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#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 = fopen(filename, "rb");
if (!f) {
if (Options.strict) {
fprintf(stderr, "Could not open file: '%s'\n", filename);
exit(1);
} else {
return;
}
}
fseek(f, 0, SEEK_END);
long size = ftell(f);
rewind(f);
char *buffer = malloc(size + 1);
char *orig = buffer;
size = fread(buffer, 1, size, f);
buffer[size] = '\0';
fclose(f);
for (; buffer && (buffer - orig < size); buffer++) {
bool is_include = false;
bool is_incbin = false;
switch (*buffer) {
case ';':
buffer = strchr(buffer, '\n');
if (!buffer) {
fprintf(stderr, "%s: no newline at end of file\n", filename);
break;
}
break;
case '"':
buffer++;
buffer = strchr(buffer, '"');
if (!buffer) {
fprintf(stderr, "%s: unterminated string\n", filename);
break;
}
buffer++;
break;
case 'i':
case 'I':
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, '"');
if (!buffer) {
break;
}
buffer++;
int length = strcspn(buffer, "\"");
char *include = malloc(length + 1);
strncpy(include, buffer, length);
include[length] = '\0';
if (strstr(include, "\\1")) {
break;
}
printf("%s ", include);
if (is_include) {
scan_file(include);
}
free(include);
buffer = strchr(buffer, '"');
}
break;
}
if (!buffer) {
break;
}
}
free(orig);
}
int main(int argc, char* argv[]) {
int i = 0;
struct option long_options[] = {
{"strict", no_argument, 0, 's'},
{"help", no_argument, 0, 'h'},
{0}
};
int opt = -1;
while ((opt = getopt_long(argc, argv, "sh", long_options, &i)) != -1) {
switch (opt) {
case 's':
Options.strict = true;
break;
case 'h':
Options.help = true;
break;
default:
usage();
exit(1);
break;
}
}
argc -= optind;
argv += optind;
if (Options.help) {
usage();
return 0;
}
if (argc < 1) {
usage();
exit(1);
}
scan_file(argv[0]);
return 0;
}
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