diff options
Diffstat (limited to 'erts/emulator/drivers/common/zlib_drv.c')
-rw-r--r-- | erts/emulator/drivers/common/zlib_drv.c | 662 |
1 files changed, 0 insertions, 662 deletions
diff --git a/erts/emulator/drivers/common/zlib_drv.c b/erts/emulator/drivers/common/zlib_drv.c deleted file mode 100644 index 3143e4511d..0000000000 --- a/erts/emulator/drivers/common/zlib_drv.c +++ /dev/null @@ -1,662 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 2003-2013. All Rights Reserved. - * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. - * - * %CopyrightEnd% - */ - -/* - * ZLib interface for erlang - * - */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif -#include <stdio.h> -#include <zlib.h> -#include <errno.h> -#include <string.h> - -#include "erl_driver.h" - - -#define DEFLATE_INIT 1 -#define DEFLATE_INIT2 2 -#define DEFLATE_SETDICT 3 -#define DEFLATE_RESET 4 -#define DEFLATE_END 5 -#define DEFLATE_PARAMS 6 -#define DEFLATE 7 - -#define INFLATE_INIT 8 -#define INFLATE_INIT2 9 -#define INFLATE_SETDICT 10 -#define INFLATE_SYNC 11 -#define INFLATE_RESET 12 -#define INFLATE_END 13 -#define INFLATE 14 - -#define CRC32_0 15 -#define CRC32_1 16 -#define CRC32_2 17 - -#define SET_BUFSZ 18 -#define GET_BUFSZ 19 -#define GET_QSIZE 20 - -#define ADLER32_1 21 -#define ADLER32_2 22 - -#define CRC32_COMBINE 23 -#define ADLER32_COMBINE 24 - -#define DEFAULT_BUFSZ 4000 - -static int zlib_init(void); -static ErlDrvData zlib_start(ErlDrvPort port, char* buf); -static void zlib_stop(ErlDrvData e); -static void zlib_flush(ErlDrvData e); -static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *buf, - ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen); -static void zlib_outputv(ErlDrvData drv_data, ErlIOVec *ev); - -ErlDrvEntry zlib_driver_entry = { - zlib_init, - zlib_start, - zlib_stop, - NULL, /* output */ - NULL, /* ready_input */ - NULL, /* ready_output */ - "zlib_drv", - NULL, /* finish */ - NULL, /* handle */ - zlib_ctl, - NULL, /* timeout */ - zlib_outputv, - NULL, /* read_async */ - zlib_flush, - NULL, /* call */ - NULL, /* event */ - ERL_DRV_EXTENDED_MARKER, - ERL_DRV_EXTENDED_MAJOR_VERSION, - ERL_DRV_EXTENDED_MINOR_VERSION, - ERL_DRV_FLAG_USE_PORT_LOCKING, - NULL, /* handle2 */ - NULL, /* process_exit */ -}; - -typedef enum { - ST_NONE = 0, - ST_DEFLATE = 1, - ST_INFLATE = 2 -} ZLibState; - - -typedef struct { - z_stream s; - ZLibState state; - ErlDrvBinary* bin; - int binsz; - int binsz_need; - uLong crc; - int inflate_eos_seen; - int want_crc; /* 1 if crc is calculated on clear text */ - ErlDrvPort port; /* the associcated port */ -} ZLibData; - -static int zlib_inflate(ZLibData* d, int flush); -static int zlib_deflate(ZLibData* d, int flush); - -#if defined(__WIN32__) -static int i32(char* buf) -#else -static __inline__ int i32(char* buf) -#endif -{ - return (int) ( - (((int)((unsigned char*)buf)[0]) << 24) | - (((int)((unsigned char*)buf)[1]) << 16) | - (((int)((unsigned char*)buf)[2]) << 8) | - (((int)((unsigned char*)buf)[3]) << 0)); -} - -static char* zlib_reason(int code, int* err) -{ - switch(code) { - case Z_OK: - *err = 0; - return "ok"; - case Z_STREAM_END: - *err = 0; - return "stream_end"; - case Z_ERRNO: - *err = 1; - return erl_errno_id(errno); - case Z_STREAM_ERROR: - *err = 1; - return "stream_error"; - case Z_DATA_ERROR: - *err = 1; - return "data_error"; - case Z_MEM_ERROR: - *err = 1; - return "mem_error"; - case Z_BUF_ERROR: - *err = 1; - return "buf_error"; - case Z_VERSION_ERROR: - *err = 1; - return "version_error"; - default: - *err = 1; - return "unknown_error"; - } -} - - -static ErlDrvSSizeT zlib_return(int code, char** rbuf, ErlDrvSizeT rlen) -{ - int msg_code = 0; /* 0=ok, 