Config_ini

config_ini/Makefile

@@ -0,0 +1,14 @@
+CC = gcc
+CFLAGS = -Wall -O2
+
+TARGET = main.elf
+SRC = main.c conf.c
+
+#LDFLAGS =
+
+$(TARGET): $(SRC)
+	@echo CC $@
+	@$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+clean:
+	rm -f $(TARGET)

config_ini/conf.c

@@ -0,0 +1,80 @@
+#include "conf.h"
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_LINE 256
+#define MAX_VAL  128
+
+/* Trim leading/trailing whitespace */
+static char *trim(char *str) {
+    char *end;
+
+    while (isspace((unsigned char)*str)) str++;
+    if (*str == 0)
+        return str; // only spaces
+
+    end = str + strnlen(str, MAX_VAL) - 1;
+
+    while (end > str && isspace((unsigned char)*end)) end--;
+    end[1] = '\0';
+    return str;
+}
+
+/* Load INI-style config */
+Config *config_load(const char *filename) {
+    FILE *f = fopen(filename, "r");
+    if (!f)
+        return NULL;
+
+    Config *cfg = calloc(1, sizeof(Config));
+    char    line[MAX_LINE];
+
+    while (fgets(line, sizeof(line), f)) {
+        char *s = trim(line);
+
+        // Skip empty or comment lines
+        if (*s == '\0' || *s == '#' || *s == ';')
+            continue;
+
+        char *eq = strchr(s, '=');
+        if (!eq)
+            continue; // invalid line, skip
+
+        *eq = '\0';
+        char *key = trim(s);
+        char *val = trim(eq + 1);
+
+        ConfigEntry *entry = malloc(sizeof(ConfigEntry));
+        entry->key = strndup(key, MAX_VAL);
+        entry->value = strndup(val, MAX_VAL);
+        entry->next = cfg->head;
+        cfg->head = entry;
+    }
+
+    fclose(f);
+    return cfg;
+}
+
+/* Get value for a key */
+const char *config_get(Config *cfg, const char *key) {
+    for (ConfigEntry *e = cfg->head; e; e = e->next) {
+        if (strncmp(e->key, key, MAX_VAL) == 0)
+            return e->value;
+    }
+    return NULL;
+}
+
+/* Free the config struct */
+void config_free(Config *cfg) {
+    ConfigEntry *e = cfg->head;
+    while (e) {
+        ConfigEntry *next = e->next;
+        free(e->key);
+        free(e->value);
+        free(e);
+        e = next;
+    }
+    free(cfg);
+}

config_ini/conf.h

@@ -0,0 +1,13 @@
+typedef struct ConfigEntry {
+    char               *key;
+    char               *value;
+    struct ConfigEntry *next;
+} ConfigEntry;
+
+typedef struct {
+    ConfigEntry *head;
+} Config;
+
+Config     *config_load(const char *filename);
+const char *config_get(Config *cfg, const char *key);
+void        config_free(Config *cfg);

config_ini/config.ini

@@ -0,0 +1,6 @@
+# Example INI file
+username = testuser
+password = secret123
+
+; comments work too
+timeout = 30

config_ini/config_broken.ini

@@ -0,0 +1,7 @@
+# Example INI file
+username = testuser ; inline
+password = secret123 # Comment
+
+; comments work too
+[aa]
+timeout = 30

config_ini/main.c

@@ -0,0 +1,20 @@
+#include "conf.h"
+#include <stdio.h>
+
+// Example usage
+int main(void) {
+    Config *cfg = config_load("config.ini");
+    if (!cfg) {
+        fprintf(stderr, "Failed to load config.ini\n");
+        return 1;
+    }
+
+    const char *user = config_get(cfg, "username");
+    const char *pass = config_get(cfg, "password");
+
+    printf("Username: %s\n", user ? user : "(not set)");
+    printf("Password: %s\n", pass ? pass : "(not set)");
+
+    config_free(cfg);
+    return 0;
+}