Add C build tools.

tools/scan_includes.c

@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void usage(void) {
+	printf("Usage: scan_includes filename\n");
+	exit(1);
+}
+
+void scan_file(char* filename) {
+	FILE* f;
+	long size;
+	char* orig;
+	char* buffer;
+	char* include;
+	int length;
+
+	f = fopen(filename, "r");
+	if (f == NULL) {
+		fprintf(stderr, "Could not open file: '%s'\n", filename);
+		exit(1);
+	}
+
+	fseek(f, 0, SEEK_END);
+	size = ftell(f);
+	rewind(f);
+
+	//fprintf(stderr, "malloc: %s\n", filename);
+	buffer = malloc(size + 1);
+	orig = buffer;
+	fread(buffer, 1, size, f);
+	buffer[size] = '\0';
+	fclose(f);
+	//fprintf(stderr, "read: %s\n", filename);
+
+	for (; (buffer != NULL) && (buffer != 0) && (buffer - orig < size); buffer++) {
+		//fprintf(stderr, "%c", buffer[0]);
+		if (buffer[0] == ';') {
+			buffer = strchr(buffer, '\n');
+			if (buffer == NULL) {
+				fprintf(stderr, "%s: no newline at end of file\n", filename);
+				break;
+			}
+			continue;
+		}
+		if (
+			(strncmp(buffer, "INCBIN", 6) == 0) ||
+			(strncmp(buffer, "incbin", 6) == 0)
+		) {
+			buffer = strchr(buffer, '"') + 1;
+			if (buffer == NULL) break;
+			length = strcspn(buffer, "\"");
+			include = malloc(length + 1);
+			strncpy(include, buffer, length);
+			include[length] = '\0';
+			printf("%s ", include);
+			free(include);
+		} else if (
+			(strncmp(buffer, "INCLUDE", 7) == 0) ||
+			(strncmp(buffer, "include", 7) == 0)
+		) {
+			buffer = strchr(buffer, '"') + 1;
+			if (buffer == NULL) break;
+			length = strcspn(buffer, "\"");
+			include = malloc(length + 1);
+			strncpy(include, buffer, length);
+			include[length] = '\0';
+			printf("%s ", include);
+			scan_file(include);
+			free(include);
+		}
+	}
+
+	//fprintf(stderr, "free: %s\n", filename);
+	free(orig);
+	//fprintf(stderr, "freed: %s\n", filename);
+}
+
+int main(int argc, char* argv[]) {
+	if (argc < 2) {
+		usage();
+	}
+	scan_file(argv[1]);
+	return 0;
+}