From bb12c1fd00eb51118749bbbc69c5596835fcbd3b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 19:31:02 +0200 Subject: Adding upstream version 5:7.0.15. Signed-off-by: Daniel Baumann --- deps/hiredis/sds.c | 1289 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1289 insertions(+) create mode 100644 deps/hiredis/sds.c (limited to 'deps/hiredis/sds.c') diff --git a/deps/hiredis/sds.c b/deps/hiredis/sds.c new file mode 100644 index 0000000..114fa49 --- /dev/null +++ b/deps/hiredis/sds.c @@ -0,0 +1,1289 @@ +/* SDSLib 2.0 -- A C dynamic strings library + * + * Copyright (c) 2006-2015, Salvatore Sanfilippo + * 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 "fmacros.h" +#include +#include +#include +#include +#include +#include +#include "sds.h" +#include "sdsalloc.h" + +static inline int hi_sdsHdrSize(char type) { + switch(type&HI_SDS_TYPE_MASK) { + case HI_SDS_TYPE_5: + return sizeof(struct hisdshdr5); + case HI_SDS_TYPE_8: + return sizeof(struct hisdshdr8); + case HI_SDS_TYPE_16: + return sizeof(struct hisdshdr16); + case HI_SDS_TYPE_32: + return sizeof(struct hisdshdr32); + case HI_SDS_TYPE_64: + return sizeof(struct hisdshdr64); + } + return 0; +} + +static inline char hi_sdsReqType(size_t string_size) { + if (string_size < 32) + return HI_SDS_TYPE_5; + if (string_size < 0xff) + return HI_SDS_TYPE_8; + if (string_size < 0xffff) + return HI_SDS_TYPE_16; + if (string_size < 0xffffffff) + return HI_SDS_TYPE_32; + return HI_SDS_TYPE_64; +} + +/* Create a new hisds string with the content specified by the 'init' pointer + * and 'initlen'. + * If NULL is used for 'init' the string is initialized with zero bytes. + * + * The string is always null-terminated (all the hisds strings are, always) so + * even if you create an hisds string with: + * + * mystring = hi_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 hisds header. */ +hisds hi_sdsnewlen(const void *init, size_t initlen) { + void *sh; + hisds s; + char type = hi_sdsReqType(initlen); + /* Empty strings are usually created in order to append. Use type 8 + * since type 5 is not good at this. */ + if (type == HI_SDS_TYPE_5 && initlen == 0) type = HI_SDS_TYPE_8; + int hdrlen = hi_sdsHdrSize(type); + unsigned char *fp; /* flags pointer. */ + + sh = hi_s_malloc(hdrlen+initlen+1); + if (sh == NULL) return NULL; + if (!init) + memset(sh, 0, hdrlen+initlen+1); + s = (char*)sh+hdrlen; + fp = ((unsigned char*)s)-1; + switch(type) { + case HI_SDS_TYPE_5: { + *fp = type | (initlen << HI_SDS_TYPE_BITS); + break; + } + case HI_SDS_TYPE_8: { + HI_SDS_HDR_VAR(8,s); + sh->len = initlen; + sh->alloc = initlen; + *fp = type; + break; + } + case HI_SDS_TYPE_16: { + HI_SDS_HDR_VAR(16,s); + sh->len = initlen; + sh->alloc = initlen; + *fp = type; + break; + } + case HI_SDS_TYPE_32: { + HI_SDS_HDR_VAR(32,s); + sh->len = initlen; + sh->alloc = initlen; + *fp = type; + break; + } + case HI_SDS_TYPE_64: { + HI_SDS_HDR_VAR(64,s); + sh->len = initlen; + sh->alloc = initlen; + *fp = type; + break; + } + } + if (initlen && init) + memcpy(s, init, initlen); + s[initlen] = '\0'; + return s; +} + +/* Create an empty (zero length) hisds string. Even in this case the string + * always has an implicit null term. */ +hisds hi_sdsempty(void) { + return hi_sdsnewlen("",0); +} + +/* Create a new hisds string starting from a null terminated C string. */ +hisds hi_sdsnew(const char *init) { + size_t initlen = (init == NULL) ? 