mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-16 09:37:08 +00:00
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
|
|
* This is an example program to demonstrate use of object handle
|
|
* functions in the C API.
|
|
*/
|
|
|
|
#include <qpdf/qpdf-c.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
static char const* whoami = 0;
|
|
|
|
static void usage()
|
|
{
|
|
fprintf(stderr, "Usage: %s infile infile-password outfile\n", whoami);
|
|
exit(2);
|
|
}
|
|
|
|
QPDF_BOOL
|
|
modify_file(qpdf_data qpdf)
|
|
{
|
|
/* This small example performs the following operation on the
|
|
* document catalog (a.k.a. root):
|
|
* - Remove PageLayout
|
|
* - Remove OpenAction
|
|
* - If there are outlines, set PageMode to UseOutlines; otherwise,
|
|
* remove it.
|
|
*/
|
|
|
|
qpdf_oh root = qpdf_get_root(qpdf);
|
|
qpdf_oh_remove_key(qpdf, root, "/PageLayout");
|
|
qpdf_oh_remove_key(qpdf, root, "/OpenAction");
|
|
/* 0 is never a valid qpdf_oh */
|
|
qpdf_oh pagemode = 0;
|
|
if (qpdf_oh_is_dictionary(
|
|
qpdf, qpdf_oh_get_key(qpdf, root, "/PageLabels")))
|
|
{
|
|
pagemode = qpdf_oh_new_name(qpdf, "/UseOutlines");
|
|
}
|
|
else
|
|
{
|
|
pagemode = qpdf_oh_new_null(qpdf);
|
|
}
|
|
qpdf_oh_replace_or_remove_key(qpdf, root, "/PageMode", pagemode);
|
|
|
|
return QPDF_TRUE;
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
char* infile = NULL;
|
|
char* password = NULL;
|
|
char* outfile = NULL;
|
|
qpdf_data qpdf = qpdf_init();
|
|
int warnings = 0;
|
|
int errors = 0;
|
|
char* p = 0;
|
|
|
|
if ((p = strrchr(argv[0], '/')) != NULL)
|
|
{
|
|
whoami = p + 1;
|
|
}
|
|
else if ((p = strrchr(argv[0], '\\')) != NULL)
|
|
{
|
|
whoami = p + 1;
|
|
}
|
|
else
|
|
{
|
|
whoami = argv[0];
|
|
}
|
|
|
|
if (argc != 4)
|
|
{
|
|
usage();
|
|
}
|
|
|
|
infile = argv[1];
|
|
password = argv[2];
|
|
outfile = argv[3];
|
|
|
|
if (((qpdf_read(qpdf, infile, password) & QPDF_ERRORS) == 0) &&
|
|
modify_file(qpdf) &&
|
|
((qpdf_init_write(qpdf, outfile) & QPDF_ERRORS) == 0))
|
|
{
|
|
/* Use static ID for testing only. For production, a
|
|
* non-static ID is used. See also
|
|
* qpdf_set_deterministic_ID. */
|
|
qpdf_set_static_ID(qpdf, QPDF_TRUE); /* for testing only */
|
|
qpdf_write(qpdf);
|
|
}
|
|
while (qpdf_more_warnings(qpdf))
|
|
{
|
|
warnings = 1;
|
|
printf("warning: %s\n",
|
|
qpdf_get_error_full_text(qpdf, qpdf_next_warning(qpdf)));
|
|
}
|
|
if (qpdf_has_error(qpdf))
|
|
{
|
|
errors = 1;
|
|
printf("error: %s\n",
|
|
qpdf_get_error_full_text(qpdf, qpdf_get_error(qpdf)));
|
|
}
|
|
qpdf_cleanup(&qpdf);
|
|
if (errors)
|
|
{
|
|
return 2;
|
|
}
|
|
else if (warnings)
|
|
{
|
|
return 3;
|
|
}
|
|
|
|
return 0;
|
|
}
|