON *self) |
|
|
2213 | ATTRS: lvalue |
|
|
2214 | CODE: |
|
|
2215 | { |
|
|
2216 | if (self->incr_pos) |
|
|
2217 | croak ("incr_text can not be called when the incremental parser already started parsing"); |
|
|
2218 | |
|
|
2219 | RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef; |
|
|
2220 | } |
|
|
2221 | OUTPUT: |
|
|
2222 | RETVAL |
|
|
2223 | |
|
|
2224 | void incr_skip (JSON *self) |
|
|
2225 | CODE: |
|
|
2226 | { |
|
|
2227 | if (self->incr_pos) |
|
|
2228 | { |
|
|
2229 | sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos); |
|
|
2230 | self->incr_pos = 0; |
|
|
2231 | self->incr_nest = 0; |
|
|
2232 | self->incr_mode = 0; |
|
|
2233 | } |
|
|
2234 | } |
|
|
2235 | |
|
|
2236 | void incr_reset (JSON *self) |
|
|
2237 | CODE: |
|
|
2238 | { |
|
|
2239 | SvREFCNT_dec (self->incr_text); |
|
|
2240 | self->incr_text = 0; |
|
|
2241 | self->incr_pos = 0; |
|
|
2242 | self->incr_nest = 0; |
|
|
2243 | self->incr_mode = 0; |
|
|
2244 | } |
|
|
2245 | |
|
|
2246 | void DESTROY (JSON *self) |
|
|
2247 | CODE: |
|
|
2248 | SvREFCNT_dec (self->cb_sk_object); |
|
|
2249 | SvREFCNT_dec (self->cb_object); |
|
|
2250 | SvREFCNT_dec (self->incr_text); |
956 | |
2251 | |
957 | PROTOTYPES: ENABLE |
2252 | PROTOTYPES: ENABLE |
958 | |
2253 | |
959 | void to_json (SV *scalar) |
2254 | void encode_json (SV *scalar) |
960 | PPCODE: |
2255 | PPCODE: |
961 | XPUSHs (encode_json (scalar, F_UTF8)); |
2256 | { |
|
|
2257 | JSON json; |
|
|
2258 | json_init (&json); |
|
|
2259 | json.flags |= F_UTF8; |
|
|
2260 | PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN; |
|
|
2261 | XPUSHs (scalar); |
|
|
2262 | } |
962 | |
2263 | |
963 | void from_json (SV *jsonstr) |
2264 | void decode_json (SV *jsonstr) |
964 | PPCODE: |
2265 | PPCODE: |
965 | XPUSHs (decode_json (jsonstr, F_UTF8)); |
2266 | { |
|
|
2267 | JSON json; |
|
|
2268 | json_init (&json); |
|
|
2269 | json.flags |= F_UTF8; |
|
|
2270 | PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN; |
|
|
2271 | XPUSHs (jsonstr); |
|
|
2272 | } |
966 | |
2273 | |