0 : strlen(init); + return hi_sdsnewlen(init, initlen); +} + +/* Duplicate an hisds string. */ +hisds hi_sdsdup(const hisds s) { + return hi_sdsnewlen(s, hi_sdslen(s)); +} + +/* Free an hisds string. No operation is performed if 's' is NULL. */ +void hi_sdsfree(hisds s) { + if (s == NULL) return; + hi_s_free((char*)s-hi_sdsHdrSize(s[-1])); +} + +/* Set the hisds 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 hisds string is hacked manually in some + * way, like in the following example: + * + * s = hi_sdsnew("foobar"); + * s[2] = '\0'; + * hi_sdsupdatelen(s); + * printf("%d\n", hi_sdslen(s)); + * + * The output will be "2", but if we comment out the call to hi_sdsupdatelen() + * the output will be "6" as the string was modified but the logical length + * remains 6 bytes. */ +void hi_sdsupdatelen(hisds s) { + int reallen = strlen(s); + hi_sdssetlen(s, reallen); +} + +/* Modify an hisds 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 hi_sdsclear(hisds s) { + hi_sdssetlen(s, 0); + s[0] = '\0'; +} + +/* Enlarge the free space at the end of the hisds 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. + * + * Note: this does not change the *length* of the hisds string as returned + * by hi_sdslen(), but only the free buffer space we have. */ +hisds hi_sdsMakeRoomFor(hisds s, size_t addlen) { + void *sh, *newsh; + size_t avail = hi_sdsavail(s); + size_t len, newlen; + char type, oldtype = s[-1] & HI_SDS_TYPE_MASK; + int hdrlen; + + /* Return ASAP if there is enough space left. */ + if (avail >= addlen) return s; + + len = hi_sdslen(s); + sh = (char*)s-hi_sdsHdrSize(oldtype); + newlen = (len+addlen); + if (newlen < HI_SDS_MAX_PREALLOC) + newlen *= 2; + else + newlen += HI_SDS_MAX_PREALLOC; + + type = hi_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 hi_sdsMakeRoomFor() must be called + * at every appending operation. */ + if (type == HI_SDS_TYPE_5) type = HI_SDS_TYPE_8; + + hdrlen = hi_sdsHdrSize(type); + if (oldtype==type) { + newsh = hi_s_realloc(sh, hdrlen+newlen+1); + 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 = hi_s_malloc(hdrlen+newlen+1); + if (newsh == NULL) return NULL; + memcpy((char*)newsh+hdrlen, s, len+1); + hi_s_free(sh); + s = (char*)newsh+hdrlen; + s[-1] = type; + hi_sdssetlen(s, len); + } + hi_sdssetalloc(s, newlen); + return s; +} + +/* Reallocate the hisds 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 hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. */ +hisds hi_sdsRemoveFreeSpace(hisds s) { + void *sh, *newsh; + char type, oldtype = s[-1] & HI_SDS_TYPE_MASK; + int hdrlen; + size_t len = hi_sdslen(s); + sh = (char*)s-hi_sdsHdrSize(oldtype); + + type = hi_sdsReqType(len); + hdrlen = hi_sdsHdrSize(type); + if (oldtype==type) { + newsh = hi_s_realloc(sh, hdrlen+len+1); + if (newsh == NULL) return NULL; + s = (char*)newsh+hdrlen; + } else { + newsh = hi_s_malloc(hdrlen+len+1); + if (newsh == NULL) return NULL; + memcpy((char*)newsh+hdrlen, s, len+1); + hi_s_free(sh); + s = (char*)newsh+hdrlen; + s[-1] = type; + hi_sdssetlen(s, len); + } + hi_sdssetalloc(s, len); + return s; +} + +/* Return the total size of the allocation of the specifed hisds string, + * including: + * 1) The hisds header before the pointer. + * 2) The string. + * 3) The free buffer at the end if any. + * 4) The implicit null term. + */ +size_t hi_sdsAllocSize(hisds s) { + size_t alloc = hi_sdsalloc(s); + return hi_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 *hi_sdsAllocPtr(hisds s) { + return (void*) (s-hi_sdsHdrSize(s[-1])); +} + +/* Increment the hisds 