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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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v_08_11
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8n11084a
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1990-09-18
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778b
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# include <stdio.h>
typedef int Truth;
class File { // Implementation layered on FILE
public:
File( char *name = "", char *mode = "r")
{
if( *name )
fp = fopen( name, mode);
else if( *mode == 'r' )
fp = stdin;
else
fp = stdout;
state = (int)fp;
}
~File() { if( fp) fclose( fp); }
Truth isok() { return state; }
Truth iseof() { return feof( fp); }
int get() { return getc( fp); }
// unget and peek useful for lexical scanners
void unget(int c) { (void)ungetc( c, fp); }
int peek() { int c = get(); unget(c); return c; }
void put( int c) { putc( c, fp); }
private:
FILE *fp;
int state;
};