Commit 39ce4575 authored by Albert Astals Cid's avatar Albert Astals Cid
Browse files

xpdf303: Add FoFiIdentifier

parent 33e7d54b
......@@ -214,6 +214,7 @@ set(poppler_SRCS
fofi/FoFiTrueType.cc
fofi/FoFiType1.cc
fofi/FoFiType1C.cc
fofi/FoFiIdentifier.cc
poppler/Annot.cc
poppler/Array.cc
poppler/BuiltinFont.cc
......@@ -460,6 +461,7 @@ if(ENABLE_XPDF_HEADERS)
fofi/FoFiTrueType.h
fofi/FoFiType1.h
fofi/FoFiType1C.h
fofi/FoFiIdentifier.h
DESTINATION include/poppler/fofi)
if(ENABLE_LIBCURL)
install(FILES
......
//========================================================================
//
// FoFiIdentifier.cc
//
// Copyright 2009 Glyph & Cog, LLC
//
//========================================================================
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include "gtypes.h"
#include "FoFiIdentifier.h"
//------------------------------------------------------------------------
class Reader {
public:
virtual ~Reader() {}
// Read one byte. Returns -1 if past EOF.
virtual int getByte(int pos) = 0;
// Read a big-endian unsigned 16-bit integer. Fills in *val and
// returns true if successful.
virtual GBool getU16BE(int pos, int *val) = 0;
// Read a big-endian unsigned 32-bit integer. Fills in *val and
// returns true if successful.
virtual GBool getU32BE(int pos, Guint *val) = 0;
// Read a little-endian unsigned 32-bit integer. Fills in *val and
// returns true if successful.
virtual GBool getU32LE(int pos, Guint *val) = 0;
// Read a big-endian unsigned <size>-byte integer, where 1 <= size
// <= 4. Fills in *val and returns true if successful.
virtual GBool getUVarBE(int pos, int size, Guint *val) = 0;
// Compare against a string. Returns true if equal.
virtual GBool cmp(int pos, const char *s) = 0;
};
//------------------------------------------------------------------------
class MemReader: public Reader {
public:
static MemReader *make(char *bufA, int lenA);
virtual ~MemReader();
virtual int getByte(int pos);
virtual GBool getU16BE(int pos, int *val);
virtual GBool getU32BE(int pos, Guint *val);
virtual GBool getU32LE(int pos, Guint *val);
virtual GBool getUVarBE(int pos, int size, Guint *val);
virtual GBool cmp(int pos, const char *s);
private:
MemReader(char *bufA, int lenA);
char *buf;
int len;
};
MemReader *MemReader::make(char *bufA, int lenA) {
return new MemReader(bufA, lenA);
}
MemReader::MemReader(char *bufA, int lenA) {
buf = bufA;
len = lenA;
}
MemReader::~MemReader() {
}
int MemReader::getByte(int pos) {
if (pos < 0 || pos >= len) {
return -1;
}
return buf[pos] & 0xff;
}
GBool MemReader::getU16BE(int pos, int *val) {
if (pos < 0 || pos > len - 2) {
return gFalse;
}
*val = ((buf[pos] & 0xff) << 8) +
(buf[pos+1] & 0xff);
return gTrue;
}
GBool MemReader::getU32BE(int pos, Guint *val) {
if (pos < 0 || pos > len - 4) {
return gFalse;
}
*val = ((buf[pos] & 0xff) << 24) +
((buf[pos+1] & 0xff) << 16) +
((buf[pos+2] & 0xff) << 8) +
(buf[pos+3] & 0xff);
return gTrue;
}
GBool MemReader::getU32LE(int pos, Guint *val) {
if (pos < 0 || pos > len - 4) {
return gFalse;
}
*val = (buf[pos] & 0xff) +
((buf[pos+1] & 0xff) << 8) +
((buf[pos+2] & 0xff) << 16) +
((buf[pos+3] & 0xff) << 24);
return gTrue;
}
GBool MemReader::getUVarBE(int pos, int size, Guint *val) {
int i;
if (size < 1 || size > 4 || pos < 0 || pos > len - size) {
return gFalse;
}
*val = 0;
