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bios_extract: Reset lzari state before decompression, fixes Phoenix-related issues

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This commit is contained in:
RichardG867
2022-04-14 17:40:43 -03:00
parent e5beb1dfb6
commit 1f0f10be93
1 changed files with 16 additions and 4 deletions
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20
bios_extract/src/lzari_extract.c
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@@ -34,11 +34,11 @@ static int xputc(int chr, void *skip) {
static
unsigned long int textsize = 0;
static unsigned int buffer, mask;
static
int GetBit(void) /* Get one bit (0 or 1) */
{
static unsigned int buffer, mask = 0;
if ((mask >>= 1) == 0) {
buffer = xgetc(infile); mask = 128;
}
@@ -81,8 +81,8 @@ int match_position, match_length, /* of longest match. These are
#define N_CHAR (256 - THRESHOLD + F)
/* character code = 0, 1, ..., N_CHAR - 1 */
unsigned long int low = 0, high = Q4, value = 0;
int shifts = 0; /* counts for magnifying low and high around Q2 */
unsigned long int low, high, value;
int shifts; /* counts for magnifying low and high around Q2 */
int char_to_sym[N_CHAR], sym_to_char[N_CHAR + 1];
unsigned int
sym_freq[N_CHAR + 1], /* frequency for symbols */
@@ -240,6 +240,18 @@ int unlzari(unsigned char *in, int insz, unsigned char *out, int outsz, char com
if (textsize == 0) return(0);
if (textsize < 0) return(-1);
mask = 0;
memset(text_buf, 0, sizeof(text_buf));
low = 0;
high = Q4;
value = 0;
shifts = 0;
memset(char_to_sym, 0, sizeof(char_to_sym));
memset(sym_to_char, 0, sizeof(sym_to_char));
memset(sym_freq, 0, sizeof(sym_freq));
memset(sym_cum, 0, sizeof(sym_cum));
memset(position_cum, 0, sizeof(position_cum));
StartDecode(); StartModel();
for (i = 0; i < N - F; i++) text_buf[i] = common;
r = N - F;