ref: 0f890140f25324aa076b10f146840f6d7dc85a3a
dir: /sys/src/cmd/aux/antiword/depot.c/
/* * depot.c * Copyright (C) 1998-2002 A.J. van Os; Released under GPL * * Description: * Functions to compute the depot offset */ #include "antiword.h" #define SIZE_RATIO (BIG_BLOCK_SIZE/SMALL_BLOCK_SIZE) static ULONG *aulSmallBlockList = NULL; static size_t tSmallBlockListLen = 0; /* * vDestroySmallBlockList - destroy the small block list */ void vDestroySmallBlockList(void) { DBG_MSG("vDestroySmallBlockList"); aulSmallBlockList = xfree(aulSmallBlockList); tSmallBlockListLen = 0; } /* end of vDestroySmalBlockList */ /* * vCreateSmallBlockList - create the small block list * * returns: TRUE when successful, otherwise FALSE */ BOOL bCreateSmallBlockList(ULONG ulStartblock, const ULONG *aulBBD, size_t tBBDLen) { ULONG ulTmp; size_t tSize; int iIndex; fail(aulSmallBlockList != NULL); fail(tSmallBlockListLen != 0); fail(ulStartblock > MAX_BLOCKNUMBER && ulStartblock != END_OF_CHAIN); fail(aulBBD == NULL); fail(tBBDLen == 0); /* Find the length of the small block list */ for (tSmallBlockListLen = 0, ulTmp = ulStartblock; tSmallBlockListLen < tBBDLen && ulTmp != END_OF_CHAIN; tSmallBlockListLen++, ulTmp = aulBBD[ulTmp]) { if (ulTmp >= (ULONG)tBBDLen) { DBG_DEC(ulTmp); DBG_DEC(tBBDLen); werr(1, "The Big Block Depot is damaged"); } } DBG_DEC(tSmallBlockListLen); if (tSmallBlockListLen == 0) { /* There is no small block list */ fail(ulStartblock != END_OF_CHAIN); aulSmallBlockList = NULL; return TRUE; } /* Create the small block list */ tSize = tSmallBlockListLen * sizeof(ULONG); aulSmallBlockList = xmalloc(tSize); for (iIndex = 0, ulTmp = ulStartblock; iIndex < (int)tBBDLen && ulTmp != END_OF_CHAIN; iIndex++, ulTmp = aulBBD[ulTmp]) { if (ulTmp >= (ULONG)tBBDLen) { DBG_DEC(ulTmp); DBG_DEC(tBBDLen); werr(1, "The Big Block Depot is damaged"); } aulSmallBlockList[iIndex] = ulTmp; NO_DBG_DEC(aulSmallBlockList[iIndex]); } return TRUE; } /* end of bCreateSmallBlockList */ /* * ulDepotOffset - get the depot offset the block list */ ULONG ulDepotOffset(ULONG ulIndex, size_t tBlockSize) { ULONG ulTmp; size_t tTmp; fail(ulIndex >= ULONG_MAX / BIG_BLOCK_SIZE); switch (tBlockSize) { case BIG_BLOCK_SIZE: return (ulIndex + 1) * BIG_BLOCK_SIZE; case SMALL_BLOCK_SIZE: tTmp = (size_t)(ulIndex / SIZE_RATIO); ulTmp = ulIndex % SIZE_RATIO; if (aulSmallBlockList == NULL || tTmp >= tSmallBlockListLen) { DBG_HEX(aulSmallBlockList); DBG_DEC(tSmallBlockListLen); DBG_DEC(tTmp); return 0; } return ((aulSmallBlockList[tTmp] + 1) * SIZE_RATIO + ulTmp) * SMALL_BLOCK_SIZE; default: DBG_DEC(tBlockSize); DBG_FIXME(); return 0; } } /* end of ulDepotOffset */