Commit | Line | Data |
---|---|---|
d67c8bdf | 1 | /* |
70d794dc AT |
2 | Copyright (C) Andrew Tridgell 1996 |
3 | Copyright (C) Paul Mackerras 1996 | |
d67c8bdf | 4 | |
70d794dc AT |
5 | This program is free software; you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
d67c8bdf | 9 | |
70d794dc AT |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
d67c8bdf | 14 | |
70d794dc AT |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | #include "rsync.h" | |
5914bf15 | 21 | #include "zlib/zlib.h" |
70d794dc AT |
22 | |
23 | extern int do_compression; | |
d67c8bdf WD |
24 | extern int module_id; |
25 | extern int write_batch; | |
26 | ||
83fff1aa | 27 | static int compression_level = Z_DEFAULT_COMPRESSION; |
70d794dc | 28 | |
83fff1aa AT |
29 | /* determine the compression level based on a wildcard filename list */ |
30 | void set_compression(char *fname) | |
31 | { | |
83fff1aa AT |
32 | char *dont; |
33 | char *tok; | |
34 | ||
d67c8bdf WD |
35 | if (!do_compression) |
36 | return; | |
83fff1aa | 37 | |
63f0774f | 38 | compression_level = Z_DEFAULT_COMPRESSION; |
83fff1aa AT |
39 | dont = lp_dont_compress(module_id); |
40 | ||
d67c8bdf WD |
41 | if (!dont || !*dont) |
42 | return; | |
83fff1aa | 43 | |
d67c8bdf | 44 | if (dont[0] == '*' && !dont[1]) { |
63f0774f DD |
45 | /* an optimization to skip the rest of this routine */ |
46 | compression_level = 0; | |
47 | return; | |
48 | } | |
49 | ||
83fff1aa AT |
50 | dont = strdup(dont); |
51 | fname = strdup(fname); | |
d67c8bdf WD |
52 | if (!dont || !fname) |
53 | return; | |
83fff1aa AT |
54 | |
55 | strlower(dont); | |
56 | strlower(fname); | |
57 | ||
d67c8bdf | 58 | for (tok = strtok(dont, " "); tok; tok = strtok(NULL, " ")) { |
fe332038 | 59 | if (wildmatch(tok, fname)) { |
83fff1aa AT |
60 | compression_level = 0; |
61 | break; | |
62 | } | |
63 | } | |
64 | free(dont); | |
65 | free(fname); | |
66 | } | |
70d794dc AT |
67 | |
68 | /* non-compressing recv token */ | |
69 | static int simple_recv_token(int f,char **data) | |
70 | { | |
c5eb3650 AT |
71 | static int residue; |
72 | static char *buf; | |
73 | int n; | |
70d794dc | 74 | |
c5eb3650 | 75 | if (!buf) { |
58cadc86 | 76 | buf = new_array(char, CHUNK_SIZE); |
d67c8bdf WD |
77 | if (!buf) |
78 | out_of_memory("simple_recv_token"); | |
c5eb3650 | 79 | } |
70d794dc | 80 | |
c5eb3650 AT |
81 | if (residue == 0) { |
82 | int i = read_int(f); | |
d67c8bdf WD |
83 | if (i <= 0) |
84 | return i; | |
c5eb3650 AT |
85 | residue = i; |
86 | } | |
70d794dc | 87 | |
c5eb3650 AT |
88 | *data = buf; |
89 | n = MIN(CHUNK_SIZE,residue); | |
90 | residue -= n; | |
91 | read_buf(f,buf,n); | |
92 | return n; | |
70d794dc AT |
93 | } |
94 | ||
95 | ||
96 | /* non-compressing send token */ | |
c6e7fcb4 | 97 | static void simple_send_token(int f,int token, |
45f133b9 | 98 | struct map_struct *buf,OFF_T offset,int n) |
70d794dc | 99 | { |
857e38bb | 100 | int hold_int; |
6902ed17 | 101 | |
c5eb3650 AT |
102 | if (n > 0) { |
103 | int l = 0; | |
104 | while (l < n) { | |
105 | int n1 = MIN(CHUNK_SIZE,n-l); | |
106 | write_int(f,n1); | |
107 | write_buf(f,map_ptr(buf,offset+l,n1),n1); | |
