1 files changed, 130 insertions, 0 deletions
diff --git a/tools/scan_includes.c b/tools/scan_includes.c
new file mode 100644
index 0000000..b6fcca0
--- /dev/null
+++ b/tools/scan_includes.c
@@ -0,0 +1,130 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <getopt.h>
+
+void usage(void) {
+	printf("Usage: scan_includes [-h] [-s] filename\n"
+	       "-h, --help\n"
+	       "    Print usage and exit\n"
+	       "-s, --strict\n"
+	       "    Fail if a file cannot be read\n");
+}
+
+struct Options {
+	bool help;
+	bool strict;
+};
+
+struct Options Options = {0};
+
+
+void scan_file(char* filename) {
+	FILE* f;
+	long size;
+	char* orig;
+	char* buffer;
+	char* include;
+	int length;
+
+	f = fopen(filename, "r");
+	if (!f) {
+		if (Options.strict) {
+			fprintf(stderr, "Could not open file: '%s'\n", filename);
+			exit(1);
+		} else {
+			return;
+		}
+	}
+
+	fseek(f, 0, SEEK_END);
+	size = ftell(f);
+	rewind(f);
+
+	buffer = malloc(size + 1);
+	orig = buffer;
+	fread(buffer, 1, size, f);
+	buffer[size] = '\0';
+	fclose(f);
+
+	for (; buffer && (buffer - orig < size); buffer++) {
+		if (buffer[0] == ';') {
+			buffer = strchr(buffer, '\n');
+			if (!buffer) {
+				fprintf(stderr, "%s: no newline at end of file\n", filename);
+				break;
+			}
+			continue;
+		}
+		bool is_include = false;
+		bool is_incbin = false;
+		if ((strncmp(buffer, "INCBIN", 6) == 0) || (strncmp(buffer, "incbin", 6) == 0)) {
+			is_incbin = true;
+		} else if ((strncmp(buffer, "INCLUDE", 7) == 0) || (strncmp(buffer, "include", 7) == 0)) {
+			is_include = true;
+		}
+		if (is_incbin || is_include) {
+			buffer = strchr(buffer, '"') + 1;
+			if (!buffer) {
+				break;
+			}
+			length = strcspn(buffer, "\"");
+			include = malloc(length + 1);
+			strncpy(include, buffer, length);
+			include[length] = '\0';
+			printf("%s ", include);
+			if (is_include) {
+				scan_file(include);
+			}
+			free(include);
+		}
+	}
+
+	free(orig);
+}
+
+void get_args(int argc, char *argv[]) {
+	while (1) {
+		struct option long_options[] = {
+			{"strict", no_argument, 0, 's'},
+			{"help", no_argument, 0, 'h'},
+			{0}
+		};
+		int i = 0;
+		int opt = getopt_long(argc, argv, "sh", long_options, &i);
+
+		if (opt == -1) {
+			break;
+		}
+
+		switch (opt) {
+		case 's':
+			Options.strict = true;
+			break;
+		case 'h':
+			Options.help = true;
+			break;
+		default:
+			usage();
+			exit(1);
+			break;
+		}
+	}
+}
+
+int main(int argc, char* argv[]) {
+	get_args(argc, argv);
+	argc -= optind;
+	argv += optind;
+	if (Options.help) {
+		usage();
+		return 0;
+	}
+	if (argc < 1) {
+		usage();
+		exit(1);
+	}
+	scan_file(argv[0]);
+	return 0;
+}