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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <err.h>
static const char *stdin_name = "/dev/stdin";
static FILE*
fopen_or_die(const char *path, const char *mode)
{
assert(path && mode);
FILE *f;
if (!(f = fopen(path, mode)))
err(EXIT_FAILURE, "fopen(%s, %s)", path, mode);
return f;
}
static void
detect(const char *path)
{
assert(path);
uint8_t buf[32] = {0};
const char *name = (!strcmp(path, "-") ? stdin_name : path);
FILE *f = (name == stdin_name ? stdin : fopen_or_die(name, "rb"));
fread(buf, 1, sizeof(buf), f);
const struct info {
const char *name;
const uint8_t *header;
size_t chunk;
} map[] = {
#define HDR(...) .header = (const uint8_t[]){__VA_ARGS__}, .chunk = sizeof((const uint8_t[]){__VA_ARGS__})
{
.name = "BGMStream",
HDR('B', 'G', 'M', 'S', 't', 'r', 'e', 'a', 'm')
}, {
.name = "SeWave",
HDR('S', 'e', 'W', 'a', 'v', 'e')
}, {
.name = "PMUS",
HDR('P', 'M', 'U', 'S')
}, {
.name = "RIFF/WAVE",
HDR('R', 'I', 'F', 'F', 0x24, 0xB3, 0xCF, 0x04, 'W', 'A', 'V', 'E', 'f', 'm', 't')
}, {
.name = "RIFF/ACON",
HDR('R', 'I', 'F', 'F', 0x58, 0x23, 0, 0, 'A', 'C', 'O', 'N', 'a', 'n', 'i', 'h')
}, {
.name = "name",
HDR('n', 'o', 'n', 'e', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
}, {
.name = "syst",
HDR('s', 'y', 's', 't')
}, {
.name = "menu",
HDR('m', 'e', 'n', 'u')
}, {
.name = "lobb",
HDR('l', 'o', 'b', 'b')
}, {
.name = "wave",
HDR('w', 'a', 'v', 'e')
}, {
.name = "ability",
HDR(0, 0, 0, 0x17, 0, 0, 0, 0, 0x80)
}, {
.name = "spell",
HDR(0, 0, 0, 0, 0x03, 0, 0x9F, 0, 0x10)
}, {
.name = "mgc_",
HDR('m', 'g', 'c', '_')
}, {
.name = "win0",
HDR('w', 'i', 'n', '0')
}, {
.name = "titl",
HDR('t', 'i', 't', 'l')
}, {
.name = "sel_",
HDR('s', 'e', 'l', '_')
}, {
.name = "damv",
HDR('d', 'a', 'm', 'v')
}, {
.name = "XISTRING",
HDR('X', 'I', 'S', 'T', 'R', 'I', 'N', 'G')
}, {
.name = "prvd",
HDR('p', 'r', 'v', 'd')
}, {
.name = "selp",
HDR('s', 'e', 'l', 'p')
}, {
.name = "dun",
HDR('d', 'u', 'n')
}, {
.name = "town",
HDR('t', 'o', 'w', 'n')
}, {
.name = "dese",
HDR('d', 'e', 's', 'e')
}, {
.name = "fore",
HDR('f', 'o', 'r', 'e')
}, {
.name = "tree",
HDR('t', 'r', 'e', 'e')
}, {
.name = "unka",
HDR('u', 'n', 'k', 'a')
}, {
.name = "moun",
HDR('m', 'o', 'u', 'n')
}, {
.name = "cast",
HDR('c', 'a', 's', 't')
}, {
.name = "fuji",
HDR('f', 'u', 'j', 'i')
}, {
.name = "view",
HDR('v', 'i', 'e', 'w')
}
#undef HDR
};
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
const struct info *info = NULL;
for (size_t i = 0; i < ARRAY_SIZE(map); ++i) {
assert(map[i].chunk <= sizeof(buf));
if (memcmp(buf, map[i].header, map[i].chunk))
continue;
info = &map[i];
break;
}
if (info) {
printf("%s: %s\n", name, info->name);
} else {
int i;
for (i = 0; i < 32 && isprint(buf[i]); ++i);
if (i > 0) {
printf("%s: unknown (%.*s)\n", name, i, buf);
} else {
printf("%s: unknown\n", name);
}
}
fclose(f);
}
int
main(int argc, char *argv[])
{
if (argc < 2)
errx(EXIT_FAILURE, "usage: %s file ...", argv[0]);
for (int i = 1; i < argc; ++i)
detect(argv[i]);
return EXIT_SUCCESS;
}
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