6902ed17 | 108 | if (write_batch) { |
857e38bb WD |
109 | write_batch_delta_file( (char *) &n1, sizeof(int) ); |
110 | write_batch_delta_file(map_ptr(buf,offset+l,n1),n1); | |
6902ed17 | 111 | } |
c5eb3650 AT |
112 | l += n1; |
113 | } | |
114 | } | |
45f133b9 AT |
115 | /* a -2 token means to send data only and no token */ |
116 | if (token != -2) { | |
117 | write_int(f,-(token+1)); | |
6902ed17 | 118 | if (write_batch) { |
857e38bb WD |
119 | hold_int = -(token+1); |
120 | write_batch_delta_file( (char *) &hold_int, sizeof(int) ); | |
6902ed17 | 121 | } |
45f133b9 | 122 | } |
70d794dc AT |
123 | } |
124 | ||
125 | ||
861c20b4 PM |
126 | /* Flag bytes in compressed stream are encoded as follows: */ |
127 | #define END_FLAG 0 /* that's all folks */ | |
128 | #define TOKEN_LONG 0x20 /* followed by 32-bit token number */ | |
129 | #define TOKENRUN_LONG 0x21 /* ditto with 16-bit run count */ | |
130 | #define DEFLATED_DATA 0x40 /* + 6-bit high len, then low len byte */ | |
131 | #define TOKEN_REL 0x80 /* + 6-bit relative token number */ | |
132 | #define TOKENRUN_REL 0xc0 /* ditto with 16-bit run count */ | |
133 | ||
134 | #define MAX_DATA_COUNT 16383 /* fit 14 bit count into 2 bytes with flags */ | |
135 | ||
24733919 WD |
136 | /* zlib.h says that if we want to be able to compress something in a single |
137 | * call, avail_out must be at least 0.1% larger than avail_in plus 12 bytes. | |
138 | * We'll add in 0.1%+16, just to be safe (and we'll avoid floating point, | |
139 | * to ensure that this is a compile-time value). */ | |
140 | #define AVAIL_OUT_SIZE(avail_in_size) ((avail_in_size)*1001/1000+16) | |
141 | ||
861c20b4 PM |
142 | /* For coding runs of tokens */ |
143 | static int last_token = -1; | |
144 | static int run_start; | |
145 | static int last_run_end; | |
146 | ||
147 | /* Deflation state */ | |
148 | static z_stream tx_strm; | |
149 | ||
150 | /* Output buffer */ | |
3a6a366f | 151 | static char *obuf; |
24733919 WD |
152 | |
153 | /* We want obuf to be able to hold both MAX_DATA_COUNT+2 bytes as well as | |
154 | * AVAIL_OUT_SIZE(CHUNK_SIZE) bytes, so make sure that it's large enough. */ | |
155 | #if MAX_DATA_COUNT+2 > AVAIL_OUT_SIZE(CHUNK_SIZE) | |
156 | #define OBUF_SIZE (MAX_DATA_COUNT+2) | |
157 | #else | |
158 | #define OBUF_SIZE AVAIL_OUT_SIZE(CHUNK_SIZE) | |
159 | #endif | |
861c20b4 PM |
160 | |
161 | /* Send a deflated token */ | |
162 | static void | |
163 | send_deflated_token(int f, int token, | |
45f133b9 | 164 | struct map_struct *buf, OFF_T offset, int nb, int toklen) |
861c20b4 | 165 | { |
5914bf15 PM |
166 | int n, r; |
167 | static int init_done, flush_pending; | |
857e38bb | 168 | char temp_byte; |
5914bf15 PM |
169 | |
170 | if (last_token == -1) { | |
171 | /* initialization */ | |
172 | if (!init_done) { | |
173 | tx_strm.next_in = NULL; | |
174 | tx_strm.zalloc = NULL; | |
175 | tx_strm.zfree = NULL; | |
83fff1aa | 176 | if (deflateInit2(&tx_strm, compression_level, |
5914bf15 PM |
177 | Z_DEFLATED, -15, 8, |
178 | Z_DEFAULT_STRATEGY) != Z_OK) { | |
179 | rprintf(FERROR, "compression init failed\n"); | |
65417579 | 180 | exit_cleanup(RERR_STREAMIO); |
