src/expat/xmlwf/readfilemap.c

   1 /* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
   2    See the file COPYING for copying permission.
   3 */
   4
   5 #include <sys/types.h>
   6 #include <sys/stat.h>
   7 #include <fcntl.h>
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10
  11 #ifndef S_ISREG
  12 #ifndef S_IFREG
  13 #define S_IFREG _S_IFREG
  14 #endif
  15 #ifndef S_IFMT
  16 #define S_IFMT _S_IFMT
  17 #endif
  18 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
  19 #endif /* not S_ISREG */
  20
  21 #ifndef O_BINARY
  22 #ifdef _O_BINARY
  23 #define O_BINARY _O_BINARY
  24 #else
  25 #define O_BINARY 0
  26 #endif
  27 #endif
  28
  29 #include "filemap.h"
  30
  31 int
  32 filemap(const char *name,
  33         void (*processor)(const void *, size_t, const char *, void *arg),
  34         void *arg)
  35 {
  36   size_t nbytes;
  37   int fd;
  38   int n;
  39   struct stat sb;
  40   void *p;
  41
  42   fd = open(name, O_RDONLY|O_BINARY);
  43   if (fd < 0) {
  44     perror(name);
  45     return 0;
  46   }
  47   if (fstat(fd, &sb) < 0) {
  48     perror(name);
  49     return 0;
  50   }
  51   if (!S_ISREG(sb.st_mode)) {
  52     fprintf(stderr, "%s: not a regular file\n", name);
  53     return 0;
  54   }
  55   nbytes = sb.st_size;
  56   p = malloc(nbytes);
  57   if (!p) {
  58     fprintf(stderr, "%s: out of memory\n", name);
  59     return 0;
  60   }
  61   n = read(fd, p, nbytes);
  62   if (n < 0) {
  63     perror(name);
  64     free(p);
  65     close(fd);
  66     return 0;
  67   }
  68   if (n != nbytes) {
  69     fprintf(stderr, "%s: read unexpected number of bytes\n", name);
  70     free(p);
  71     close(fd);
  72     return 0;
  73   }
  74   processor(p, nbytes, name, arg);
  75   free(p);
  76   close(fd);
  77   return 1;
  78 }