feat(hmpl): render simple placeholder with memory leak of course

package/c/chectic/chectic.c

@@ -0,0 +1,98 @@
+#include "chectic.h"
+
+void set_output_color_mode(ColorMode mode) {
+    color_mode = mode;
+}
+
+// ------------
+// -- Logger --
+// ------------
+
+const char* log_level_to_string(LogLevel level) {
+    switch (level) {
+        case LOG_LEVEL_DEBUG: return "DEBUG";
+        case LOG_LEVEL_LOG:  return "LOG";
+        case LOG_LEVEL_INFO:  return "INFO";
+        case LOG_LEVEL_NOTICE:  return "NOTICE";
+        case LOG_LEVEL_WARN:  return "WARN";
+        case LOG_LEVEL_EXCEPTION: return "EXCEPTION";
+        default:              return "UNKNOWN";
+    }
+}
+
+LogLevel log_level_from_string(const char *level_str) {
+    if (!level_str) return LOG_LEVEL_INFO;
+    if (strcmp(level_str, "DEBUG") == 0)
+        return LOG_LEVEL_DEBUG;
+    else if (strcmp(level_str, "LOG") == 0)
+        return LOG_LEVEL_LOG;
+    else if (strcmp(level_str, "INFO") == 0)
+        return LOG_LEVEL_INFO;
+    else if (strcmp(level_str, "NOTICE") == 0)
+        return LOG_LEVEL_NOTICE;
+    else if (strcmp(level_str, "WARN") == 0)
+        return LOG_LEVEL_WARN;
+    else if (strcmp(level_str, "EXCEPTION") == 0)
+        return LOG_LEVEL_EXCEPTION;
+    else
+        return LOG_LEVEL_INFO;
+}
+
+LogLevel current_log_level = LOG_LEVEL_INFO;
+
+void logger_level_reset() {
+    current_log_level = LOG_LEVEL_INFO;
+}
+
+void logger_level(LogLevel level) {
+    current_log_level = level;
+}
+
+void init_logger(void) {
+    current_log_level = log_level_from_string(getenv("LOG_LEVEL"));
+}
+
+char* log_message(LogLevel level, char *file, int line, const char *format, ...) {
+    if (level < current_log_level) {
+        return NULL;
+    }
+
+    time_t now = time(NULL);
+    struct tm tm_info;
+    localtime_r(&now, &tm_info);
+    static char timeStr[20];
+    strftime(timeStr, sizeof(timeStr), "%Y-%m-%d %H:%M:%S", &tm_info);
+
+    fprintf(stderr, "%s %s %s:%d ", timeStr, log_level_to_string(level), file, line);
+
+    va_list args;
+    va_start(args, format);
+    vfprintf(stderr, format, args);
+    va_end(args);
+
+    fprintf(stderr, "\n");
+
+    return timeStr;
+}
+
+// -----------
+// -- arena --
+// -----------
+
+Arena arena_init(size_t size) {
+  Arena arena;
+  arena.begin = malloc(size);
+  memset(arena.begin, 0, size);
+  arena.current = arena.begin;
+  arena.capacity = size;
+
+  return arena;
+}
+
+void arena_reset(Arena *arena) {
+  arena->current = arena->begin;
+}
+
+void arena_free(Arena *arena) {
+  free(arena->begin);
+}