5914bf15 | 181 | } |
58cadc86 | 182 | if ((obuf = new_array(char, OBUF_SIZE)) == NULL) |
5914bf15 PM |
183 | out_of_memory("send_deflated_token"); |
184 | init_done = 1; | |
185 | } else | |
186 | deflateReset(&tx_strm); | |
187 | last_run_end = 0; | |
188 | run_start = token; | |
189 | flush_pending = 0; | |
190 | ||
191 | } else if (last_token == -2) { | |
192 | run_start = token; | |
193 | ||
194 | } else if (nb != 0 || token != last_token + 1 | |
195 | || token >= run_start + 65536) { | |
196 | /* output previous run */ | |
197 | r = run_start - last_run_end; | |
198 | n = last_token - run_start; | |
199 | if (r >= 0 && r <= 63) { | |
200 | write_byte(f, (n==0? TOKEN_REL: TOKENRUN_REL) + r); | |
857e38bb WD |
201 | if (write_batch) { |
202 | temp_byte = (char)( (n==0? TOKEN_REL: TOKENRUN_REL) + r); | |
203 | write_batch_delta_file(&temp_byte,sizeof(char)); | |
6902ed17 | 204 | } |
5914bf15 PM |
205 | } else { |
206 | write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG)); | |
207 | write_int(f, run_start); | |
857e38bb WD |
208 | if (write_batch) { |
209 | temp_byte = (char)(n==0? TOKEN_LONG: TOKENRUN_LONG); | |
4a1991d7 | 210 | write_batch_delta_file(&temp_byte,sizeof(char)); |
857e38bb | 211 | write_batch_delta_file((char *)&run_start,sizeof(run_start)); |
6902ed17 | 212 | } |
5914bf15 PM |
213 | } |
214 | if (n != 0) { | |
215 | write_byte(f, n); | |
216 | write_byte(f, n >> 8); | |
857e38bb | 217 | if (write_batch) { |
4a1991d7 WD |
218 | temp_byte = (char)n; |
219 | write_batch_delta_file(&temp_byte,sizeof(char)); | |
2a88a8cd | 220 | temp_byte = (char)(n >> 8); |
4a1991d7 | 221 | write_batch_delta_file(&temp_byte,sizeof(char)); |
6902ed17 | 222 | } |
5914bf15 PM |
223 | } |
224 | last_run_end = last_token; | |
225 | run_start = token; | |
861c20b4 | 226 | } |
5914bf15 PM |
227 | |
228 | last_token = token; | |
229 | ||
230 | if (nb != 0 || flush_pending) { | |
231 | /* deflate the data starting at offset */ | |
232 | int flush = Z_NO_FLUSH; | |
233 | tx_strm.avail_in = 0; | |
234 | tx_strm.avail_out = 0; | |
235 | do { | |
236 | if (tx_strm.avail_in == 0 && nb != 0) { | |
237 | /* give it some more input */ | |
238 | n = MIN(nb, CHUNK_SIZE); | |
239 | tx_strm.next_in = (Bytef *) | |
240 | map_ptr(buf, offset, n); | |
241 | tx_strm.avail_in = n; | |
242 | nb -= n; | |
243 | offset += n; | |
244 | } | |
245 | if (tx_strm.avail_out == 0) { | |
246 | tx_strm.next_out = (Bytef *)(obuf + 2); | |
247 | tx_strm.avail_out = MAX_DATA_COUNT; | |
248 | if (flush != Z_NO_FLUSH) { | |
249 | /* | |
250 | * We left the last 4 bytes in the | |
251 | * buffer, in case they are the | |
252 | * last 4. Move them to the front. | |
253 | */ | |
254 | memcpy(tx_strm.next_out, | |
255 | obuf+MAX_DATA_COUNT-2, 4); | |
256 | tx_strm.next_out += 4; | |
257 | tx_strm.avail_out -= 4; | |
258 | } | |
259 | } | |
260 | if (nb == 0 && token != -2) | |
261 | flush = Z_SYNC_FLUSH; | |
262 | r = deflate(&tx_strm, flush); | |
263 | if (r != Z_OK) { | |
264 | rprintf(FERROR, "deflate returned %d\n", r); | |
65417579 | 265 | exit_cleanup(RERR_STREAMIO); |
5914bf15 PM |
266 | } |
267 | if (nb == 0 || tx_strm.avail_out == 0) { | |
