*/
#include "rsync.h"
+#include "zlib/zlib.h"
extern int do_compression;
+static int compression_level = Z_DEFAULT_COMPRESSION;
+/* determine the compression level based on a wildcard filename list */
+void set_compression(char *fname)
+{
+ extern int module_id;
+ char *dont;
+ char *tok;
+
+ if (!do_compression) return;
+
+ compression_level = Z_DEFAULT_COMPRESSION;
+ dont = lp_dont_compress(module_id);
+
+ if (!dont || !*dont) return;
+
+ if ((dont[0] == '*') && (!dont[1])) {
+ /* an optimization to skip the rest of this routine */
+ compression_level = 0;
+ return;
+ }
+
+ dont = strdup(dont);
+ fname = strdup(fname);
+ if (!dont || !fname) return;
+
+ strlower(dont);
+ strlower(fname);
+
+ for (tok=strtok(dont," ");tok;tok=strtok(NULL," ")) {
+ if (fnmatch(tok, fname, 0) == 0) {
+ compression_level = 0;
+ break;
+ }
+ }
+ free(dont);
+ free(fname);
+}
/* non-compressing recv token */
static int simple_recv_token(int f,char **data)
{
- static int residue = 0;
- static char *buf = NULL;
- int n;
-
- if (!buf) {
- buf = (char *)malloc(CHUNK_SIZE);
- if (!buf) out_of_memory("simple_recv_token");
- }
-
-
- if (residue == 0) {
- int i = read_int(f);
- if (i <= 0) return i;
- residue = i;
- }
-
- *data = buf;
- n = MIN(CHUNK_SIZE,residue);
- residue -= n;
- read_buf(f,buf,n);
- return n;
+ static int residue;
+ static char *buf;
+ int n;
+
+ if (!buf) {
+ buf = (char *)malloc(CHUNK_SIZE);
+ if (!buf) out_of_memory("simple_recv_token");
+ }
+
+ if (residue == 0) {
+ int i = read_int(f);
+ if (i <= 0) return i;
+ residue = i;
+ }
+
+ *data = buf;
+ n = MIN(CHUNK_SIZE,residue);
+ residue -= n;
+ read_buf(f,buf,n);
+ return n;
}
/* non-compressing send token */
-static void simple_send_token(int f,int token,char *buf,int offset,int n)
+static void simple_send_token(int f,int token,
+ struct map_struct *buf,OFF_T offset,int n)
{
- if (n > 0) {
- int l = 0;
- while (l < n) {
- int n1 = MIN(CHUNK_SIZE,n-l);
- write_int(f,n1);
- write_buf(f,map_ptr(buf,offset+l,n1),n1);
- l += n1;
- }
- }
- write_int(f,-(token+1));
+ extern int write_batch; /* dw */
+ int hold_int; /* dw */
+
+ if (n > 0) {
+ int l = 0;
+ while (l < n) {
+ int n1 = MIN(CHUNK_SIZE,n-l);
+ write_int(f,n1);
+ write_buf(f,map_ptr(buf,offset+l,n1),n1);
+ if (write_batch) {
+ write_batch_delta_file( (char *) &n1, sizeof(int) );
+ write_batch_delta_file(map_ptr(buf,offset+l,n1),n1);
+ }
+ l += n1;
+ }
+ }
+ /* a -2 token means to send data only and no token */
+ if (token != -2) {
+ write_int(f,-(token+1));
+ if (write_batch) {
+ hold_int = -(token+1);
+ write_batch_delta_file( (char *) &hold_int, sizeof(int) );
+ }
+ }
+}
+
+
+/* Flag bytes in compressed stream are encoded as follows: */
+#define END_FLAG 0 /* that's all folks */
+#define TOKEN_LONG 0x20 /* followed by 32-bit token number */
+#define TOKENRUN_LONG 0x21 /* ditto with 16-bit run count */
+#define DEFLATED_DATA 0x40 /* + 6-bit high len, then low len byte */
+#define TOKEN_REL 0x80 /* + 6-bit relative token number */
+#define TOKENRUN_REL 0xc0 /* ditto with 16-bit run count */
+
+#define MAX_DATA_COUNT 16383 /* fit 14 bit count into 2 bytes with flags */
+
+/* For coding runs of tokens */
+static int last_token = -1;
