Add example showing how to write INI files

refs #143

example/Makefile

@@ -12,11 +12,14 @@ RM      ?= rm -f
 
 default: all
 
-all: iniexample parse
+all: iniexample iniwrite parse
 
 iniexample: iniexample.c
 	$(CC) $(CFLAGS) -o iniexample iniexample.c -I../src -L.. -liniparser
 
+iniwrite: iniwrite.c
+	$(CC) $(CFLAGS) -o iniwrite iniwrite.c -I../src -L.. -liniparser
+
 parse: parse.c
 	$(CC) $(CFLAGS) -o parse parse.c -I../src -L.. -liniparser
 

example/iniwrite.c

@@ -0,0 +1,77 @@
+#include "iniparser.h"
+
+void create_empty_ini_file(void)
+{
+    FILE *ini;
+
+    if ((ini = fopen("example.ini", "w")) == NULL) {
+        fprintf(stderr, "iniparser: cannot create example.ini\n");
+        return;
+    }
+
+    fclose(ini);
+}
+
+int write_to_ini(const char *ini_name)
+{
+    void *dictionary;
+    FILE *ini_file;
+    int ret = 0;
+
+    if (!ini_name || !dictionary) {
+        fprintf(stderr, "Invalid argurment\n");
+        return -1;
+    }
+
+    dictionary = iniparser_load(ini_name);
+
+    if (!dictionary) {
+        fprintf(stderr, "cannot parse file: %s\n", ini_name);
+        return -1;
+    }
+
+    /* set section */
+    ret = iniparser_set(dictionary, "Pizza", NULL);
+
+    if (ret < 0) {
+        fprintf(stderr, "cannot set section in: %s\n", ini_name);
+        ret = -1;
+        goto free_dict;
+    }
+
+    /* set key/value pair */
+    ret = iniparser_set(dictionary, "Pizza:Cheese", "TRUE");
+
+    if (ret < 0) {
+        fprintf(stderr, "cannot set key/value in: %s\n", ini_name);
+        ret = -1;
+        goto free_dict;
+    }
+
+    ini_file = fopen(ini_name, "w+");
+
+    if (!ini_file) {
+        fprintf(stderr, "iniparser: cannot create example.ini\n");
+        ret = -1;
+        goto free_dict;
+    }
+
+    iniparser_dump_ini(dictionary, ini_file);
+    fclose(ini_file);
+free_dict:
+    iniparser_freedict(dictionary);
+    return ret;
+}
+
+int main(int argc, char *argv[])
+{
+    int ret;
+
+    if (argc < 2) {
+        create_empty_ini_file();
+        ret = write_to_ini("example.ini");
+    } else
+        ret = write_to_ini(argv[1]);
+
+    return ret ;
+}