Example and new helper funcion

* Added an example program an ini file to example/
* Added a new helper function `parcini_value_handle` to handle and copy
  parsed values, depending on the expected value type.

2 files changed, 107 insertions, 0 deletions

diff --git a/example/example.c b/example/example.c
new file mode 100644
index 0000000..1036845
--- /dev/null
+++ b/example/example.c
@@ -0,0 +1,99 @@
+#define _POSIX_C_SOURCE 200809L
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "parcini.h"
+
+#define EXAMPLE_INI "example/example.ini"
+
+struct {
+	struct {
+		char *name;
+		long int age;
+	} personal;
+	struct {
+		char *email;
+		bool visible;
+	} contact;
+} example = {
+	.personal.name = NULL,
+	.contact.email = NULL,
+};
+
+static bool
+handle_keyvalue(struct parcini_line *parsed)
+{
+#define MATCHES(s, k) !strcmp(parsed->section, s) && !strcmp(parsed->key, k)
+
+	if (MATCHES("personal", "name")) {
+		return parcini_value_handle(&parsed->value, PARCINI_VALUE_STRING,
+				&example.personal.name);
+	}
+	if (MATCHES("personal", "age")) {
+		return parcini_value_handle(&parsed->value, PARCINI_VALUE_INTEGER,
+				&example.personal.age);
+	}
+	if (MATCHES("contact", "email")) {
+		return parcini_value_handle(&parsed->value, PARCINI_VALUE_STRING,
+				&example.contact.email);
+	}
+	if (MATCHES("contact", "visible")) {
+		return parcini_value_handle(&parsed->value, PARCINI_VALUE_BOOLEAN, 
+				&example.contact.visible);
+	}
+
+	return false;
+}
+
+int
+main(void)
+{
+	parcini_t *parser = parcini_from_file(EXAMPLE_INI);
+	if (parser == NULL) {
+		fprintf(stderr, "error opening file: %s\n", strerror(errno));
+		return 1;
+	}
+
+	struct parcini_line parsed;
+	enum parcini_result res;
+	while ((res = parcini_parse_next_line(parser, &parsed)) != PARCINI_EOF) {
+		switch (res) {
+		case PARCINI_EMPTY_LINE:
+		case PARCINI_SECTION:
+			continue;
+
+		case PARCINI_KEYVALUE:
+			if (!handle_keyvalue(&parsed)) {
+				fprintf(stderr, 
+						"line %ld: error: unexpected section '%s'/key '%s' or "
+						"invalid value type\n",
+						parsed.lineno, parsed.section, parsed.key);
+				goto cleanup;
+			}
+			continue;
+
+		case PARCINI_MEMORY_ERROR:
+		case PARCINI_STREAM_ERROR:
+			fprintf(stderr, 
+					"An error occurred while trying to read the next line\n");
+			goto cleanup;
+
+		default:
+			fprintf(stderr, "line %ld: parse error\n", parsed.lineno);
+			goto cleanup;
+		};
+	}
+
+	printf("parsed example.ini:\n");
+	printf("name:\t%s\n", example.personal.name);
+	printf("age:\t%ld\n", example.personal.age);
+	printf("email:\t%s\n", example.contact.email);
+	printf("visible:\t%s\n", example.contact.visible ? "true" : "false");
+
+cleanup:
+	free(example.personal.name);
+	free(example.contact.email);
+	parcini_destroy(parser);
+}
diff --git a/example/example.ini b/example/example.ini
new file mode 100644
index 0000000..9dd5a0e
--- /dev/null
+++ b/example/example.ini
@@ -0,0 +1,8 @@
+# An example ini file
+[personal]
+name = "Ivan Ivanovich Ivanov"
+age = 69
+
+[contact]
+email = "ivan@mail.xyz"
+visible = yes