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+/* 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <limits.h>
+#include "sds.h"
+#include "sdsalloc.h"
+#include "util.h"
+
+const char *SDS_NOINIT = "SDS_NOINIT";
+
+static inline int sdsHdrSize(char type) {
+ switch(type&SDS_TYPE_MASK) {
+ case SDS_TYPE_5:
+ return sizeof(struct sdshdr5);
+ case SDS_TYPE_8:
+ return sizeof(struct sdshdr8);
+ case SDS_TYPE_16:
+ return sizeof(struct sdshdr16);
+ case SDS_TYPE_32:
+ return sizeof(struct sdshdr32);
+ case SDS_TYPE_64:
+ return sizeof(struct sdshdr64);
+ }
+ return 0;
+}
+
+static inline char sdsReqType(size_t string_size) {
+ if (string_size < 1<<5)
+ return SDS_TYPE_5;
+ if (string_size < 1<<8)
+ return SDS_TYPE_8;
+ if (string_size < 1<<16)
+ return SDS_TYPE_16;
+#if (LONG_MAX == LLONG_MAX)
+ if (string_size < 1ll<<32)
+ return SDS_TYPE_32;
+ return SDS_TYPE_64;
+#else
+ return SDS_TYPE_32;
+#endif
+}
+
+static inline size_t sdsTypeMaxSize(char type) {
+ if (type == SDS_TYPE_5)
+ return (1<<5) - 1;
+ if (type == SDS_TYPE_8)
+ return (1<<8) - 1;
+ if (type == SDS_TYPE_16)
+ return (1<<16) - 1;
+#if (LONG_MAX == LLONG_MAX)
+ if (type == SDS_TYPE_32)
+ return (1ll<<32) - 1;
+#endif
+ return -1; /* this is equivalent to the max SDS_TYPE_64 or SDS_TYPE_32 */
+}
+
+/* Create a new sds string with the content specified by the 'init' pointer
+ * and 'initlen'.
+ * If NULL is used for 'init' the string is initialized with zero bytes.
+ * If SDS_NOINIT is used, the buffer is left uninitialized;
+ *
+ * The string is always null-terminated (all the sds strings are, always) so
+ * even if you create an sds string with:
+ *
+ * mystring = sdsnewlen("abc",3);
+ *
+ * You can print the string with printf() as there is an implicit \0 at the
+ * end of the string. However the string is binary safe and can contain
+ * \0 characters in the middle, as the length is stored in the sds header. */
+sds _sdsnewlen(const void *init, size_t initlen, int trymalloc) {
+ void *sh;
+ sds s;
+ char type = sdsReqType(initlen);
+ /* Empty strings are usually created in order to append. Use type 8
+ * since type 5 is not good at this. */
+ if (type == SDS_TYPE_5 && initlen == 0) type = SDS_TYPE_8;
+ int hdrlen = sdsHdrSize(type);
+ unsigned char *fp; /* flags pointer. */
+ size_t usable;
+
+ assert(initlen + hdrlen + 1 > initlen); /* Catch size_t overflow */
+ sh = trymalloc?
+ s_trymalloc_usable(hdrlen+initlen+1, &usable) :
+ s_malloc_usable(hdrlen+initlen+1, &usable);
+ if (sh == NULL) return NULL;
+ if (init==SDS_NOINIT)
+ init = NULL;
+ else if (!init)
+ memset(sh, 0, hdrlen+initlen+1);
+ s = (char*)sh+hdrlen;
+ fp = ((unsigned char*)s)-1;
+ usable = usable-hdrlen-1;
+ if (usable > sdsTypeMaxSize(type))
+ usable = sdsTypeMaxSize(type);
+ switch(type) {
+ case SDS_TYPE_5: {
+ *fp = type | (initlen << SDS_TYPE_BITS);
+ break;
+ }
+ case SDS_TYPE_8: {
+ SDS_HDR_VAR(8,s);
+ sh->len = initlen;
+ sh->alloc = usable;
+ *fp = type;
+ break;
+ }
+ case SDS_TYPE_16: {
+ SDS_HDR_VAR(16,s);
+ sh->len = initlen;
+ sh->alloc = usable;
+ *fp = type;
+ break;
+ }
+ case SDS_TYPE_32: {
+ SDS_HDR_VAR(32,s);
+ sh->len = initlen;
+ sh->alloc = usable;
+ *fp = type;
+ break;
+ }
+ case SDS_TYPE_64: {
+ SDS_HDR_VAR(64,s);
+ sh->len = initlen;
+ sh->alloc = usable;
+ *fp = type;
+ break;
+ }
+ }
+ if (initlen && init)
+ memcpy(s, init, initlen);
+ s[initlen] = '\0';
+ return s;
+}
+
+sds sdsnewlen(const void *init, size_t initlen) {
+ return _sdsnewlen(init, initlen, 0);
+}
+
+sds sdstrynewlen(const void *init, size_t initlen) {
+ return _sdsnewlen(init, initlen, 1);
+}
+
+/* Create an empty (zero length) sds string. Even in this case the string
+ * always has an implicit null term. */
+sds sdsempty(void) {
+ return sdsnewlen("",0);
+}
+
+/* Create a new sds string starting from a null terminated C string. */
+sds sdsnew(const char *init) {
+ size_t initlen = (init == NULL) ? 0 : strlen(init);
+ return sdsnewlen(init, initlen);
+}
+
+/* Duplicate an sds string. */
+sds sdsdup(const sds s) {
+ return sdsnewlen(s, sdslen(s));
+}
+
+/* Free an sds string. No operation is performed if 's' is NULL. */
+void sdsfree(sds s) {
+ if (s == NULL) return;
+ s_free((char*)s-sdsHdrSize(s[-1]));
+}
+
+/* Set the sds string length to the length as obtained with strlen(), so
+ * considering as content only up to the first null term character.
+ *
+ * This function is useful when the sds string is hacked manually in some
+ * way, like in the following example:
+ *
+ * s = sdsnew("foobar");
+ * s[2] = '\0';
+ * sdsupdatelen(s);
+ * printf("%d\n", sdslen(s));
+ *
+ * The output will be "2", but if we comment out the call to sdsupdatelen()
+ * the output will be "6" as the string was modified but the logical length
+ * remains 6 bytes. */
+void sdsupdatelen(sds s) {
+ size_t reallen = strlen(s);
+ sdssetlen(s, reallen);
+}
+
+/* Modify an sds string in-place to make it empty (zero length).
