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/*
* pdfshow -- the ultimate pdf debugging tool
*/
#include "pdftool.h"
static int showbinary = 0;
static int showdecode = 0;
static int showcolumn;
static void showusage(void)
{
fprintf(stderr, "usage: pdfshow [-bx] [-p password] <file> [xref] [trailer] [object numbers]\n");
fprintf(stderr, " -b \tprint streams as raw binary data\n");
fprintf(stderr, " -x \tdecompress streams\n");
fprintf(stderr, " -p \tdecrypt password\n");
exit(1);
}
static void showtrailer(void)
{
if (!xref)
die(fz_throw("no file specified"));
printf("trailer\n");
fz_debugobj(xref->trailer);
printf("\n");
}
static void showxref(void)
{
if (!xref)
die(fz_throw("no file specified"));
pdf_debugxref(xref);
printf("\n");
}
static void showsafe(unsigned char *buf, int n)
{
int i;
for (i = 0; i < n; i++) {
if (buf[i] == '\r' || buf[i] == '\n') {
putchar('\n');
showcolumn = 0;
}
else if (buf[i] < 32 || buf[i] > 126) {
putchar('.');
showcolumn ++;
}
else {
putchar(buf[i]);
showcolumn ++;
}
if (showcolumn == 79) {
putchar('\n');
showcolumn = 0;
}
}
}
static void showstream(int num, int gen)
{
fz_error error;
fz_stream *stm;
unsigned char buf[2048];
int n;
showcolumn = 0;
if (showdecode)
error = pdf_openstream(&stm, xref, num, gen);
else
error = pdf_openrawstream(&stm, xref, num, gen);
if (error)
die(error);
while (1)
{
error = fz_read(&n, stm, buf, sizeof buf);
if (error)
die(error);
if (n == 0)
break;
if (showbinary)
fwrite(buf, 1, n, stdout);
else
showsafe(buf, n);
}
fz_dropstream(stm);
}
static void showobject(int num, int gen)
{
fz_error error;
fz_obj *obj;
if (!xref)
die(fz_throw("no file specified"));
error = pdf_loadobject(&obj, xref, num, gen);
if (error)
die(error);
if (pdf_isstream(xref, num, gen))
{
printf("%d %d obj\n", num, gen);
fz_debugobj(obj);
printf("stream\n");
showstream(num, gen);
printf("endstream\n");
printf("endobj\n\n");
}
else
{
printf("%d %d obj\n", num, gen);
fz_debugobj(obj);
printf("endobj\n\n");
}
fz_dropobj(obj);
}
int main(int argc, char **argv)
{
char *password = "";
int c;
while ((c = fz_getopt(argc, argv, "p:bx")) != -1)
{
switch (c)
{
case 'p': password = fz_optarg; break;
case 'b': showbinary ++; break;
case 'x': showdecode ++; break;
default:
showusage();
break;
}
}
if (fz_optind == argc)
showusage();
openxref(argv[fz_optind++], password, 0, 0);
if (fz_optind == argc)
showtrailer();
while (fz_optind < argc)
{
if (!strcmp(argv[fz_optind], "trailer"))
showtrailer();
else if (!strcmp(argv[fz_optind], "xref"))
showxref();
else
showobject(atoi(argv[fz_optind]), 0);
fz_optind++;
}
closexref();
return 0;
}
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