wok-6.x annotate linux/stuff/linux-unlzma-2.6.37.u @ rev 11871

Up: poppler to 0.18.3.
author Christopher Rogers <slaxemulator@gmail.com>
date Mon Feb 27 18:15:11 2012 -0500 (2012-02-27)
parents
children
rev   line source
slaxemulator@8085 1 --- linux-2.6.30.4/init/initramfs.c
slaxemulator@8085 2 +++ linux-2.6.30.4/init/initramfs.c
slaxemulator@8085 3 @@ -425,7 +425,8 @@
slaxemulator@8085 4 return len - count;
slaxemulator@8085 5 }
slaxemulator@8085 6
slaxemulator@8085 7 -static int __init flush_buffer(void *bufv, unsigned len)
slaxemulator@8085 8 +#define flush_buffer cpio_flush_buffer
slaxemulator@8085 9 +int __init flush_buffer(void *bufv, unsigned len)
slaxemulator@8085 10 {
slaxemulator@8085 11 char *buf = (char *) bufv;
slaxemulator@8085 12 int written;
slaxemulator@8085 13
slaxemulator@8085 14 --- linux-2.6.30.4/lib/decompress_unlzma.c
slaxemulator@8085 15 +++ linux-2.6.30.4/lib/decompress_unlzma.c
slaxemulator@8085 16 @@ -278,6 +278,10 @@
slaxemulator@8085 17 size_t global_pos;
slaxemulator@8085 18 int(*flush)(void*, unsigned int);
slaxemulator@8085 19 struct lzma_header *header;
slaxemulator@8085 20 + int is_cpio_flush;
slaxemulator@8085 21 + uint8_t **buffer_index;
slaxemulator@8085 22 + int next_index;
slaxemulator@8085 23 + int max_index;
slaxemulator@8085 24 };
slaxemulator@8085 25
slaxemulator@8085 26 struct cstate {
slaxemulator@8085 27 @@ -294,6 +298,14 @@
slaxemulator@8085 28 static inline uint8_t INIT peek_old_byte(struct writer *wr,
slaxemulator@8085 29 uint32_t offs)
slaxemulator@8085 30 {
slaxemulator@8085 31 + if (wr->is_cpio_flush) {
slaxemulator@8085 32 + int32_t pos;
slaxemulator@8085 33 + while (offs > wr->header->dict_size)
slaxemulator@8085 34 + offs -= wr->header->dict_size;
slaxemulator@8085 35 + pos = wr->buffer_pos - offs;
slaxemulator@8085 36 + return wr->buffer_index[pos / LZMA_IOBUF_SIZE]
slaxemulator@8085 37 + [pos % LZMA_IOBUF_SIZE];
slaxemulator@8085 38 + }
slaxemulator@8085 39 if (!wr->flush) {
slaxemulator@8085 40 int32_t pos;
slaxemulator@8085 41 while (offs > wr->header->dict_size)
slaxemulator@8085 42 @@ -309,8 +321,41 @@
slaxemulator@8085 43
slaxemulator@8085 44 }
slaxemulator@8085 45
slaxemulator@8085 46 +static inline void INIT write_byte_if_cpio(struct writer *wr, uint8_t byte)
slaxemulator@8085 47 +{
slaxemulator@8085 48 + if (wr->buffer_pos % LZMA_IOBUF_SIZE == 0) {
slaxemulator@8085 49 + // if the following large_malloc fails, the initramfs
slaxemulator@8085 50 + // whould not be load with is_cpio_flush forced 0 too.
slaxemulator@8085 51 + // Remember we do not allocate historic buffer.
slaxemulator@8085 52 + // Let's assume it will never fail !
