Initial commit.

src/main.c

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2025 Nicolás Ortega Froysa <nicolas@ortegas.org> All rights reserved.
+ * Author: Nicolás Ortega Froysa <nicolas@ortegas.org>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ *    distribution.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+	const char *in_file_path = argv[1], *out_file_path = argv[2];
+	FILE *in_file = NULL, *out_file = NULL;
+	int ret = EXIT_SUCCESS;
+	int tab_num = 0;
+	char ch, last_ch = 0;
+
+	if(argc != 3) {
+		printf("Usage: %s <in-file> <out-file>\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	in_file = fopen(in_file_path, "r");
+	if(!in_file) {
+		fprintf(stderr, "Failed to open file '%s'.", in_file_path);
+		ret = EXIT_FAILURE;
+		goto exit_err;
+	}
+	out_file = fopen(out_file_path, "w");
+	if(!out_file) {
+		fprintf(stderr, "Failed to open file '%s'.", out_file_path);
+		ret = EXIT_FAILURE;
+		goto exit_err;
+	}
+
+	ch = fgetc(in_file);
+
+	while(ch != EOF) {
+		switch(ch) {
+		case '[':
+		case '{':
+			tab_num++;
+			fprintf(out_file, "%c\n", ch);
+			for(int i = 0; i < tab_num; ++i)
+				fprintf(out_file, "  ");
+			last_ch = ' ';
+			break;
+		case ']':
+		case '}':
+			tab_num--;
+			fputc('\n', out_file);
+			for(int i = 0; i < tab_num; ++i)
+				fprintf(out_file, "  ");
+			fputc(ch, out_file);
+			break;
+		case ',':
+			fprintf(out_file, "%c\n", ch);
+			for(int i = 0; i < tab_num; ++i)
+				fprintf(out_file, "  ");
+			last_ch = ' ';
+			break;
+		default:
+			if(ch != ' ' || last_ch != ' ') {
+				fputc(ch, out_file);
+				last_ch = ch;
+			}
+			break;
+		}
+
+		ch = fgetc(in_file);
+	}
+
+exit_err:
+	if(in_file)
+		fclose(in_file);
+	if(out_file)
+		fclose(out_file);
+
+	return ret;
+}