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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 apss shared strings around, i.e. as function arguments |
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| 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; |
| 54 | |
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 | } |
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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 | } |
| 59 | |
71 | |