+ * However all the existing buffer is not discarded but set as free space
+ * so that next append operations will not require allocations up to the
+ * number of bytes previously available. */
+void sdsclear(sds s) {
+ sdssetlen(s, 0);
+ s[0] = '\0';
+}
+
+/* Enlarge the free space at the end of the sds string so that the caller
+ * is sure that after calling this function can overwrite up to addlen
+ * bytes after the end of the string, plus one more byte for nul term.
+ * If there's already sufficient free space, this function returns without any
+ * action, if there isn't sufficient free space, it'll allocate what's missing,
+ * and possibly more:
+ * When greedy is 1, enlarge more than needed, to avoid need for future reallocs
+ * on incremental growth.
+ * When greedy is 0, enlarge just enough so that there's free space for 'addlen'.
+ *
+ * Note: this does not change the *length* of the sds string as returned
+ * by sdslen(), but only the free buffer space we have. */
+sds _sdsMakeRoomFor(sds s, size_t addlen, int greedy) {
+ void *sh, *newsh;
+ size_t avail = sdsavail(s);
+ size_t len, newlen, reqlen;
+ char type, oldtype = s[-1] & SDS_TYPE_MASK;
+ int hdrlen;
+ size_t usable;
+
+ /* Return ASAP if there is enough space left. */
+ if (avail >= addlen) return s;
+
+ len = sdslen(s);
+ sh = (char*)s-sdsHdrSize(oldtype);
+ reqlen = newlen = (len+addlen);
+ assert(newlen > len); /* Catch size_t overflow */
+ if (greedy == 1) {
+ if (newlen < SDS_MAX_PREALLOC)
+ newlen *= 2;
+ else
+ newlen += SDS_MAX_PREALLOC;
+ }
+
+ type = sdsReqType(newlen);
+
+ /* Don't use type 5: the user is appending to the string and type 5 is
+ * not able to remember empty space, so sdsMakeRoomFor() must be called
+ * at every appending operation. */
+ if (type == SDS_TYPE_5) type = SDS_TYPE_8;
+
+ hdrlen = sdsHdrSize(type);
+ assert(hdrlen + newlen + 1 > reqlen); /* Catch size_t overflow */
+ if (oldtype==type) {
+ newsh = s_realloc_usable(sh, hdrlen+newlen+1, &usable);
+ if (newsh == NULL) return NULL;
+ s = (char*)newsh+hdrlen;
+ } else {
+ /* Since the header size changes, need to move the string forward,
+ * and can't use realloc */
+ newsh = s_malloc_usable(hdrlen+newlen+1, &usable);
+ if (newsh == NULL) return NULL;
+ memcpy((char*)newsh+hdrlen, s, len+1);
+ s_free(sh);
+ s = (char*)newsh+hdrlen;
+ s[-1] = type;
+ sdssetlen(s, len);
+ }
+ usable = usable-hdrlen-1;
+ if (usable > sdsTypeMaxSize(type))
+ usable = sdsTypeMaxSize(type);
+ sdssetalloc(s, usable);
+ return s;
+}
+
+/* Enlarge the free space at the end of the sds string more than needed,
+ * This is useful to avoid repeated re-allocations when repeatedly appending to the sds. */
+sds sdsMakeRoomFor(sds s, size_t addlen) {
+ return _sdsMakeRoomFor(s, addlen, 1);
+}
+
+/* Unlike sdsMakeRoomFor(), this one just grows to the necessary size. */
+sds sdsMakeRoomForNonGreedy(sds s, size_t addlen) {
+ return _sdsMakeRoomFor(s, addlen, 0);
+}
+
+/* Reallocate the sds string so that it has no free space at the end. The
+ * contained string remains not altered, but next concatenation operations
+ * will require a reallocation.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdsRemoveFreeSpace(sds s, int would_regrow) {
+ return sdsResize(s, sdslen(s), would_regrow);
+}
+
+/* Resize the allocation, this can make the allocation bigger or smaller,
+ * if the size is smaller than currently used len, the data will be truncated.
+ *
+ * The when the would_regrow argument is set to 1, it prevents the use of
+ * SDS_TYPE_5, which is desired when the sds is likely to be changed again.
+ *
+ * The sdsAlloc size will be set to the requested size regardless of the actual
+ * allocation size, this is done in order to avoid repeated calls to this
+ * function when the caller detects that it has excess space. */
+sds sdsResize(sds s, size_t size, int would_regrow) {
+ void *sh, *newsh;
+ char type, oldtype = s[-1] & SDS_TYPE_MASK;
+ int hdrlen, oldhdrlen = sdsHdrSize(oldtype);
+ size_t len = sdslen(s);
+ sh = (char*)s-oldhdrlen;
+
+ /* Return ASAP if the size is already good. */
+ if (sdsalloc(s) == size) return s;
+
+ /* Truncate len if needed. */
+ if (size < len) len = size;
+
+ /* Check what would be the minimum SDS header that is just good enough to
+ * fit this string. */
+ type = sdsReqType(size);
+ if (would_regrow) {
+ /* Don't use type 5, it is not good for strings that are expected to grow back. */
+ if (type == SDS_TYPE_5) type = SDS_TYPE_8;
+ }
+ hdrlen = sdsHdrSize(type);
+
+ /* If the type is the same, or can hold the size in it with low overhead
+ * (larger than SDS_TYPE_8), we just realloc(), letting the allocator
+ * to do the copy only if really needed. Otherwise if the change is
+ * huge, we manually reallocate the string to use the different header
+ * type. */
+ int use_realloc = (oldtype==type || (type < oldtype && type > SDS_TYPE_8));
+ size_t newlen = use_realloc ? oldhdrlen+size+1 : hdrlen+size+1;
+
+ if (use_realloc) {
+ int alloc_already_optimal = 0;
+ #if defined(USE_JEMALLOC)
+ /* je_nallocx returns the expected allocation size for the newlen.
+ * We aim to avoid calling realloc() when using Jemalloc if there is no
+ * change in the allocation size, as it incurs a cost even if the
+ * allocation size stays the same. */
+ alloc_already_optimal = (je_nallocx(newlen, 0) == zmalloc_size(sh));
+ #endif
+ if (!alloc_already_optimal) {
+ newsh = s_realloc(sh, newlen);
+ if (newsh == NULL) return NULL;
+ s = (char*)newsh+oldhdrlen;
+ }
+ } else {
+ newsh = s_malloc(newlen);
+ if (newsh == NULL) return NULL;
+ memcpy((char*)newsh+hdrlen, s, len);
+ s_free(sh);
+ s = (char*)newsh+hdrlen;
+ s[-1] = type;
+ }
+ s[len] = 0;
+ sdssetlen(s, len);
+ sdssetalloc(s, size);
+ return s;
+}
+
+/* Return the total size of the allocation of the specified sds string,
+ * including:
+ * 1) The sds header before the pointer.
