104 lines
2.9 KiB
C
104 lines
2.9 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/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifndef MAP_FILE
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# define MAP_FILE 0
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#endif
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#include "xmltchar.h"
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#include "filemap.h"
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#ifdef XML_UNICODE_WCHAR_T
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# define XML_FMT_STR "ls"
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#else
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# define XML_FMT_STR "s"
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#endif
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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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int fd;
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size_t nbytes;
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struct stat sb;
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void *p;
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fd = topen(name, O_RDONLY);
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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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close(fd);
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fprintf(stderr, "%" XML_FMT_STR ": not a regular file\n", name);
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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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/* mmap fails for zero length files */
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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 = (void *)mmap((void *)0, (size_t)nbytes, PROT_READ, MAP_FILE | MAP_PRIVATE,
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fd, (off_t)0);
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if (p == (void *)-1) {
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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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processor(p, nbytes, name, arg);
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munmap((void *)p, nbytes);
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close(fd);
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return 1;
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}
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