main-e.cpp

来自「算术编码c程序实现」· C++ 代码 · 共 56 行

// main-e.cpp

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bitio.h"
#include "errhand.h"
#include "main.h"

void usage_exit( char * prog_name );

int main( int argc, char * argv[] )
{
	FILE* output;
	BIT_FILE* input;
	setbuf(stdout, NULL);
	if (argc < 3)
		usage_exit(argv[0]);
	input = OpenInputBitFile(argv[1]);
	if (input == NULL)
		fatal_error("Error opening %s for input\n", argv[1]);
	output = fopen(argv[2], "wb");
	if (output == NULL)
		fatal_error("Error opening %s for output\n", argv[2]);
	printf("\nExpanding %s to %s\n", argv[1], argv[2]);
	printf("Using %s\n", CompressionName);
	argc -= 3;
	argv += 3;
	ExpandFile(input, output, argc, argv);
	CloseInputBitFile(input);
	fclose(output);
	putc('\n', stdout);
	return 0;
}

void usage_exit(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 != NULL)
		short_name++;
	else
		short_name = prog_name;
	extension = strrchr(short_name, '.');
	if (extension != NULL)
		*extension = '\0';
	printf("\nUsage: %s %s\n", short_name, Usage);
	exit(0);
}