Added two new fuctions to dict API

pdfio-dict.c

@@ -524,6 +524,36 @@ pdfioDictIterateKeys(
   }
 }
 
+//
+// 'pdfioDictGetNumKeys()' - Get the number of keys on the selected dictionary
+//
+
+size_t									// O - Number of keys
+pdfioDictGetNumKeys(pdfio_dict_t  *dict) // I - Dictionary
+{
+	return (dict->num_pairs);
+}
+
+//
+// 'pdfioDictGetKeyByIndex()' - Get name and type of a key by index from a dictionary
+//
+// Alternative form to enumerate the keys of a dictionary
+
+bool								// O - Value
+pdfioDictGetKeyByIndex(pdfio_dict_t  *dict, // I - Dictionary
+						size_t index,		// I - Index
+						pdfio_dictKey_t *key) // I - struct pointer
+{
+if (index < dict->num_pairs)
+ {
+ 	if (key){
+ 		key->key = dict->pairs[index].key;
+ 		key->type = (pdfio_valtype_t **)(dict->pairs[index].value.type);
+ 		return (true);
+ 	}
+ }
+ return (false);
+}
 
 //
 // '_pdfioDictRead()' - Read a dictionary from a PDF file.

pdfio.h

@@ -123,6 +123,12 @@ typedef enum pdfio_valtype_e		// PDF value types
   PDFIO_VALTYPE_NUMBER,			// Number (integer or real)
   PDFIO_VALTYPE_STRING			// String
 } pdfio_valtype_t;
+				// Alternative PDF dict key enumeration
+typedef struct pdfio_dictKey_s
+{
+  const char *key;
+  pdfio_valtype_t **type;
+} pdfio_dictKey_t;
 
 
 //
@@ -165,6 +171,8 @@ extern pdfio_obj_t	*pdfioDictGetObj(pdfio_dict_t *dict, const char *key) _PDFIO_
 extern pdfio_rect_t	*pdfioDictGetRect(pdfio_dict_t *dict, const char *key, pdfio_rect_t *rect) _PDFIO_PUBLIC;
 extern const char	*pdfioDictGetString(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
 extern pdfio_valtype_t	pdfioDictGetType(pdfio_dict_t *dict, const char *key) _PDFIO_PUBLIC;
+extern size_t pdfioDictGetNumKeys(pdfio_dict_t *dict) _PDFIO_PUBLIC;
+extern bool pdfioDictGetKeyByIndex(pdfio_dict_t *dict, size_t index, pdfio_dictKey_t *keyData) _PDFIO_PUBLIC;
 extern void		pdfioDictIterateKeys(pdfio_dict_t *dict, pdfio_dict_cb_t cb, void *cb_data) _PDFIO_PUBLIC;
 extern bool		pdfioDictSetArray(pdfio_dict_t *dict, const char *key, pdfio_array_t *value) _PDFIO_PUBLIC;
 extern bool		pdfioDictSetBinary(pdfio_dict_t *dict, const char *key, const unsigned char *value, size_t valuelen) _PDFIO_PUBLIC;

test_mod.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "pdfio.h"
+
+/*
+*	Usage: ./test_mod [file.pdf]
+*
+* Compiled as:
+* gcc test_mod.c -L. -lpdfio -lm -lz -o test_mod
+*
+*/
+
+
+int main (int argc, char **argv)
+{
+	pdfio_file_t *pdf = pdfioFileOpen(argv[1], NULL, NULL, NULL, NULL);
+	pdfio_obj_t *obj_page = pdfioFileGetPage(pdf, 0);
+	pdfio_dict_t *dict_page = pdfioObjGetDict(obj_page);
+
+	size_t num_keys = pdfioDictGetNumKeys(dict_page);
+	printf("Number of keys in this page: %d\n", num_keys);
+
+	for (unsigned int i = 0; i < num_keys; ++i)
+	{
+		pdfio_dictKey_t dict_key;
+		pdfioDictGetKeyByIndex(dict_page, i, &dict_key);
+		printf("\t%s (%d)\n", dict_key.key, dict_key.type);
+	}
+
+	pdfioFileClose(pdf);
+
+	return 0;
+}