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/mman.h> 35 #include <sys/stat.h> 36 #include <fcntl.h> 37 #include <errno.h> 38 #include <string.h> 39 #include <stdio.h> 40 #include <unistd.h> 41 42 #ifndef MAP_FILE 43 # define MAP_FILE 0 44 #endif 45 46 #include "xmltchar.h" 47 #include "filemap.h" 48 49 #ifdef XML_UNICODE_WCHAR_T 50 # define XML_FMT_STR "ls" 51 #else 52 # define XML_FMT_STR "s" 53 #endif 54 55 int 56 filemap(const tchar *name, 57 void (*processor)(const void *, size_t, const tchar *, void *arg), 58 void *arg) { 59 int fd; 60 size_t nbytes; 61 struct stat sb; 62 void *p; 63 64 fd = topen(name, O_RDONLY); 65 if (fd < 0) { 66 tperror(name); 67 return 0; 68 } 69 if (fstat(fd, &sb) < 0) { 70 tperror(name); 71 close(fd); 72 return 0; 73 } 74 if (! S_ISREG(sb.st_mode)) { 75 close(fd); 76 fprintf(stderr, "%" XML_FMT_STR ": not a regular file\n", name); 77 return 0; 78 } 79 if (sb.st_size > XML_MAX_CHUNK_LEN) { 80 close(fd); 81 return 2; /* Cannot be passed to XML_Parse in one go */ 82 } 83 84 nbytes = sb.st_size; 85 /* mmap fails for zero length files */ 86 if (nbytes == 0) { 87 static const char c = '\0'; 88 processor(&c, 0, name, arg); 89 close(fd); 90 return 1; 91 } 92 p = (void *)mmap((void *)0, (size_t)nbytes, PROT_READ, MAP_FILE | MAP_PRIVATE, 93 fd, (off_t)0); 94 if (p == (void *)-1) { 95 tperror(name); 96 close(fd); 97 return 0; 98 } 99 processor(p, nbytes, name, arg); 100 munmap((void *)p, nbytes); 101 close(fd); 102 return 1; 103 } 104