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-rw-r--r--examples/redis-unstable/src/sds.c1565
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diff --git a/examples/redis-unstable/src/sds.c b/examples/redis-unstable/src/sds.c
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--- a/examples/redis-unstable/src/sds.c
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-/* SDSLib 2.0 -- A C dynamic strings library
- *
- * Copyright (c) 2006-Present, Redis Ltd.
- * All rights reserved.
- *
- * Copyright (c) 2024-present, Valkey contributors.
- * All rights reserved.
- *
- * Licensed under your choice of (a) the Redis Source Available License 2.0
- * (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
- * GNU Affero General Public License v3 (AGPLv3).
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <limits.h>
-#include "redisassert.h"
-#include "sds.h"
-#include "sdsalloc.h"
-#include "util.h"
-
-const char *SDS_NOINIT = "SDS_NOINIT";
-
-/* Returns the minimum SDS type required to store a string of the given length.
- *
- * Previously, the SDS type was determined solely by the logical string
- * length, ignoring header size, which could lead to inconsistencies. If the
- * allocated buffer was larger than the maximum size supported by a type, `alloc`
- * would be truncated, creating a mismatch between `alloc` and the actual buffer size.
- */
-char sdsReqType(size_t string_size) {
- if (string_size < 1 << 5) return SDS_TYPE_5;
- if (string_size <= (1 << 8) - sizeof(struct sdshdr8) - 1) return SDS_TYPE_8;
- if (string_size <= (1 << 16) - sizeof(struct sdshdr16) - 1) return SDS_TYPE_16;
-#if (LONG_MAX == LLONG_MAX)
- if (string_size <= (1ll << 32) - sizeof(struct sdshdr32) - 1) 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 */
-}
-
-/*
- * Adjusts the SDS type if the allocated buffer size exceeds the maximum size
- * addressable by the current type.
- *
- * The SDS type is initially determined based on the logical length of the string.
- * However, allocators like jemalloc may return a buffer larger than requested,
- * potentially exceeding the maximum size the selected SDS type can handle. This
- * can cause a mismatch between the `alloc` field and the actual buffer size,
- * leading to wasted memory and possible inconsistencies.
- *
- * This function ensures that the SDS type is selected based on the actual buffer
- * size rather than just the logical length. If the buffer size supports a larger
- * SDS type, it updates `type` and `hdrlen` accordingly.
- *
- * Returns 1 if the type was adjusted, 0 otherwise.
- */
-static inline int adjustTypeIfNeeded(char *type, int *hdrlen, size_t bufsize) {
- size_t usable = bufsize - *hdrlen - 1;
- if (*type != SDS_TYPE_5 && usable > sdsTypeMaxSize(*type)) {
- *type = sdsReqType(usable);
- *hdrlen = sdsHdrSize(*type);
- return 1;
- }
- return 0;
-}
-
-/* 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;
-
- 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);
- size_t bufsize;
-
- assert(initlen + hdrlen + 1 > initlen); /* Catch size_t overflow */
- sh = trymalloc?
- s_trymalloc_usable(hdrlen+initlen+1, &bufsize) :
- s_malloc_usable(hdrlen+initlen+1, &bufsize);
- if (sh == NULL) return NULL;
-
- adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- return sdsnewplacement(sh, bufsize, type, init, initlen);
-}
-
-/* Initializes an SDS within pre-allocated buffer. Like, placement new in C++.
- *
- * Parameters:
- * - `buf` : A pre-allocated buffer for the SDS.
- * - `bufsize`: Total size of the buffer (>= `sdsReqSize(initlen, type)`). Can use
- * a larger `bufsize` than required, but usable size won't be greater
- * than `sdsTypeMaxSize(type)`.
- * - `type` : The SDS type. Can assist `sdsReqType(length)` to compute the type.
- * - `init` : Initial string to copy, or `SDS_NOINIT` to skip initialization.
- * - `initlen`: Length of the initial string.
- *
- * Returns:
- * - A pointer to the SDS inside `buf`.
