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Update lzcomp to the latest version and fix Makefiles accordingly

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This commit is contained in:
aaaaaa123456789 2018-08-04 23:43:59 -03:00
parent 98e670f363
commit 5a55d629e1
3 changed files with 130 additions and 19 deletions
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2
Makefile
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@ -96,7 +96,7 @@ pokecrystal11.gbc: $(crystal11_obj) pokecrystal.link
$(eval filename := $@.$(hash))
$(if $(wildcard $(filename)),\
cp $(filename) $@,\
tools/lzcomp $< $@)
tools/lzcomp -- $< $@)
### Terrible hacks to match animations. Delete these rules if you don't care about matching.

5
tools/Makefile
View File

@ -19,5 +19,10 @@ clean:
rm -f $(tools)
gfx md5: common.h
# suppress warnings
lzcomp: lzcomp.c
$(CC) -O3 -o $@ $<
%: %.c
$(CC) $(CFLAGS) -o $@ $<

142
tools/lzcomp.c
View File

@ -11,13 +11,24 @@ struct command {
signed value: 17;
};
struct options {
const char * input;
const char * output;
unsigned char mode;
};
int main(int, char **);
struct options get_options(int, char **);
void usage(const char *);
void error_exit(int, const char *, ...);
void bit_flip(const unsigned char *, unsigned short, unsigned char *);
unsigned char * read_file_into_buffer(const char *, unsigned short *);
void write_commands_to_textfile(const char *, const struct command *, unsigned, const unsigned char *);
void write_command_to_textfile(FILE *, struct command, const unsigned char *);
void write_commands_to_file(const char *, const struct command *, unsigned, const unsigned char *);
void write_command_to_file(FILE *, struct command, const unsigned char *);
struct command * compress(const unsigned char *, unsigned short *);
struct command * store_uncompressed(unsigned short *);
struct command * try_compress(const unsigned char *, const unsigned char *, unsigned short *, unsigned);
struct command find_best_copy(const unsigned char *, unsigned short, unsigned short, const unsigned char *, unsigned);
unsigned short scan_forwards(const unsigned char *, unsigned short, const unsigned char *, unsigned short, short *);
@ -33,19 +44,49 @@ struct command * merge_command_sequences(const struct command *, unsigned short,
unsigned short compressed_length(const struct command *, unsigned short);
int main (int argc, char ** argv) {
if (argc < 3) {
fprintf(stderr, "usage: %s <source file> <compressed output>\n", *argv);
return 3;
}
struct options options = get_options(argc, argv);
unsigned short size;
unsigned char * file_buffer = read_file_into_buffer(argv[1], &size);
unsigned char * file_buffer = read_file_into_buffer(options.input, &size);
struct command * compressed = compress(file_buffer, &size);
write_commands_to_file(argv[2], compressed, size, file_buffer);
if (options.mode)
write_commands_to_textfile(options.output, compressed, size, file_buffer);
else
write_commands_to_file(options.output, compressed, size, file_buffer);
free(file_buffer);
free(compressed);
return 0;
}
struct options get_options (int argc, char ** argv) {
struct options result = {.input = NULL, .output = NULL, .mode = 0};
const char * program_name = *argv;
for (argv ++; *argv; argv ++) {
if (strncmp(*argv, "--", 2)) break;
if (!strcmp(*argv, "--")) {
argv ++;
break;
} else if (!strcmp(*argv, "--text"))
result.mode = 1;
else if (!strcmp(*argv, "--binary"))
result.mode = 0;
else
error_exit(3, "unknown option: %s", *argv);
}
if (!*argv) usage(program_name);
result.input = *argv;
result.output = argv[1];
return result;
}
void usage (const char * program_name) {
fprintf(stderr, "Usage: %s [<options>] <source file> [<compressed output>]\n\n", program_name);
fputs("Options:\n", stderr);
fputs(" --text Output the command stream as text.\n", stderr);
fputs(" --binary Output the command stream as binary data (default).\n", stderr);
fputs(" -- End of option list.\n", stderr);
exit(3);
}
void error_exit (int error_code, const char * error, ...) {
va_list ap;
va_start(ap, error);
@ -77,13 +118,63 @@ unsigned char * read_file_into_buffer (const char * file, unsigned short * size)
return buf;
}
void write_commands_to_textfile (const char * file, const struct command * commands, unsigned count, const unsigned char * input_stream) {
FILE * fp = file ? fopen(file, "w") : stdout;
if (!fp) error_exit(1, "could not open file %s for writing", file);
while (count --) write_command_to_textfile(fp, *(commands ++), input_stream);
if (fputs("\tlzend\n", fp) < 0) error_exit(1, "could not write terminator to compressed output");
if (file) fclose(fp);
}
void write_command_to_textfile (FILE * fp, struct command command, const unsigned char * input_stream) {
if ((!command.count) || (command.count > 1024)) error_exit(2, "invalid command in output stream");
int rv, pos;
const char * kind;
switch (command.command) {
case 0:
if ((rv = fprintf(fp, "\tlzdata")) < 0) break;
for (pos = 0; pos < command.count; pos ++) if ((rv = fprintf(fp, "%s$%02hhx", pos ? ", " : " ", input_stream[command.value + pos])) < 0) break;
rv = putc('\n', fp);
break;
case 1:
if ((command.value < 0) || (command.value > 255)) error_exit(2, "invalid command in output stream");
rv = fprintf(fp, "\tlzrepeat %u, $%02hhx\n", command.count, (unsigned char) command.value);
break;
case 2:
if ((command.value < 0) || (command.value > 65535)) error_exit(2, "invalid command in output stream");
rv = fprintf(fp, "\tlzrepeat %u, $%02hhx, $%02hhx\n", command.count, (unsigned char) command.value, (unsigned char) (command.value >> 8));
