?? usage.c
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/*
* 68K/386 32-bit C compiler.
*
* copyright (c) 1997, David Lindauer
*
* This compiler is intended for educational use. It may not be used
* for profit without the express written consent of the author.
*
* It may be freely redistributed, as long as this notice remains intact
* and either the original sources or derived sources
* are distributed along with any executables derived from the originals.
*
* The author is not responsible for any damages that may arise from use
* of this software, either idirect or consequential.
*
* v1.35 March 1997
* David Lindauer, gclind01@starbase.spd.louisville.edu
*
* Credits to Mathew Brandt for original K&R C compiler
*
*/
/*
* Display usage information and exit.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "cmdline.h"
/*
* Main program must define the usage text
*/
extern char *usage_text;
/* Program banner */
void banner( char *fmt, ... )
{
va_list argptr;
putc('\n', stdout);
va_start( argptr, fmt);
vprintf( fmt, argptr);
va_end(argptr);
putc('\n', stdout);
putc('\n', stdout);
}
/* Print usage info */
void usage( char *prog_name)
{
char *short_name;
char *extension;
short_name = strrchr(prog_name, '\\' );
if (short_name == NULL)
short_name = strrchr( prog_name, '/' );
if (short_name == NULL)
short_name = strrchr( prog_name, ':' );
if (short_name)
short_name++;
else
short_name = prog_name;
extension = strrchr( short_name, '.');
if (extension != NULL)
*extension = '\0';
printf("\nUsage: %s %s\n", short_name, usage_text);
exit( 1 );
}
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