- */
-sds sdsnewplacement(char *buf, size_t bufsize, char type, const char *init, size_t initlen) {
- assert(bufsize >= sdsReqSize(initlen, type));
- int hdrlen = sdsHdrSize(type);
- size_t usable = bufsize - hdrlen - 1;
- sds s = buf + hdrlen;
- unsigned char *fp = ((unsigned char *)s) - 1; /* flags pointer. */
-
- 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;
- debugAssert(usable <= sdsTypeMaxSize(type));
- sh->alloc = usable;
- *fp = type;
- break;
- }
- case SDS_TYPE_16: {
- SDS_HDR_VAR(16,s);
- sh->len = initlen;
- debugAssert(usable <= sdsTypeMaxSize(type));
- sh->alloc = usable;
- *fp = type;
- break;
- }
- case SDS_TYPE_32: {
- SDS_HDR_VAR(32,s);
- sh->len = initlen;
- debugAssert(usable <= sdsTypeMaxSize(type));
- sh->alloc = usable;
- *fp = type;
- break;
- }
- case SDS_TYPE_64: {
- SDS_HDR_VAR(64,s);
- sh->len = initlen;
- debugAssert(usable <= sdsTypeMaxSize(type));
- sh->alloc = usable;
- *fp = type;
- break;
- }
- }
- if (init == SDS_NOINIT)
- init = NULL;
- else if (!init)
- memset(s, 0, initlen);
- else if (initlen)
- 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]));
-}
-
-void sdsfreeusable(sds s, size_t *usable) {
- if (s == NULL) return;
- s_free_usable((char*)s-sdsHdrSize(s[-1]), usable);
-}
-
-/* Generic version of sdsfree. */
-void sdsfreegeneric(void *s) {
- sdsfree((sds)s);
-}
-
-/* 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 = sdsType(s);
- int hdrlen;
- size_t bufsize, usable;
- int use_realloc;
-
- /* 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 */
- use_realloc = (oldtype == type);
- if (use_realloc) {
- newsh = s_realloc_usable(sh, hdrlen + newlen + 1, &bufsize, NULL);
- if (newsh == NULL) return NULL;
- s = (char*)newsh + hdrlen;
- if (adjustTypeIfNeeded(&type, &hdrlen, bufsize)) {
- memmove((char *)newsh + hdrlen, s, len + 1);
- s = (char *)newsh + hdrlen;
- s[-1] = type;
- sdssetlen(s, len);
- }
- } else {
- /* Since the header size changes, need to move the string forward,
- * and can't use realloc */
- newsh = s_malloc_usable(hdrlen + newlen + 1, &bufsize);
- if (newsh == NULL) return NULL;
- adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- memcpy((char*)newsh+hdrlen, s, len+1);
- s_free(sh);
- s = (char*)newsh+hdrlen;
- s[-1] = type;
- sdssetlen(s, len);
- }
- usable = bufsize - hdrlen - 1;
- assert(type == SDS_TYPE_5 || 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.
- *
- * 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 = NULL;
- char type, oldtype = sdsType(s);
- 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;
- size_t bufsize = 0;
- size_t newsize;
-
- 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. */
- bufsize = sdsAllocSize(s);
- alloc_already_optimal = (je_nallocx(newlen, 0) == bufsize);
- #endif
- if (!alloc_already_optimal) {
- newsh = s_realloc_usable(sh, newlen, &bufsize, NULL);
- if (newsh == NULL) return NULL;
- s = (char *)newsh + oldhdrlen;
-
- if (adjustTypeIfNeeded(&oldtype, &oldhdrlen, bufsize)) {
- memmove((char *)newsh + oldhdrlen, s, len + 1);
- s = (char *)newsh + oldhdrlen;
- s[-1] = oldtype;
- sdssetlen(s, len);
- }
- }
- newsize = bufsize - oldhdrlen - 1;
- debugAssert(oldtype == SDS_TYPE_5 || newsize <= sdsTypeMaxSize(oldtype));
- } else {
- newsh = s_malloc_usable(newlen, &bufsize);
- if (newsh == NULL) return NULL;
- adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- memcpy((char *)newsh + hdrlen, s, len + 1);
- s_free(sh);
- s = (char *)newsh + hdrlen;