+ * 2) The string.
+ * 3) The free buffer at the end if any.
+ * 4) The implicit null term.
+ */
+size_t sdsAllocSize(sds s) {
+ size_t alloc = sdsalloc(s);
+ return sdsHdrSize(s[-1])+alloc+1;
+}
+
+/* Return the pointer of the actual SDS allocation (normally SDS strings
+ * are referenced by the start of the string buffer). */
+void *sdsAllocPtr(sds s) {
+ return (void*) (s-sdsHdrSize(s[-1]));
+}
+
+/* Increment the sds length and decrements the left free space at the
+ * end of the string according to 'incr'. Also set the null term
+ * in the new end of the string.
+ *
+ * This function is used in order to fix the string length after the
+ * user calls sdsMakeRoomFor(), writes something after the end of
+ * the current string, and finally needs to set the new length.
+ *
+ * Note: it is possible to use a negative increment in order to
+ * right-trim the string.
+ *
+ * Usage example:
+ *
+ * Using sdsIncrLen() and sdsMakeRoomFor() it is possible to mount the
+ * following schema, to cat bytes coming from the kernel to the end of an
+ * sds string without copying into an intermediate buffer:
+ *
+ * oldlen = sdslen(s);
+ * s = sdsMakeRoomFor(s, BUFFER_SIZE);
+ * nread = read(fd, s+oldlen, BUFFER_SIZE);
+ * ... check for nread <= 0 and handle it ...
+ * sdsIncrLen(s, nread);
+ */
+void sdsIncrLen(sds s, ssize_t incr) {
+ unsigned char flags = s[-1];
+ size_t len;
+ switch(flags&SDS_TYPE_MASK) {
+ case SDS_TYPE_5: {
+ unsigned char *fp = ((unsigned char*)s)-1;
+ unsigned char oldlen = SDS_TYPE_5_LEN(flags);
+ assert((incr > 0 && oldlen+incr < 32) || (incr < 0 && oldlen >= (unsigned int)(-incr)));
+ *fp = SDS_TYPE_5 | ((oldlen+incr) << SDS_TYPE_BITS);
+ len = oldlen+incr;
+ break;
+ }
+ case SDS_TYPE_8: {
+ SDS_HDR_VAR(8,s);
+ assert((incr >= 0 && sh->alloc-sh->len >= incr) || (incr < 0 && sh->len >= (unsigned int)(-incr)));
+ len = (sh->len += incr);
+ break;
+ }
+ case SDS_TYPE_16: {
+ SDS_HDR_VAR(16,s);
+ assert((incr >= 0 && sh->alloc-sh->len >= incr) || (incr < 0 && sh->len >= (unsigned int)(-incr)));
+ len = (sh->len += incr);
+ break;
+ }
+ case SDS_TYPE_32: {
+ SDS_HDR_VAR(32,s);
+ assert((incr >= 0 && sh->alloc-sh->len >= (unsigned int)incr) || (incr < 0 && sh->len >= (unsigned int)(-incr)));
+ len = (sh->len += incr);
+ break;
+ }
+ case SDS_TYPE_64: {
+ SDS_HDR_VAR(64,s);
+ assert((incr >= 0 && sh->alloc-sh->len >= (uint64_t)incr) || (incr < 0 && sh->len >= (uint64_t)(-incr)));
+ len = (sh->len += incr);
+ break;
+ }
+ default: len = 0; /* Just to avoid compilation warnings. */
+ }
+ s[len] = '\0';
+}
+
+/* Grow the sds to have the specified length. Bytes that were not part of
+ * the original length of the sds will be set to zero.
+ *
+ * if the specified length is smaller than the current length, no operation
+ * is performed. */
+sds sdsgrowzero(sds s, size_t len) {
+ size_t curlen = sdslen(s);
+
+ if (len <= curlen) return s;
+ s = sdsMakeRoomFor(s,len-curlen);
+ if (s == NULL) return NULL;
+
+ /* Make sure added region doesn't contain garbage */
+ memset(s+curlen,0,(len-curlen+1)); /* also set trailing \0 byte */
+ sdssetlen(s, len);
+ return s;
+}
+
+/* Append the specified binary-safe string pointed by 't' of 'len' bytes to the
+ * end of the specified sds string 's'.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscatlen(sds s, const void *t, size_t len) {
+ size_t curlen = sdslen(s);
+
+ s = sdsMakeRoomFor(s,len);
+ if (s == NULL) return NULL;
+ memcpy(s+curlen, t, len);
+ sdssetlen(s, curlen+len);
+ s[curlen+len] = '\0';
+ return s;
+}
+
+/* Append the specified null terminated C string to the sds string 's'.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscat(sds s, const char *t) {
+ return sdscatlen(s, t, strlen(t));
+}
+
+/* Append the specified sds 't' to the existing sds 's'.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscatsds(sds s, const sds t) {
+ return sdscatlen(s, t, sdslen(t));
+}
+
+/* Destructively modify the sds string 's' to hold the specified binary
+ * safe string pointed by 't' of length 'len' bytes. */
+sds sdscpylen(sds s, const char *t, size_t len) {
+ if (sdsalloc(s) < len) {
+ s = sdsMakeRoomFor(s,len-sdslen(s));
+ if (s == NULL) return NULL;
+ }
+ memcpy(s, t, len);
+ s[len] = '\0';
+ sdssetlen(s, len);
+ return s;
+}
+
+/* Like sdscpylen() but 't' must be a null-terminated string so that the length
+ * of the string is obtained with strlen(). */
+sds sdscpy(sds s, const char *t) {
+ return sdscpylen(s, t, strlen(t));
+}
+
+/* Create an sds string from a long long value. It is much faster than:
+ *
+ * sdscatprintf(sdsempty(),"%lld\n", value);
+ */
+sds sdsfromlonglong(long long value) {
+ char buf[LONG_STR_SIZE];
+ int len = ll2string(buf,sizeof(buf),value);
+
+ return sdsnewlen(buf,len);
+}
+
+/* Like sdscatprintf() but gets va_list instead of being variadic. */
+sds sdscatvprintf(sds s, const char *fmt, va_list ap) {
+ va_list cpy;
+ char staticbuf[1024], *buf = staticbuf, *t;
+ size_t buflen = strlen(fmt)*2;
+ int bufstrlen;
+
+ /* We try to start using a static buffer for speed.
