Annotation of embedaddon/php/ext/zip/lib/zip_source_buffer.c, revision 1.1
1.1 ! misho 1: /*
! 2: zip_source_buffer.c -- create zip data source from buffer
! 3: Copyright (C) 1999-2007 Dieter Baron and Thomas Klausner
! 4:
! 5: This file is part of libzip, a library to manipulate ZIP archives.
! 6: The authors can be contacted at <libzip@nih.at>
! 7:
! 8: Redistribution and use in source and binary forms, with or without
! 9: modification, are permitted provided that the following conditions
! 10: are met:
! 11: 1. Redistributions of source code must retain the above copyright
! 12: notice, this list of conditions and the following disclaimer.
! 13: 2. Redistributions in binary form must reproduce the above copyright
! 14: notice, this list of conditions and the following disclaimer in
! 15: the documentation and/or other materials provided with the
! 16: distribution.
! 17: 3. The names of the authors may not be used to endorse or promote
! 18: products derived from this software without specific prior
! 19: written permission.
! 20:
! 21: THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
! 22: OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 23: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
! 25: DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
! 27: GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 28: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
! 29: IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 30: OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
! 31: IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34:
! 35:
! 36: #include <stdlib.h>
! 37: #include <string.h>
! 38:
! 39: #include "zipint.h"
! 40:
! 41: struct read_data {
! 42: const char *buf, *data, *end;
! 43: time_t mtime;
! 44: int freep;
! 45: };
! 46:
! 47: static ssize_t read_data(void *state, void *data, size_t len,
! 48: enum zip_source_cmd cmd);
! 49:
! 50:
! 51:
! 52: ZIP_EXTERN(struct zip_source *)
! 53: zip_source_buffer(struct zip *za, const void *data, off_t len, int freep)
! 54: {
! 55: struct read_data *f;
! 56: struct zip_source *zs;
! 57:
! 58: if (za == NULL)
! 59: return NULL;
! 60:
! 61: if (len < 0 || (data == NULL && len > 0)) {
! 62: _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
! 63: return NULL;
! 64: }
! 65:
! 66: if ((f=(struct read_data *)malloc(sizeof(*f))) == NULL) {
! 67: _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
! 68: return NULL;
! 69: }
! 70:
! 71: f->data = (const char *)data;
! 72: f->end = ((const char *)data)+len;
! 73: f->freep = freep;
! 74: f->mtime = time(NULL);
! 75:
! 76: if ((zs=zip_source_function(za, read_data, f)) == NULL) {
! 77: free(f);
! 78: return NULL;
! 79: }
! 80:
! 81: return zs;
! 82: }
! 83:
! 84:
! 85:
! 86: static ssize_t
! 87: read_data(void *state, void *data, size_t len, enum zip_source_cmd cmd)
! 88: {
! 89: struct read_data *z;
! 90: char *buf;
! 91: size_t n;
! 92:
! 93: z = (struct read_data *)state;
! 94: buf = (char *)data;
! 95:
! 96: switch (cmd) {
! 97: case ZIP_SOURCE_OPEN:
! 98: z->buf = z->data;
! 99: return 0;
! 100:
! 101: case ZIP_SOURCE_READ:
! 102: n = z->end - z->buf;
! 103: if (n > len)
! 104: n = len;
! 105:
! 106: if (n) {
! 107: memcpy(buf, z->buf, n);
! 108: z->buf += n;
! 109: }
! 110:
! 111: return n;
! 112:
! 113: case ZIP_SOURCE_CLOSE:
! 114: return 0;
! 115:
! 116: case ZIP_SOURCE_STAT:
! 117: {
! 118: struct zip_stat *st;
! 119:
! 120: if (len < sizeof(*st))
! 121: return -1;
! 122:
! 123: st = (struct zip_stat *)data;
! 124:
! 125: zip_stat_init(st);
! 126: st->mtime = z->mtime;
! 127: st->size = z->end - z->data;
! 128:
! 129: return sizeof(*st);
! 130: }
! 131:
! 132: case ZIP_SOURCE_ERROR:
! 133: {
! 134: int *e;
! 135:
! 136: if (len < sizeof(int)*2)
! 137: return -1;
! 138:
! 139: e = (int *)data;
! 140: e[0] = e[1] = 0;
! 141: }
! 142: return sizeof(int)*2;
! 143:
! 144: case ZIP_SOURCE_FREE:
! 145: if (z->freep) {
! 146: free((void *)z->data);
! 147: z->data = NULL;
! 148: }
! 149: free(z);
! 150: return 0;
! 151:
! 152: default:
! 153: ;
! 154: }
! 155:
! 156: return -1;
! 157: }
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