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 size_t nbytes;
84 int fd;
85 _EXPAT_read_count_t n;
86 struct stat sb;
87 void *p;
88
89 fd = topen(name, O_RDONLY | O_BINARY);
90 if (fd < 0) {
91 tperror(name);
92 return 0;
93 }
94 if (fstat(fd, &sb) < 0) {
95 tperror(name);
96 close(fd);
97 return 0;
98 }
99 if (! S_ISREG(sb.st_mode)) {
100 ftprintf(stderr, T("%s: not a regular file\n"), name);
101 close(fd);
102 return 0;
103 }
104 if (sb.st_size > XML_MAX_CHUNK_LEN) {
105 close(fd);
106 return 2; /* Cannot be passed to XML_Parse in one go */
107 }
108
109 nbytes = sb.st_size;
110 /* malloc will return NULL with nbytes == 0, handle files with size 0 */
111 if (nbytes == 0) {
112 static const char c = '\0';
113 processor(&c, 0, name, arg);
114 close(fd);
115 return 1;
116 }
117 p = malloc(nbytes);
118 if (! p) {
119 ftprintf(stderr, T("%s: out of memory\n"), name);
120 close(fd);
121 return 0;
122 }
123 n = _EXPAT_read(fd, p, (_EXPAT_read_req_t)nbytes);
124 if (n < 0) {
125 tperror(name);
126 free(p);
127 close(fd);
128 return 0;
129 }
130 if (n != (_EXPAT_read_count_t)nbytes) {
131 ftprintf(stderr, T("%s: read unexpected number of bytes\n"), name);
132 free(p);
133 close(fd);
134 return 0;
135 }
136 processor(p, nbytes, name, arg);
137 free(p);
138 close(fd);
139 return 1;
140 }
141