reactos/lib/msvcrt/stdio/getc.c

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