xref: /PHP-7.3/ext/zip/lib/zip_io_util.c (revision 64002648)
1 /*
2  zip_io_util.c -- I/O helper functions
3  Copyright (C) 1999-2015 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 #include <stdlib.h>
35 #include <string.h>
36 
37 #include "zipint.h"
38 
39 int
_zip_read(zip_source_t * src,zip_uint8_t * b,zip_uint64_t length,zip_error_t * error)40 _zip_read(zip_source_t *src, zip_uint8_t *b, zip_uint64_t length, zip_error_t *error)
41 {
42     zip_int64_t n;
43 
44     if (length > ZIP_INT64_MAX) {
45 	zip_error_set(error, ZIP_ER_INTERNAL, 0);
46 	return -1;
47     }
48 
49     if ((n = zip_source_read(src, b, length)) < 0) {
50 	_zip_error_set_from_source(error, src);
51 	return -1;
52     }
53 
54     if (n < (zip_int64_t)length) {
55 	zip_error_set(error, ZIP_ER_EOF, 0);
56 	return -1;
57     }
58 
59     return 0;
60 }
61 
62 
63 zip_uint8_t *
_zip_read_data(zip_buffer_t * buffer,zip_source_t * src,size_t length,bool nulp,zip_error_t * error)64 _zip_read_data(zip_buffer_t *buffer, zip_source_t *src, size_t length, bool nulp, zip_error_t *error)
65 {
66     zip_uint8_t *r;
67 
68     if (length == 0 && !nulp) {
69 	return NULL;
70     }
71 
72     r = (zip_uint8_t *)malloc(length + (nulp ? 1 : 0));
73     if (!r) {
74 	zip_error_set(error, ZIP_ER_MEMORY, 0);
75 	return NULL;
76     }
77 
78     if (buffer) {
79         zip_uint8_t *data = _zip_buffer_get(buffer, length);
80 
81         if (data == NULL) {
82             zip_error_set(error, ZIP_ER_MEMORY, 0);
83             free(r);
84             return NULL;
85         }
86 	memcpy(r, data, length);
87     }
88     else {
89 	if (_zip_read(src, r, length, error) < 0) {
90 	    free(r);
91 	    return NULL;
92 	}
93     }
94 
95     if (nulp) {
96 	zip_uint8_t *o;
97 	/* replace any in-string NUL characters with spaces */
98 	r[length] = 0;
99 	for (o=r; o<r+length; o++)
100 	    if (*o == '\0')
101 		*o = ' ';
102     }
103 
104     return r;
105 }
106 
107 
108 zip_string_t *
_zip_read_string(zip_buffer_t * buffer,zip_source_t * src,zip_uint16_t len,bool nulp,zip_error_t * error)109 _zip_read_string(zip_buffer_t *buffer, zip_source_t *src, zip_uint16_t len, bool nulp, zip_error_t *error)
110 {
111     zip_uint8_t *raw;
112     zip_string_t *s;
113 
114     if ((raw=_zip_read_data(buffer, src, len, nulp, error)) == NULL)
115 	return NULL;
116 
117     s = _zip_string_new(raw, len, ZIP_FL_ENC_GUESS, error);
118     free(raw);
119     return s;
120 }
121 
122 
123 int
_zip_write(zip_t * za,const void * data,zip_uint64_t length)124 _zip_write(zip_t *za, const void *data, zip_uint64_t length)
125 {
126     zip_int64_t n;
127 
128     if ((n = zip_source_write(za->src, data, length)) < 0) {
129         _zip_error_set_from_source(&za->error, za->src);
130         return -1;
131     }
132     if ((zip_uint64_t)n != length) {
133         zip_error_set(&za->error, ZIP_ER_WRITE, EINTR);
134         return -1;
135     }
136 
137     return 0;
138 }
139