Initial commit

lib/rtlf.cpp

@@ -0,0 +1,48 @@
+#include "rtlf.h"
+
+#include "cassert"
+
+static int write_header_block(FILE* file, __uint32_t car_id, const char* track_name) {
+    RTLF_Header_Fixed header;
+    const size_t track_len = strlen(track_name);
+
+    memcpy(header.magic_number, RTLF_MAGIC_NUMBER, 4);
+    header.version = RTLF_VERSION;
+    header.car_id = car_id;
+    header.track_name_len = static_cast<__uint32_t>(track_len);
+
+    assert(fwrite(&header, sizeof(RTLF_Header_Fixed), 1, file) == 1);
+    assert(fwrite(track_name, 1, track_len, file) == track_len);
+
+    return 0;
+}
+
+RTLF_Context* rtlf_open_write(const char* filename, __uint32_t car_id, const char* track_name) {
+    FILE* file = fopen(filename, "wb");
+
+    assert(file != nullptr);
+
+    write_header_block(file, car_id, track_name);
+    auto* ctx = static_cast<RTLF_Context *>(malloc(sizeof(RTLF_Context)));
+    if (!ctx) {
+        fclose(file);
+        return nullptr;
+    }
+
+    ctx->file = file;
+    ctx->track_name = strdup(track_name);
+    return ctx;
+}
+
+int rtlf_write_record(RTLF_Context* ctx, const RTLF_Data_Record* record) {
+    if (!ctx || !ctx->file) return -1;
+    if (fwrite(record, RTLF_RECORD_SIZE, 1, ctx->file) != 1) return -1;
+    return 0;
+}
+
+void rtlf_close(RTLF_Context* ctx) {
+    if (!ctx) return;
+    if (ctx->file) fclose(ctx->file);
+    if (ctx->track_name) free(ctx->track_name);
+    free(ctx);
+}