Mercurial > hg > nginx
annotate src/core/ngx_array.c @ 541:b09ee85d0ac8 release-0.1.45
nginx-0.1.45-RELEASE import
*) Change: the "ssl_engine" directive was canceled in the
ngx_http_ssl_module and now is introduced at global level.
*) Bugfix: the responses with SSI subrequests did not transferred via
SSL connection.
*) Various bug fixes in the IMAP/POP3 proxy.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Thu, 08 Sep 2005 14:36:09 +0000 |
| parents | d4ea69372b94 |
| children | 5dac8c7fb71b |
| rev | line source |
|---|---|
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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| 485 | 11 ngx_array_t *ngx_array_create(ngx_pool_t *p, ngx_uint_t n, size_t size) |
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12 { |
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13 ngx_array_t *a; |
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14 |
| 501 | 15 a = ngx_palloc(p, sizeof(ngx_array_t)); |
| 16 if (a == NULL) { | |
| 485 | 17 return NULL; |
| 18 } | |
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19 |
| 501 | 20 a->elts = ngx_palloc(p, n * size); |
| 21 if (a->elts == NULL) { | |
| 485 | 22 return NULL; |
| 23 } | |
| 24 | |
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25 a->nelts = 0; |
| 485 | 26 a->size = size; |
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27 a->nalloc = n; |
| 485 | 28 a->pool = p; |
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29 |
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30 return a; |
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31 } |
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32 |
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33 |
| 485 | 34 void ngx_array_destroy(ngx_array_t *a) |
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35 { |
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36 ngx_pool_t *p; |
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37 |
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38 p = a->pool; |
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39 |
| 485 | 40 if ((u_char *) a->elts + a->size * a->nalloc == p->last) { |
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41 p->last -= a->size * a->nalloc; |
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42 } |
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43 |
| 485 | 44 if ((u_char *) a + sizeof(ngx_array_t) == p->last) { |
| 45 p->last = (u_char *) a; | |
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46 } |
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47 } |
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48 |
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49 |
| 485 | 50 void *ngx_array_push(ngx_array_t *a) |
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51 { |
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52 void *elt, *new; |
| 485 | 53 size_t size; |
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54 ngx_pool_t *p; |
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55 |
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56 if (a->nelts == a->nalloc) { |
| 485 | 57 |
| 58 /* the array is full */ | |
| 59 | |
| 60 size = a->size * a->nalloc; | |
| 61 | |
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62 p = a->pool; |
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63 |
| 485 | 64 if ((u_char *) a->elts + size == p->last && p->last + a->size <= p->end) |
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65 { |
| 485 | 66 /* |
| 67 * the array allocation is the last in the pool | |
| 68 * and there is space for new allocation | |
| 69 */ | |
| 70 | |
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71 p->last += a->size; |
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72 a->nalloc++; |
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73 |
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74 } else { |
| 485 | 75 /* allocate a new array */ |
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76 |
| 501 | 77 new = ngx_palloc(p, 2 * size); |
| 78 if (new == NULL) { | |
| 485 | 79 return NULL; |
| 80 } | |
| 81 | |
| 82 ngx_memcpy(new, a->elts, size); | |
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83 a->elts = new; |
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84 a->nalloc *= 2; |
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85 } |
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86 } |
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87 |
| 485 | 88 elt = (u_char *) a->elts + a->size * a->nelts; |
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89 a->nelts++; |
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90 |
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91 return elt; |
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92 } |
| 485 | 93 |
| 94 | |
| 95 void *ngx_array_push_n(ngx_array_t *a, ngx_uint_t n) | |
| 96 { | |
| 97 void *elt, *new; | |
| 98 size_t size; | |
| 99 ngx_uint_t nalloc; | |
| 100 ngx_pool_t *p; | |
| 101 | |
| 102 size = n * a->size; | |
| 103 | |
| 104 if (a->nelts + n > a->nalloc) { | |
| 105 | |
| 106 /* the array is full */ | |
| 107 | |
| 108 p = a->pool; | |
| 109 | |
| 110 if ((u_char *) a->elts + a->size * a->nalloc == p->last | |
| 111 && p->last + size <= p->end) | |
| 112 { | |
| 113 /* | |
| 114 * the array allocation is the last in the pool | |
| 115 * and there is space for new allocation | |
| 116 */ | |
| 117 | |
| 118 p->last += size; | |
| 119 a->nalloc += n; | |
| 120 | |
| 121 } else { | |
| 122 /* allocate a new array */ | |
| 123 | |
| 124 nalloc = 2 * ((n >= a->nalloc) ? n : a->nalloc); | |
| 125 | |
| 501 | 126 new = ngx_palloc(p, nalloc * a->size); |
| 127 if (new == NULL) { | |
| 485 | 128 return NULL; |
| 129 } | |
| 130 | |
| 131 ngx_memcpy(new, a->elts, a->nelts * a->size); | |
| 132 a->elts = new; | |
| 133 a->nalloc = nalloc; | |
| 134 } | |
| 135 } | |
| 136 | |
| 137 elt = (u_char *) a->elts + a->size * a->nelts; | |
| 138 a->nelts += n; | |
| 139 | |
| 140 return elt; | |
| 141 } |