ref: a847d7a53d64b1f7d11eb3b969c2684ea0aa399b
dir: /sys/src/cmd/aux/antiword/fontlist.c/
/* * fontlist.c * Copyright (C) 1998-2004 A.J. van Os; Released under GNU GPL * * Description: * Build, read and destroy a list of Word font information */ #include <stdlib.h> #include <stddef.h> #include "antiword.h" /* * Private structure to hide the way the information * is stored from the rest of the program */ typedef struct font_desc_tag { font_block_type tInfo; struct font_desc_tag *pNext; } font_mem_type; /* Variables needed to write the Font Information List */ static font_mem_type *pAnchor = NULL; static font_mem_type *pFontLast = NULL; /* * vDestroyFontInfoList - destroy the Font Information List */ void vDestroyFontInfoList(void) { font_mem_type *pCurr, *pNext; DBG_MSG("vDestroyFontInfoList"); /* Free the Font Information List */ pCurr = pAnchor; while (pCurr != NULL) { pNext = pCurr->pNext; pCurr = xfree(pCurr); pCurr = pNext; } pAnchor = NULL; /* Reset all control variables */ pFontLast = NULL; } /* end of vDestroyFontInfoList */ /* * vCorrectFontValues - correct font values to values Antiword can use */ void vCorrectFontValues(font_block_type *pFontBlock) { UINT uiRealSize; USHORT usRealStyle; uiRealSize = pFontBlock->usFontSize; usRealStyle = pFontBlock->usFontStyle; if (bIsSmallCapitals(pFontBlock->usFontStyle)) { /* Small capitals become normal capitals in a smaller font */ uiRealSize = (uiRealSize * 4 + 2) / 5; usRealStyle &= ~FONT_SMALL_CAPITALS; usRealStyle |= FONT_CAPITALS; } if (bIsSuperscript(pFontBlock->usFontStyle) || bIsSubscript(pFontBlock->usFontStyle)) { /* Superscript and subscript use a smaller fontsize */ uiRealSize = (uiRealSize * 2 + 1) / 3; } if (uiRealSize < MIN_FONT_SIZE) { DBG_DEC(uiRealSize); uiRealSize = MIN_FONT_SIZE; } else if (uiRealSize > MAX_FONT_SIZE) { DBG_DEC(uiRealSize); uiRealSize = MAX_FONT_SIZE; } pFontBlock->usFontSize = (USHORT)uiRealSize; if (pFontBlock->ucFontColor == 8) { /* White text to light gray text */ pFontBlock->ucFontColor = 16; } pFontBlock->usFontStyle = usRealStyle; } /* end of vCorrectFontValues */ /* * vAdd2FontInfoList - Add an element to the Font Information List */ void vAdd2FontInfoList(const font_block_type *pFontBlock) { font_mem_type *pListMember; fail(pFontBlock == NULL); NO_DBG_MSG("bAdd2FontInfoList"); if (pFontBlock->ulFileOffset == FC_INVALID) { /* * This offset is really past the end of the file, * so don't waste any memory by storing it. */ return; } NO_DBG_HEX(pFontBlock->ulFileOffset); NO_DBG_DEC_C(pFontBlock->ucFontNumber != 0, pFontBlock->ucFontNumber); NO_DBG_DEC_C(pFontBlock->usFontSize != DEFAULT_FONT_SIZE, pFontBlock->usFontSize); NO_DBG_DEC_C(pFontBlock->ucFontColor != 0, pFontBlock->ucFontColor); NO_DBG_HEX_C(pFontBlock->usFontStyle != 0x00, pFontBlock->usFontStyle); if (pFontLast != NULL && pFontLast->tInfo.ulFileOffset == pFontBlock->ulFileOffset) { /* * If two consecutive fonts share the same * offset, remember only the last font */ fail(pFontLast->pNext != NULL); pFontLast->tInfo = *pFontBlock; return; } /* Create list member */ pListMember = xmalloc(sizeof(font_mem_type)); /* Fill the list member */ pListMember->tInfo = *pFontBlock; pListMember->pNext = NULL; /* Correct the values where needed */ vCorrectFontValues(&pListMember->tInfo); /* Add the new member to the list */ if (pAnchor == NULL) { pAnchor = pListMember; } else { fail(pFontLast == NULL); pFontLast->pNext = pListMember; } pFontLast = pListMember; } /* end of vAdd2FontInfoList */ /* * Get the record that follows the given recored in the Font Information List */ const font_block_type * pGetNextFontInfoListItem(const font_block_type *pCurr) { const font_mem_type *pRecord; size_t tOffset; if (pCurr == NULL) { if (pAnchor == NULL) { /* There are no records */ return NULL; } /* The first record is the only one without a predecessor */ return &pAnchor->tInfo; } tOffset = offsetof(font_mem_type, tInfo); /* Many casts to prevent alignment warnings */ pRecord = (font_mem_type *)(void *)((char *)pCurr - tOffset); fail(pCurr != &pRecord->tInfo); if (pRecord->pNext == NULL) { /* The last record has no successor */ return NULL; } return &pRecord->pNext->tInfo; } /* end of pGetNextFontInfoListItem */