slaxemulator@8085 53 + if (wr->next_index >= wr->max_index) {
slaxemulator@8085 54 + // realloc wr->buffer_index
slaxemulator@8085 55 + uint8_t **p = wr->buffer_index;
slaxemulator@8085 56 + wr->buffer_index = (uint8_t **)
slaxemulator@8085 57 + large_malloc(LZMA_IOBUF_SIZE +
slaxemulator@8085 58 + sizeof(*p) * wr->max_index);
slaxemulator@8085 59 + if (wr->max_index) {
slaxemulator@8085 60 + memcpy(wr->buffer_index, p,
slaxemulator@8085 61 + sizeof(*p) * wr->max_index);
slaxemulator@8085 62 + free(p);
slaxemulator@8085 63 + }
slaxemulator@8085 64 + wr->max_index += LZMA_IOBUF_SIZE / sizeof(*p);
slaxemulator@8085 65 + }
slaxemulator@8085 66 + wr->buffer_index[wr->next_index++] =
slaxemulator@8085 67 + (uint8_t *) large_malloc(LZMA_IOBUF_SIZE);
slaxemulator@8085 68 + }
slaxemulator@8085 69 + wr->buffer_index[wr->buffer_pos / LZMA_IOBUF_SIZE]
slaxemulator@8085 70 + [wr->buffer_pos % LZMA_IOBUF_SIZE] =
slaxemulator@8085 71 + wr->previous_byte = byte;
slaxemulator@8085 72 + wr->buffer_pos++;
slaxemulator@8085 73 +}
slaxemulator@8085 74 +
slaxemulator@8085 75 static inline void INIT write_byte(struct writer *wr, uint8_t byte)
slaxemulator@8085 76 {
slaxemulator@8085 77 + if (wr->is_cpio_flush) {
slaxemulator@8085 78 + write_byte_if_cpio(wr, byte);
slaxemulator@8085 79 + return;
slaxemulator@8085 80 + }
slaxemulator@8085 81 wr->buffer[wr->buffer_pos++] = wr->previous_byte = byte;
slaxemulator@8085 82 if (wr->flush && wr->buffer_pos == wr->header->dict_size) {
slaxemulator@8085 83 wr->buffer_pos = 0;
slaxemulator@8085 84 @@ -328,7 +373,21 @@
slaxemulator@8085 85 static inline void INIT copy_bytes(struct writer *wr,
slaxemulator@8085 86 uint32_t rep0, int len)
slaxemulator@8085 87 {
slaxemulator@8085 88 - do {
slaxemulator@8085 89 + if (wr->is_cpio_flush) {
slaxemulator@8085 90 + int32_t pos;
slaxemulator@8085 91 + uint32_t offs = rep0;
slaxemulator@8085 92 + while (offs > wr->header->dict_size)
slaxemulator@8085 93 + offs -= wr->header->dict_size;
slaxemulator@8085 94 + pos = wr->buffer_pos - offs;
slaxemulator@8085 95 + do {
slaxemulator@8085 96 + write_byte_if_cpio(wr,
slaxemulator@8085 97 + wr->buffer_index[pos / LZMA_IOBUF_SIZE]
slaxemulator@8085 98 + [pos % LZMA_IOBUF_SIZE]);
slaxemulator@8085 99 + pos++;
slaxemulator@8085 100 + len--;
slaxemulator@8085 101 + } while (len != 0 && wr->buffer_pos < wr->header->dst_size);
slaxemulator@8085 102 + }
slaxemulator@8085 103 + else do {
slaxemulator@8085 104 copy_byte(wr, rep0);
slaxemulator@8085 105 len--;
slaxemulator@8085 106 } while (len != 0 && wr->buffer_pos < wr->header->dst_size);
slaxemulator@8085 107 @@ -339,6 +398,9 @@
slaxemulator@8085 108 int pos_state, uint16_t *prob,
slaxemulator@8085 109 int lc, uint32_t literal_pos_mask) {
slaxemulator@8085 110 int mi = 1;
slaxemulator@8085 111 + static const int state[LZMA_NUM_STATES] =
slaxemulator@8085 112 + { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5 };
slaxemulator@8085 113 +
slaxemulator@8085 114 rc_update_bit_0(rc, prob);
slaxemulator@8085 115 prob = (p + LZMA_LITERAL +
slaxemulator@8085 116 (LZMA_LIT_SIZE
slaxemulator@8085 117 @@ -369,18 +431,13 @@
slaxemulator@8085 118 rc_get_bit(rc, prob_lit, &mi);
slaxemulator@8085 119 }
slaxemulator@8085 120 write_byte(wr, mi);
slaxemulator@8085 121 - if (cst->state < 4)
slaxemulator@8085 122 - cst->state = 0;
slaxemulator@8085 123 - else if (cst->state < 10)
slaxemulator@8085 124 - cst->state -= 3;