+ * If not possible we revert to heap allocation. */
+ if (buflen > sizeof(staticbuf)) {
+ buf = s_malloc(buflen);
+ if (buf == NULL) return NULL;
+ } else {
+ buflen = sizeof(staticbuf);
+ }
+
+ /* Alloc enough space for buffer and \0 after failing to
+ * fit the string in the current buffer size. */
+ while(1) {
+ va_copy(cpy,ap);
+ bufstrlen = vsnprintf(buf, buflen, fmt, cpy);
+ va_end(cpy);
+ if (bufstrlen < 0) {
+ if (buf != staticbuf) s_free(buf);
+ return NULL;
+ }
+ if (((size_t)bufstrlen) >= buflen) {
+ if (buf != staticbuf) s_free(buf);
+ buflen = ((size_t)bufstrlen) + 1;
+ buf = s_malloc(buflen);
+ if (buf == NULL) return NULL;
+ continue;
+ }
+ break;
+ }
+
+ /* Finally concat the obtained string to the SDS string and return it. */
+ t = sdscatlen(s, buf, bufstrlen);
+ if (buf != staticbuf) s_free(buf);
+ return t;
+}
+
+/* Append to the sds string 's' a string obtained using printf-alike format
+ * specifier.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call.
+ *
+ * Example:
+ *
+ * s = sdsnew("Sum is: ");
+ * s = sdscatprintf(s,"%d+%d = %d",a,b,a+b).
+ *
+ * Often you need to create a string from scratch with the printf-alike
+ * format. When this is the need, just use sdsempty() as the target string:
+ *
+ * s = sdscatprintf(sdsempty(), "... your format ...", args);
+ */
+sds sdscatprintf(sds s, const char *fmt, ...) {
+ va_list ap;
+ char *t;
+ va_start(ap, fmt);
+ t = sdscatvprintf(s,fmt,ap);
+ va_end(ap);
+ return t;
+}
+
+/* This function is similar to sdscatprintf, but much faster as it does
+ * not rely on sprintf() family functions implemented by the libc that
+ * are often very slow. Moreover directly handling the sds string as
+ * new data is concatenated provides a performance improvement.
+ *
+ * However this function only handles an incompatible subset of printf-alike
+ * format specifiers:
+ *
+ * %s - C String
+ * %S - SDS string
+ * %i - signed int
+ * %I - 64 bit signed integer (long long, int64_t)
+ * %u - unsigned int
+ * %U - 64 bit unsigned integer (unsigned long long, uint64_t)
+ * %% - Verbatim "%" character.
+ */
+sds sdscatfmt(sds s, char const *fmt, ...) {
+ size_t initlen = sdslen(s);
+ const char *f = fmt;
+ long i;
+ va_list ap;
+
+ /* To avoid continuous reallocations, let's start with a buffer that
+ * can hold at least two times the format string itself. It's not the
+ * best heuristic but seems to work in practice. */
+ s = sdsMakeRoomFor(s, strlen(fmt)*2);
+ va_start(ap,fmt);
+ f = fmt; /* Next format specifier byte to process. */
+ i = initlen; /* Position of the next byte to write to dest str. */
+ while(*f) {
+ char next, *str;
+ size_t l;
+ long long num;
+ unsigned long long unum;
+
+ /* Make sure there is always space for at least 1 char. */
+ if (sdsavail(s)==0) {
+ s = sdsMakeRoomFor(s,1);
+ }
+
+ switch(*f) {
+ case '%':
+ next = *(f+1);
+ if (next == '\0') break;
+ f++;
+ switch(next) {
+ case 's':
+ case 'S':
+ str = va_arg(ap,char*);
+ l = (next == 's') ? strlen(str) : sdslen(str);
+ if (sdsavail(s) < l) {
+ s = sdsMakeRoomFor(s,l);
+ }
+ memcpy(s+i,str,l);
+ sdsinclen(s,l);
+ i += l;
+ break;
+ case 'i':
+ case 'I':
+ if (next == 'i')
+ num = va_arg(ap,int);
+ else
+ num = va_arg(ap,long long);
+ {
+ char buf[LONG_STR_SIZE];
+ l = ll2string(buf,sizeof(buf),num);
+ if (sdsavail(s) < l) {
+ s = sdsMakeRoomFor(s,l);
+ }
+ memcpy(s+i,buf,l);
+ sdsinclen(s,l);
+ i += l;
+ }
+ break;
+ case 'u':
+ case 'U':
+ if (next == 'u')
+ unum = va_arg(ap,unsigned int);
+ else
+ unum = va_arg(ap,unsigned long long);
+ {
+ char buf[LONG_STR_SIZE];
+ l = ull2string(buf,sizeof(buf),unum);
+ if (sdsavail(s) < l) {
+ s = sdsMakeRoomFor(s,l);
+ }
+ memcpy(s+i,buf,l);
+ sdsinclen(s,l);
+ i += l;
+ }
+ break;
+ default: /* Handle %% and generally %<unknown>. */
+ s[i++] = next;
+ sdsinclen(s,1);
+ break;
+ }
+ break;
+ default:
+ s[i++] = *f;
+ sdsinclen(s,1);
+ break;
+ }
+ f++;
+ }
+ va_end(ap);
+
+ /* Add null-term */
+ s[i] = '\0';
+ return s;
+}
+
+/* Remove the part of the string from left and from right composed just of
+ * contiguous characters found in 'cset', that is a null terminated C string.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call.
+ *
+ * Example:
+ *
+ * s = sdsnew("AA...AA.a.aa.aHelloWorld :::");
+ * s = sdstrim(s,"Aa. :");
+ * printf("%s\n", s);
+ *
+ * Output will be just "HelloWorld".
+ */
+sds sdstrim(sds s, const char *cset) {
+ char *end, *sp, *ep;
+ size_t len;
+
+ sp = s;
+ ep = end = s+sdslen(s)-1;
+ while(sp <= end && strchr(cset, *sp)) sp++;
+ while(ep > sp && strchr(cset, *ep)) ep--;
+ len = (ep-sp)+1;
+ if (s != sp) memmove(s, sp, len);
+ s[len] = '\0';
+ sdssetlen(s,len);
+ return s;
+}
+
+/* Changes the input string to be a subset of the original.
