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/*
Copyright 1996-2017 Han The Thanh, <thanh@pdftex.org>
This file is part of pdfTeX.
pdfTeX is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
pdfTeX is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <w2c/config.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <aconf.h>
#include <GString.h>
#include <gmem.h>
#include <gfile.h>
#include <assert.h>
#include "Object.h"
#include "Stream.h"
#include "Lexer.h"
#include "Parser.h"
#include "Array.h"
#include "Dict.h"
#include "XRef.h"
#include "Catalog.h"
#include "Page.h"
#include "GfxFont.h"
#include "PDFDoc.h"
#include "GlobalParams.h"
#include "Error.h"
static XRef *xref = 0;
int main(int argc, char *argv[])
{
char *p, buf[1024];
PDFDoc *doc;
GString *fileName;
Stream *s;
Object srcStream, srcName, catalogDict;
FILE *outfile;
char *outname;
int objnum = 0, objgen = 0;
bool extract_xref_table = false;
int c;
fprintf(stderr, "pdftosrc version %s\n", xpdfVersion);
if (argc < 2) {
fprintf(stderr,
"Usage: pdftosrc <PDF-file> [<stream-object-number>]\n");
exit(1);
}
fileName = new GString(argv[1]);
globalParams = new GlobalParams();
doc = new PDFDoc(fileName);
if (!doc->isOk()) {
fprintf(stderr, "Invalid PDF file\n");
exit(1);
}
if (argc >= 3) {
objnum = atoi(argv[2]);
if (argc >= 4)
objgen = atoi(argv[3]);
}
xref = doc->getXRef();
catalogDict.initNull();
xref->getCatalog(&catalogDict);
if (!catalogDict.isDict("Catalog")) {
fprintf(stderr, "No Catalog found\n");
exit(1);
}
srcStream.initNull();
if (objnum == 0) {
catalogDict.dictLookup("SourceObject", &srcStream);
static char const_SourceFile[] = "SourceFile";
if (!srcStream.isStream(const_SourceFile)) {
fprintf(stderr, "No SourceObject found\n");
exit(1);
}
srcName.initNull();
srcStream.getStream()->getDict()->lookup("SourceName", &srcName);
if (!srcName.isString()) {
fprintf(stderr, "No SourceName found\n");
exit(1);
}
outname = srcName.getString()->getCString();
// We cannot free srcName, as objname shares its string.
// srcName.free();
} else if (objnum > 0) {
xref->fetch(objnum, objgen, &srcStream);
if (!srcStream.isStream()) {
fprintf(stderr, "Not a Stream object\n");
exit(1);
}
sprintf(buf, "%s", fileName->getCString());
if ((p = strrchr(buf, '.')) == 0)
p = strchr(buf, 0);
if (objgen == 0)
sprintf(p, ".%i", objnum);
else
sprintf(p, ".%i+%i", objnum, objgen);
outname = buf;
} else { // objnum < 0 means we are extracting the XRef table
extract_xref_table = true;
sprintf(buf, "%s", fileName->getCString());
if ((p = strrchr(buf, '.')) == 0)
p = strchr(buf, 0);
sprintf(p, ".xref");
outname = buf;
}
if (!(outfile = fopen(outname, "wb"))) {
fprintf(stderr, "Cannot open file \"%s\" for writing\n", outname);
exit(1);
}
if (extract_xref_table) {
int size = xref->getNumObjects();
int i;
for (i = 0; i < size; i++) {
if (xref->getEntry(i)->offset == 0xffffffff)
break;
}
size = i;
fprintf(outfile, "xref\n");
fprintf(outfile, "0 %i\n", size);
for (i = 0; i < size; i++) {
XRefEntry *e = xref->getEntry(i);
if (e->type != xrefEntryCompressed)
fprintf(outfile, "%.10lu %.5i %s\n",
(long unsigned) e->offset, e->gen,
(e->type == xrefEntryFree ? "f" : "n"));
else { // e->offset is the object number of the object stream
Stream *str;
Lexer *lexer;
Parser *parser;
Object objStr, obj1, obj2;
int nObjects, first, n;
int localOffset = 0;
Guint firstOffset;
assert(xref->fetch(e->offset, 0, &objStr)->isStream());
nObjects = objStr.streamGetDict()->lookup("N", &obj1)->getInt();
obj1.free();
first = objStr.streamGetDict()->lookup("First", &obj1)->getInt();
obj1.free();
firstOffset = objStr.getStream()->getBaseStream()->getStart() + first;
// parse the header: object numbers and offsets
objStr.streamReset();
obj1.initNull();
str = new EmbedStream(objStr.getStream(), &obj1, gTrue, first);
lexer = new Lexer(xref, str);
parser = new Parser(xref, lexer, gFalse);
for (n = 0; n < nObjects; ++n) {
parser->getObj(&obj1);
parser->getObj(&obj2);
if (n == e->gen)
localOffset = obj2.getInt();
obj1.free();
obj2.free();
}
#if defined(XPDF304)
while (str->getChar() != EOF) ;
#else /* xpdf 4.00 */
lexer->skipToEOF();
#endif
delete parser;
objStr.free();
fprintf(outfile, "%.10lu 00000 n\n",
(long unsigned)(firstOffset + localOffset));
}
}
} else {
s = srcStream.getStream();
s->reset();
while ((c = s->getChar()) != EOF)
fputc(c, outfile);
srcStream.free();
}
if (objnum == 0)
fprintf(stderr, "Source file extracted to %s\n", outname);
else if (objnum > 0)
fprintf(stderr, "Stream object extracted to %s\n", outname);
else
fprintf(stderr, "Cross-reference table extracted to %s\n", outname);
fclose(outfile);
catalogDict.free();
delete doc;
delete globalParams;
}
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