slaxemulator@8085 125 - else
slaxemulator@8085 126 - cst->state -= 6;
slaxemulator@8085 127 + cst->state = state[cst->state];
slaxemulator@8085 128 }
slaxemulator@8085 129
slaxemulator@8085 130 static inline void INIT process_bit1(struct writer *wr, struct rc *rc,
slaxemulator@8085 131 struct cstate *cst, uint16_t *p,
slaxemulator@8085 132 int pos_state, uint16_t *prob) {
slaxemulator@8085 133 - int offset;
slaxemulator@8085 134 + int offset;
slaxemulator@8085 135 uint16_t *prob_len;
slaxemulator@8085 136 int num_bits;
slaxemulator@8085 137 int len;
slaxemulator@8085 138 @@ -396,7 +453,7 @@
slaxemulator@8085 139 prob = p + LZMA_LEN_CODER;
slaxemulator@8085 140 } else {
slaxemulator@8085 141 rc_update_bit_1(rc, prob);
slaxemulator@8085 142 - prob = p + LZMA_IS_REP_G0 + cst->state;
slaxemulator@8085 143 + prob += LZMA_IS_REP_G0 - LZMA_IS_REP;
slaxemulator@8085 144 if (rc_is_bit_0(rc, prob)) {
slaxemulator@8085 145 rc_update_bit_0(rc, prob);
slaxemulator@8085 146 prob = (p + LZMA_IS_REP_0_LONG
slaxemulator@8085 147 @@ -417,13 +474,13 @@
slaxemulator@8085 148 uint32_t distance;
slaxemulator@8085 149
slaxemulator@8085 150 rc_update_bit_1(rc, prob);
slaxemulator@8085 151 - prob = p + LZMA_IS_REP_G1 + cst->state;
slaxemulator@8085 152 + prob += LZMA_IS_REP_G1 - LZMA_IS_REP_G0;
slaxemulator@8085 153 if (rc_is_bit_0(rc, prob)) {
slaxemulator@8085 154 rc_update_bit_0(rc, prob);
slaxemulator@8085 155 distance = cst->rep1;
slaxemulator@8085 156 } else {
slaxemulator@8085 157 rc_update_bit_1(rc, prob);
slaxemulator@8085 158 - prob = p + LZMA_IS_REP_G2 + cst->state;
slaxemulator@8085 159 + prob += LZMA_IS_REP_G2 - LZMA_IS_REP_G1;
slaxemulator@8085 160 if (rc_is_bit_0(rc, prob)) {
slaxemulator@8085 161 rc_update_bit_0(rc, prob);
slaxemulator@8085 162 distance = cst->rep2;
slaxemulator@8085 163 @@ -444,24 +501,24 @@
slaxemulator@8085 164 prob_len = prob + LZMA_LEN_CHOICE;
slaxemulator@8085 165 if (rc_is_bit_0(rc, prob_len)) {
slaxemulator@8085 166 rc_update_bit_0(rc, prob_len);
slaxemulator@8085 167 - prob_len = (prob + LZMA_LEN_LOW
slaxemulator@8085 168 + prob_len += LZMA_LEN_LOW - LZMA_LEN_CHOICE
slaxemulator@8085 169 + (pos_state <<
slaxemulator@8085 170 - LZMA_LEN_NUM_LOW_BITS));
slaxemulator@8085 171 + LZMA_LEN_NUM_LOW_BITS);
slaxemulator@8085 172 offset = 0;
slaxemulator@8085 173 num_bits = LZMA_LEN_NUM_LOW_BITS;
slaxemulator@8085 174 } else {
slaxemulator@8085 175 rc_update_bit_1(rc, prob_len);
slaxemulator@8085 176 - prob_len = prob + LZMA_LEN_CHOICE_2;
slaxemulator@8085 177 + prob_len += LZMA_LEN_CHOICE_2 - LZMA_LEN_CHOICE;
slaxemulator@8085 178 if (rc_is_bit_0(rc, prob_len)) {
slaxemulator@8085 179 rc_update_bit_0(rc, prob_len);
slaxemulator@8085 180 - prob_len = (prob + LZMA_LEN_MID
slaxemulator@8085 181 + prob_len += LZMA_LEN_MID - LZMA_LEN_CHOICE_2
slaxemulator@8085 182 + (pos_state <<
slaxemulator@8085 183 - LZMA_LEN_NUM_MID_BITS));
slaxemulator@8085 184 + LZMA_LEN_NUM_MID_BITS);
slaxemulator@8085 185 offset = 1 << LZMA_LEN_NUM_LOW_BITS;
slaxemulator@8085 186 num_bits = LZMA_LEN_NUM_MID_BITS;
slaxemulator@8085 187 } else {
slaxemulator@8085 188 rc_update_bit_1(rc, prob_len);
slaxemulator@8085 189 - prob_len = prob + LZMA_LEN_HIGH;
slaxemulator@8085 190 + prob_len += LZMA_LEN_HIGH - LZMA_LEN_CHOICE_2;
slaxemulator@8085 191 offset = ((1 << LZMA_LEN_NUM_LOW_BITS)
slaxemulator@8085 192 + (1 << LZMA_LEN_NUM_MID_BITS));
slaxemulator@8085 193 num_bits = LZMA_LEN_NUM_HIGH_BITS;