+static int run_start;
+static int last_run_end;
+
+/* Deflation state */
+static z_stream tx_strm;
+
+/* Output buffer */
+static char *obuf;
+
+/* Send a deflated token */
+static void
+send_deflated_token(int f, int token,
+ struct map_struct *buf, OFF_T offset, int nb, int toklen)
+{
+ int n, r;
+ static int init_done, flush_pending;
+ extern int write_batch; /* dw */
+ char temp_byte; /* dw */
+
+ if (last_token == -1) {
+ /* initialization */
+ if (!init_done) {
+ tx_strm.next_in = NULL;
+ tx_strm.zalloc = NULL;
+ tx_strm.zfree = NULL;
+ if (deflateInit2(&tx_strm, compression_level,
+ Z_DEFLATED, -15, 8,
+ Z_DEFAULT_STRATEGY) != Z_OK) {
+ rprintf(FERROR, "compression init failed\n");
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if ((obuf = malloc(MAX_DATA_COUNT+2)) == NULL)
+ out_of_memory("send_deflated_token");
+ init_done = 1;
+ } else
+ deflateReset(&tx_strm);
+ last_run_end = 0;
+ run_start = token;
+ flush_pending = 0;
+
+ } else if (last_token == -2) {
+ run_start = token;
+
+ } else if (nb != 0 || token != last_token + 1
+ || token >= run_start + 65536) {
+ /* output previous run */
+ r = run_start - last_run_end;
+ n = last_token - run_start;
+ if (r >= 0 && r <= 63) {
+ write_byte(f, (n==0? TOKEN_REL: TOKENRUN_REL) + r);
+ if (write_batch) { /* dw */
+ temp_byte = (char)( (n==0? TOKEN_REL: TOKENRUN_REL) + r);
+ write_batch_delta_file(&temp_byte,sizeof(char));
+ }
+ } else {
+ write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG));
+ write_int(f, run_start);
+ if (write_batch) { /* dw */
+ temp_byte = (char)(n==0? TOKEN_LONG: TOKENRUN_LONG);
+ write_batch_delta_file(&temp_byte,sizeof(temp_byte));
+ write_batch_delta_file((char *)&run_start,sizeof(run_start));
+ }
+ }
+ if (n != 0) {
+ write_byte(f, n);
+ write_byte(f, n >> 8);
+ if (write_batch) { /* dw */
+ write_batch_delta_file((char *)&n,sizeof(char));
+ temp_byte = (char) n >> 8;
+ write_batch_delta_file(&temp_byte,sizeof(temp_byte));
+ }
+ }
+ last_run_end = last_token;
+ run_start = token;
+ }
+
+ last_token = token;
+
+ if (nb != 0 || flush_pending) {
+ /* deflate the data starting at offset */
+ int flush = Z_NO_FLUSH;
+ tx_strm.avail_in = 0;
+ tx_strm.avail_out = 0;
+ do {
+ if (tx_strm.avail_in == 0 && nb != 0) {
+ /* give it some more input */
+ n = MIN(nb, CHUNK_SIZE);
+ tx_strm.next_in = (Bytef *)
+ map_ptr(buf, offset, n);
+ tx_strm.avail_in = n;
+ nb -= n;
+ offset += n;
+ }
+ if (tx_strm.avail_out == 0) {
+ tx_strm.next_out = (Bytef *)(obuf + 2);
+ tx_strm.avail_out = MAX_DATA_COUNT;
+ if (flush != Z_NO_FLUSH) {
+ /*
+ * We left the last 4 bytes in the
+ * buffer, in case they are the
+ * last 4. Move them to the front.
+ */
+ memcpy(tx_strm.next_out,
+ obuf+MAX_DATA_COUNT-2, 4);
+ tx_strm.next_out += 4;
+ tx_strm.avail_out -= 4;
+ }
+ }
+ if (nb == 0 && token != -2)
+ flush = Z_SYNC_FLUSH;
+ r = deflate(&tx_strm, flush);
+ if (r != Z_OK) {
+ rprintf(FERROR, "deflate returned %d\n", r);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (nb == 0 || tx_strm.avail_out == 0) {
+ n = MAX_DATA_COUNT - tx_strm.avail_out;
+ if (flush != Z_NO_FLUSH) {
+ /*
+ * We have to trim off the last 4
+ * bytes of output when flushing
+ * (they are just 0, 0, ff, ff).
