mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
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75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/***************************************************************************
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* Copyright (C) 2011
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* by r-win
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any
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* damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any
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* purpose, including commercial applications, and to alter it and
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* redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you
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* must not claim that you wrote the original software. If you use
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* this software in a product, an acknowledgment in the product
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* documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and
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* must not be misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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* U8Archive.c
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*
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* for Wiiflow 2011
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***************************************************************************/
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#include <string.h>
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#include "U8Archive.h"
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static char *u8Filename(const struct U8Entry *fst, int i)
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{
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return (char *)(fst + fst[0].numEntries) + fst[i].nameOffset;
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}
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static struct U8Header *open_u8_archive(const u8 *u8_archive)
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{
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struct U8Header *arcHdr = (struct U8Header *)u8_archive;
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if (arcHdr->fcc != 0x55AA382D)
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{
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return NULL;
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}
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return arcHdr;
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}
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const u8 *u8_get_file_by_index(const u8 *archive, u32 index, u32 *size)
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{
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struct U8Header *arcHdr = open_u8_archive(archive);
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if (arcHdr == NULL) return NULL;
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const struct U8Entry *fst = (const struct U8Entry *)(archive + arcHdr->rootNodeOffset);
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if (index < 1 || index >= fst[0].numEntries) return NULL;
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if (fst[index].fileType != 0) return NULL; // Not a file, but a directory entry
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*size = fst[index].fileLength;
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return archive + fst[index].fileOffset;
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}
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const u8 *u8_get_file(const u8 *archive, const char *filename, u32 *size)
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{
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u32 i = 0;
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struct U8Header *arcHdr = open_u8_archive(archive);
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if (arcHdr == NULL) return NULL;
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const struct U8Entry *fst = (const struct U8Entry *)(archive + arcHdr->rootNodeOffset);
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for (i = 1; i < fst[0].numEntries; ++i)
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if (fst[i].fileType == 0 && strcasecmp(u8Filename(fst, i), filename) == 0)
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break;
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if (i >= fst[0].numEntries)
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return NULL;
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*size = fst[i].fileLength;
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return archive + fst[i].fileOffset;
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} |