for (i = 0; i < size; ++i) {
*val = (*val << 8) + (buf[pos + i] & 0xff);
}
return gTrue;
}
GBool MemReader::cmp(int pos, const char *s) {
int n;
n = (int)strlen(s);
if (pos < 0 || len < n || pos > len - n) {
return gFalse;
}
return !memcmp(buf + pos, s, n);
}
//------------------------------------------------------------------------
class FileReader: public Reader {
public:
static FileReader *make(char *fileName);
virtual ~FileReader();
virtual int getByte(int pos);
virtual GBool getU16BE(int pos, int *val);
virtual GBool getU32BE(int pos, Guint *val);
virtual GBool getU32LE(int pos, Guint *val);
virtual GBool getUVarBE(int pos, int size, Guint *val);
virtual GBool cmp(int pos, const char *s);
private:
FileReader(FILE *fA);
GBool fillBuf(int pos, int len);
FILE *f;
char buf[1024];
int bufPos, bufLen;
};
FileReader *FileReader::make(char *fileName) {
FILE *fA;
if (!(fA = fopen(fileName, "rb"))) {
return NULL;
}
return new FileReader(fA);
}
FileReader::FileReader(FILE *fA) {
f = fA;
bufPos = 0;
bufLen = 0;
}
FileReader::~FileReader() {
fclose(f);
}
int FileReader::getByte(int pos) {
if (!fillBuf(pos, 1)) {
return -1;
}
return buf[pos - bufPos] & 0xff;
}
GBool FileReader::getU16BE(int pos, int *val) {
if (!fillBuf(pos, 2)) {
return gFalse;
}
*val = ((buf[pos - bufPos] & 0xff) << 8) +
(buf[pos - bufPos + 1] & 0xff);
return gTrue;
}
GBool FileReader::getU32BE(int pos, Guint *val) {
if (!fillBuf(pos, 4)) {
return gFalse;
}
*val = ((buf[pos - bufPos] & 0xff) << 24) +
((buf[pos - bufPos + 1] & 0xff) << 16) +
((buf[pos - bufPos + 2] & 0xff) << 8) +
(buf[pos - bufPos + 3] & 0xff);
return gTrue;
}
GBool FileReader::getU32LE(int pos, Guint *val) {
if (!fillBuf(pos, 4)) {
return gFalse;
}
*val = (buf[pos - bufPos] & 0xff) +
((buf[pos - bufPos + 1] & 0xff) << 8) +
((buf[pos - bufPos + 2] & 0xff) << 16) +
((buf[pos - bufPos + 3] & 0xff) << 24);
return gTrue;
}
GBool FileReader::getUVarBE(int pos, int size, Guint *val) {
int i;
if (size < 1 || size > 4 || !fillBuf(pos, size)) {
return gFalse;
}
*val = 0;
for (i = 0; i < size; ++i) {
*val = (*val << 8) + (buf[pos - bufPos + i] & 0xff);
}
return gTrue;
}
GBool FileReader::cmp(int pos, const char *s) {
int n;
n = (int)strlen(s);
if (!fillBuf(pos, n)) {
return gFalse;
}
return !memcmp(buf - bufPos + pos, s, n);
}
GBool FileReader::fillBuf(int pos, int len) {
if (pos < 0 || len < 0 || len > (int)sizeof(buf) ||
pos > INT_MAX - (int)sizeof(buf)) {
return gFalse;
}
if (pos >= bufPos && pos + len <= bufPos + bufLen) {
return gTrue;
}
if (fseek(f, pos, SEEK_SET)) {
return gFalse;
}
bufPos = pos;
bufLen = (int)fread(buf, 1, sizeof(buf), f);
if (bufLen < len) {
return gFalse;
}
return gTrue;
}
//------------------------------------------------------------------------
class StreamReader: public Reader {
public:
static StreamReader *make(int (*getCharA)(void *data), void *dataA);
virtual ~StreamReader();
virtual int getByte(int pos);
virtual GBool getU16BE(int pos, int *val);
virtual GBool getU32BE(int pos, Guint *val);
virtual GBool getU32LE(int pos, Guint *val);
virtual GBool getUVarBE(int pos, int size, Guint *val);
virtual GBool cmp(int pos, const char *s);
private:
StreamReader(int (*getCharA)(void *data), void *dataA);
GBool fillBuf(int pos, int len);
int (*getChar)(void *data);
void *data;
int streamPos;
char buf[1024];
int bufPos, bufLen;
};
