1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#include "../../../include/fpdfapi/fpdf_module.h"
8#include "../../../include/fpdfapi/fpdf_resource.h"
9#include "../../../include/fxcodec/fx_codec.h"
10#include "font_int.h"
11#ifndef _FPDFAPI_MINI_
12typedef struct {
13    FXSYS_FILE*	m_pFile;
14    int		m_nFiles;
15    int		m_IndexSize;
16    int		m_IndexOffset;
17} FXFC_PACKAGE;
18FX_LPVOID FXFC_LoadPackage(FX_LPCSTR name)
19{
20    FXSYS_FILE* file = FXSYS_fopen(name, (FX_LPCSTR)"rb");
21    if (file == NULL) {
22        return NULL;
23    }
24    FX_BYTE buf[256];
25    size_t read = FXSYS_fread(buf, 1, 20, file);
26    if (*(FX_DWORD*)buf != 0x43465846) {
27        FXSYS_fclose(file);
28        return NULL;
29    }
30    FXFC_PACKAGE* pPackage = FX_Alloc(FXFC_PACKAGE, 1);
31    pPackage->m_pFile = file;
32    pPackage->m_nFiles = *(int*)(buf + 8);
33    pPackage->m_IndexSize = *(int*)(buf + 12);
34    pPackage->m_IndexOffset = *(int*)(buf + 16);
35    return pPackage;
36}
37void FXFC_ClosePackage(FX_LPVOID p)
38{
39    FXFC_PACKAGE* pPackage = (FXFC_PACKAGE*)p;
40    FXSYS_fclose(pPackage->m_pFile);
41    FX_Free(pPackage);
42}
43FX_BOOL FXFC_LoadFile(FX_LPVOID p, FX_LPCSTR name, FX_LPBYTE& pBuffer, FX_DWORD& size)
44{
45    FXFC_PACKAGE* pPackage = (FXFC_PACKAGE*)p;
46    FXSYS_fseek(pPackage->m_pFile, pPackage->m_IndexOffset, FXSYS_SEEK_SET);
47    FX_BYTE buf[128];
48    size_t read = 0;
49    for (int i = 0; i < pPackage->m_nFiles; i ++) {
50        read = FXSYS_fread(buf, pPackage->m_IndexSize, 1, pPackage->m_pFile);
51        if (FXSYS_stricmp((FX_LPCSTR)buf, name) == 0) {
52            FX_DWORD offset = *(FX_DWORD*)&buf[64];
53            size = *(FX_DWORD*)&buf[68];
54            pBuffer = FX_Alloc(FX_BYTE, size);
55            FXSYS_fseek(pPackage->m_pFile, offset, FXSYS_SEEK_SET);
56            read = FXSYS_fread(pBuffer, size, 1, pPackage->m_pFile);
57            if (buf[72]) {
58                FX_DWORD orig_size;
59                FX_LPBYTE comp_buf = pBuffer;
60                CPDF_ModuleMgr::Get()->GetFlateModule()->FlateOrLZWDecode(FALSE, comp_buf, size, FALSE,
61                        0, 0, 0, 0, 0, pBuffer, orig_size);
62                FX_Free(comp_buf);
63                size = orig_size;
64            }
65            return TRUE;
66        }
67    }
68    return FALSE;
69}
70FX_BOOL CPDF_FXMP::LoadFile(FX_LPVOID pPackage, FX_LPCSTR fileid)
71{
72    if (m_pHeader) {
73        FX_Free(m_pHeader);
74        m_pHeader = NULL;
75    }
76    m_pTable = NULL;
77    FX_DWORD size;
78    if (!FXFC_LoadFile(pPackage, fileid, (FX_LPBYTE&)m_pHeader, size)) {
79        return FALSE;
80    }
81    if (FXSYS_memcmp32(m_pHeader, "FXMP", 4)) {
82        return FALSE;
83    }
84    m_pTable = (FX_LPBYTE)m_pHeader + m_pHeader->dwDataOffset;
85    return TRUE;
86}
87FX_LPBYTE CPDF_FXMP::GetRecord(FX_DWORD index)
88{
89    if (m_pTable == NULL) {
90        return NULL;
91    }
92    if ((int)index < (int)m_pHeader->dwStartIndex || index > m_pHeader->dwEndIndex) {
93        return NULL;
94    }
95    return m_pTable + (index - m_pHeader->dwStartIndex) * m_pHeader->dwRecordSize;
96}
97#endif
98