268 | n = MAX_DATA_COUNT - tx_strm.avail_out; | |
269 | if (flush != Z_NO_FLUSH) { | |
270 | /* | |
271 | * We have to trim off the last 4 | |
272 | * bytes of output when flushing | |
273 | * (they are just 0, 0, ff, ff). | |
274 | */ | |
275 | n -= 4; | |
276 | } | |
277 | if (n > 0) { | |
278 | obuf[0] = DEFLATED_DATA + (n >> 8); | |
279 | obuf[1] = n; | |
280 | write_buf(f, obuf, n+2); | |
857e38bb WD |
281 | if (write_batch) |
282 | write_batch_delta_file(obuf,n+2); | |
5914bf15 PM |
283 | } |
284 | } | |
285 | } while (nb != 0 || tx_strm.avail_out == 0); | |
286 | flush_pending = token == -2; | |
861c20b4 | 287 | } |
861c20b4 | 288 | |
5914bf15 PM |
289 | if (token == -1) { |
290 | /* end of file - clean up */ | |
291 | write_byte(f, END_FLAG); | |
857e38bb WD |
292 | if (write_batch) { |
293 | temp_byte = END_FLAG; | |
4a1991d7 | 294 | write_batch_delta_file(&temp_byte,sizeof(char)); |
6902ed17 | 295 | } |
861c20b4 | 296 | |
5914bf15 PM |
297 | } else if (token != -2) { |
298 | /* add the data in the current block to the compressor's | |
299 | history and hash table */ | |
300 | tx_strm.next_in = (Bytef *) map_ptr(buf, offset, toklen); | |
301 | tx_strm.avail_in = toklen; | |
302 | tx_strm.next_out = (Bytef *) obuf; | |
24733919 | 303 | tx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE); |
5914bf15 PM |
304 | r = deflate(&tx_strm, Z_INSERT_ONLY); |
305 | if (r != Z_OK || tx_strm.avail_in != 0) { | |
306 | rprintf(FERROR, "deflate on token returned %d (%d bytes left)\n", | |
307 | r, tx_strm.avail_in); | |
65417579 | 308 | exit_cleanup(RERR_STREAMIO); |
861c20b4 | 309 | } |
861c20b4 | 310 | } |
861c20b4 PM |
311 | } |
312 | ||
313 | ||
314 | /* tells us what the receiver is in the middle of doing */ | |
315 | static enum { r_init, r_idle, r_running, r_inflating, r_inflated } recv_state; | |
70d794dc | 316 | |
861c20b4 PM |
317 | /* for inflating stuff */ |
318 | static z_stream rx_strm; | |
319 | static char *cbuf; | |
320 | static char *dbuf; | |
321 | ||
322 | /* for decoding runs of tokens */ | |
323 | static int rx_token; | |
324 | static int rx_run; | |
325 | ||
326 | /* Receive a deflated token and inflate it */ | |
327 | static int | |
328 | recv_deflated_token(int f, char **data) | |
329 | { | |
5914bf15 PM |
330 | int n, r, flag; |
331 | static int init_done; | |
332 | static int saved_flag; | |
333 | ||
334 | for (;;) { | |
335 | switch (recv_state) { | |
336 | case r_init: | |
337 | if (!init_done) { | |
338 | rx_strm.next_out = NULL; | |
339 | rx_strm.zalloc = NULL; | |
340 | rx_strm.zfree = NULL; | |
341 | if (inflateInit2(&rx_strm, -15) != Z_OK) { | |
342 | rprintf(FERROR, "inflate init failed\n"); | |
65417579 | 343 | exit_cleanup(RERR_STREAMIO); |
5914bf15 | 344 | } |
58cadc86 WD |
345 | if (!(cbuf = new_array(char, MAX_DATA_COUNT)) |
346 | || !(dbuf = new_array(char, AVAIL_OUT_SIZE(CHUNK_SIZE)))) | |
5914bf15 PM |
347 | out_of_memory("recv_deflated_token"); |
348 | init_done = 1; | |
349 | } else { | |
350 | inflateReset(&rx_strm); | |
351 | } | |
b8d4524b | 352 | recv_state = r_idle; |
5914bf15 PM |
353 | rx_token = 0; |
354 | break; | |
355 | ||