- s[-1] = type;
- newsize = bufsize - hdrlen - 1;
- debugAssert(type == SDS_TYPE_5 || newsize <= sdsTypeMaxSize(type));
- }
- s[len] = 0;
- sdssetlen(s, len);
- sdssetalloc(s, newsize);
- return s;
-}
-
-/* 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) {
- size_t len;
- switch(sdsType(s)) {
- case SDS_TYPE_5: {
- unsigned char *fp = ((unsigned char*)s)-1;
- unsigned char oldlen = SDS_TYPE_5_LEN(s);
- 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 = sdsType(x);
-
- 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("sdsresize() expand len", sdslen(x) == 40);
- test_cond("sdsresize() expand strlen", strlen(x) == 40);
- test_cond("sdsresize() expand alloc", sdsalloc(x) == 200);
- /* Test sdsresize - trim free space */
- x = sdsResize(x, 80, 1);
- test_cond("sdsresize() shrink len", sdslen(x) == 40);
- test_cond("sdsresize() shrink strlen", strlen(x) == 40);
- test_cond("sdsresize() shrink alloc", sdsalloc(x) == 80);
- /* Test sdsresize - crop used space */
- x = sdsResize(x, 30, 1);
- test_cond("sdsresize() crop len", sdslen(x) == 30);
- test_cond("sdsresize() crop strlen", strlen(x) == 30);
- test_cond("sdsresize() crop alloc", sdsalloc(x) == 30);
- /* Test sdsresize - extend to different class */
- x = sdsResize(x, 400, 1);
- test_cond("sdsresize() expand len", sdslen(x) == 30);
- test_cond("sdsresize() expand strlen", strlen(x) == 30);
- test_cond("sdsresize() expand alloc", sdsalloc(x) == 400);
- /* Test sdsresize - shrink to different class */
- x = sdsResize(x, 4, 1);
- test_cond("sdsresize() crop len", sdslen(x) == 4);
- test_cond("sdsresize() crop strlen", strlen(x) == 4);
- test_cond("sdsresize() crop alloc", sdsalloc(x) == 4);
- sdsfree(x);
-
- { /* Test adjustTypeIfNeeded() */
- /* Test case: Type should be adjusted when buffer size exceeds max size for current type */
- char type = SDS_TYPE_8;
- int hdrlen = sdsHdrSize(type);
- size_t bufsize = (1<<8) + hdrlen + 1; /* Exceeds SDS_TYPE_8 max size */
-
- int result = adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- test_cond("adjustTypeIfNeeded() returns 1 when type needs adjustment", result == 1);
- test_cond("adjustTypeIfNeeded() adjusts type correctly", type == SDS_TYPE_16);
- test_cond("adjustTypeIfNeeded() adjusts header length correctly", hdrlen == sdsHdrSize(SDS_TYPE_16));
-
- /* Test case: Type should not be adjusted when buffer size is within max size for current type */
- type = SDS_TYPE_8;
- hdrlen = sdsHdrSize(type);
- bufsize = (1<<8) - 10 + hdrlen + 1; /* Within SDS_TYPE_8 max size */
- result = adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- test_cond("adjustTypeIfNeeded() returns 0 when type doesn't need adjustment", result == 0);
- test_cond("adjustTypeIfNeeded() doesn't change type when not needed", type == SDS_TYPE_8);
- test_cond("adjustTypeIfNeeded() doesn't change header length when not needed", hdrlen == sdsHdrSize(SDS_TYPE_8));
-
- /* Test case 3: Type 5 should never be adjusted */
- type = SDS_TYPE_5;
- hdrlen = sdsHdrSize(type);
- bufsize = 1000; /* Large buffer size */
- result = adjustTypeIfNeeded(&type, &hdrlen, bufsize);
- test_cond("adjustTypeIfNeeded() returns 0 for SDS_TYPE_5", result == 0);
- test_cond("adjustTypeIfNeeded() doesn't change SDS_TYPE_5", type == SDS_TYPE_5);
- test_cond("adjustTypeIfNeeded() doesn't change header length for SDS_TYPE_5", hdrlen == sdsHdrSize(SDS_TYPE_5));
- }
- }
- return 0;
-}
-#endif
generated by cgit v1.2.3 (git 2.46.0) at 2026-04-29 12:44:54 +0000