1=error */ - char* dst = *rbuf; - char* src; - ErlDrvSizeT len = 0; - - src = zlib_reason(code, &msg_code); - *dst++ = msg_code; - rlen--; - len = 1; - - while((rlen > 0) && *src) { - *dst++ = *src++; - rlen--; - len++; - } - return len; -} - -static ErlDrvSSizeT zlib_value2(int msg_code, int value, - char** rbuf, ErlDrvSizeT rlen) -{ - char* dst = *rbuf; - - if (rlen < 5) { - return -1; - } - *dst++ = msg_code; - *dst++ = (value >> 24) & 0xff; - *dst++ = (value >> 16) & 0xff; - *dst++ = (value >> 8) & 0xff; - *dst++ = value & 0xff; - return 5; -} - -static ErlDrvSSizeT zlib_value(int value, char** rbuf, ErlDrvSizeT rlen) -{ - return zlib_value2(2, value, rbuf, rlen); -} - -static int zlib_output_init(ZLibData* d) -{ - if (d->bin != NULL) - driver_free_binary(d->bin); - if ((d->bin = driver_alloc_binary(d->binsz_need)) == NULL) - return -1; - d->binsz = d->binsz_need; - d->s.next_out = (unsigned char*)d->bin->orig_bytes; - d->s.avail_out = d->binsz; - return 0; -} - -/* - * Send compressed or uncompressed data - * and restart output procesing - */ -static int zlib_output(ZLibData* d) -{ - if (d->bin != NULL) { - int len = d->binsz - d->s.avail_out; - if (len > 0) { - if (driver_output_binary(d->port, NULL, 0, d->bin, 0, len) < 0) - return -1; - } - driver_free_binary(d->bin); - d->bin = NULL; - d->binsz = 0; - } - return zlib_output_init(d); -} - -static int zlib_inflate(ZLibData* d, int flush) -{ - int res = Z_OK; - - if ((d->bin == NULL) && (zlib_output_init(d) < 0)) { - errno = ENOMEM; - return Z_ERRNO; - } - - while ((driver_sizeq(d->port) > 0) && (res != Z_STREAM_END)) { - int vlen; - SysIOVec* iov = driver_peekq(d->port, &vlen); - int len; - int possibly_more_output = 0; - - d->s.next_in = iov[0].iov_base; - d->s.avail_in = iov[0].iov_len; - while((possibly_more_output || (d->s.avail_in > 0)) && (res != Z_STREAM_END)) { - res = inflate(&d->s, Z_NO_FLUSH); - if (res == Z_NEED_DICT) { - /* Essential to eat the header bytes that zlib has looked at */ - len = iov[0].iov_len - d->s.avail_in; - driver_deq(d->port, len); - return res; - } - if (res == Z_BUF_ERROR) { - /* Was possible more output, but actually not */ - res = Z_OK; - } - else if (res < 0) { - return res; - } - if (d->s.avail_out != 0) { - possibly_more_output = 0; - } else { - if (d->want_crc) - d->crc = crc32(d->crc, (unsigned char*)d->bin->orig_bytes, - d->binsz - d->s.avail_out); - zlib_output(d); - possibly_more_output = 1; - } - } - len = iov[0].iov_len - d->s.avail_in; - driver_deq(d->port, len); - } - - if (d->want_crc) { - d->crc = crc32(d->crc, (unsigned char*) d->bin->orig_bytes, - d->binsz - d->s.avail_out); - } - zlib_output(d); - if (res == Z_STREAM_END) { - d->inflate_eos_seen = 1; - } - return res; -} - -static int zlib_deflate(ZLibData* d, int flush) -{ - int res = Z_OK; - - if ((d->bin == NULL) && (zlib_output_init(d) < 0)) { - errno = ENOMEM; - return Z_ERRNO; - } - - while ((driver_sizeq(d->port) > 0) && (res != Z_STREAM_END)) { - int vlen; - SysIOVec* iov = driver_peekq(d->port, &vlen); - int len; - - d->s.next_in = iov[0].iov_base; - d->s.avail_in = iov[0].iov_len; - - while((d->s.avail_in > 0) && (res != Z_STREAM_END)) { - if ((res = deflate(&d->s, Z_NO_FLUSH)) < 0) { - return res; - } - if (d->s.avail_out == 0) { - zlib_output(d); - } - } - len = iov[0].iov_len - d->s.avail_in; - if (d->want_crc) { - d->crc = crc32(d->crc, iov[0].iov_base, len); - } - driver_deq(d->port, len); - } - - if (flush != Z_NO_FLUSH) { - if ((res = deflate(&d->s, flush)) < 0) { - return res; - } - if (flush == Z_FINISH) { - while (d->s.avail_out < d->binsz) { - zlib_output(d); - if (res == Z_STREAM_END) { - break; - } - if ((res = deflate(&d->s, flush)) < 