github-mirrors/thirdparty-miniz
1
0
Fork 0
mirror of https://github.com/eledio-devices/thirdparty-miniz.git synced 2025-10-31 00:32:38 +01:00
Code Issues Packages Projects Releases Wiki Activity

Remove m_tables

Browse Source
This commit is contained in:
Christian Sandberg
2022-01-23 20:24:58 +01:00
parent 698faddd95
commit 8997650f5c
2 changed files with 24 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
miniz_tinfl.c
View File

@@ -108,11 +108,10 @@ extern "C" {
/* It reads just enough bytes from the input stream that are needed to decode the next Huffman code (and absolutely no more). It works by trying to fully decode a */
/* Huffman code by using whatever bits are currently present in the bit buffer. If this fails, it reads another byte, and tries again until it succeeds or until the */
/* bit buffer contains >=15 bits (deflate's max. Huffman code size). */
#define TINFL_HUFF_BITBUF_FILL(state_index, pHuff) \
#define TINFL_HUFF_BITBUF_FILL(state_index, pLookUp, pTree) \
do \
{ \
mz_int16 *pTreeFill; \
temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]; \
temp = pLookUp[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]; \
if (temp >= 0) \
{ \
code_len = temp >> 9; \
@@ -121,11 +120,10 @@ extern "C" {
} \
else if (num_bits > TINFL_FAST_LOOKUP_BITS) \
{ \
pTreeFill = (pHuff)->m_pTree; \
code_len = TINFL_FAST_LOOKUP_BITS; \
do \
{ \
temp = pTreeFill[~temp + ((bit_buf >> code_len++) & 1)]; \
temp = pTree[~temp + ((bit_buf >> code_len++) & 1)]; \
} while ((temp < 0) && (num_bits >= (code_len + 1))); \
if (temp >= 0) \
break; \
@@ -141,17 +139,16 @@ extern "C" {
/* The slow path is only executed at the very end of the input buffer. */
/* v1.16: The original macro handled the case at the very end of the passed-in input buffer, but we also need to handle the case where the user passes in 1+zillion bytes */
/* following the deflate data and our non-conservative read-ahead path won't kick in here on this code. This is much trickier. */
#define TINFL_HUFF_DECODE(state_index, sym, pHuff) \
#define TINFL_HUFF_DECODE(state_index, sym, pLookUp, pTree) \
do \
{ \
int temp; \
mz_uint code_len, c; \
mz_int16 *pTreeDec; \
if (num_bits < 15) \
{ \
if ((pIn_buf_end - pIn_buf_cur) < 2) \
{ \
TINFL_HUFF_BITBUF_FILL(state_index, pHuff); \
TINFL_HUFF_BITBUF_FILL(state_index, pLookUp, pTree); \
} \
else \
{ \
@@ -160,15 +157,14 @@ extern "C" {
num_bits += 16; \
} \
} \
if ((temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) \
if ((temp = pLookUp[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) \
code_len = temp >> 9, temp &= 511; \
else \
{ \
pTreeDec = (pHuff)->m_pTree; \
code_len = TINFL_FAST_LOOKUP_BITS; \
do \
{ \
temp = pTreeDec[~temp + ((bit_buf >> code_len++) & 1)]; \
temp = pTree[~temp + ((bit_buf >> code_len++) & 1)]; \
} while (temp < 0); \
} \
sym = temp; \
@@ -186,6 +182,9 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
static const mz_uint8 s_length_dezigzag[19] = { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 };
static const mz_uint16 s_min_table_sizes[3] = { 257, 1, 4 };
mz_int16 *pTrees[3] = { r->m_tree_0, r->m_tree_1, r->m_tree_2 };
mz_uint8 *pCode_sizes[3] = { r->m_code_size_0, r->m_code_size_1, r->m_code_size_2 };
tinfl_status status = TINFL_STATUS_FAILED;
mz_uint32 num_bits, dist, counter, num_extra;
tinfl_bit_buf_t bit_buf;
@@ -310,15 +309,15 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
for (; (int)r->m_type >= 0; r->m_type--)
{
int tree_next, tree_cur;
tinfl_huff_table *pTable;
mz_int16 *pLookUp;
mz_int16 *pTree;
mz_uint8 *pCode_size;
mz_uint i, j, used_syms, total, sym_index, next_code[17], total_syms[16];
pTable = &r->m_tables[r->m_type];
pTree = pTable->m_pTree;
pCode_size = pTable->m_pCode_size;
pLookUp = r->m_look_up[r->m_type];
pTree = pTrees[r->m_type];
pCode_size = pCode_sizes[r->m_type];
MZ_CLEAR_ARR(total_syms);
MZ_CLEAR_ARR(pTable->m_look_up);
TINFL_MEMSET(pLookUp, 0, sizeof(r->m_look_up[0]));
TINFL_MEMSET(pTree, 0, r->m_table_sizes[r->m_type] * sizeof(pTree[0]) * 2);
for (i = 0; i < r->m_table_sizes[r->m_type]; ++i)
total_syms[pCode_size[i]]++;
@@ -346,14 +345,14 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
mz_int16 k = (mz_int16)((code_size << 9) | sym_index);
while (rev_code < TINFL_FAST_LOOKUP_SIZE)
{
pTable->m_look_up[rev_code] = k;
pLookUp[rev_code] = k;
rev_code += (1 << code_size);
}
continue;
}
if (0 == (tree_cur = pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)]))
if (0 == (tree_cur = pLookUp[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)]))
{
pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)] = (mz_int16)tree_next;
pLookUp[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)] = (mz_int16)tree_next;
tree_cur = tree_next;
tree_next -= 2;
}
@@ -378,7 +377,7 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
for (counter = 0; counter < (r->m_table_sizes[0] + r->m_table_sizes[1]);)
{
mz_uint s;
TINFL_HUFF_DECODE(16, dist, &r->m_tables[2]);
TINFL_HUFF_DECODE(16, dist, r->m_look_up[2], r->m_tree_2);
if (dist < 16)
{
r->m_len_codes[counter++] = (mz_uint8)dist;
@@ -409,7 +408,7 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
{
if (((pIn_buf_end - pIn_buf_cur) < 4) || ((pOut_buf_end - pOut_buf_cur) < 2))
{
TINFL_HUFF_DECODE(23, counter, &r->m_tables[0]);
TINFL_HUFF_DECODE(23, counter, r->m_look_up[0], r->m_tree_0);
if (counter >= 256)
break;
while (pOut_buf_cur >= pOut_buf_end)
@@ -437,7 +436,7 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
num_bits += 16;
}
#endif
if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
if ((sym2 = r->m_look_up[0][bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
code_len = sym2 >> 9;
else
{
@@ -461,7 +460,7 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
num_bits += 16;
}
#endif
if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
if ((sym2 = r->m_look_up[0][bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
code_len = sym2 >> 9;
else
{
@@ -497,7 +496,7 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_nex
counter += extra_bits;
}
TINFL_HUFF_DECODE(26, dist, &r->m_tables[1]);
TINFL_HUFF_DECODE(26, dist, r->m_look_up[1], r->m_tree_1);
num_extra = s_dist_extra[dist];
dist = s_dist_base[dist];
if (num_extra)