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 hi_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 hi_sdsIncrLen() and hi_sdsMakeRoomFor() it is possible to mount the + * following schema, to cat bytes coming from the kernel to the end of an + * hisds string without copying into an intermediate buffer: + * + * oldlen = hi_hi_sdslen(s); + * s = hi_sdsMakeRoomFor(s, BUFFER_SIZE); + * nread = read(fd, s+oldlen, BUFFER_SIZE); + * ... check for nread <= 0 and handle it ... + * hi_sdsIncrLen(s, nread); + */ +void hi_sdsIncrLen(hisds s, int incr) { + unsigned char flags = s[-1]; + size_t len; + switch(flags&HI_SDS_TYPE_MASK) { + case HI_SDS_TYPE_5: { + unsigned char *fp = ((unsigned char*)s)-1; + unsigned char oldlen = HI_SDS_TYPE_5_LEN(flags); + assert((incr > 0 && oldlen+incr < 32) || (incr < 0 && oldlen >= (unsigned int)(-incr))); + *fp = HI_SDS_TYPE_5 | ((oldlen+incr) << HI_SDS_TYPE_BITS); + len = oldlen+incr; + break; + } + case HI_SDS_TYPE_8: { + HI_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 HI_SDS_TYPE_16: { + HI_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 HI_SDS_TYPE_32: { + HI_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 HI_SDS_TYPE_64: { + HI_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 hisds to have the specified length. Bytes that were not part of + * the original length of the hisds will be set to zero. + * + * if the specified length is smaller than the current length, no operation + * is performed. */ +hisds hi_sdsgrowzero(hisds s, size_t len) { + size_t curlen = hi_sdslen(s); + + if (len <= curlen) return s; + s = hi_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 */ + hi_sdssetlen(s, len); + return s; +} + +/* Append the specified binary-safe string pointed by 't' of 'len' bytes to the + * end of the specified hisds string 's'. + * + * After the call, the passed hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. */ +hisds hi_sdscatlen(hisds s, const void *t, size_t len) { + size_t curlen = hi_sdslen(s); + + s = hi_sdsMakeRoomFor(s,len); + if (s == NULL) return NULL; + memcpy(s+curlen, t, len); + hi_sdssetlen(s, curlen+len); + s[curlen+len] = '\0'; + return s; +} + +/* Append the specified null termianted C string to the hisds string 's'. + * + * After the call, the passed hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. */ +hisds hi_sdscat(hisds s, const char *t) { + return hi_sdscatlen(s, t, strlen(t)); +} + +/* Append the specified hisds 't' to the existing hisds 's'. + * + * After the call, the modified hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. */ +hisds hi_sdscatsds(hisds s, const hisds t) { + return hi_sdscatlen(s, t, hi_sdslen(t)); +} + +/* Destructively modify the hisds string 's' to hold the specified binary + * safe string pointed by 't' of length 'len' bytes. */ +hisds hi_sdscpylen(hisds s, const char *t, size_t len) { + if (hi_sdsalloc(s) < len) { + s = hi_sdsMakeRoomFor(s,len-hi_sdslen(s)); + if (s == NULL) return NULL; + } + memcpy(s, t, len); + s[len] = '\0'; + hi_sdssetlen(s, len); + return s; +} + +/* Like hi_sdscpylen() but 't' must be a null-terminated string so that the length + * of the string is obtained with strlen(). */ +hisds hi_sdscpy(hisds s, const char *t) { + return hi_sdscpylen(s, t, strlen(t)); +} + +/* Helper for hi_sdscatlonglong() doing the actual number -> string + * conversion. 