0) { - return res; - } - } - } else { - while (d->s.avail_out == 0) { - zlib_output(d); - if ((res = deflate(&d->s, flush)) < 0) { - return res; - } - } - if (d->s.avail_out < d->binsz) { - zlib_output(d); - } - } - } - return res; -} - - - -static void* zlib_alloc(void* data, unsigned int items, unsigned int size) -{ - return (void*) driver_alloc(items*size); -} - -static void zlib_free(void* data, void* addr) -{ - driver_free(addr); -} - -static int zlib_init() -{ - return 0; -} - -static ErlDrvData zlib_start(ErlDrvPort port, char* buf) -{ - ZLibData* d; - - if ((d = (ZLibData*) driver_alloc(sizeof(ZLibData))) == NULL) - return ERL_DRV_ERROR_GENERAL; - - memset(&d->s, 0, sizeof(z_stream)); - - d->s.zalloc = zlib_alloc; - d->s.zfree = zlib_free; - d->s.opaque = d; - d->s.data_type = Z_BINARY; - - d->port = port; - d->state = ST_NONE; - d->bin = NULL; - d->binsz = 0; - d->binsz_need = DEFAULT_BUFSZ; - d->crc = crc32(0L, Z_NULL, 0); - d->inflate_eos_seen = 0; - d->want_crc = 0; - return (ErlDrvData)d; -} - - -static void zlib_stop(ErlDrvData e) -{ - ZLibData* d = (ZLibData*)e; - - if (d->state == ST_DEFLATE) - deflateEnd(&d->s); - else if (d->state == ST_INFLATE) - inflateEnd(&d->s); - - if (d->bin != NULL) - driver_free_binary(d->bin); - - driver_free(d); -} - -static void zlib_flush(ErlDrvData drv_data) -{ - ZLibData* d = (ZLibData*) drv_data; - - driver_deq(d->port, driver_sizeq(d->port)); -} - -static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *buf, - ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen) -{ - ZLibData* d = (ZLibData*)drv_data; - int res; - - switch(command) { - case DEFLATE_INIT: - if (len != 4) goto badarg; - if (d->state != ST_NONE) goto badarg; - res = deflateInit(&d->s, i32(buf)); - if (res == Z_OK) { - d->state = ST_DEFLATE; - d->want_crc = 0; - d->crc = crc32(0L, Z_NULL, 0); - } - return zlib_return(res, rbuf, rlen); - - case DEFLATE_INIT2: { - int wbits; - - if (len != 20) goto badarg; - if (d->state != ST_NONE) goto badarg; - wbits = i32(buf+8); - res = deflateInit2(&d->s, i32(buf), i32(buf+4), wbits, - i32(buf+12), i32(buf+16)); - if (res == Z_OK) { - d->state = ST_DEFLATE; - d->want_crc = (wbits < 0); - d->crc = crc32(0L, Z_NULL, 0); - } - return zlib_return(res, rbuf, rlen); - } - - case DEFLATE_SETDICT: - if (d->state != ST_DEFLATE) goto badarg; - res = deflateSetDictionary(&d->s, (unsigned char*)buf, len); - if (res == Z_OK) { - return zlib_value(d->s.adler, rbuf, rlen); - } else { - return zlib_return(res, rbuf, rlen); - } - - case DEFLATE_RESET: - if (len != 0) goto badarg; - if (d->state != ST_DEFLATE) goto badarg; - driver_deq(d->port, driver_sizeq(d->port)); - res = deflateReset(&d->s); - return zlib_return(res, rbuf, rlen); - - case DEFLATE_END: - if (len != 0) goto badarg; - if (d->state != ST_DEFLATE) goto badarg; - driver_deq(d->port, driver_sizeq(d->port)); - res = deflateEnd(&d->s); - d->state = ST_NONE; - return zlib_return(res, rbuf, rlen); - - case DEFLATE_PARAMS: - if (len != 8) goto badarg; - if (d->state != ST_DEFLATE) goto badarg; - res = deflateParams(&d->s, i32(buf), i32(buf+4)); - return zlib_return(res, rbuf, rlen); - - case DEFLATE: - if (d->state != ST_DEFLATE) goto badarg; - if (len != 4) goto badarg; - res = zlib_deflate(d, i32(buf)); - return zlib_return(res, rbuf, rlen); - - case INFLATE_INIT: - if (len != 0) goto badarg; - if (d->state != ST_NONE) goto badarg; - res = inflateInit(&d->s); - if (res == Z_OK) { - d->state = ST_INFLATE; - d->inflate_eos_seen = 0; - d->want_crc = 0; - d->crc = crc32(0L, Z_NULL, 0); - } - return zlib_return(res, rbuf, rlen); - - case INFLATE_INIT2: { - int wbits; - - if (len != 4) goto badarg; - if (d->state != ST_NONE) goto badarg; - wbits = i32(buf); - res = inflateInit2(&d->s, wbits); - if (res == Z_OK) { - d->state = ST_INFLATE; - d->inflate_eos_seen = 0; - d->want_crc = (wbits < 0); - d->crc = crc32(0L, Z_NULL, 0); - } - return zlib_return(res, rbuf, rlen); - } - - case INFLATE_SETDICT: - if (d->state != ST_INFLATE) goto badarg; - res = inflateSetDictionary(&d->s, (unsigned char*)buf, len); - return zlib_return(res, rbuf, rlen); - - case INFLATE_SYNC: - if (d->state != ST_INFLATE) goto badarg; - if (len != 0) goto badarg; - if (driver_sizeq(d->port) == 0) { - res = Z_BUF_ERROR; - } else { - int vlen; - SysIOVec* iov = driver_peekq(d->port, &vlen); - - d->s.next_in = iov[0].iov_base; - d->s.avail_in = iov[0].iov_len; - res = inflateSync(&d->s); - } - return zlib_return(res, rbuf, rlen); - - case INFLATE_RESET: - if (d->state != ST_INFLATE) goto badarg; - if (len != 0) goto badarg; - driver_deq(d->port, driver_sizeq(d->port)); - res = inflateReset(&d->s); - d->inflate_eos_seen = 0; - return zlib_return(res, rbuf, rlen); - - case INFLATE_END: - if (d->state != ST_INFLATE) goto badarg; - if (len != 0) goto badarg; - driver_deq(d->port, driver_sizeq(d->port)); - res = inflateEnd(&d->s); - if (res == Z_OK && d->inflate_eos_seen == 0) { - res = Z_DATA_ERROR; - } - d->state = ST_NONE; - return zlib_return(res, rbuf, rlen); - - case INFLATE: - if (d->state != ST_INFLATE) goto badarg; - if (len != 4) goto badarg; - res = zlib_inflate(d, i32(buf)); - if (res == Z_NEED_DICT) { - return zlib_value2(3, d->s.adler, rbuf, rlen); - } else { - return zlib_return(res, rbuf, rlen); - } - - case GET_QSIZE: - return zlib_value(driver_sizeq(d->port), rbuf, rlen); - - case GET_BUFSZ: - return zlib_value(d->binsz_need, rbuf, rlen); - - case SET_BUFSZ: { - int need; - if (len != 4) goto badarg; - need = i32(buf); - if ((need < 16) || (need > 0x00ffffff)) - goto badarg; - if (d->binsz_need != need) { - d->binsz_need = need; - if (d->bin != NULL) { - if (d->s.avail_out == d->binsz) { - driver_free_binary(d->bin); - d->bin = NULL; - d->binsz = 0; - } - else - zlib_output(d); - } - } - return zlib_return(Z_OK, rbuf, rlen); - } - - case CRC32_0: - return zlib_value(d->crc, rbuf, rlen); - - case CRC32_1: { - uLong crc = crc32(0L, Z_NULL, 0); - crc = crc32(crc, (unsigned char*) buf, len); - return zlib_value(crc, rbuf, rlen); - } - - case CRC32_2: { - uLong crc; - if (len < 4) goto badarg; - crc = (unsigned int) i32(buf); - crc = crc32(crc, (unsigned char*) buf+4, len-4); - return zlib_value(crc, rbuf, rlen); - } - - case ADLER32_1: { - uLong adler = adler32(0L, Z_NULL, 0); - adler = adler32(adler, (unsigned char*) buf, len); - return zlib_value(adler, rbuf, rlen); - } - - case ADLER32_2: { - uLong adler; - if (len < 4) goto badarg; - adler = (unsigned int) i32(buf); - adler = adler32(adler, (unsigned char*) buf+4, len-4); - return zlib_value(adler, rbuf, rlen); - } - - case CRC32_COMBINE: { - uLong crc, crc1, crc2, len2; - if (len != 12) goto badarg; - crc1 = (unsigned int) i32(buf); - crc2 = (unsigned int) i32(buf+4); - len2 = (unsigned int) i32(buf+8); - crc = crc32_combine(crc1, crc2, len2); - return zlib_value(crc, rbuf, rlen); - } - - case ADLER32_COMBINE: { - uLong adler, adler1, adler2, len2; - if (len != 12) goto badarg; - adler1 = (unsigned int) i32(buf); - adler2 = (unsigned int) i32(buf+4); - len2 = (unsigned int) i32(buf+8); - adler = adler32_combine(adler1, adler2, len2); - return zlib_value(adler, rbuf, rlen); - } - } - - badarg: - errno = EINVAL; - return zlib_return(Z_ERRNO, rbuf, rlen); -} - - - -static void zlib_outputv(ErlDrvData drv_data, ErlIOVec *ev) -{ - ZLibData* d = (ZLibData*) drv_data; - - driver_enqv(d->port, ev, 0); -} |