reactos/lib/msvcrt/stdio/getc.c

   1 #include <windows.h>
   2 #include <msvcrt/stdio.h>
   3 #include <msvcrt/wchar.h>
   4 #include <msvcrt/errno.h>
   5 #include <msvcrt/internal/file.h>
   6
   7 //getc can be a macro
   8 #undef getc
   9
  10 int getc(FILE *fp)
  11 {
  12         int c = -1;
  13 // check for invalid stream
  14
  15         if ( !__validfp (fp) ) {
  16                 __set_errno(EINVAL);
  17                 return EOF;
  18         }
  19 // check for read access on stream
  20
  21         if ( !OPEN4READING(fp) ) {
  22                 __set_errno(EINVAL);
  23                 return -1;
  24         }
  25
  26         if(fp->_cnt > 0) {
  27                 fp->_cnt--;
  28                 c =  (int)*fp->_ptr++;
  29         }
  30         else {
  31                 c =  _filbuf(fp);
  32         }
  33         return c;
  34 }
  35
  36 wint_t getwc(FILE *fp)
  37 {
  38   int c = -1;
  39
  40   // check for invalid stream
  41   if (!__validfp(fp))
  42     {
  43       __set_errno(EINVAL);
  44       return EOF;
  45     }
  46
  47   // check for read access on stream
  48   if (!OPEN4READING(fp))
  49     {
  50       __set_errno(EINVAL);
  51       return -1;
  52     }
  53
  54   // might check on multi bytes if text mode
  55
  56   if (fp->_cnt > 0)
  57     {
  58       fp->_cnt -= sizeof(wchar_t);
  59       c = (wint_t )*((wchar_t *)(fp->_ptr))++;
  60     }
  61   else
  62     {
  63       c = _filwbuf(fp);
  64     }
  65   return c;
  66 }
  67
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