's' must point to a string with room for at least + * HI_SDS_LLSTR_SIZE bytes. + * + * The function returns the length of the null-terminated string + * representation stored at 's'. */ +#define HI_SDS_LLSTR_SIZE 21 +int hi_sdsll2str(char *s, long long value) { + char *p, aux; + unsigned long long v; + size_t l; + + /* Generate the string representation, this method produces + * an reversed string. */ + v = (value < 0) ? -value : value; + p = s; + do { + *p++ = '0'+(v%10); + v /= 10; + } while(v); + if (value < 0) *p++ = '-'; + + /* Compute length and add null term. */ + l = p-s; + *p = '\0'; + + /* Reverse the string. */ + p--; + while(s < p) { + aux = *s; + *s = *p; + *p = aux; + s++; + p--; + } + return l; +} + +/* Identical hi_sdsll2str(), but for unsigned long long type. */ +int hi_sdsull2str(char *s, unsigned long long v) { + char *p, aux; + size_t l; + + /* Generate the string representation, this method produces + * an reversed string. */ + p = s; + do { + *p++ = '0'+(v%10); + v /= 10; + } while(v); + + /* Compute length and add null term. */ + l = p-s; + *p = '\0'; + + /* Reverse the string. */ + p--; + while(s < p) { + aux = *s; + *s = *p; + *p = aux; + s++; + p--; + } + return l; +} + +/* Create an hisds string from a long long value. It is much faster than: + * + * hi_sdscatprintf(hi_sdsempty(),"%lld\n", value); + */ +hisds hi_sdsfromlonglong(long long value) { + char buf[HI_SDS_LLSTR_SIZE]; + int len = hi_sdsll2str(buf,value); + + return hi_sdsnewlen(buf,len); +} + +/* Like hi_sdscatprintf() but gets va_list instead of being variadic. */ +hisds hi_sdscatvprintf(hisds s, const char *fmt, va_list ap) { + va_list cpy; + char staticbuf[1024], *buf = staticbuf, *t; + size_t buflen = strlen(fmt)*2; + + /* We try to start using a static buffer for speed. + * If not possible we revert to heap allocation. */ + if (buflen > sizeof(staticbuf)) { + buf = hi_s_malloc(buflen); + if (buf == NULL) return NULL; + } else { + buflen = sizeof(staticbuf); + } + + /* Try with buffers two times bigger every time we fail to + * fit the string in the current buffer size. */ + while(1) { + buf[buflen-2] = '\0'; + va_copy(cpy,ap); + vsnprintf(buf, buflen, fmt, cpy); + va_end(cpy); + if (buf[buflen-2] != '\0') { + if (buf != staticbuf) hi_s_free(buf); + buflen *= 2; + buf = hi_s_malloc(buflen); + if (buf == NULL) return NULL; + continue; + } + break; + } + + /* Finally concat the obtained string to the SDS string and return it. */ + t = hi_sdscat(s, buf); + if (buf != staticbuf) hi_s_free(buf); + return t; +} + +/* Append to the hisds string 's' a string obtained using printf-alike format + * specifier. + * + * After the call, the modified hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. + * + * Example: + * + * s = hi_sdsnew("Sum is: "); + * s = hi_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 hi_sdsempty() as the target string: + * + * s = hi_sdscatprintf(hi_sdsempty(), "... your format ...", args); + */ +hisds hi_sdscatprintf(hisds s, const char *fmt, ...) { + va_list ap; + char *t; + va_start(ap, fmt); + t = hi_sdscatvprintf(s,fmt,ap); + va_end(ap); + return t; +} + +/* This function is similar to hi_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 hisds 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. + */ +hisds hi_sdscatfmt(hisds s, char const *fmt, ...) { + const char *f = fmt; + int i; + va_list ap; + + va_start(ap,fmt); + i = hi_sdslen(s); /* 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 (hi_sdsavail(s)==0) { + s = hi_sdsMakeRoomFor(s,1); + if (s == NULL) goto fmt_error; + } + + switch(*f) { + case '%': + next = *(f+1); + f++; + switch(next) { + case 