slaxemulator@8085 194 @@ -529,6 +586,7 @@
slaxemulator@8085 195 void(*error_fn)(char *x)
slaxemulator@8085 196 )
slaxemulator@8085 197 {
slaxemulator@8085 198 + extern int cpio_flush_buffer(void*, unsigned int);
slaxemulator@8085 199 struct lzma_header header;
slaxemulator@8085 200 int lc, pb, lp;
slaxemulator@8085 201 uint32_t pos_state_mask;
slaxemulator@8085 202 @@ -563,6 +621,10 @@
slaxemulator@8085 203 wr.global_pos = 0;
slaxemulator@8085 204 wr.previous_byte = 0;
slaxemulator@8085 205 wr.buffer_pos = 0;
slaxemulator@8085 206 + wr.is_cpio_flush = 0;
slaxemulator@8085 207 + if (flush == cpio_flush_buffer)
slaxemulator@8085 208 + wr.is_cpio_flush = 1;
slaxemulator@8085 209 + wr.buffer_index = NULL;
slaxemulator@8085 210
slaxemulator@8085 211 rc_init(&rc, fill, inbuf, in_len);
slaxemulator@8085 212
slaxemulator@8085 213 @@ -596,23 +658,23 @@
slaxemulator@8085 214 if (header.dict_size == 0)
slaxemulator@8085 215 header.dict_size = 1;
slaxemulator@8085 216
slaxemulator@8085 217 - if (output)
slaxemulator@8085 218 + if (output || wr.is_cpio_flush)
slaxemulator@8085 219 wr.buffer = output;
slaxemulator@8085 220 else {
slaxemulator@8085 221 wr.bufsize = MIN(header.dst_size, header.dict_size);
slaxemulator@8085 222 wr.buffer = large_malloc(wr.bufsize);
slaxemulator@8085 223 }
slaxemulator@8085 224 - if (wr.buffer == NULL)
slaxemulator@8085 225 + if (wr.buffer == NULL && !wr.is_cpio_flush)
slaxemulator@8085 226 goto exit_1;
slaxemulator@8085 227
slaxemulator@8085 228 num_probs = LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp));
slaxemulator@8085 229 p = (uint16_t *) large_malloc(num_probs * sizeof(*p));
slaxemulator@8085 230 if (p == 0)
slaxemulator@8085 231 goto exit_2;
slaxemulator@8085 232 - num_probs = LZMA_LITERAL + (LZMA_LIT_SIZE << (lc + lp));
slaxemulator@8085 233 + num_probs += LZMA_LITERAL - LZMA_BASE_SIZE;
slaxemulator@8085 234 for (i = 0; i < num_probs; i++)
slaxemulator@8085 235 p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
slaxemulator@8085 236 -
slaxemulator@8085 237 + wr.max_index = wr.next_index = 0;
slaxemulator@8085 238 rc_init_code(&rc);
slaxemulator@8085 239
slaxemulator@8085 240 while (get_pos(&wr) < header.dst_size) {
slaxemulator@8085 241 @@ -631,12 +693,25 @@
slaxemulator@8085 242
slaxemulator@8085 243 if (posp)
slaxemulator@8085 244 *posp = rc.ptr-rc.buffer;
slaxemulator@8085 245 - if (wr.flush)
slaxemulator@8085 246 + if (wr.is_cpio_flush) {
slaxemulator@8085 247 + int i;
slaxemulator@8085 248 + for (i = 0; i < wr.next_index -1; i++) {
slaxemulator@8085 249 + wr.flush(wr.buffer_index[i], LZMA_IOBUF_SIZE);
slaxemulator@8085 250 + large_free(wr.buffer_index[i]);
slaxemulator@8085 251 + }
slaxemulator@8085 252 + if (i < wr.next_index) {
slaxemulator@8085 253 + wr.flush(wr.buffer_index[i],
slaxemulator@8085 254 + wr.buffer_pos % LZMA_IOBUF_SIZE);
slaxemulator@8085 255 + large_free(wr.buffer_index[i]);
slaxemulator@8085 256 + }
slaxemulator@8085 257 + large_free(wr.buffer_index);
slaxemulator@8085 258 + }
slaxemulator@8085 259 + else if (wr.flush)
slaxemulator@8085 260 wr.flush(wr.buffer, wr.buffer_pos);
slaxemulator@8085 261 ret = 0;
slaxemulator@8085 262 large_free(p);
slaxemulator@8085 263 exit_2:
slaxemulator@8085 264 - if (!output)
slaxemulator@8085 265 + if (!output && !wr.is_cpio_flush)
slaxemulator@8085 266 large_free(wr.buffer);
slaxemulator@8085 267 exit_1:
slaxemulator@8085 268 if (!buf)