+ * It does not release the free space in the string, so a call to
+ * sdsRemoveFreeSpace may be wise after. */
+void sdssubstr(sds s, size_t start, size_t len) {
+ /* Clamp out of range input */
+ size_t oldlen = sdslen(s);
+ if (start >= oldlen) start = len = 0;
+ if (len > oldlen-start) len = oldlen-start;
+
+ /* Move the data */
+ if (len) memmove(s, s+start, len);
+ s[len] = 0;
+ sdssetlen(s,len);
+}
+
+/* Turn the string into a smaller (or equal) string containing only the
+ * substring specified by the 'start' and 'end' indexes.
+ *
+ * start and end can be negative, where -1 means the last character of the
+ * string, -2 the penultimate character, and so forth.
+ *
+ * The interval is inclusive, so the start and end characters will be part
+ * of the resulting string.
+ *
+ * The string is modified in-place.
+ *
+ * NOTE: this function can be misleading and can have unexpected behaviour,
+ * specifically when you want the length of the new string to be 0.
+ * Having start==end will result in a string with one character.
+ * please consider using sdssubstr instead.
+ *
+ * Example:
+ *
+ * s = sdsnew("Hello World");
+ * sdsrange(s,1,-1); => "ello World"
+ */
+void sdsrange(sds s, ssize_t start, ssize_t end) {
+ size_t newlen, len = sdslen(s);
+ if (len == 0) return;
+ if (start < 0)
+ start = len + start;
+ if (end < 0)
+ end = len + end;
+ newlen = (start > end) ? 0 : (end-start)+1;
+ sdssubstr(s, start, newlen);
+}
+
+/* Apply tolower() to every character of the sds string 's'. */
+void sdstolower(sds s) {
+ size_t len = sdslen(s), j;
+
+ for (j = 0; j < len; j++) s[j] = tolower(s[j]);
+}
+
+/* Apply toupper() to every character of the sds string 's'. */
+void sdstoupper(sds s) {
+ size_t len = sdslen(s), j;
+
+ for (j = 0; j < len; j++) s[j] = toupper(s[j]);
+}
+
+/* Compare two sds strings s1 and s2 with memcmp().
+ *
+ * Return value:
+ *
+ * positive if s1 > s2.
+ * negative if s1 < s2.
+ * 0 if s1 and s2 are exactly the same binary string.
+ *
+ * If two strings share exactly the same prefix, but one of the two has
+ * additional characters, the longer string is considered to be greater than
+ * the smaller one. */
+int sdscmp(const sds s1, const sds s2) {
+ size_t l1, l2, minlen;
+ int cmp;
+
+ l1 = sdslen(s1);
+ l2 = sdslen(s2);
+ minlen = (l1 < l2) ? l1 : l2;
+ cmp = memcmp(s1,s2,minlen);
+ if (cmp == 0) return l1>l2? 1: (l1<l2? -1: 0);
+ return cmp;
+}
+
+/* Split 's' with separator in 'sep'. An array
+ * of sds strings is returned. *count will be set
+ * by reference to the number of tokens returned.
+ *
+ * On out of memory, zero length string, zero length
+ * separator, NULL is returned.
+ *
+ * Note that 'sep' is able to split a string using
+ * a multi-character separator. For example
+ * sdssplit("foo_-_bar","_-_"); will return two
+ * elements "foo" and "bar".
+ *
+ * This version of the function is binary-safe but
+ * requires length arguments. sdssplit() is just the
+ * same function but for zero-terminated strings.
+ */
+sds *sdssplitlen(const char *s, ssize_t len, const char *sep, int seplen, int *count) {
+ int elements = 0, slots = 5;
+ long start = 0, j;
+ sds *tokens;
+
+ if (seplen < 1 || len <= 0) {
+ *count = 0;
+ return NULL;
+ }
+ tokens = s_malloc(sizeof(sds)*slots);
+ if (tokens == NULL) return NULL;
+
+ for (j = 0; j < (len-(seplen-1)); j++) {
+ /* make sure there is room for the next element and the final one */
+ if (slots < elements+2) {
+ sds *newtokens;
+
+ slots *= 2;
+ newtokens = s_realloc(tokens,sizeof(sds)*slots);
+ if (newtokens == NULL) goto cleanup;
+ tokens = newtokens;
+ }
+ /* search the separator */
+ if ((seplen == 1 && *(s+j) == sep[0]) || (memcmp(s+j,sep,seplen) == 0)) {
+ tokens[elements] = sdsnewlen(s+start,j-start);
+ if (tokens[elements] == NULL) goto cleanup;
+ elements++;
+ start = j+seplen;
+ j = j+seplen-1; /* skip the separator */
+ }
+ }
+ /* Add the final element. We are sure there is room in the tokens array. */
+ tokens[elements] = sdsnewlen(s+start,len-start);
+ if (tokens[elements] == NULL) goto cleanup;
+ elements++;
+ *count = elements;
+ return tokens;
+
+cleanup:
+ {
+ int i;
+ for (i = 0; i < elements; i++) sdsfree(tokens[i]);
+ s_free(tokens);
+ *count = 0;
+ return NULL;
+ }
+}
+
+/* Free the result returned by sdssplitlen(), or do nothing if 'tokens' is NULL. */
+void sdsfreesplitres(sds *tokens, int count) {
+ if (!tokens) return;
+ while(count--)
+ sdsfree(tokens[count]);
+ s_free(tokens);
+}
+
+/* Append to the sds string "s" an escaped string representation where
+ * all the non-printable characters (tested with isprint()) are turned into
+ * escapes in the form "\n\r\a...." or "\x<hex-number>".
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscatrepr(sds s, const char *p, size_t len) {
+ s = sdsMakeRoomFor(s, len + 2);
+ s = sdscatlen(s,"\"",1);
+ while(len--) {
+ switch(*p) {
+ case '\\':
+ case '"':
+ s = sdscatprintf(s,"\\%c",*p);
+ break;
+ case '\n': s = sdscatlen(s,"\\n",2); break;
+ case '\r': s = sdscatlen(s,"\\r",2); break;
+ case '\t': s = sdscatlen(s,"\\t",2); break;
+ case '\a': s = sdscatlen(s,"\\a",2); break;
+ case '\b': s = sdscatlen(s,"\\b",2); break;
+ default:
+ if (isprint(*p))
+ s = sdscatlen(s, p, 1);
+ else
+ s = sdscatprintf(s,"\\x%02x",(unsigned char)*p);
+ break;
+ }
+ p++;
+ }
+ return sdscatlen(s,"\"",1);
+}
+
+/* Returns one if the string contains characters to be escaped
+ * by sdscatrepr(), zero otherwise.
