Add libexif to deps/third_party.

libexif/sources/test/test-parse.c

+/** \file test-parse.c
+ * \brief Completely parse all files given on the command line.
+ *
+ * Copyright (C) 2007 Hans Ulrich Niedermann <gp@n-dimensional.de>
+ *
+ * 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>
+
+
+/** Callback function handling an ExifEntry. */
+void content_foreach_func(ExifEntry *entry, void *callback_data);
+void content_foreach_func(ExifEntry *entry, void *UNUSED(callback_data))
+{
+  char buf[2000];
+  exif_entry_get_value(entry, buf, sizeof(buf));
+  printf("    Entry %p: %s (%s)\n"
+         "      Size, Comps: %d, %d\n"
+         "      Value: %s\n", 
+         entry,
+         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)));
+}
+
+
+/** Callback function handling an ExifContent (corresponds 1:1 to an IFD). */
+void data_foreach_func(ExifContent *content, void *callback_data);
+void data_foreach_func(ExifContent *content, void *callback_data)
+{
+  printf("  Content %p: ifd=%d\n", content, exif_content_get_ifd(content));
+  exif_content_foreach_entry(content, content_foreach_func, callback_data);
+}
+
+
+/** Run EXIF parsing test on the given file. */
+void test_parse(const char *filename, void *callback_data);
+void test_parse(const char *filename, void *callback_data)
+{
+  ExifData *d;
+  printf("File %s\n", filename);
+
+  d = exif_data_new_from_file(filename);
+  exif_data_foreach_content(d, data_foreach_func, callback_data);
+  exif_data_unref(d);
+}
+
+
+/** Callback function prototype for string parsing. */
+typedef void (*test_parse_func) (const char *filename, void *callback_data);
+
+
+/** Split string at whitespace and call callback with each substring. */
+void split_ws_string(const char *string, test_parse_func func, void *callback_data);
+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);
+          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;
+
+  const char *envar = getenv("TEST_IMAGES");
+  if (envar) {
+    split_ws_string(envar, test_parse, callback_data);
+  }
+
+  for (i=1; i<argc; i++) {
+    test_parse(argv[i], callback_data);
+  }
+
+  return 0;
+}