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33 | extern int buf_overflow (const char *buf1, const char *buf2, int bufsize); |
33 | extern int buf_overflow (const char *buf1, const char *buf2, int bufsize); |
34 | |
34 | |
35 | template<int size> |
35 | template<int size> |
36 | struct shstr_vec |
36 | struct shstr_vec |
37 | { |
37 | { |
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38 | uint32_t hash; |
38 | uint32_t len; |
39 | uint32_t len; |
39 | uint32_t refcnt; |
40 | uint32_t refcnt; |
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41 | // pointer points here |
40 | char string[size]; |
42 | char string [size]; |
41 | }; |
43 | }; |
42 | |
44 | |
43 | // this class is a non-refcounted shared string |
45 | // this class is a non-refcounted shared string |
44 | // it cannot be used to create or store shared strings, but |
46 | // it cannot be used to create or store shared strings, but |
45 | // it can be used to apss shared strings around, i.e. as function arguments |
47 | // it can be used to pass shared strings around, i.e. as function arguments |
46 | // or return values. their lifetime must not span a gc () call, i.e. |
48 | // or return values. their lifetime must not span a gc () call, i.e. |
47 | // they are only valid as temporary values within the same server tick. |
49 | // they are only valid as temporary values within the same server tick. |
48 | struct shstr_tmp |
50 | struct shstr_tmp |
49 | { |
51 | { |
50 | static shstr_vec<sizeof ("(null)")> nullvec; |
52 | static shstr_vec<sizeof ("(null)")> nullvec; |
51 | static const char *null () { return nullvec.string; } // this is the null pointer value |
53 | static const char *null () { return nullvec.string; } // this is the null pointer value |
52 | |
54 | |
53 | const char *s; |
55 | const char *s; |
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56 | |
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57 | static unsigned int &hash (const char *s) |
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58 | { |
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59 | return *((unsigned int *)s - 3); |
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60 | } |
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61 | |
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62 | int hash () const |
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63 | { |
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64 | return hash (s); |
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65 | } |
54 | |
66 | |
55 | static unsigned int &length (const char *s) |
67 | static unsigned int &length (const char *s) |
56 | { |
68 | { |
57 | return *((unsigned int *)s - 2); |
69 | return *((unsigned int *)s - 2); |
58 | } |
70 | } |
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128 | inline int strlen (shstr_tmp sh) |
140 | inline int strlen (shstr_tmp sh) |
129 | { |
141 | { |
130 | return sh.length (); |
142 | return sh.length (); |
131 | } |
143 | } |
132 | |
144 | |
133 | static std::ostream &operator <<(std::ostream &o, shstr_tmp sh) |
145 | static inline std::ostream &operator <<(std::ostream &o, shstr_tmp sh) |
134 | { |
146 | { |
135 | o.write (sh.s, sh.length ()); |
147 | o.write (sh.s, sh.length ()); |
136 | |
148 | |
137 | return o; |
149 | return o; |
138 | } |
150 | } |