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#include <fitz.h>
#include <mupdf.h>
static char *password = "";
static int dodecode = 0;
static int dorepair = 0;
static int doprintxref = 0;
void usage()
{
fprintf(stderr, "usage: pdfdebug [-drx] [-u password] file.pdf [oid ...]\n");
exit(1);
}
/*
* Debug-print stream contents
*/
static int safecol = 0;
void printsafe(unsigned char *buf, int n)
{
int i;
for (i = 0; i < n; i++) {
if (buf[i] == '\r' || buf[i] == '\n') {
printf("\n");
safecol = 0;
}
else if (buf[i] < 32 || buf[i] > 126) {
printf(".");
safecol ++;
}
else {
printf("%c", buf[i]);
safecol ++;
}
if (safecol == 79) {
printf("\n");
safecol = 0;
}
}
}
void decodestream(pdf_xref *xref, fz_obj *stream, int oid, int gid, int ofs)
{
fz_error *error;
unsigned char buf[512];
safecol = 0;
error = pdf_openstream0(xref, stream, oid, gid, ofs);
if (error) fz_abort(error);
while (1)
{
int n = fz_read(xref->file, buf, sizeof buf);
if (n == 0)
break;
if (n < 0)
fz_abort(fz_ferror(xref->file));
printsafe(buf, n);
}
pdf_closestream(xref);
}
void copystream(pdf_xref *xref, fz_obj *stream, int ofs)
{
fz_error *error;
unsigned char buf[512];
fz_filter *filter;
fz_obj *obj;
int len;
safecol = 0;
obj = fz_dictgets(stream, "Length");
error = pdf_resolve(&obj, xref);
if (error) fz_abort(error);
len = fz_toint(obj);
fz_dropobj(obj);
error = fz_newnullfilter(&filter, len);
if (error) fz_abort(error);
fz_seek(xref->file, ofs);
error = fz_pushfilter(xref->file, filter);
if (error) fz_abort(error);
while (1)
{
int n = fz_read(xref->file, buf, sizeof buf);
if (n == 0)
break;
if (n < 0)
fz_abort(fz_ferror(xref->file));
printsafe(buf, n);
}
fz_popfilter(xref->file);
}
void printobject(pdf_xref *xref, int oid, int gid)
{
fz_error *error;
int stmofs;
fz_obj *obj;
error = pdf_loadobject0(&obj, xref, oid, gid, &stmofs);
if (error) fz_abort(error);
printf("%d %d obj\n", oid, gid);
fz_debugobj(obj);
printf("\n");
if (stmofs != -1) {
printf("stream\n");
if (dodecode)
decodestream(xref, obj, oid, gid, stmofs);
else
copystream(xref, obj, stmofs);
printf("endstream\n");
}
printf("endobj\n");
fz_dropobj(obj);
}
int main(int argc, char **argv)
{
fz_error *error;
char *filename;
pdf_xref *xref;
int c;
while ((c = getopt(argc, argv, "drxopu:")) != -1)
{
switch (c)
{
case 'd':
dodecode ++;
break;
case 'r':
dorepair ++;
break;
case 'x':
doprintxref ++;
break;
case 'u':
password = optarg;
break;
default:
usage();
}
}
if (argc - optind == 0)
usage();
filename = argv[optind++];
error = pdf_newxref(&xref);
if (error)
fz_abort(error);
if (dorepair)
error = pdf_repairxref(xref, filename);
else
error = pdf_openxref(xref, filename);
if (error)
fz_abort(error);
error = pdf_decryptxref(xref);
if (error)
fz_abort(error);
if (xref->crypt)
{
error = pdf_setpassword(xref->crypt, password);
if (error) fz_abort(error);
}
if (doprintxref)
pdf_debugxref(xref);
if (optind == argc)
{
printf("trailer\n");
fz_debugobj(xref->trailer);
printf("\n");
}
for ( ; optind < argc; optind++)
{
printobject(xref, atoi(argv[optind]), 0);
printf("\n");
}
pdf_closexref(xref);
return 0;
}
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