+ *
+ * Typically, this should be used to help protect aggregated strings in a way
+ * that is compatible with sdssplitargs(). For this reason, also spaces will be
+ * treated as needing an escape.
+ */
+int sdsneedsrepr(const sds s) {
+ size_t len = sdslen(s);
+ const char *p = s;
+
+ while (len--) {
+ if (*p == '\\' || *p == '"' || *p == '\n' || *p == '\r' ||
+ *p == '\t' || *p == '\a' || *p == '\b' || !isprint(*p) || isspace(*p)) return 1;
+ p++;
+ }
+
+ return 0;
+}
+
+/* Helper function for sdssplitargs() that returns non zero if 'c'
+ * is a valid hex digit. */
+int is_hex_digit(char c) {
+ return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
+ (c >= 'A' && c <= 'F');
+}
+
+/* Helper function for sdssplitargs() that converts a hex digit into an
+ * integer from 0 to 15 */
+int hex_digit_to_int(char c) {
+ switch(c) {
+ case '0': return 0;
+ case '1': return 1;
+ case '2': return 2;
+ case '3': return 3;
+ case '4': return 4;
+ case '5': return 5;
+ case '6': return 6;
+ case '7': return 7;
+ case '8': return 8;
+ case '9': return 9;
+ case 'a': case 'A': return 10;
+ case 'b': case 'B': return 11;
+ case 'c': case 'C': return 12;
+ case 'd': case 'D': return 13;
+ case 'e': case 'E': return 14;
+ case 'f': case 'F': return 15;
+ default: return 0;
+ }
+}
+
+/* Split a line into arguments, where every argument can be in the
+ * following programming-language REPL-alike form:
+ *
+ * foo bar "newline are supported\n" and "\xff\x00otherstuff"
+ *
+ * The number of arguments is stored into *argc, and an array
+ * of sds is returned.
+ *
+ * The caller should free the resulting array of sds strings with
+ * sdsfreesplitres().
+ *
+ * Note that sdscatrepr() is able to convert back a string into
+ * a quoted string in the same format sdssplitargs() is able to parse.
+ *
+ * The function returns the allocated tokens on success, even when the
+ * input string is empty, or NULL if the input contains unbalanced
+ * quotes or closed quotes followed by non space characters
+ * as in: "foo"bar or "foo'
+ */
+sds *sdssplitargs(const char *line, int *argc) {
+ const char *p = line;
+ char *current = NULL;
+ char **vector = NULL;
+
+ *argc = 0;
+ while(1) {
+ /* skip blanks */
+ while(*p && isspace(*p)) p++;
+ if (*p) {
+ /* get a token */
+ int inq=0; /* set to 1 if we are in "quotes" */
+ int insq=0; /* set to 1 if we are in 'single quotes' */
+ int done=0;
+
+ if (current == NULL) current = sdsempty();
+ while(!done) {
+ if (inq) {
+ if (*p == '\\' && *(p+1) == 'x' &&
+ is_hex_digit(*(p+2)) &&
+ is_hex_digit(*(p+3)))
+ {
+ unsigned char byte;
+
+ byte = (hex_digit_to_int(*(p+2))*16)+
+ hex_digit_to_int(*(p+3));
+ current = sdscatlen(current,(char*)&byte,1);
+ p += 3;
+ } else if (*p == '\\' && *(p+1)) {
+ char c;
+
+ p++;
+ switch(*p) {
+ case 'n': c = '\n'; break;
+ case 'r': c = '\r'; break;
+ case 't': c = '\t'; break;
+ case 'b': c = '\b'; break;
+ case 'a': c = '\a'; break;
+ default: c = *p; break;
+ }
+ current = sdscatlen(current,&c,1);
+ } else if (*p == '"') {
+ /* closing quote must be followed by a space or
+ * nothing at all. */
+ if (*(p+1) && !isspace(*(p+1))) goto err;
+ done=1;
+ } else if (!*p) {
+ /* unterminated quotes */
+ goto err;
+ } else {
+ current = sdscatlen(current,p,1);
+ }
+ } else if (insq) {
+ if (*p == '\\' && *(p+1) == '\'') {
+ p++;
+ current = sdscatlen(current,"'",1);
+ } else if (*p == '\'') {
+ /* closing quote must be followed by a space or
+ * nothing at all. */
+ if (*(p+1) && !isspace(*(p+1))) goto err;
+ done=1;
+ } else if (!*p) {
+ /* unterminated quotes */
+ goto err;
+ } else {
+ current = sdscatlen(current,p,1);
+ }
+ } else {
+ switch(*p) {
+ case ' ':
+ case '\n':
+ case '\r':
+ case '\t':
+ case '\0':
+ done=1;
+ break;
+ case '"':
+ inq=1;
+ break;
+ case '\'':
+ insq=1;
+ break;
+ default:
+ current = sdscatlen(current,p,1);
+ break;
+ }
+ }
+ if (*p) p++;
+ }
+ /* add the token to the vector */
+ vector = s_realloc(vector,((*argc)+1)*sizeof(char*));
+ vector[*argc] = current;
+ (*argc)++;
+ current = NULL;
+ } else {
+ /* Even on empty input string return something not NULL. */
+ if (vector == NULL) vector = s_malloc(sizeof(void*));
+ return vector;
+ }
+ }
+
+err:
+ while((*argc)--)
+ sdsfree(vector[*argc]);
+ s_free(vector);
+ if (current) sdsfree(current);
+ *argc = 0;
+ return NULL;
+}
+
+/* Modify the string substituting all the occurrences of the set of
+ * characters specified in the 'from' string to the corresponding character
+ * in the 'to' array.
+ *
+ * For instance: sdsmapchars(mystring, "ho", "01", 2)
+ * will have the effect of turning the string "hello" into "0ell1".
+ *
+ * The function returns the sds string pointer, that is always the same
+ * as the input pointer since no resize is needed. */
+sds sdsmapchars(sds s, const char *from, const char *to, size_t setlen) {
+ size_t j, i, l = sdslen(s);
+
+ for (j = 0; j < l; j++) {
+ for (i = 0; i < setlen; i++) {
+ if (s[j] == from[i]) {
+ s[j] = to[i];
+ break;
+ }
+ }
+ }
+ return s;
+}
+
+/* Join an array of C strings using the specified separator (also a C string).