StreamReader *StreamReader::make(int (*getCharA)(void *data), void *dataA) {
return new StreamReader(getCharA, dataA);
}
StreamReader::StreamReader(int (*getCharA)(void *data), void *dataA) {
getChar = getCharA;
data = dataA;
streamPos = 0;
bufPos = 0;
bufLen = 0;
}
StreamReader::~StreamReader() {
}
int StreamReader::getByte(int pos) {
if (!fillBuf(pos, 1)) {
return -1;
}
return buf[pos - bufPos] & 0xff;
}
GBool StreamReader::getU16BE(int pos, int *val) {
if (!fillBuf(pos, 2)) {
return gFalse;
}
*val = ((buf[pos - bufPos] & 0xff) << 8) +
(buf[pos - bufPos + 1] & 0xff);
return gTrue;
}
GBool StreamReader::getU32BE(int pos, Guint *val) {
if (!fillBuf(pos, 4)) {
return gFalse;
}
*val = ((buf[pos - bufPos] & 0xff) << 24) +
((buf[pos - bufPos + 1] & 0xff) << 16) +
((buf[pos - bufPos + 2] & 0xff) << 8) +
(buf[pos - bufPos + 3] & 0xff);
return gTrue;
}
GBool StreamReader::getU32LE(int pos, Guint *val) {
if (!fillBuf(pos, 4)) {
return gFalse;
}
*val = (buf[pos - bufPos] & 0xff) +
((buf[pos - bufPos + 1] & 0xff) << 8) +
((buf[pos - bufPos + 2] & 0xff) << 16) +
((buf[pos - bufPos + 3] & 0xff) << 24);
return gTrue;
}
GBool StreamReader::getUVarBE(int pos, int size, Guint *val) {
int i;
if (size < 1 || size > 4 || !fillBuf(pos, size)) {
return gFalse;
}
*val = 0;
for (i = 0; i < size; ++i) {
*val = (*val << 8) + (buf[pos - bufPos + i] & 0xff);
}
return gTrue;
}
GBool StreamReader::cmp(int pos, const char *s) {
int n;
n = (int)strlen(s);
if (!fillBuf(pos, n)) {
return gFalse;
}
return !memcmp(buf - bufPos + pos, s, n);
}
GBool StreamReader::fillBuf(int pos, int len) {
int c;
if (pos < 0 || len < 0 || len > (int)sizeof(buf) ||
pos > INT_MAX - (int)sizeof(buf)) {
return gFalse;
}
if (pos < bufPos) {
return gFalse;
}
// if requested region will not fit in the current buffer...
if (pos + len > bufPos + (int)sizeof(buf)) {
// if the start of the requested data is already in the buffer, move
// it to the start of the buffer
if (pos < bufPos + bufLen) {
bufLen -= pos - bufPos;
memmove(buf, buf + (pos - bufPos), bufLen);
bufPos = pos;
// otherwise discard data from the
// stream until we get to the requested position
} else {
bufPos += bufLen;
bufLen = 0;
while (bufPos < pos) {
if ((c = (*getChar)(data)) < 0) {
return gFalse;
}
++bufPos;
}
}
}
// read the rest of the requested data
while (bufPos + bufLen < pos + len) {
if ((c = (*getChar)(data)) < 0) {
return gFalse;
}
buf[bufLen++] = (char)c;
}
return gTrue;
}
//------------------------------------------------------------------------
static FoFiIdentifierType identify(Reader *reader);
static FoFiIdentifierType identifyOpenType(Reader *reader);
static FoFiIdentifierType identifyCFF(Reader *reader, int start);
FoFiIdentifierType FoFiIdentifier::identifyMem(char *file, int len) {
MemReader *reader;
FoFiIdentifierType type;
if (!(reader = MemReader::make(file, len))) {
return fofiIdError;
}
type = identify(reader);
delete reader;
return type;
}
FoFiIdentifierType FoFiIdentifier::identifyFile(char *fileName) {
FileReader *reader;
FoFiIdentifierType type;
if (!(reader = FileReader::make(fileName))) {
return fofiIdError;
}
type = identify(reader);
delete reader;
return type;
}
FoFiIdentifierType FoFiIdentifier::identifyStream(int (*getChar)(void *data),
void *data) {
StreamReader *reader;
FoFiIdentifierType type;
if (!(reader = StreamReader::make(getChar, data))) {
