token.c

ソースコードを見る。

列挙型
enum	{   r_init, r_idle, r_running,   r_inflating, r_inflated }
関数
void	set_compression (char *fname)
static int32	simple_recv_token (int f, char **data)
static void	simple_send_token (int f, int32 token, struct map_struct *buf, OFF_T offset, int32 n)
static void	send_deflated_token (int f, int32 token, struct map_struct *buf, OFF_T offset, int32 nb, int32 toklen)
static int32	recv_deflated_token (int f, char **data)
static void	see_deflate_token (char *buf, int32 len)
void	send_token (int f, int32 token, struct map_struct *buf, OFF_T offset, int32 n, int32 toklen)
	Transmit a verbatim buffer of length n followed by a token.
int32	recv_token (int f, char **data)
void	see_token (char *data, int32 toklen)
変数
int	do_compression
int	module_id
int	def_compress_level
static int	compression_level
static int	per_file_default_level
static int32	last_token = -1
static int32	run_start
static int32	last_run_end
static z_stream	tx_strm
static char *	obuf
static enum { ... }	recv_state
static z_stream	rx_strm
static char *	cbuf
static char *	dbuf
static int32	rx_token
static int32	rx_run

---

列挙型

anonymous enum

列挙型の値:

r_init
r_idle
r_running
r_inflating
r_inflated

token.c の 300 行で定義されています。

{ r_init, r_idle, r_running, r_inflating, r_inflated } recv_state;

---

関数

void set_compression

(

char *

fname

)

token.c の 30 行で定義されています。

参照先 compression_level・def_compress_level・do_compression・iwildmatch()・module_id・out_of_memory()・per_file_default_level.

参照元 send_files().

{
        static char *match_list;
        char *s;

        if (!do_compression)
                return;

        if (!match_list) {
                char *t, *f = lp_dont_compress(module_id);
                int len = strlen(f);
                if (!(match_list = t = new_array(char, len + 2)))
                        out_of_memory("set_compression");
                while (*f) {
                        if (*f == ' ') {
                                f++;
                                continue;
                        }
                        do {
                                if (isupper(*(unsigned char *)f))
                                        *t++ = tolower(*(unsigned char *)f);
                                else
                                        *t++ = *f;
                        } while (*++f != ' ' && *f);
                        *t++ = '\0';
                }
                /* Optimize a match-string of "*". */
                if (t - match_list == 2 && match_list[0] == '*') {
                        t = match_list;
                        per_file_default_level = 0;
                } else
                        per_file_default_level = def_compress_level;
                *t++ = '\0';
        }

        compression_level = per_file_default_level;

        if (!*match_list)
                return;

        if ((s = strrchr(fname, '/')) != NULL)
                fname = s + 1;

        for (s = match_list; *s; s += strlen(s) + 1) {
                if (iwildmatch(s, fname)) {
                        compression_level = 0;
                        break;
                }
        }
}

static int32 simple_recv_token	(	int	f,
		char **	data
	)			[static]

token.c の 82 行で定義されています。

参照先 buf・out_of_memory()・read_buf()・read_int().

参照元 recv_token().

{
        static int32 residue;
        static char *buf;
        int32 n;

        if (!buf) {
                buf = new_array(char, CHUNK_SIZE);
                if (!buf)
                        out_of_memory("simple_recv_token");
        }

        if (residue == 0) {
                int32 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 void simple_send_token	(	int	f,
		int32	token,
		struct map_struct *	buf,
		OFF_T	offset,
		int32	n
	)			[static]

token.c の 110 行で定義されています。

参照先 buf・map_ptr()・write_buf()・write_int().

参照元 send_token().

{
        if (n > 0) {
                int32 len = 0;
                while (len < n) {
                        int32 n1 = MIN(CHUNK_SIZE, n-len);
                        write_int(f, n1);
                        write_buf(f, map_ptr(buf, offset+len, n1), n1);
                        len += n1;
                }
        }
        /* a -2 token means to send data only and no token */
        if (token != -2)
                write_int(f, -(token+1));
}

static void send_deflated_token	(	int	f,
		int32	token,
		struct map_struct *	buf,
		OFF_T	offset,
		int32	nb,
		int32	toklen
	)			[static]

token.c の 165 行で定義されています。

参照先 buf・compression_level・FERROR・last_run_end・last_token・map_ptr()・obuf・out_of_memory()・rprintf()・run_start・tx_strm・write_buf()・write_byte()・write_int().

参照元 send_token().