+ * Returns the result as an sds string. */
+sds sdsjoin(char **argv, int argc, char *sep) {
+ sds join = sdsempty();
+ int j;
+
+ for (j = 0; j < argc; j++) {
+ join = sdscat(join, argv[j]);
+ if (j != argc-1) join = sdscat(join,sep);
+ }
+ return join;
+}
+
+/* Like sdsjoin, but joins an array of SDS strings. */
+sds sdsjoinsds(sds *argv, int argc, const char *sep, size_t seplen) {
+ sds join = sdsempty();
+ int j;
+
+ for (j = 0; j < argc; j++) {
+ join = sdscatsds(join, argv[j]);
+ if (j != argc-1) join = sdscatlen(join,sep,seplen);
+ }
+ return join;
+}
+
+/* Wrappers to the allocators used by SDS. Note that SDS will actually
+ * just use the macros defined into sdsalloc.h in order to avoid to pay
+ * the overhead of function calls. Here we define these wrappers only for
+ * the programs SDS is linked to, if they want to touch the SDS internals
+ * even if they use a different allocator. */
+void *sds_malloc(size_t size) { return s_malloc(size); }
+void *sds_realloc(void *ptr, size_t size) { return s_realloc(ptr,size); }
+void sds_free(void *ptr) { s_free(ptr); }
+
+/* Perform expansion of a template string and return the result as a newly
+ * allocated sds.
+ *
+ * Template variables are specified using curly brackets, e.g. {variable}.
+ * An opening bracket can be quoted by repeating it twice.
+ */
+sds sdstemplate(const char *template, sdstemplate_callback_t cb_func, void *cb_arg)
+{
+ sds res = sdsempty();
+ const char *p = template;
+
+ while (*p) {
+ /* Find next variable, copy everything until there */
+ const char *sv = strchr(p, '{');
+ if (!sv) {
+ /* Not found: copy till rest of template and stop */
+ res = sdscat(res, p);
+ break;
+ } else if (sv > p) {
+ /* Found: copy anything up to the beginning of the variable */
+ res = sdscatlen(res, p, sv - p);
+ }
+
+ /* Skip into variable name, handle premature end or quoting */
+ sv++;
+ if (!*sv) goto error; /* Premature end of template */
+ if (*sv == '{') {
+ /* Quoted '{' */
+ p = sv + 1;
+ res = sdscat(res, "{");
+ continue;
+ }
+
+ /* Find end of variable name, handle premature end of template */
+ const char *ev = strchr(sv, '}');
+ if (!ev) goto error;
+
+ /* Pass variable name to callback and obtain value. If callback failed,
+ * abort. */
+ sds varname = sdsnewlen(sv, ev - sv);
+ sds value = cb_func(varname, cb_arg);
+ sdsfree(varname);
+ if (!value) goto error;
+
+ /* Append value to result and continue */
+ res = sdscat(res, value);
+ sdsfree(value);
+ p = ev + 1;
+ }
+
+ return res;
+
+error:
+ sdsfree(res);
+ return NULL;
+}
+
+#ifdef REDIS_TEST
+#include <stdio.h>
+#include <limits.h>
+#include "testhelp.h"
+
+#define UNUSED(x) (void)(x)
+
+static sds sdsTestTemplateCallback(sds varname, void *arg) {
+ UNUSED(arg);
+ static const char *_var1 = "variable1";
+ static const char *_var2 = "variable2";
+
+ if (!strcmp(varname, _var1)) return sdsnew("value1");
+ else if (!strcmp(varname, _var2)) return sdsnew("value2");
+ else return NULL;
+}
+
+int sdsTest(int argc, char **argv, int flags) {
+ UNUSED(argc);
+ UNUSED(argv);
+ UNUSED(flags);
+
+ {
+ sds x = sdsnew("foo"), y;
+
+ test_cond("Create a string and obtain the length",
+ sdslen(x) == 3 && memcmp(x,"foo\0",4) == 0);
+
+ sdsfree(x);
+ x = sdsnewlen("foo",2);
+ test_cond("Create a string with specified length",
+ sdslen(x) == 2 && memcmp(x,"fo\0",3) == 0);
+
+ x = sdscat(x,"bar");
+ test_cond("Strings concatenation",
+ sdslen(x) == 5 && memcmp(x,"fobar\0",6) == 0);
+
+ x = sdscpy(x,"a");
+ test_cond("sdscpy() against an originally longer string",
+ sdslen(x) == 1 && memcmp(x,"a\0",2) == 0);
+
+ x = sdscpy(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk");
+ test_cond("sdscpy() against an originally shorter string",
+ sdslen(x) == 33 &&
+ memcmp(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk\0",33) == 0);
+
+ sdsfree(x);
+ x = sdscatprintf(sdsempty(),"%d",123);
+ test_cond("sdscatprintf() seems working in the base case",
+ sdslen(x) == 3 && memcmp(x,"123\0",4) == 0);
+
+ sdsfree(x);
+ x = sdscatprintf(sdsempty(),"a%cb",0);
+ test_cond("sdscatprintf() seems working with \\0 inside of result",
+ sdslen(x) == 3 && memcmp(x,"a\0""b\0",4) == 0);
+
+ {
+ sdsfree(x);
+ char etalon[1024*1024];
+ for (size_t i = 0; i < sizeof(etalon); i++) {
+ etalon[i] = '0';
+ }
+ x = sdscatprintf(sdsempty(),"%0*d",(int)sizeof(etalon),0);
+ test_cond("sdscatprintf() can print 1MB",
+ sdslen(x) == sizeof(etalon) && memcmp(x,etalon,sizeof(etalon)) == 0);
+ }
+
+ sdsfree(x);
+ x = sdsnew("--");
+ x = sdscatfmt(x, "Hello %s World %I,%I--", "Hi!", LLONG_MIN,LLONG_MAX);
+ test_cond("sdscatfmt() seems working in the base case",
+ sdslen(x) == 60 &&
+ memcmp(x,"--Hello Hi! World -9223372036854775808,"
+ "9223372036854775807--",60) == 0);
+ printf("[%s]\n",x);
+
+ sdsfree(x);
+ x = sdsnew("--");
+ x = sdscatfmt(x, "%u,%U--", UINT_MAX, ULLONG_MAX);
+ test_cond("sdscatfmt() seems working with unsigned numbers",
+ sdslen(x) == 35 &&
+ memcmp(x,"--4294967295,18446744073709551615--",35) == 0);
+
+ sdsfree(x);
+ x = sdsnew(" x ");
+ sdstrim(x," x");
+ test_cond("sdstrim() works when all chars match",
