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