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/*
* pdfshow -- the ultimate pdf debugging tool
*/
#include "fitz.h"
#include "mupdf.h"
static pdf_document *doc = NULL;
static fz_context *ctx = NULL;
static int showbinary = 0;
static int showdecode = 1;
static int showcolumn;
static void usage(void)
{
fprintf(stderr, "usage: pdfshow [options] file.pdf [grepable] [xref] [trailer] [pagetree] [object numbers]\n");
fprintf(stderr, "\t-b\tprint streams as binary data\n");
fprintf(stderr, "\t-e\tprint encoded streams (don't decode)\n");
fprintf(stderr, "\t-p\tpassword\n");
exit(1);
}
static void showtrailer(void)
{
if (!doc)
fz_throw(ctx, "no file specified");
printf("trailer\n");
pdf_debug_obj(doc->trailer);
printf("\n");
}
static void showxref(void)
{
if (!doc)
fz_throw(ctx, "no file specified");
pdf_debug_xref(doc);
printf("\n");
}
static void showpagetree(void)
{
pdf_obj *ref;
int count;
int i;
if (!doc)
fz_throw(ctx, "no file specified");
count = pdf_count_pages(doc);
for (i = 0; i < count; i++)
{
ref = doc->page_refs[i];
printf("page %d = %d %d R\n", i + 1, pdf_to_num(ref), pdf_to_gen(ref));
}
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_stream *stm;
unsigned char buf[2048];
int n;
showcolumn = 0;
if (showdecode)
stm = pdf_open_stream(doc, num, gen);
else
stm = pdf_open_raw_stream(doc, num, gen);
while (1)
{
n = fz_read(stm, buf, sizeof buf);
if (n == 0)
break;
if (showbinary)
fwrite(buf, 1, n, stdout);
else
showsafe(buf, n);
}
fz_close(stm);
}
static void showobject(int num, int gen)
{
pdf_obj *obj;
if (!doc)
fz_throw(ctx, "no file specified");
obj = pdf_load_object(doc, num, gen);
if (pdf_is_stream(doc, num, gen))
{
if (showbinary)
{
showstream(num, gen);
}
else
{
printf("%d %d obj\n", num, gen);
pdf_debug_obj(obj);
printf("stream\n");
showstream(num, gen);
printf("endstream\n");
printf("endobj\n\n");
}
}
else
{
printf("%d %d obj\n", num, gen);
pdf_debug_obj(obj);
printf("endobj\n\n");
}
pdf_drop_obj(obj);
}
static void showgrep(char *filename)
{
pdf_obj *obj;
int i;
for (i = 0; i < doc->len; i++)
{
if (doc->table[i].type == 'n' || doc->table[i].type == 'o')
{
fz_try(ctx)
{
obj = pdf_load_object(doc, i, 0);
}
fz_catch(ctx)
{
fz_warn(ctx, "skipping object (%d 0 R)", i);
continue;
}
pdf_sort_dict(obj);
printf("%s:%d: ", filename, i);
pdf_fprint_obj(stdout, obj, 1);
pdf_drop_obj(obj);
}
}
printf("%s:trailer: ", filename);
pdf_fprint_obj(stdout, doc->trailer, 1);
}
#ifdef MUPDF_COMBINED_EXE
int pdfshow_main(int argc, char **argv)
#else
int main(int argc, char **argv)
#endif
{
char *password = NULL; /* don't throw errors if encrypted */
char *filename;
int c;
while ((c = fz_getopt(argc, argv, "p:be")) != -1)
{
switch (c)
{
case 'p': password = fz_optarg; break;
case 'b': showbinary = 1; break;
case 'e': showdecode = 0; break;
default: usage(); break;
}
}
if (fz_optind == argc)
usage();
filename = argv[fz_optind++];
ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
if (!ctx)
{
fprintf(stderr, "cannot initialise context\n");
exit(1);
}
fz_var(doc);
fz_try(ctx)
{
doc = pdf_open_document(ctx, filename);
if (pdf_needs_password(doc))
if (!pdf_authenticate_password(doc, password))
fz_throw(ctx, "cannot authenticate password: %s", filename);
if (fz_optind == argc)
showtrailer();
while (fz_optind < argc)
{
switch (argv[fz_optind][0])
{
case 't': showtrailer(); break;
case 'x': showxref(); break;
case 'p': showpagetree(); break;
case 'g': showgrep(filename); break;
default: showobject(atoi(argv[fz_optind]), 0); break;
}
fz_optind++;
}
}
fz_catch(ctx)
{
}
pdf_close_document(doc);
fz_free_context(ctx);
return 0;
}
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