Annotation of embedaddon/php/ext/zip/lib/zip_source_filep.c, revision 1.1.1.2
1.1 misho 1: /*
2: zip_source_filep.c -- create data source from FILE *
3: Copyright (C) 1999-2009 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 <sys/stat.h>
37: #include <errno.h>
38: #include <stdio.h>
39: #include <stdlib.h>
40: #include <string.h>
41:
42: #include "zipint.h"
43:
44: struct read_file {
45: char *fname; /* name of file to copy from */
46: FILE *f; /* file to copy from */
1.1.1.2 ! misho 47: int closep; /* close f */
! 48: struct zip_stat st; /* stat information passed in */
! 49:
! 50: zip_uint64_t off; /* start offset of */
! 51: zip_int64_t len; /* length of data to copy */
! 52: zip_int64_t remain; /* bytes remaining to be copied */
1.1 misho 53: int e[2]; /* error codes */
54: };
55:
1.1.1.2 ! misho 56: static zip_int64_t read_file(void *state, void *data, zip_uint64_t len,
1.1 misho 57: enum zip_source_cmd cmd);
58:
59:
60:
61: ZIP_EXTERN(struct zip_source *)
1.1.1.2 ! misho 62: zip_source_filep(struct zip *za, FILE *file, zip_uint64_t start,
! 63: zip_int64_t len)
1.1 misho 64: {
65: if (za == NULL)
66: return NULL;
67:
68: if (file == NULL || start < 0 || len < -1) {
69: _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
70: return NULL;
71: }
72:
1.1.1.2 ! misho 73: return _zip_source_file_or_p(za, NULL, file, start, len, 1, NULL);
1.1 misho 74: }
75:
76:
77:
78: struct zip_source *
79: _zip_source_file_or_p(struct zip *za, const char *fname, FILE *file,
1.1.1.2 ! misho 80: zip_uint64_t start, zip_int64_t len, int closep,
! 81: const struct zip_stat *st)
1.1 misho 82: {
83: struct read_file *f;
84: struct zip_source *zs;
85:
86: if (file == NULL && fname == NULL) {
87: _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
88: return NULL;
89: }
90:
91: if ((f=(struct read_file *)malloc(sizeof(struct read_file))) == NULL) {
92: _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
93: return NULL;
94: }
95:
96: f->fname = NULL;
97: if (fname) {
98: if ((f->fname=strdup(fname)) == NULL) {
99: _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
100: free(f);
101: return NULL;
102: }
103: }
104: f->f = file;
105: f->off = start;
106: f->len = (len ? len : -1);
1.1.1.2 ! misho 107: f->closep = f->fname ? 1 : closep;
! 108: if (st)
! 109: memcpy(&f->st, st, sizeof(f->st));
! 110: else
! 111: zip_stat_init(&f->st);
! 112:
1.1 misho 113: if ((zs=zip_source_function(za, read_file, f)) == NULL) {
114: free(f);
115: return NULL;
116: }
117:
118: return zs;
119: }
120:
121:
122:
1.1.1.2 ! misho 123: static zip_int64_t
! 124: read_file(void *state, void *data, zip_uint64_t len, enum zip_source_cmd cmd)
1.1 misho 125: {
126: struct read_file *z;
127: char *buf;
128: int i, n;
129:
130: z = (struct read_file *)state;
131: buf = (char *)data;
132:
133: switch (cmd) {
134: case ZIP_SOURCE_OPEN:
135: if (z->fname) {
136: if ((z->f=fopen(z->fname, "rb")) == NULL) {
137: z->e[0] = ZIP_ER_OPEN;
138: z->e[1] = errno;
139: return -1;
140: }
141: }
142:
1.1.1.2 ! misho 143: if (z->closep) {
! 144: if (fseeko(z->f, (off_t)z->off, SEEK_SET) < 0) {
! 145: z->e[0] = ZIP_ER_SEEK;
! 146: z->e[1] = errno;
! 147: return -1;
! 148: }
1.1 misho 149: }
150: z->remain = z->len;
151: return 0;
152:
153: case ZIP_SOURCE_READ:
1.1.1.2 ! misho 154: /* XXX: return INVAL if len > size_t max */
1.1 misho 155: if (z->remain != -1)
156: n = len > z->remain ? z->remain : len;
157: else
158: n = len;
1.1.1.2 ! misho 159:
! 160: if (!z->closep) {
! 161: /* we might share this file with others, so let's be safe */
! 162: if (fseeko(z->f, (off_t)(z->off + z->len-z->remain),
! 163: SEEK_SET) < 0) {
! 164: z->e[0] = ZIP_ER_SEEK;
! 165: z->e[1] = errno;
! 166: return -1;
! 167: }
! 168: }
! 169:
1.1 misho 170: if ((i=fread(buf, 1, n, z->f)) < 0) {
171: z->e[0] = ZIP_ER_READ;
172: z->e[1] = errno;
173: return -1;
174: }
175:
176: if (z->remain != -1)
177: z->remain -= i;
178:
179: return i;
180:
181: case ZIP_SOURCE_CLOSE:
182: if (z->fname) {
183: fclose(z->f);
184: z->f = NULL;
185: }
186: return 0;
187:
188: case ZIP_SOURCE_STAT:
189: {
1.1.1.2 ! misho 190: if (len < sizeof(z->st))
1.1 misho 191: return -1;
192:
1.1.1.2 ! misho 193: if (z->st.valid != 0)
! 194: memcpy(data, &z->st, sizeof(z->st));
! 195: else {
! 196: struct zip_stat *st;
! 197: struct stat fst;
! 198: int err;
! 199:
! 200: if (z->f)
! 201: err = fstat(fileno(z->f), &fst);
! 202: else
! 203: err = stat(z->fname, &fst);
! 204:
! 205: if (err != 0) {
! 206: z->e[0] = ZIP_ER_READ; /* best match */
! 207: z->e[1] = errno;
! 208: return -1;
! 209: }
! 210:
! 211: st = (struct zip_stat *)data;
! 212:
! 213: zip_stat_init(st);
! 214: st->mtime = fst.st_mtime;
! 215: st->valid |= ZIP_STAT_MTIME;
! 216: if (z->len != -1) {
! 217: st->size = z->len;
! 218: st->valid |= ZIP_STAT_SIZE;
! 219: }
! 220: else if ((fst.st_mode&S_IFMT) == S_IFREG) {
! 221: st->size = fst.st_size;
! 222: st->valid |= ZIP_STAT_SIZE;
! 223: }
1.1 misho 224: }
1.1.1.2 ! misho 225: return sizeof(z->st);
1.1 misho 226: }
227:
228: case ZIP_SOURCE_ERROR:
229: if (len < sizeof(int)*2)
230: return -1;
231:
232: memcpy(data, z->e, sizeof(int)*2);
233: return sizeof(int)*2;
234:
235: case ZIP_SOURCE_FREE:
236: free(z->fname);
1.1.1.2 ! misho 237: if (z->closep && z->f)
! 238: fclose(z->f);
1.1 misho 239: free(z);
240: return 0;
241:
242: default:
243: ;
244: }
245:
246: return -1;
247: }
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