356 | case r_idle: | |
357 | case r_inflated: | |
358 | if (saved_flag) { | |
359 | flag = saved_flag & 0xff; | |
360 | saved_flag = 0; | |
361 | } else | |
362 | flag = read_byte(f); | |
363 | if ((flag & 0xC0) == DEFLATED_DATA) { | |
364 | n = ((flag & 0x3f) << 8) + read_byte(f); | |
365 | read_buf(f, cbuf, n); | |
366 | rx_strm.next_in = (Bytef *)cbuf; | |
367 | rx_strm.avail_in = n; | |
368 | recv_state = r_inflating; | |
369 | break; | |
370 | } | |
371 | if (recv_state == r_inflated) { | |
372 | /* check previous inflated stuff ended correctly */ | |
373 | rx_strm.avail_in = 0; | |
374 | rx_strm.next_out = (Bytef *)dbuf; | |
1dbb94ca | 375 | rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE); |
5914bf15 | 376 | r = inflate(&rx_strm, Z_SYNC_FLUSH); |
1dbb94ca | 377 | n = AVAIL_OUT_SIZE(CHUNK_SIZE) - rx_strm.avail_out; |
5914bf15 PM |
378 | /* |
379 | * Z_BUF_ERROR just means no progress was | |
380 | * made, i.e. the decompressor didn't have | |
381 | * any pending output for us. | |
382 | */ | |
383 | if (r != Z_OK && r != Z_BUF_ERROR) { | |
384 | rprintf(FERROR, "inflate flush returned %d (%d bytes)\n", | |
385 | r, n); | |
65417579 | 386 | exit_cleanup(RERR_STREAMIO); |
5914bf15 PM |
387 | } |
388 | if (n != 0 && r != Z_BUF_ERROR) { | |
389 | /* have to return some more data and | |
390 | save the flag for later. */ | |
391 | saved_flag = flag + 0x10000; | |
392 | *data = dbuf; | |
393 | return n; | |
394 | } | |
395 | /* | |
396 | * At this point the decompressor should | |
397 | * be expecting to see the 0, 0, ff, ff bytes. | |
398 | */ | |
399 | if (!inflateSyncPoint(&rx_strm)) { | |
400 | rprintf(FERROR, "decompressor lost sync!\n"); | |
65417579 | 401 | exit_cleanup(RERR_STREAMIO); |
5914bf15 PM |
402 | } |
403 | rx_strm.avail_in = 4; | |
404 | rx_strm.next_in = (Bytef *)cbuf; | |
405 | cbuf[0] = cbuf[1] = 0; | |
406 | cbuf[2] = cbuf[3] = 0xff; | |
407 | inflate(&rx_strm, Z_SYNC_FLUSH); | |
408 | recv_state = r_idle; | |
409 | } | |
410 | if (flag == END_FLAG) { | |
411 | /* that's all folks */ | |
412 | recv_state = r_init; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /* here we have a token of some kind */ | |
417 | if (flag & TOKEN_REL) { | |
418 | rx_token += flag & 0x3f; | |
419 | flag >>= 6; | |
420 | } else | |
421 | rx_token = read_int(f); | |
422 | if (flag & 1) { | |
423 | rx_run = read_byte(f); | |
424 | rx_run += read_byte(f) << 8; | |
425 | recv_state = r_running; | |
426 | } | |
427 | return -1 - rx_token; | |
428 | ||
429 | case r_inflating: | |
430 | rx_strm.next_out = (Bytef *)dbuf; | |
1dbb94ca | 431 | rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE); |
5914bf15 | 432 | r = inflate(&rx_strm, Z_NO_FLUSH); |
1dbb94ca | 433 | n = AVAIL_OUT_SIZE(CHUNK_SIZE) - rx_strm.avail_out; |
5914bf15 PM |
434 | if (r != Z_OK) { |
435 | rprintf(FERROR, "inflate returned %d (%d bytes)\n", r, n); | |
65417579 | 436 | exit_cleanup(RERR_STREAMIO); |
5914bf15 PM |
437 | } |
438 | if (rx_strm.avail_in == 0) | |
439 | recv_state = r_inflated; | |
440 | if (n != 0) { | |
441 | *data = dbuf; | |
442 | return n; | |
443 | } | |
444 | break; | |
445 | ||
446 | case r_running: | |
