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Update lzcomp

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This commit is contained in:
aaaaaa123456789 2020-06-28 05:20:05 -03:00
parent 73d20afd15
commit 267352c4d8
3 changed files with 13 additions and 5 deletions
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2
tools/lz/mpcomp.c
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@ -101,7 +101,7 @@ struct command pick_copy_for_pass (const unsigned char * data, const unsigned ch
current = buffer + refpos - (length - 3); current = buffer + refpos - (length - 3);
else else
current = reference + refpos; current = reference + refpos;
if (memcmp(data + position, current, 4)) continue; if (memcmp(data + position, current, ((position + 4) > length) ? length - position : 4)) continue;
for (count = 4; (count < (length - position)) && (count < (length - refpos)); count ++) if (data[position + count] != current[count]) break; for (count = 4; (count < (length - position)) && (count < (length - refpos)); count ++) if (data[position + count] != current[count]) break;
if (count > (length - refpos)) count = length - refpos; if (count > (length - refpos)) count = length - refpos;
if (count > (length - position)) count = length - position; if (count > (length - position)) count = length - position;

12
tools/lz/output.c
View File

@ -28,8 +28,16 @@ void write_commands_and_padding_to_textfile (const char * file, const struct com
if (fputs("\tlzend\n", fp) < 0) error_exit(1, "could not write terminator to compressed output"); if (fputs("\tlzend\n", fp) < 0) error_exit(1, "could not write terminator to compressed output");
if (padding_size) { if (padding_size) {
input_stream += padding_offset; input_stream += padding_offset;
int rv = fprintf(fp, "\tdb $%02hhx", *(input_stream ++)); int rv = 0;
while ((rv >= 0) && (-- padding_size)) rv = fprintf(fp, ", $%02hhx", *(input_stream ++)); unsigned pos;
const char * prefix = "\tdb";
for (pos = 0; (rv >= 0) && (pos < padding_size); pos ++) {
if (input_stream[pos])
rv = fprintf(fp, "%s $%02hhx", prefix, input_stream[pos]);
else
rv = fprintf(fp, "%s 0", prefix);
prefix = ",";
}
if (rv >= 0) rv = -(putc('\n', fp) == EOF); if (rv >= 0) rv = -(putc('\n', fp) == EOF);
if (rv < 0) error_exit(1, "could not write padding to compressed output"); if (rv < 0) error_exit(1, "could not write padding to compressed output");
} }

4
tools/lz/uncomp.c
View File

@ -49,7 +49,7 @@ struct command * get_commands_from_file (const unsigned char * data, unsigned sh
} }
if (slack) *slack = *size - (rp - data); if (slack) *slack = *size - (rp - data);
*size = current - result; *size = current - result;
return realloc(result, *size * sizeof(struct command)); return realloc(result, (*size ? *size : 1) * sizeof(struct command));
error: error:
free(result); free(result);
return NULL; return NULL;
@ -88,5 +88,5 @@ unsigned char * get_uncompressed_data (const struct command * commands, const un
} }
} }
*size = current - result; *size = current - result;
return result; return realloc(result, *size ? *size : 1);
} }