+ sdslen(x) == 0);
+
+ sdsfree(x);
+ x = sdsnew(" x ");
+ sdstrim(x," ");
+ test_cond("sdstrim() works when a single char remains",
+ sdslen(x) == 1 && x[0] == 'x');
+
+ sdsfree(x);
+ x = sdsnew("xxciaoyyy");
+ sdstrim(x,"xy");
+ test_cond("sdstrim() correctly trims characters",
+ sdslen(x) == 4 && memcmp(x,"ciao\0",5) == 0);
+
+ y = sdsdup(x);
+ sdsrange(y,1,1);
+ test_cond("sdsrange(...,1,1)",
+ sdslen(y) == 1 && memcmp(y,"i\0",2) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,1,-1);
+ test_cond("sdsrange(...,1,-1)",
+ sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,-2,-1);
+ test_cond("sdsrange(...,-2,-1)",
+ sdslen(y) == 2 && memcmp(y,"ao\0",3) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,2,1);
+ test_cond("sdsrange(...,2,1)",
+ sdslen(y) == 0 && memcmp(y,"\0",1) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,1,100);
+ test_cond("sdsrange(...,1,100)",
+ sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,100,100);
+ test_cond("sdsrange(...,100,100)",
+ sdslen(y) == 0 && memcmp(y,"\0",1) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,4,6);
+ test_cond("sdsrange(...,4,6)",
+ sdslen(y) == 0 && memcmp(y,"\0",1) == 0);
+
+ sdsfree(y);
+ y = sdsdup(x);
+ sdsrange(y,3,6);
+ test_cond("sdsrange(...,3,6)",
+ sdslen(y) == 1 && memcmp(y,"o\0",2) == 0);
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("foo");
+ y = sdsnew("foa");
+ test_cond("sdscmp(foo,foa)", sdscmp(x,y) > 0);
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("bar");
+ y = sdsnew("bar");
+ test_cond("sdscmp(bar,bar)", sdscmp(x,y) == 0);
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("aar");
+ y = sdsnew("bar");
+ test_cond("sdscmp(bar,bar)", sdscmp(x,y) < 0);
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnewlen("\a\n\0foo\r",7);
+ y = sdscatrepr(sdsempty(),x,sdslen(x));
+ test_cond("sdscatrepr(...data...)",
+ memcmp(y,"\"\\a\\n\\x00foo\\r\"",15) == 0);
+
+ {
+ unsigned int oldfree;
+ char *p;
+ int i;
+ size_t step = 10, j;
+
+ sdsfree(x);
+ sdsfree(y);
+ x = sdsnew("0");
+ test_cond("sdsnew() free/len buffers", sdslen(x) == 1 && sdsavail(x) == 0);
+
+ /* Run the test a few times in order to hit the first two
+ * SDS header types. */
+ for (i = 0; i < 10; i++) {
+ size_t oldlen = sdslen(x);
+ x = sdsMakeRoomFor(x,step);
+ int type = x[-1]&SDS_TYPE_MASK;
+
+ test_cond("sdsMakeRoomFor() len", sdslen(x) == oldlen);
+ if (type != SDS_TYPE_5) {
+ test_cond("sdsMakeRoomFor() free", sdsavail(x) >= step);
+ oldfree = sdsavail(x);
+ UNUSED(oldfree);
+ }
+ p = x+oldlen;
+ for (j = 0; j < step; j++) {
+ p[j] = 'A'+j;
+ }
+ sdsIncrLen(x,step);
+ }
+ test_cond("sdsMakeRoomFor() content",
+ memcmp("0ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJ",x,101) == 0);
+ test_cond("sdsMakeRoomFor() final length",sdslen(x)==101);
+
+ sdsfree(x);
+ }
+
+ /* Simple template */
+ x = sdstemplate("v1={variable1} v2={variable2}", sdsTestTemplateCallback, NULL);
+ test_cond("sdstemplate() normal flow",
+ memcmp(x,"v1=value1 v2=value2",19) == 0);
+ sdsfree(x);
+
+ /* Template with callback error */
+ x = sdstemplate("v1={variable1} v3={doesnotexist}", sdsTestTemplateCallback, NULL);
+ test_cond("sdstemplate() with callback error", x == NULL);
+
+ /* Template with empty var name */
+ x = sdstemplate("v1={", sdsTestTemplateCallback, NULL);
+ test_cond("sdstemplate() with empty var name", x == NULL);
+
+ /* Template with truncated var name */
+ x = sdstemplate("v1={start", sdsTestTemplateCallback, NULL);
+ test_cond("sdstemplate() with truncated var name", x == NULL);
+
+ /* Template with quoting */
+ x = sdstemplate("v1={{{variable1}} {{} v2={variable2}", sdsTestTemplateCallback, NULL);
+ test_cond("sdstemplate() with quoting",
+ memcmp(x,"v1={value1} {} v2=value2",24) == 0);
+ sdsfree(x);
+
+ /* Test sdsresize - extend */
+ x = sdsnew("1234567890123456789012345678901234567890");
+ x = sdsResize(x, 200, 1);
+ test_cond("sdsrezie() expand len", sdslen(x) == 40);
+ test_cond("sdsrezie() expand strlen", strlen(x) == 40);
+ test_cond("sdsrezie() expand alloc", sdsalloc(x) == 200);
+ /* Test sdsresize - trim free space */
+ x = sdsResize(x, 80, 1);
+ test_cond("sdsrezie() shrink len", sdslen(x) == 40);
+ test_cond("sdsrezie() shrink strlen", strlen(x) == 40);
+ test_cond("sdsrezie() shrink alloc", sdsalloc(x) == 80);
+ /* Test sdsresize - crop used space */
+ x = sdsResize(x, 30, 1);
+ test_cond("sdsrezie() crop len", sdslen(x) == 30);
+ test_cond("sdsrezie() crop strlen", strlen(x) == 30);
+ test_cond("sdsrezie() crop alloc", sdsalloc(x) == 30);
+ /* Test sdsresize - extend to different class */
+ x = sdsResize(x, 400, 1);
+ test_cond("sdsrezie() expand len", sdslen(x) == 30);
+ test_cond("sdsrezie() expand strlen", strlen(x) == 30);
+ test_cond("sdsrezie() expand alloc", sdsalloc(x) == 400);
+ /* Test sdsresize - shrink to different class */
+ x = sdsResize(x, 4, 1);
+ test_cond("sdsrezie() crop len", sdslen(x) == 4);
+ test_cond("sdsrezie() crop strlen", strlen(x) == 4);
+ test_cond("sdsrezie() crop alloc", sdsalloc(x) == 4);
+ sdsfree(x);
+ }
+ return 0;
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 07:30:28 +0000