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
79int
80filemap(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