+ */
+ n -= 4;
+ }
+ if (n > 0) {
+ obuf[0] = DEFLATED_DATA + (n >> 8);
+ obuf[1] = n;
+ write_buf(f, obuf, n+2);
+ if (write_batch) /* dw */
+ write_batch_delta_file(obuf,n+2);
+ }
+ }
+ } while (nb != 0 || tx_strm.avail_out == 0);
+ flush_pending = token == -2;
+ }
+
+ if (token == -1) {
+ /* end of file - clean up */
+ write_byte(f, END_FLAG);
+ if (write_batch) { /* dw */
+ temp_byte = END_FLAG;
+ write_batch_delta_file((char *)&temp_byte,sizeof(temp_byte));
+ }
+
+ } else if (token != -2) {
+ /* add the data in the current block to the compressor's
+ history and hash table */
+ tx_strm.next_in = (Bytef *) map_ptr(buf, offset, toklen);
+ tx_strm.avail_in = toklen;
+ tx_strm.next_out = (Bytef *) obuf;
+ tx_strm.avail_out = MAX_DATA_COUNT;
+ r = deflate(&tx_strm, Z_INSERT_ONLY);
+ if (r != Z_OK || tx_strm.avail_in != 0) {
+ rprintf(FERROR, "deflate on token returned %d (%d bytes left)\n",
+ r, tx_strm.avail_in);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ }
}
+/* tells us what the receiver is in the middle of doing */
+static enum { r_init, r_idle, r_running, r_inflating, r_inflated } recv_state;
+/* for inflating stuff */
+static z_stream rx_strm;
+static char *cbuf;
+static char *dbuf;
+
+/* for decoding runs of tokens */
+static int rx_token;
+static int rx_run;
+
+/* Receive a deflated token and inflate it */
+static int
+recv_deflated_token(int f, char **data)
+{
+ int n, r, flag;
+ static int init_done;
+ static int saved_flag;
+
+ for (;;) {
+ switch (recv_state) {
+ case r_init:
+ if (!init_done) {
+ rx_strm.next_out = NULL;
+ rx_strm.zalloc = NULL;
+ rx_strm.zfree = NULL;
+ if (inflateInit2(&rx_strm, -15) != Z_OK) {
+ rprintf(FERROR, "inflate init failed\n");
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if ((cbuf = malloc(MAX_DATA_COUNT)) == NULL
+ || (dbuf = malloc(CHUNK_SIZE)) == NULL)
+ out_of_memory("recv_deflated_token");
+ init_done = 1;
+ } else {
+ inflateReset(&rx_strm);
+ }
+ recv_state = r_idle;
+ rx_token = 0;
+ break;
+
+ case r_idle:
+ case r_inflated:
+ if (saved_flag) {
+ flag = saved_flag & 0xff;
+ saved_flag = 0;
+ } else
+ flag = read_byte(f);
+ if ((flag & 0xC0) == DEFLATED_DATA) {
+ n = ((flag & 0x3f) << 8) + read_byte(f);
+ read_buf(f, cbuf, n);
+ rx_strm.next_in = (Bytef *)cbuf;
+ rx_strm.avail_in = n;
+ recv_state = r_inflating;
+ break;
+ }
+ if (recv_state == r_inflated) {
+ /* check previous inflated stuff ended correctly */
+ rx_strm.avail_in = 0;
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = CHUNK_SIZE;
+ r = inflate(&rx_strm, Z_SYNC_FLUSH);
+ n = CHUNK_SIZE - rx_strm.avail_out;
+ /*
+ * Z_BUF_ERROR just means no progress was
+ * made, i.e. the decompressor didn't have
+ * any pending output for us.
+ */
+ if (r != Z_OK && r != Z_BUF_ERROR) {
+ rprintf(FERROR, "inflate flush returned %d (%d bytes)\n",
+ r, n);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (n != 0 && r != Z_BUF_ERROR) {
+ /* have to return some more data and
+ save the flag for later. */
+ saved_flag = flag + 0x10000;
+ *data = dbuf;
+ return n;
+ }
+ /*
+ * At this point the decompressor should
+ * be expecting to see the 0, 0, ff, ff bytes.
