repos/blastem: zip.c annotate

annotate zip.c @ 2243:0d1d5dccdd28

Initial implementation of oscilloscope debug view

author	Michael Pavone <pavone@retrodev.com>
date	Tue, 22 Nov 2022 17:57:02 -0800
parents	137dbd05ceab
children	0111c8344477

rev	line source
1531 092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	1 #include <stdio.h>
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	2 #include <stdlib.h>
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	3 #include <stddef.h>
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	4 #include <string.h>
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	5 #include "util.h"
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	6 #include "zip.h"
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	7 #ifndef DISABLE_ZLIB
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	8 #include "zlib/zlib.h"
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	9 #endif
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	10
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	11 static const char cdfd_magic[4] = {'P', 'K', 1, 2};
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	12 static const char eocd_magic[4] = {'P', 'K', 5, 6};
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	13 #define MIN_EOCD_SIZE 22
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	14 #define MIN_CDFD_SIZE 46
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	15 #define ZIP_MAX_EOCD_OFFSET (64*1024+MIN_EOCD_SIZE)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	16
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	17 enum {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	18 ZIP_STORE = 0,
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	19 ZIP_DEFLATE = 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	20 };
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	21
1581 7121daaa48c2 Fix drag and drop when using Nuklear UI Michael Pavone <pavone@retrodev.com> parents: 1531 diff changeset	22 zip_file zip_open(const char filename)
1531 092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	23 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	24 FILE *f = fopen(filename, "rb");
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 if (!f) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	28 long fsize = file_size(f);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 if (fsize < MIN_EOCD_SIZE) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	30 //too small to be a zip file
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 goto fail;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	32 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	33
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	34 long max_offset = fsize > ZIP_MAX_EOCD_OFFSET ? ZIP_MAX_EOCD_OFFSET : fsize;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	35 fseek(f, -max_offset, SEEK_END);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 uint8_t *buf = malloc(max_offset);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	37 if (max_offset != fread(buf, 1, max_offset, f)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	38 goto fail;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	39 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	40
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	41 long current_offset;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	42 uint32_t cd_start, cd_size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	43 uint16_t cd_count;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 for (current_offset = max_offset - MIN_EOCD_SIZE; current_offset >= 0; current_offset--)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	45 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	46 if (memcmp(eocd_magic, buf + current_offset, sizeof(eocd_magic))) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	47 continue;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	48 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	49 uint16_t comment_size = buf[current_offset + 20] \| buf[current_offset + 21] << 8;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	50 if (comment_size != (max_offset - current_offset - MIN_EOCD_SIZE)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	51 continue;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	52 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	53 cd_start = buf[current_offset + 16] \| buf[current_offset + 17] << 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 \| buf[current_offset + 18] << 16 \| buf[current_offset + 19] << 24;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	55 if (cd_start > (fsize - (max_offset - current_offset))) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	56 continue;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	57 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	58 cd_size = buf[current_offset + 12] \| buf[current_offset + 13] << 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	59 \| buf[current_offset + 14] << 16 \| buf[current_offset + 15] << 24;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	60 if ((cd_start + cd_size) > (fsize - (max_offset - current_offset))) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	61 continue;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	62 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	63 cd_count = buf[current_offset + 10] \| buf[current_offset + 11] << 8;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	64 break;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	65 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	66 free(buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	67 if (current_offset < 0) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	68 //failed to find EOCD
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	69 goto fail;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	70 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	71 buf = malloc(cd_size);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	72 fseek(f, cd_start, SEEK_SET);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	73 if (cd_size != fread(buf, 1, cd_size, f)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	74 goto fail_free;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	75 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	76 zip_entry *entries = calloc(cd_count, sizeof(zip_entry));
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	77 uint32_t cd_max_last = cd_size - MIN_CDFD_SIZE;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	78 zip_entry *cur_entry = entries;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	79 for (uint32_t off = 0; cd_count && off <= cd_max_last; cur_entry++, cd_count--)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	80 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	81 if (memcmp(buf + off, cdfd_magic, sizeof(cdfd_magic))) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	82 goto fail_entries;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	83 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	84 uint32_t name_length = buf[off + 28] \| buf[off + 29] << 8;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	85 uint32_t extra_length = buf[off + 30] \| buf[off + 31] << 8;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	86 //TODO: verify name length doesn't go past end of CD
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	87
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	88 cur_entry->name = malloc(name_length + 1);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	89 memcpy(cur_entry->name, buf + off + MIN_CDFD_SIZE, name_length);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	90 cur_entry->name[name_length] = 0;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	91
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	92 cur_entry->compressed_size = buf[off + 20] \| buf[off + 21] << 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	93 \| buf[off + 22] << 16 \| buf[off + 23] << 24;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	94 cur_entry->size = buf[off + 24] \| buf[off + 25] << 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	95 \| buf[off + 26] << 16 \| buf[off + 27] << 24;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	96