break;
case 3:
rv = fprintf(fp, "\tlzzero %u\n", command.count);
break;
case 4:
kind = "normal";
goto copy;
case 5:
kind = "flipped";
goto copy;
case 6:
kind = "reversed";
copy:
if ((command.value < -128) || (command.value > 32767)) error_exit(2, "invalid command in output stream");
if (command.value < 0)
rv = fprintf(fp, "\tlzcopy %s, %u, %d\n", kind, command.count, command.value);
else
rv = fprintf(fp, "\tlzcopy %s, %u, $%04hx\n", kind, command.count, (unsigned short) command.value);
break;
default:
error_exit(2, "invalid command in output stream");
}
if (rv < 0) error_exit(1, "could not write command to compressed output");
}
void write_commands_to_file (const char * file, const struct command * commands, unsigned count, const unsigned char * input_stream) {
FILE * fp = fopen(file, "wb");
FILE * fp = file ? fopen(file, "wb") : stdout;
if (!fp) error_exit(1, "could not open file %s for writing", file);
while (count --) write_command_to_file(fp, *(commands ++), input_stream);
unsigned char terminator = -1;
if (fwrite(&terminator, 1, 1, fp) != 1) error_exit(1, "could not write terminator to compressed output");
fclose(fp);
if (file) fclose(fp);
}
void write_command_to_file (FILE * fp, struct command command, const unsigned char * input_stream) {
@ -113,7 +204,7 @@ void write_command_to_file (FILE * fp, struct command command, const unsigned ch
*(pos ++) = command.value;
}
}
if ((int)fwrite(buf, 1, pos - buf, fp) != (pos - buf)) error_exit(1, "could not write command to compressed output");
if (fwrite(buf, 1, pos - buf, fp) != (pos - buf)) error_exit(1, "could not write command to compressed output");
if (command.command) return;
command.count ++;
if (fwrite(input_stream + command.value, 1, command.count, fp) != command.count) error_exit(1, "could not write data to compressed output");
@ -122,16 +213,31 @@ void write_command_to_file (FILE * fp, struct command command, const unsigned ch
struct command * compress (const unsigned char * data, unsigned short * size) {
unsigned char * bitflipped = malloc(*size);
bit_flip(data, *size, bitflipped);
struct command * compressed_sequences[COMPRESSION_METHODS];
unsigned short lengths[COMPRESSION_METHODS];
struct command * compressed_sequences[COMPRESSION_METHODS + 1];
unsigned short lengths[COMPRESSION_METHODS + 1];
unsigned current;
for (current = 0; current < COMPRESSION_METHODS; current ++) {
lengths[current] = *size;
compressed_sequences[current] = try_compress(data, bitflipped, lengths + current, current);
}
free(bitflipped);
struct command * result = select_command_sequence(compressed_sequences, lengths, COMPRESSION_METHODS, size);
for (current = 0; current < COMPRESSION_METHODS; current ++) free(compressed_sequences[current]);
lengths[COMPRESSION_METHODS] = *size;
compressed_sequences[COMPRESSION_METHODS] = store_uncompressed(lengths + COMPRESSION_METHODS);
struct command * result = select_command_sequence(compressed_sequences, lengths, COMPRESSION_METHODS + 1, size);
for (current = 0; current <= COMPRESSION_METHODS; current ++) free(compressed_sequences[current]);
return result;
}
struct command * store_uncompressed (unsigned short * size) {
unsigned short position, block, remainder = *size;
struct command * result = NULL;
*size = 0;
for (position = 0; remainder; position += block, remainder -= block) {
block = (remainder > 1024) ? 1024 : remainder;
if ((block <= 64) && (block > 32)) block = 32;
result = realloc(result, sizeof(struct command) * (1 + *size));
result[(*size) ++] = (struct command) {.command = 0, .count = block, .value = position};
}
return result;
}
@ -177,11 +283,11 @@ struct command find_best_copy (const unsigned char * data, unsigned short positi
struct command simple = {.command = 7};
struct command flipped = simple, backwards = simple;
short count, offset;
if ((count = scan_forwards(data + position, length - position, data, position, &offset)))
if (count = scan_forwards(data + position, length - position, data, position, &offset))
simple = (struct command) {.command = 4, .count = count, .value = offset};
if ((count = scan_forwards(data + position, length - position, bitflipped, position, &offset)))
if (count = scan_forwards(data + position, length - position, bitflipped, position, &offset))
flipped = (struct command) {.command = 5, .count = count, .value = offset};
if ((count = scan_backwards(data, length - position, position, &offset)))
if (count = scan_backwards(data, length - position, position, &offset))
backwards = (struct command) {.command = 6, .count = count, .value = offset};
struct command command;
switch (flags / 24) {
@ -220,7 +326,8 @@ unsigned short scan_backwards (const unsigned char * data, unsigned short limit,
unsigned short position;
for (position = 0; position < real_position; position ++) {
if (data[position] != data[real_position]) continue;
for (current_length = 0; (current_length < limit) && (data[position - current_length] == data[real_position + current_length]); current_length ++);
for (current_length = 0; (current_length <= position) && (current_length < limit) &&
(data[position - current_length] == data[real_position + current_length]); current_length ++);
if (current_length > 1024) current_length = 1024;
if (current_length < best_length) continue;
best_match = position;
@ -310,7 +417,6 @@ void optimize (struct command * commands, unsigned short count) {
break;
case 1:
if (commands -> value != next -> value) break;
// falls through
case 3:
if ((commands -> count + next -> count) <= 1024) {
commands -> count += next -> count;