+ */
+ if (!inflateSyncPoint(&rx_strm)) {
+ rprintf(FERROR, "decompressor lost sync!\n");
+ exit_cleanup(RERR_STREAMIO);
+ }
+ rx_strm.avail_in = 4;
+ rx_strm.next_in = (Bytef *)cbuf;
+ cbuf[0] = cbuf[1] = 0;
+ cbuf[2] = cbuf[3] = 0xff;
+ inflate(&rx_strm, Z_SYNC_FLUSH);
+ recv_state = r_idle;
+ }
+ if (flag == END_FLAG) {
+ /* that's all folks */
+ recv_state = r_init;
+ return 0;
+ }
+
+ /* here we have a token of some kind */
+ if (flag & TOKEN_REL) {
+ rx_token += flag & 0x3f;
+ flag >>= 6;
+ } else
+ rx_token = read_int(f);
+ if (flag & 1) {
+ rx_run = read_byte(f);
+ rx_run += read_byte(f) << 8;
+ recv_state = r_running;
+ }
+ return -1 - rx_token;
+
+ case r_inflating:
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = CHUNK_SIZE;
+ r = inflate(&rx_strm, Z_NO_FLUSH);
+ n = CHUNK_SIZE - rx_strm.avail_out;
+ if (r != Z_OK) {
+ rprintf(FERROR, "inflate returned %d (%d bytes)\n", r, n);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ if (rx_strm.avail_in == 0)
+ recv_state = r_inflated;
+ if (n != 0) {
+ *data = dbuf;
+ return n;
+ }
+ break;
+
+ case r_running:
+ ++rx_token;
+ if (--rx_run == 0)
+ recv_state = r_idle;
+ return -1 - rx_token;
+ }
+ }
+}
+
+/*
+ * put the data corresponding to a token that we've just returned
+ * from recv_deflated_token into the decompressor's history buffer.
+ */
+static void see_deflate_token(char *buf, int len)
+{
+ int r, blklen;
+ unsigned char hdr[5];
+
+ rx_strm.avail_in = 0;
+ blklen = 0;
+ hdr[0] = 0;
+ do {
+ if (rx_strm.avail_in == 0 && len != 0) {
+ if (blklen == 0) {
+ /* Give it a fake stored-block header. */
+ rx_strm.next_in = (Bytef *)hdr;
+ rx_strm.avail_in = 5;
+ blklen = len;
+ if (blklen > 0xffff)
+ blklen = 0xffff;
+ hdr[1] = blklen;
+ hdr[2] = blklen >> 8;
+ hdr[3] = ~hdr[1];
+ hdr[4] = ~hdr[2];
+ } else {
+ rx_strm.next_in = (Bytef *)buf;
+ rx_strm.avail_in = blklen;
+ len -= blklen;
+ blklen = 0;
+ }
+ }
+ rx_strm.next_out = (Bytef *)dbuf;
+ rx_strm.avail_out = CHUNK_SIZE;
+ r = inflate(&rx_strm, Z_SYNC_FLUSH);
+ if (r != Z_OK) {
+ rprintf(FERROR, "inflate (token) returned %d\n", r);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ } while (len || rx_strm.avail_out == 0);
+}
/*
* transmit a verbatim buffer of length n followed by a token
* If token == -1 then we have reached EOF
* If n == 0 then don't send a buffer
- * Note that "buf" must be used via map_ptr() starting at "offset"
*/
-void send_token(int f,int token,char *buf,int offset,int n)
+void send_token(int f,int token,struct map_struct *buf,OFF_T offset,
+ int n,int toklen)
{
- if (!do_compression) {
- simple_send_token(f,token,buf,offset,n);
- return;
- }
-
- /* compressed transmit here */
+ if (!do_compression) {
+ simple_send_token(f,token,buf,offset,n);
+ } else {
+ send_deflated_token(f, token, buf, offset, n, toklen);
+ }
}
*/
int recv_token(int f,char **data)
{
- if (!do_compression) {
- return simple_recv_token(f,data);
- }
+ int tok;
+
+ if (!do_compression) {
+ tok = simple_recv_token(f,data);
+ } else {
+ tok = recv_deflated_token(f, data);
+ }
+ return tok;
+}
- /* compressed receive here */
- return 0;
+/*
+ * look at the data corresponding to a token, if necessary
+ */
+void see_token(char *data, int toklen)
+{
+ if (do_compression)
+ see_deflate_token(data, toklen);
}
git.samba.org / rsync.git / blobdiff