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	97 cur_entry->local_header_off = buf[off + 42] \| buf[off + 43] << 8
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	98 \| buf[off + 44] << 16 \| buf[off + 45] << 24;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	99
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	100 cur_entry->compression_method = buf[off + 10] \| buf[off + 11] << 8;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	101
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	102 off += name_length + extra_length + MIN_CDFD_SIZE;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	103 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	104
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	105 zip_file *z = malloc(sizeof(zip_file));
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	106 z->entries = entries;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	107 z->file = f;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	108 z->num_entries = cur_entry - entries;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	109 return z;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	110
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	111 fail_entries:
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	112 for (cur_entry--; cur_entry >= entries; cur_entry--)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	113 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	114 free(cur_entry->name);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	115 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	116 free(entries);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	117 fail_free:
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	118 free(buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	119 fail:
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	120 fclose(f);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	121 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	122 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	123
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	124 uint8_t zip_read(zip_file f, uint32_t index, size_t *out_size)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	125 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	126
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	127 fseek(f->file, f->entries[index].local_header_off + 26, SEEK_SET);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	128 uint8_t tmp[4];
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	129 if (sizeof(tmp) != fread(tmp, 1, sizeof(tmp), f->file)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	130 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	131 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	132 uint32_t local_variable = (tmp[0] \| tmp[1] << 8) + (tmp[2] \| tmp[3] << 8);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	133 fseek(f->file, f->entries[index].local_header_off + local_variable + 30, SEEK_SET);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	134
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	135 size_t int_size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	136 if (!out_size) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	137 out_size = &int_size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	138 int_size = f->entries[index].size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	139 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	140
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	141 uint8_t buf = malloc(out_size);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	142 if (*out_size > f->entries[index].size) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	143 *out_size = f->entries[index].size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	144 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	145 switch(f->entries[index].compression_method)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	146 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	147 case ZIP_STORE:
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	148 if (out_size != fread(buf, 1, out_size, f->file)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	149 free(buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	150 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	151 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	152 break;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	153 #ifndef DISABLE_ZLIB
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	154 case ZIP_DEFLATE: {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	155 //note in unzip.c in zlib/contrib suggests a dummy byte is needed, so we allocate an extra byte here
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	156 uint8_t *src_buf = malloc(f->entries[index].compressed_size + 1);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	157 if (f->entries[index].compressed_size != fread(src_buf, 1, f->entries[index].compressed_size, f->file)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	158 free(src_buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	159 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	160 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	161 uLongf destLen = *out_size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	162 z_stream stream;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	163 memset(&stream, 0, sizeof(stream));
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	164 stream.avail_in = f->entries[index].compressed_size + 1;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	165 stream.next_in = src_buf;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	166 stream.next_out = buf;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	167 stream.avail_out = *out_size;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	168 if (Z_OK == inflateInit2(&stream, -15)) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 int result = inflate(&stream, Z_FINISH);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 *out_size = stream.total_out;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	171 free(src_buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 inflateEnd(&stream);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 if (result != Z_OK && result != Z_STREAM_END && result != Z_BUF_ERROR) {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 free(buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	175 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	177 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 break;
1594 137dbd05ceab Fix some issues identified by cppcheck Michael Pavone <pavone@retrodev.com> parents: 1581 diff changeset	179 }
1531 092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	180 #endif
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	181 default:
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	182 free(buf);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	183 return NULL;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	185
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 return buf;
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	188
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 void zip_close(zip_file *f)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	191 fclose(f->file);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	192 for (uint32_t i = 0; i < f->num_entries; i++)
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 {
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	194 free(f->entries[i].name);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 free(f->entries);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 free(f);
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 }
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	199
092675db4f37 Add support for loading ROMs from zip files Michael Pavone <pavone@retrodev.com> parents: diff changeset	200

Mercurial > repos > blastem

annotate zip.c @ 2243:0d1d5dccdd28