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/* $Id: queen_extract.c 1212 2003-08-26 18:09:57Z twogood $ */
/*
Example code for libdynamite.
This code extracts the files from the installer to the adventure game "Flight
of the Amazon Queen" from 1995.
It takes the installation data files QUEEN._[1-6] and extracts these files:
QUEEN.1
DOS4GW.EXE
SETUP.EXE
SETUP.SB
SETUP.MUS
SETUP.RL
QUEEN.EXE
AQ.BAT
*/
#define _BSD_SOURCE 1
#include "libdynamite.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_FILENAME_SIZE 30
#define FCLOSE(file) if (file) { fclose(file); file = NULL; }
typedef struct _Cookie
{
int index;
FILE* input_file;
FILE* output_file;
} Cookie;
static void next_file(Cookie* cookie)
{
char filename[16];
FCLOSE(cookie->input_file);
cookie->index++;
snprintf(filename, sizeof(filename), "QUEEN._%i", cookie->index);
cookie->input_file = fopen(filename, "r");
if (!cookie->input_file && cookie->index <= 6)
{
fprintf(stderr, "Failed to open file '%s'\n", filename);
}
}
static size_t reader(void* buffer, size_t size, void* cookie)
{
size_t result = fread(buffer, 1, size, ((Cookie*)cookie)->input_file);
if (result < size)
{
next_file((Cookie*)cookie);
if (((Cookie*)cookie)->input_file)
{
buffer += result;
result += fread(buffer, 1, size - result, ((Cookie*)cookie)->input_file);
}
}
return result;
}
static size_t writer(void* buffer, size_t size, void* cookie)
{
return fwrite(buffer, 1, size, ((Cookie*)cookie)->output_file);
}
int main(int argc, char** argv)
{
int result = -1;
Cookie cookie;
memset(&cookie, 0, sizeof(Cookie));
next_file(&cookie);
for (;;)
{
uint8_t name_size;
char* name = NULL;
#if 0
printf("Volume %i, offset 0x%08lx\n", cookie.index, ftell(cookie.input_file));
#endif
if (sizeof(name_size) != reader(&name_size, sizeof(name_size), &cookie))
break;
name = malloc(MAX_FILENAME_SIZE);
if (MAX_FILENAME_SIZE != reader(name, MAX_FILENAME_SIZE, &cookie))
{
fprintf(stderr, "read name failed\n");
break;
}
name[name_size] = '\0';
printf("extracting: %s\n", name);
cookie.output_file = fopen(name, "w");
result = dynamite_explode(reader, writer, &cookie);
FCLOSE(cookie.output_file);
if (DYNAMITE_SUCCESS != result)
{
fprintf(stderr, "Error %i\n", result);
break;
}
}
FCLOSE(cookie.input_file);
FCLOSE(cookie.output_file);
return result;
}
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