447 | ++rx_token; | |
448 | if (--rx_run == 0) | |
449 | recv_state = r_idle; | |
450 | return -1 - rx_token; | |
b8d4524b | 451 | } |
861c20b4 | 452 | } |
861c20b4 PM |
453 | } |
454 | ||
455 | /* | |
456 | * put the data corresponding to a token that we've just returned | |
457 | * from recv_deflated_token into the decompressor's history buffer. | |
458 | */ | |
6e4fb64e | 459 | static void see_deflate_token(char *buf, int len) |
861c20b4 | 460 | { |
5914bf15 PM |
461 | int r, blklen; |
462 | unsigned char hdr[5]; | |
463 | ||
464 | rx_strm.avail_in = 0; | |
465 | blklen = 0; | |
466 | hdr[0] = 0; | |
467 | do { | |
468 | if (rx_strm.avail_in == 0 && len != 0) { | |
469 | if (blklen == 0) { | |
470 | /* Give it a fake stored-block header. */ | |
471 | rx_strm.next_in = (Bytef *)hdr; | |
472 | rx_strm.avail_in = 5; | |
473 | blklen = len; | |
474 | if (blklen > 0xffff) | |
475 | blklen = 0xffff; | |
476 | hdr[1] = blklen; | |
477 | hdr[2] = blklen >> 8; | |
478 | hdr[3] = ~hdr[1]; | |
479 | hdr[4] = ~hdr[2]; | |
480 | } else { | |
481 | rx_strm.next_in = (Bytef *)buf; | |
482 | rx_strm.avail_in = blklen; | |
483 | len -= blklen; | |
484 | blklen = 0; | |
485 | } | |
486 | } | |
487 | rx_strm.next_out = (Bytef *)dbuf; | |
1dbb94ca | 488 | rx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE); |
5914bf15 PM |
489 | r = inflate(&rx_strm, Z_SYNC_FLUSH); |
490 | if (r != Z_OK) { | |
491 | rprintf(FERROR, "inflate (token) returned %d\n", r); | |
65417579 | 492 | exit_cleanup(RERR_STREAMIO); |
5914bf15 PM |
493 | } |
494 | } while (len || rx_strm.avail_out == 0); | |
861c20b4 | 495 | } |
70d794dc | 496 | |
79f671cc MP |
497 | /** |
498 | * Transmit a verbatim buffer of length @p n followed by a token. | |
d67c8bdf | 499 | * If token == -1 then we have reached EOF |
70d794dc | 500 | * If n == 0 then don't send a buffer |
70d794dc | 501 | */ |
45f133b9 | 502 | void send_token(int f,int token,struct map_struct *buf,OFF_T offset, |
9e31c482 | 503 | int n,int toklen) |
70d794dc | 504 | { |
5914bf15 PM |
505 | if (!do_compression) { |
506 | simple_send_token(f,token,buf,offset,n); | |
507 | } else { | |
508 | send_deflated_token(f, token, buf, offset, n, toklen); | |
509 | } | |
70d794dc AT |
510 | } |
511 | ||
512 | ||
513 | /* | |
514 | * receive a token or buffer from the other end. If the reurn value is >0 then | |
515 | * it is a data buffer of that length, and *data will point at the data. | |
516 | * if the return value is -i then it represents token i-1 | |
517 | * if the return value is 0 then the end has been reached | |
518 | */ | |
519 | int recv_token(int f,char **data) | |
520 | { | |
5914bf15 PM |
521 | int tok; |
522 | ||
523 | if (!do_compression) { | |
524 | tok = simple_recv_token(f,data); | |
525 | } else { | |
526 | tok = recv_deflated_token(f, data); | |
527 | } | |
528 | return tok; | |
861c20b4 PM |
529 | } |
530 | ||
531 | /* | |
532 | * look at the data corresponding to a token, if necessary | |
533 | */ | |
534 | void see_token(char *data, int toklen) | |
535 | { | |
5914bf15 PM |
536 | if (do_compression) |
537 | see_deflate_token(data, toklen); | |
70d794dc | 538 | } |