return fofiIdError;
}
type = identify(reader);
delete reader;
return type;
}
static FoFiIdentifierType identify(Reader *reader) {
Guint n;
//----- PFA
if (reader->cmp(0, "%!PS-AdobeFont-1") ||
reader->cmp(0, "%!FontType1")) {
return fofiIdType1PFA;
}
//----- PFB
if (reader->getByte(0) == 0x80 &&
reader->getByte(1) == 0x01 &&
reader->getU32LE(2, &n)) {
if ((n >= 16 && reader->cmp(6, "%!PS-AdobeFont-1")) ||
(n >= 11 && reader->cmp(6, "%!FontType1"))) {
return fofiIdType1PFB;
}
}
//----- TrueType
if ((reader->getByte(0) == 0x00 &&
reader->getByte(1) == 0x01 &&
reader->getByte(2) == 0x00 &&
reader->getByte(3) == 0x00) ||
(reader->getByte(0) == 0x74 && // 'true'
reader->getByte(1) == 0x72 &&
reader->getByte(2) == 0x75 &&
reader->getByte(3) == 0x65)) {
return fofiIdTrueType;
}
if (reader->getByte(0) == 0x74 && // 'ttcf'
reader->getByte(1) == 0x74 &&
reader->getByte(2) == 0x63 &&
reader->getByte(3) == 0x66) {
return fofiIdTrueTypeCollection;
}
//----- OpenType
if (reader->getByte(0) == 0x4f && // 'OTTO
reader->getByte(1) == 0x54 &&
reader->getByte(2) == 0x54 &&
reader->getByte(3) == 0x4f) {
return identifyOpenType(reader);
}
//----- CFF
if (reader->getByte(0) == 0x01 &&
reader->getByte(1) == 0x00) {
return identifyCFF(reader, 0);
}
// some tools embed CFF fonts with an extra whitespace char at the
// beginning
if (reader->getByte(1) == 0x01 &&
reader->getByte(2) == 0x00) {
return identifyCFF(reader, 1);
}
return fofiIdUnknown;
}
static FoFiIdentifierType identifyOpenType(Reader *reader) {
FoFiIdentifierType type;
Guint offset;
int nTables, i;
if (!reader->getU16BE(4, &nTables)) {
return fofiIdUnknown;
}
for (i = 0; i < nTables; ++i) {
if (reader->cmp(12 + i*16, "CFF ")) {
if (reader->getU32BE(12 + i*16 + 8, &offset) &&
offset < (Guint)INT_MAX) {
type = identifyCFF(reader, (int)offset);
if (type == fofiIdCFF8Bit) {
type = fofiIdOpenTypeCFF8Bit;
} else if (type == fofiIdCFFCID) {
type = fofiIdOpenTypeCFFCID;
}
return type;
}
return fofiIdUnknown;
}
}
return fofiIdUnknown;
}
static FoFiIdentifierType identifyCFF(Reader *reader, int start) {
Guint offset0, offset1;
int hdrSize, offSize0, offSize1, pos, endPos, b0, n, i;
//----- read the header
if (reader->getByte(start) != 0x01 ||
reader->getByte(start + 1) != 0x00) {
return fofiIdUnknown;
}
if ((hdrSize = reader->getByte(start + 2)) < 0) {
return fofiIdUnknown;
}
if ((offSize0 = reader->getByte(start + 3)) < 1 || offSize0 > 4) {
return fofiIdUnknown;
}
pos = start + hdrSize;
if (pos < 0) {
return fofiIdUnknown;
}
//----- skip the name index
if (!reader->getU16BE(pos, &n)) {
return fofiIdUnknown;
}
if (n == 0) {
pos += 2;
} else {
if ((offSize1 = reader->getByte(pos + 2)) < 1 || offSize1 > 4) {
return fofiIdUnknown;
}
if (!reader->getUVarBE(pos + 3 + n * offSize1, offSize1, &offset1) ||
offset1 > (Guint)INT_MAX) {
return fofiIdUnknown;
}
pos += 3 + (n + 1) * offSize1 + (int)offset1 - 1;
}
if (pos < 0) {
return fofiIdUnknown;
}
//----- parse the top dict index
if (!reader->getU16BE(pos, &n) || n < 1) {
return fofiIdUnknown;
}
if ((offSize1 = reader->getByte(pos + 2)) < 1 || offSize1 > 4) {
return fofiIdUnknown;
}
if (!reader->getUVarBE(pos + 3, offSize1, &offset0) ||
offset0 > (Guint)INT_MAX ||
!reader->getUVarBE(pos + 3 + offSize1, offSize1, &offset1) ||
offset1 > (Guint)INT_MAX ||
offset0 > offset1) {
return fofiIdUnknown;
}