reactos/lib/crtdll/stdio/fgetws.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <msvcrt/stdio.h>
   3 #include <msvcrt/internal/file.h>
   4
   5 //wchar_t* fgetws(wchar_t* wcaBuffer, int nBufferSize, FILE* fileRead);
   6 //char* fgets(char *s, int n, FILE *f);
   7 //int _getw(FILE *stream);
   8 /*
   9 // Read a word (int) from STREAM.
  10 int _getw(FILE *stream)
  11 {
  12   int w;
  13
  14   // Is there a better way?
  15   if (fread( &w, sizeof(w), 1, stream) != 1)
  16     return(EOF);
  17   return(w);
  18 }
  19
  20 //getc can be a macro
  21 #undef getc
  22
  23 int getc(FILE *fp)
  24 {
  25     int c = -1;
  26 // check for invalid stream
  27         if ( !__validfp (fp) ) {
  28                 __set_errno(EINVAL);
  29                 return EOF;
  30         }
  31 // check for read access on stream
  32         if ( !OPEN4READING(fp) ) {
  33                 __set_errno(EINVAL);
  34                 return -1;
  35         }
  36         if(fp->_cnt > 0) {
  37                 fp->_cnt--;
  38                 c =  (int)*fp->_ptr++;
  39         }
  40         else {
  41                 c =  _filbuf(fp);
  42         }
  43         return c;
  44 }
  45  */
  46
  47 wchar_t* fgetws(wchar_t* s, int n, FILE* f)
  48 {
  49   int c = 0;
  50   wchar_t* cs;
  51
  52   cs = s;
  53   while (--n > 0 && (c = _getw(f)) != EOF) {
  54     *cs++ = c;
  55     if (c == L'\n')
  56       break;
  57   }
  58   if (c == EOF && cs == s) {
  59     return NULL;
  60   }
  61   *cs++ = L'\0';
  62   return s;
  63 }