{
        int32 n, r;
        static int init_done, flush_pending;

        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 = new_array(char, OBUF_SIZE)) == 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);
                } else {
                        write_byte(f, (n==0? TOKEN_LONG: TOKENRUN_LONG));
                        write_int(f, run_start);
                }
                if (n != 0) {
                        write_byte(f, n);
                        write_byte(f, n >> 8);
                }
                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);
                                }
                        }
                } 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);
        } else if (token != -2) {
                /* Add the data in the current block to the compressor's
                 * history and hash table. */
                do {
                        /* Break up long sections in the same way that
                         * see_deflate_token() does. */
                        int32 n1 = toklen > 0xffff ? 0xffff : toklen;
                        toklen -= n1;
                        tx_strm.next_in = (Bytef *)map_ptr(buf, offset, n1);
                        tx_strm.avail_in = n1;
                        tx_strm.next_out = (Bytef *) obuf;
                        tx_strm.avail_out = AVAIL_OUT_SIZE(CHUNK_SIZE);
                        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);
                        }
                } while (toklen > 0);
        }
}

static int32 recv_deflated_token	(	int	f,
		char **	data
	)			[static]

token.c の 312 行で定義されています。

参照先 cbuf・dbuf・FERROR・out_of_memory()・r_idle・r_inflated・r_inflating・r_init・r_running・read_buf()・read_byte()・read_int()・recv_state・rprintf()・rx_run・rx_strm・rx_token.

参照元 recv_token().

{
        static int init_done;
        static int32 saved_flag;
        int32 n, flag;
        int r;

        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 = new_array(char, MAX_DATA_COUNT))
                                    || !(dbuf = new_array(char, AVAIL_OUT_SIZE(CHUNK_SIZE))))
                                        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 = AVAIL_OUT_SIZE(CHUNK_SIZE);
                                r = inflate(&rx_strm, Z_SYNC_FLUSH);
                                n = AVAIL_OUT_SIZE(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 = AVAIL_OUT_SIZE(CHUNK_SIZE);
                        r = inflate(&rx_strm, Z_NO_FLUSH);
                        n = AVAIL_OUT_SIZE(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;
                }
        }
}

static void see_deflate_token	(	char *	buf,
		int32	len
	)			[static]

token.c の 444 行で定義されています。

参照先 dbuf・FERROR・rprintf()・rx_strm.

参照元 see_token().

{
        int r;
        int32 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 = AVAIL_OUT_SIZE(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);
}

void send_token	(	int	f,
		int32	token,
		struct map_struct *	buf,
		OFF_T	offset,
		int32	n,
		int32	toklen
	)

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

token.c の 488 行で定義されています。

参照先 buf・do_compression・send_deflated_token()・simple_send_token().

参照元 matched().

{
        if (!do_compression)
                simple_send_token(f, token, buf, offset, n);
        else
                send_deflated_token(f, token, buf, offset, n, toklen);
}

int32 recv_token	(	int	f,
		char **	data
	)

token.c の 504 行で定義されています。

参照先 do_compression・recv_deflated_token()・simple_recv_token().

参照元 receive_data().

{
        int tok;

        if (!do_compression) {
                tok = simple_recv_token(f,data);
        } else {
                tok = recv_deflated_token(f, data);
        }
        return tok;
}

void see_token	(	char *	data,
		int32	toklen
	)

token.c の 519 行で定義されています。

参照先 do_compression・see_deflate_token().

参照元 receive_data().

{
        if (do_compression)
                see_deflate_token(data, toklen);
}

---

変数

int do_compression

options.c の 72 行で定義されています。

int module_id

clientserver.c の 60 行で定義されています。

int def_compress_level

options.c の 73 行で定義されています。

int compression_level [static]

token.c の 27 行で定義されています。

参照元 send_deflated_token()・set_compression().

int per_file_default_level [static]

token.c の 27 行で定義されています。

参照元 set_compression().

int32 last_token = -1 [static]

token.c の 145 行で定義されています。

参照元 send_deflated_token().

int32 run_start [static]

token.c の 146 行で定義されています。

参照元 send_deflated_token().

int32 last_run_end [static]

token.c の 147 行で定義されています。

参照元 send_deflated_token().

z_stream tx_strm [static]

token.c の 150 行で定義されています。

参照元 send_deflated_token().

char* obuf [static]

token.c の 153 行で定義されています。

参照元 send_deflated_token().

enum { ... } recv_state [static]

参照元 recv_deflated_token().

z_stream rx_strm [static]

token.c の 303 行で定義されています。

参照元 recv_deflated_token()・see_deflate_token().

char* cbuf [static]

token.c の 304 行で定義されています。

参照元 recv_deflated_token().

char* dbuf [static]

token.c の 305 行で定義されています。

参照元 recv_deflated_token()・see_deflate_token().

int32 rx_token [static]

token.c の 308 行で定義されています。

参照元 recv_deflated_token().

int32 rx_run [static]

token.c の 309 行で定義されています。

参照元 recv_deflated_token().

---