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/** \file test-parse.c
* \brief Completely parse all files given on the command line.
*
* Copyright (C) 2007 Hans Ulrich Niedermann <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "libexif/exif-data.h"
#include "libexif/exif-system.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
static unsigned entry_count;
/** Callback function handling an ExifEntry. */
static void content_foreach_func(ExifEntry *entry, void *UNUSED(callback_data))
{
char buf[2000];
exif_entry_get_value(entry, buf, sizeof(buf));
printf(" Entry %u: %s (%s)\n"
" Size, Comps: %d, %d\n"
" Value: %s\n",
entry_count,
exif_tag_get_name(entry->tag),
exif_format_get_name(entry->format),
entry->size,
(int)(entry->components),
exif_entry_get_value(entry, buf, sizeof(buf)));
++entry_count;
}
/** Callback function handling an ExifContent (corresponds 1:1 to an IFD). */
static void data_foreach_func(ExifContent *content, void *callback_data)
{
static unsigned content_count;
entry_count = 0;
printf(" Content %u: ifd=%d\n", content_count, exif_content_get_ifd(content));
exif_content_foreach_entry(content, content_foreach_func, callback_data);
++content_count;
}
static void dump_makernote(ExifData *d) {
ExifMnoteData *mn = exif_data_get_mnote_data(d);
if (mn) {
char buf[2000];
int i;
int num = exif_mnote_data_count(mn);
printf(" MakerNote\n");
for (i=0; i < num; ++i) {
if (exif_mnote_data_get_value(mn, i, buf, sizeof(buf))) {
const char *name = exif_mnote_data_get_name(mn, i);
unsigned int id = exif_mnote_data_get_id(mn, i);
if (!name)
name = "(unknown)";
printf(" Entry %u: %u, %s\n"
" Size: %u\n"
" Value: %s\n", i, id, name, (unsigned)strlen(buf), buf);
}
}
}
}
/** Run EXIF parsing test on the given file. */
static void test_parse(const char *filename, void *callback_data, int swap)
{
ExifData *d;
/* Skip over path to display only the file name */
const char *fn = strrchr(filename, '/');
if (fn)
++fn;
else
fn = filename;
printf("File %s\n", fn);
d = exif_data_new_from_file(filename);
if (!d) {
fprintf (stderr, "Could not load data from '%s'!\n", filename);
return;
}
printf("Byte order: %s\n",
exif_byte_order_get_name(exif_data_get_byte_order(d)));
if (swap) {
ExifByteOrder order = EXIF_BYTE_ORDER_INTEL;
if (exif_data_get_byte_order(d) == order) {
order = EXIF_BYTE_ORDER_MOTOROLA;
}
/* This switches the byte order of the entire EXIF data structure,
* including the MakerNote */
exif_data_set_byte_order(d, order);
printf("New byte order: %s\n",
exif_byte_order_get_name(exif_data_get_byte_order(d)));
}
exif_data_foreach_content(d, data_foreach_func, callback_data);
dump_makernote(d);
exif_data_unref(d);
}
/** Callback function prototype for string parsing. */
typedef void (*test_parse_func) (const char *filename, void *callback_data, int swap);
/** Split string at whitespace and call callback with each substring. */
static void split_ws_string(const char *string, test_parse_func func, void *callback_data)
{
const char *start = string;
const char *p = start;
for (;;) {
if (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == '\0' ) {
size_t len = p-start;
if (len > 0) {
/* emulate strndup */
char *str = malloc(1+len);
if (str) {
memcpy(str, start, len);
str[len] = '\0';
func(str, callback_data, 0);
free(str);
start = p+1;
}
} else {
start = p+1;
}
}
if (*p == '\0') {
break;
}
p++;
}
}
/** Main program. */
int main(const int argc, const char *argv[])
{
int i;
void *callback_data = NULL;
int swap = 0;
int first = 1;
if (argc > 1 && !strcmp(argv[1], "--swap-byte-order")) {
swap = 1;
++first;
}
if (argc > first) {
for (i=first; i<argc; i++) {
test_parse(argv[i], callback_data, swap);
}
} else {
/* If no command-line argument is found, get the file names from
the environment. */
const char *envar = getenv("TEST_IMAGES");
if (envar) {
split_ws_string(envar, test_parse, callback_data);
}
}
return 0;
}
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