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/*
__ __ _
___\ \/ /_ __ __ _| |_
/ _ \\ /| '_ \ / _` | __|
| __// \| |_) | (_| | |_
\___/_/\_\ .__/ \__,_|\__|
|_| XML parser
Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
Copyright (c) 2000-2017 Expat development team
Licensed under the MIT license:
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to permit
persons to whom the Software is furnished to do so, subject to the
following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
/* Functions close(2) and read(2) */
#if !defined(_WIN32) && !defined(_WIN64)
# include <unistd.h>
#endif
/* Function "read": */
#if defined(_MSC_VER)
# include <io.h>
/* https://msdn.microsoft.com/en-us/library/wyssk1bs(v=vs.100).aspx */
# define _EXPAT_read _read
# define _EXPAT_read_count_t int
#else /* POSIX */
/* http://pubs.opengroup.org/onlinepubs/009695399/functions/read.html */
# define _EXPAT_read read
# define _EXPAT_read_count_t ssize_t
#endif
#ifndef S_ISREG
# ifndef S_IFREG
# define S_IFREG _S_IFREG
# endif
# ifndef S_IFMT
# define S_IFMT _S_IFMT
# endif
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif /* not S_ISREG */
#ifndef O_BINARY
# ifdef _O_BINARY
# define O_BINARY _O_BINARY
# else
# define O_BINARY 0
# endif
#endif
#include "xmltchar.h"
#include "filemap.h"
int
filemap(const tchar *name,
void (*processor)(const void *, size_t, const tchar *, void *arg),
void *arg)
{
size_t nbytes;
int fd;
_EXPAT_read_count_t n;
struct stat sb;
void *p;
fd = topen(name, O_RDONLY|O_BINARY);
if (fd < 0) {
tperror(name);
return 0;
}
if (fstat(fd, &sb) < 0) {
tperror(name);
close(fd);
return 0;
}
if (!S_ISREG(sb.st_mode)) {
ftprintf(stderr, T("%s: not a regular file\n"), name);
close(fd);
return 0;
}
if (sb.st_size > XML_MAX_CHUNK_LEN) {
close(fd);
return 2; /* Cannot be passed to XML_Parse in one go */
}
nbytes = sb.st_size;
/* malloc will return NULL with nbytes == 0, handle files with size 0 */
if (nbytes == 0) {
static const char c = '\0';
processor(&c, 0, name, arg);
close(fd);
return 1;
}
p = malloc(nbytes);
if (!p) {
ftprintf(stderr, T("%s: out of memory\n"), name);
close(fd);
return 0;
}
n = _EXPAT_read(fd, p, nbytes);
if (n < 0) {
tperror(name);
free(p);
close(fd);
return 0;
}
if (n != (_EXPAT_read_count_t)nbytes) {
ftprintf(stderr, T("%s: read unexpected number of bytes\n"), name);
free(p);
close(fd);
return 0;
}
processor(p, nbytes, name, arg);
free(p);
close(fd);
return 1;
}
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