277 lines
8.9 KiB
C
277 lines
8.9 KiB
C
/* SDSLib 2.0 -- A C dynamic strings library
|
|
*
|
|
* Copyright (c) 2006-2015, Salvatore Sanfilippo <antirez at gmail dot com>
|
|
* Copyright (c) 2015, Oran Agra
|
|
* Copyright (c) 2015, Redis Labs, Inc
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Redis nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef __SDS_H
|
|
#define __SDS_H
|
|
|
|
#define SDS_MAX_PREALLOC (1024*1024)
|
|
#ifdef _MSC_VER
|
|
#define __attribute__(x)
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
|
|
typedef char *sds;
|
|
|
|
/* Note: sdshdr5 is never used, we just access the flags byte directly.
|
|
* However is here to document the layout of type 5 SDS strings. */
|
|
struct __attribute__ ((__packed__)) sdshdr5 {
|
|
unsigned char flags; /* 3 lsb of type, and 5 msb of string length */
|
|
char buf[];
|
|
};
|
|
struct __attribute__ ((__packed__)) sdshdr8 {
|
|
uint8_t len; /* used */
|
|
uint8_t alloc; /* excluding the header and null terminator */
|
|
unsigned char flags; /* 3 lsb of type, 5 unused bits */
|
|
char buf[];
|
|
};
|
|
struct __attribute__ ((__packed__)) sdshdr16 {
|
|
uint16_t len; /* used */
|
|
uint16_t alloc; /* excluding the header and null terminator */
|
|
unsigned char flags; /* 3 lsb of type, 5 unused bits */
|
|
char buf[];
|
|
};
|
|
struct __attribute__ ((__packed__)) sdshdr32 {
|
|
uint32_t len; /* used */
|
|
uint32_t alloc; /* excluding the header and null terminator */
|
|
unsigned char flags; /* 3 lsb of type, 5 unused bits */
|
|
char buf[];
|
|
};
|
|
struct __attribute__ ((__packed__)) sdshdr64 {
|
|
uint64_t len; /* used */
|
|
uint64_t alloc; /* excluding the header and null terminator */
|
|
unsigned char flags; /* 3 lsb of type, 5 unused bits */
|
|
char buf[];
|
|
};
|
|
|
|
#define SDS_TYPE_5 0
|
|
#define SDS_TYPE_8 1
|
|
#define SDS_TYPE_16 2
|
|
#define SDS_TYPE_32 3
|
|
#define SDS_TYPE_64 4
|
|
#define SDS_TYPE_MASK 7
|
|
#define SDS_TYPE_BITS 3
|
|
#define SDS_HDR_VAR(T,s) struct sdshdr##T *sh = (struct sdshdr##T *)((s)-(sizeof(struct sdshdr##T)));
|
|
#define SDS_HDR(T,s) ((struct sdshdr##T *)((s)-(sizeof(struct sdshdr##T))))
|
|
#define SDS_TYPE_5_LEN(f) ((f)>>SDS_TYPE_BITS)
|
|
|
|
static inline size_t sdslen(const sds s) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5:
|
|
return SDS_TYPE_5_LEN(flags);
|
|
case SDS_TYPE_8:
|
|
return SDS_HDR(8,s)->len;
|
|
case SDS_TYPE_16:
|
|
return SDS_HDR(16,s)->len;
|
|
case SDS_TYPE_32:
|
|
return SDS_HDR(32,s)->len;
|
|
case SDS_TYPE_64:
|
|
return SDS_HDR(64,s)->len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline size_t sdsavail(const sds s) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5: {
|
|
return 0;
|
|
}
|
|
case SDS_TYPE_8: {
|
|
SDS_HDR_VAR(8,s);
|
|
return sh->alloc - sh->len;
|
|
}
|
|
case SDS_TYPE_16: {
|
|
SDS_HDR_VAR(16,s);
|
|
return sh->alloc - sh->len;
|
|
}
|
|
case SDS_TYPE_32: {
|
|
SDS_HDR_VAR(32,s);
|
|
return sh->alloc - sh->len;
|
|
}
|
|
case SDS_TYPE_64: {
|
|
SDS_HDR_VAR(64,s);
|
|
return sh->alloc - sh->len;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void sdssetlen(sds s, size_t newlen) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5:
|
|
{
|
|
unsigned char *fp = ((unsigned char*)s)-1;
|
|
*fp = (unsigned char)(SDS_TYPE_5 | (newlen << SDS_TYPE_BITS));
|
|
}
|
|
break;
|
|
case SDS_TYPE_8:
|
|
SDS_HDR(8,s)->len = (uint8_t)newlen;
|
|
break;
|
|
case SDS_TYPE_16:
|
|
SDS_HDR(16,s)->len = (uint16_t)newlen;
|
|
break;
|
|
case SDS_TYPE_32:
|
|
SDS_HDR(32,s)->len = (uint32_t)newlen;
|
|
break;
|
|
case SDS_TYPE_64:
|
|
SDS_HDR(64,s)->len = (uint64_t)newlen;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline void sdsinclen(sds s, size_t inc) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5:
|
|
{
|
|
unsigned char *fp = ((unsigned char*)s)-1;
|
|
unsigned char newlen = SDS_TYPE_5_LEN(flags)+(unsigned char)inc;
|
|
*fp = SDS_TYPE_5 | (newlen << SDS_TYPE_BITS);
|
|
}
|
|
break;
|
|
case SDS_TYPE_8:
|
|
SDS_HDR(8,s)->len += (uint8_t)inc;
|
|
break;
|
|
case SDS_TYPE_16:
|
|
SDS_HDR(16,s)->len += (uint16_t)inc;
|
|
break;
|
|
case SDS_TYPE_32:
|
|
SDS_HDR(32,s)->len += (uint32_t)inc;
|
|
break;
|
|
case SDS_TYPE_64:
|
|
SDS_HDR(64,s)->len += (uint64_t)inc;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* sdsalloc() = sdsavail() + sdslen() */
|
|
static inline size_t sdsalloc(const sds s) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5:
|
|
return SDS_TYPE_5_LEN(flags);
|
|
case SDS_TYPE_8:
|
|
return SDS_HDR(8,s)->alloc;
|
|
case SDS_TYPE_16:
|
|
return SDS_HDR(16,s)->alloc;
|
|
case SDS_TYPE_32:
|
|
return SDS_HDR(32,s)->alloc;
|
|
case SDS_TYPE_64:
|
|
return SDS_HDR(64,s)->alloc;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void sdssetalloc(sds s, size_t newlen) {
|
|
unsigned char flags = s[-1];
|
|
switch(flags&SDS_TYPE_MASK) {
|
|
case SDS_TYPE_5:
|
|
/* Nothing to do, this type has no total allocation info. */
|
|
break;
|
|
case SDS_TYPE_8:
|
|
SDS_HDR(8,s)->alloc = (uint8_t)newlen;
|
|
break;
|
|
case SDS_TYPE_16:
|
|
SDS_HDR(16,s)->alloc = (uint16_t)newlen;
|
|
break;
|
|
case SDS_TYPE_32:
|
|
SDS_HDR(32,s)->alloc = (uint32_t)newlen;
|
|
break;
|
|
case SDS_TYPE_64:
|
|
SDS_HDR(64,s)->alloc = (uint64_t)newlen;
|
|
break;
|
|
}
|
|
}
|
|
|
|
sds sdsnewlen(const void *init, size_t initlen);
|
|
sds sdsnew(const char *init);
|
|
sds sdsempty(void);
|
|
sds sdsdup(const sds s);
|
|
void sdsfree(sds s);
|
|
sds sdsgrowzero(sds s, size_t len);
|
|
sds sdscatlen(sds s, const void *t, size_t len);
|
|
sds sdscat(sds s, const char *t);
|
|
sds sdscatsds(sds s, const sds t);
|
|
sds sdscpylen(sds s, const char *t, size_t len);
|
|
sds sdscpy(sds s, const char *t);
|
|
|
|
sds sdscatvprintf(sds s, const char *fmt, va_list ap);
|
|
#ifdef __GNUC__
|
|
sds sdscatprintf(sds s, const char *fmt, ...)
|
|
__attribute__((format(printf, 2, 3)));
|
|
#else
|
|
sds sdscatprintf(sds s, const char *fmt, ...);
|
|
#endif
|
|
|
|
sds sdscatfmt(sds s, char const *fmt, ...);
|
|
sds sdstrim(sds s, const char *cset);
|
|
void sdsrange(sds s, int start, int end);
|
|
void sdsupdatelen(sds s);
|
|
void sdsclear(sds s);
|
|
int sdscmp(const sds s1, const sds s2);
|
|
sds *sdssplitlen(const char *s, int len, const char *sep, int seplen, int *count);
|
|
void sdsfreesplitres(sds *tokens, int count);
|
|
void sdstolower(sds s);
|
|
void sdstoupper(sds s);
|
|
sds sdsfromlonglong(long long value);
|
|
sds sdscatrepr(sds s, const char *p, size_t len);
|
|
sds *sdssplitargs(const char *line, int *argc);
|
|
sds sdsmapchars(sds s, const char *from, const char *to, size_t setlen);
|
|
sds sdsjoin(char **argv, int argc, char *sep);
|
|
sds sdsjoinsds(sds *argv, int argc, const char *sep, size_t seplen);
|
|
|
|
/* Low level functions exposed to the user API */
|
|
sds sdsMakeRoomFor(sds s, size_t addlen);
|
|
void sdsIncrLen(sds s, int incr);
|
|
sds sdsRemoveFreeSpace(sds s);
|
|
size_t sdsAllocSize(sds s);
|
|
void *sdsAllocPtr(sds s);
|
|
|
|
/* Export the allocator used by SDS to the program using SDS.
|
|
* Sometimes the program SDS is linked to, may use a different set of
|
|
* allocators, but may want to allocate or free things that SDS will
|
|
* respectively free or allocate. */
|
|
void *sds_malloc(size_t size);
|
|
void *sds_realloc(void *ptr, size_t size);
|
|
void sds_free(void *ptr);
|
|
|
|
#ifdef REDIS_TEST
|
|
int sdsTest(int argc, char *argv[]);
|
|
#endif
|
|
|
|
#endif
|