1 /*
2 __ __ _
3 ___\ \/ /_ __ __ _| |_
4 / _ \\ /| '_ \ / _` | __|
5 | __// \| |_) | (_| | |_
6 \___/_/\_\ .__/ \__,_|\__|
7 |_| XML parser
8
9 Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
10 Copyright (c) 2000-2017 Expat development team
11 Licensed under the MIT license:
12
13 Permission is hereby granted, free of charge, to any person obtaining
14 a copy of this software and associated documentation files (the
15 "Software"), to deal in the Software without restriction, including
16 without limitation the rights to use, copy, modify, merge, publish,
17 distribute, sublicense, and/or sell copies of the Software, and to permit
18 persons to whom the Software is furnished to do so, subject to the
19 following conditions:
20
21 The above copyright notice and this permission notice shall be included
22 in all copies or substantial portions of the Software.
23
24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
27 NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
28 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
29 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
30 USE OR OTHER DEALINGS IN THE SOFTWARE.
31 */
32
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <fcntl.h>
36 #include <stdlib.h>
37 #include <stdio.h>
38
39 /* Functions close(2) and read(2) */
40 #if !defined(_WIN32) && !defined(_WIN64)
41 # include <unistd.h>
42 #endif
43
44 /* Function "read": */
45 #if defined(_MSC_VER)
46 # include <io.h>
47 /* https://msdn.microsoft.com/en-us/library/wyssk1bs(v=vs.100).aspx */
48 # define _EXPAT_read _read
49 # define _EXPAT_read_count_t int
50 # define _EXPAT_read_req_t unsigned int
51 #else /* POSIX */
52 /* http://pubs.opengroup.org/onlinepubs/009695399/functions/read.html */
53 # define _EXPAT_read read
54 # define _EXPAT_read_count_t ssize_t
55 # define _EXPAT_read_req_t size_t
56 #endif
57
58 #ifndef S_ISREG
59 # ifndef S_IFREG
60 # define S_IFREG _S_IFREG
61 # endif
62 # ifndef S_IFMT
63 # define S_IFMT _S_IFMT
64 # endif
65 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
66 #endif /* not S_ISREG */
67
68 #ifndef O_BINARY
69 # ifdef _O_BINARY
70 # define O_BINARY _O_BINARY
71 # else
72 # define O_BINARY 0
73 # endif
74 #endif
75
76 #include "xmltchar.h"
77 #include "filemap.h"
78
79 int
filemap(const tchar * name,void (* processor)(const void *,size_t,const tchar *,void * arg),void * arg)80 filemap(const tchar *name,
81 void (*processor)(const void *, size_t, const tchar *, void *arg),
82 void *arg)
83 {
84 size_t nbytes;
85 int fd;
86 _EXPAT_read_count_t n;
87 struct stat sb;
88 void *p;
89
90 fd = topen(name, O_RDONLY|O_BINARY);
91 if (fd < 0) {
92 tperror(name);
93 return 0;
94 }
95 if (fstat(fd, &sb) < 0) {
96 tperror(name);
97 close(fd);
98 return 0;
99 }
100 if (!S_ISREG(sb.st_mode)) {
101 ftprintf(stderr, T("%s: not a regular file\n"), name);
102 close(fd);
103 return 0;
104 }
105 if (sb.st_size > XML_MAX_CHUNK_LEN) {
106 close(fd);
107 return 2; /* Cannot be passed to XML_Parse in one go */
108 }
109
110 nbytes = sb.st_size;
111 /* malloc will return NULL with nbytes == 0, handle files with size 0 */
112 if (nbytes == 0) {
113 static const char c = '\0';
114 processor(&c, 0, name, arg);
115 close(fd);
116 return 1;
117 }
118 p = malloc(nbytes);
119 if (!p) {
120 ftprintf(stderr, T("%s: out of memory\n"), name);
121 close(fd);
122 return 0;
123 }
124 n = _EXPAT_read(fd, p, (_EXPAT_read_req_t)nbytes);
125 if (n < 0) {
126 tperror(name);
127 free(p);
128 close(fd);
129 return 0;
130 }
131 if (n != (_EXPAT_read_count_t)nbytes) {
132 ftprintf(stderr, T("%s: read unexpected number of bytes\n"), name);
133 free(p);
134 close(fd);
135 return 0;
136 }
137 processor(p, nbytes, name, arg);
138 free(p);
139 close(fd);
140 return 1;
141 }
142