162 lines
3.3 KiB
C++
162 lines
3.3 KiB
C++
/*
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Copyright (C) 2003 Parallel Realities
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "unpack.h"
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/*
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Searches the pak file for the required data. When
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it is found, the data is read into a character buffer.
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*/
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void unpack(const char *file, signed char fileType)
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{
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unsigned char *packBuffer;
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char packFilename[60];
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int packFSize;
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FILE *pak;
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FILE *fp = NULL; // music has to be read-written-read!
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char musicFilename[PATH_MAX];
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strcpy(packFilename, "");
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pak = fopen(PACKLOCATION, "rb");
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if (pak == NULL)
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{
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printf("Couldn't access the Project: Starfighter data file!\n");
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exit(1);
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}
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fseek(pak, 4, SEEK_SET);
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while (true)
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{
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if (!fread(packFilename, 1, 56, pak))
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{
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fclose(pak);
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if (fileType != PAK_FONT)
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{
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showErrorAndExit(0, file);
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}
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exit(1);
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break;
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}
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fread(&packFSize, 4, 1, pak);
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packFSize = SDL_SwapLE32(packFSize);
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if (strcmp(packFilename, file) == 0)
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{
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if ((fileType == PAK_MOD) || (fileType == PAK_S3M))
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{
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if (fileType == PAK_MOD)
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{
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sprintf(musicFilename, "%smusic.mod", engine.userHomeDirectory);
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fp = fopen(musicFilename, "wb");
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}
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else
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{
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sprintf(musicFilename, "%smusic.s3m", engine.userHomeDirectory);
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fp = fopen(musicFilename, "wb");
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}
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if (fp == NULL)
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showErrorAndExit(1, "");
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}
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packBuffer = (unsigned char*) malloc(packFSize);
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fread(packBuffer, 1, packFSize, pak);
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if ((fileType == PAK_MOD) || (fileType == PAK_S3M))
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{
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fwrite(packBuffer, 1, packFSize, fp);
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fclose(fp);
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}
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break;
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}
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else
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{
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fseek(pak, packFSize, SEEK_CUR);
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}
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}
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if ((fileType != PAK_MOD) && (fileType != PAK_S3M))
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engine.sdlrw = SDL_RWFromMem(packBuffer, packFSize);
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//printf("Extracted: %s\n", file);
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fclose(pak);
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}
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/*
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Search the data package for the required file.
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When it is found, return the location.
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*/
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int locateDataInPak(const char *file, signed char required)
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{
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//printf("Looking for %s...", file);
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char packFilename[60];
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int packFSize;
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int location = 0;
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FILE *pak;
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strcpy(packFilename, "");
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pak = fopen(PACKLOCATION, "rb");
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if (pak == NULL)
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{
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printf("Couldn't access the Project: Starfighter data file!\n");
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exit(1);
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}
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fseek(pak, 4, SEEK_SET);
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while (true)
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{
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if (!fread(packFilename, 1, 56, pak))
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{
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fclose(pak);
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if (required)
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{
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showErrorAndExit(0, file);
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exit(1);
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}
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break;
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}
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fread(&packFSize, 4, 1, pak);
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packFSize = SDL_SwapLE32(packFSize);
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if (strcmp(packFilename, file) == 0)
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{
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location = ftell(pak);
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fclose(pak);
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//printf("found it!\n");
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return location;
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}
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else
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{
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fseek(pak, packFSize, SEEK_CUR);
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}
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}
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//printf("not found (skipping)\n");
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return -1; // we only get this if it isn't required
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}
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