's': + case 'S': + str = va_arg(ap,char*); + l = (next == 's') ? strlen(str) : hi_sdslen(str); + if (hi_sdsavail(s) < l) { + s = hi_sdsMakeRoomFor(s,l); + if (s == NULL) goto fmt_error; + } + memcpy(s+i,str,l); + hi_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[HI_SDS_LLSTR_SIZE]; + l = hi_sdsll2str(buf,num); + if (hi_sdsavail(s) < l) { + s = hi_sdsMakeRoomFor(s,l); + if (s == NULL) goto fmt_error; + } + memcpy(s+i,buf,l); + hi_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[HI_SDS_LLSTR_SIZE]; + l = hi_sdsull2str(buf,unum); + if (hi_sdsavail(s) < l) { + s = hi_sdsMakeRoomFor(s,l); + if (s == NULL) goto fmt_error; + } + memcpy(s+i,buf,l); + hi_sdsinclen(s,l); + i += l; + } + break; + default: /* Handle %% and generally %. */ + s[i++] = next; + hi_sdsinclen(s,1); + break; + } + break; + default: + s[i++] = *f; + hi_sdsinclen(s,1); + break; + } + f++; + } + va_end(ap); + + /* Add null-term */ + s[i] = '\0'; + return s; + +fmt_error: + va_end(ap); + return NULL; +} + +/* Remove the part of the string from left and from right composed just of + * contiguous characters found in 'cset', that is a null terminted C string. + * + * After the call, the modified hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. + * + * Example: + * + * s = hi_sdsnew("AA...AA.a.aa.aHelloWorld :::"); + * s = hi_sdstrim(s,"Aa. :"); + * printf("%s\n", s); + * + * Output will be just "Hello World". + */ +hisds hi_sdstrim(hisds s, const char *cset) { + char *start, *end, *sp, *ep; + size_t len; + + sp = start = s; + ep = end = s+hi_sdslen(s)-1; + while(sp <= end && strchr(cset, *sp)) sp++; + while(ep > sp && strchr(cset, *ep)) ep--; + len = (sp > ep) ? 0 : ((ep-sp)+1); + if (s != sp) memmove(s, sp, len); + s[len] = '\0'; + hi_sdssetlen(s,len); + return s; +} + +/* 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. + * + * Return value: + * -1 (error) if hi_sdslen(s) is larger than maximum positive ssize_t value. + * 0 on success. + * + * Example: + * + * s = hi_sdsnew("Hello World"); + * hi_sdsrange(s,1,-1); => "ello World" + */ +int hi_sdsrange(hisds s, ssize_t start, ssize_t end) { + size_t newlen, len = hi_sdslen(s); + if (len > SSIZE_MAX) return -1; + + if (len == 0) return 0; + if (start < 0) { + start = len+start; + if (start < 0) start = 0; + } + if (end < 0) { + end = len+end; + if (end < 0) end = 0; + } + newlen = (start > end) ? 0 : (end-start)+1; + if (newlen != 0) { + if (start >= (ssize_t)len) { + newlen = 0; + } else if (end >= (ssize_t)len) { + end = len-1; + newlen = (start > end) ? 0 : (end-start)+1; + } + } else { + start = 0; + } + if (start && newlen) memmove(s, s+start, newlen); + s[newlen] = 0; + hi_sdssetlen(s,newlen); + return 0; +} + +/* Apply tolower() to every character of the hisds string 's'. */ +void hi_sdstolower(hisds s) { + int len = hi_sdslen(s), j; + + for (j = 0; j < len; j++) s[j] = tolower(s[j]); +} + +/* Apply toupper() to every character of the hisds string 's'. */ +void hi_sdstoupper(hisds s) { + int len = hi_sdslen(s), j; + + for (j = 0; j < len; j++) s[j] = toupper(s[j]); +} + +/* Compare two hisds 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 hi_sdscmp(const hisds s1, const hisds s2) { + size_t l1, l2, minlen; + int cmp; + + l1 = hi_sdslen(s1); + l2 = hi_sdslen(s2); + minlen = (l1 < l2) ? l1 : l2; + cmp = memcmp(s1,s2,minlen); + if (cmp == 0) return l1-l2; + return cmp; +} + +/* Split 's' with separator in 'sep'. An array + * of hisds 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 + * hi_sdssplit("foo_-_bar","_-_"); will return two + * elements "foo" and "bar". + * + * This version of the function is binary-safe but + * requires length arguments. hi_sdssplit() is just the + * same function but for zero-terminated strings. + */ +hisds *hi_sdssplitlen(const char *s, int len, const char *sep, int seplen, int *count) { + int elements = 0, slots = 5, start = 0, j; + hisds *tokens; + + if (seplen < 1 || len < 0) return NULL; + + tokens = hi_s_malloc(sizeof(hisds)*slots); + if (tokens == NULL) return NULL; + + if (len == 0) { + *count = 0; + return tokens; + } + 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) { + hisds *newtokens; + + slots *= 2; + newtokens = hi_s_realloc(tokens,sizeof(hisds)*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] = hi_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] = hi_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++) hi_sdsfree(tokens[i]); + hi_s_free(tokens); + *count = 0; + return NULL; + } +} + +/* Free the result returned by hi_sdssplitlen(), or do nothing if 'tokens' is NULL. */ +void hi_sdsfreesplitres(hisds *tokens, int count) { + if (!tokens) return; + while(count--) + hi_sdsfree(tokens[count]); + hi_s_free(tokens); +} + +/* Append to the hisds 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". + * + * After the call, the modified hisds string is no longer valid and all the + * references must be substituted with the new pointer returned by the call. */ +hisds hi_sdscatrepr(hisds s, const char *p, size_t len) { + s = hi_sdscatlen(s,"\"",1); + while(len--) { + switch(*p) { + case '\\': + case '"': + s = hi_sdscatprintf(s,"\\%c",*p); + break; + case '\n': s = hi_sdscatlen(s,"\\n",2); break; + case '\r': s = hi_sdscatlen(s,"\\r",2); break; + case '\t': s = hi_sdscatlen(s,"\\t",2); break; + case '\a': s = hi_sdscatlen(s,"\\a",2); break; + case '\b': s = hi_sdscatlen(s,"\\b",2); break; + default: + if (isprint(*p)) + s = hi_sdscatprintf(s,"%c",*p); + else + s = hi_sdscatprintf(s,"\\x%02x",(unsigned char)*p); + break; + } + p++; + } + return hi_sdscatlen(s,"\"",1); +} + +/* Helper function for hi_sdssplitargs() that converts a hex digit into an + * integer from 0 to 15 */ +static int hi_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 hisds is returned. + * + * The caller should free the resulting array of hisds strings with + * hi_sdsfreesplitres(). + * + * Note that hi_sdscatrepr() is able to convert back a string into + * a quoted string in the same format hi_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' + */ +hisds *hi_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 = hi_sdsempty(); + while(!done) { + if (inq) { + if (*p == '\\' && *(p+1) == 'x' && + isxdigit(*(p+2)) && + isxdigit(*(p+3))) + { + unsigned char byte; + + byte = (hi_hex_digit_to_int(*(p+2))*16)+ + hi_hex_digit_to_int(*(p+3)); + current = hi_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 = hi_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 = hi_sdscatlen(current,p,1); + } + } else if (insq) { + if (*p == '\\' && *(p+1) == '\'') { + p++; + current = hi_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 = hi_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 = hi_sdscatlen(current,p,1); + break; + } + } + if (*p) p++; + } + /* add the token to the vector */ + { + char **new_vector = hi_s_realloc(vector,((*argc)+1)*sizeof(char*)); + if (new_vector == NULL) { + hi_s_free(vector); + return NULL; + } + + vector = new_vector; + vector[*argc] = current; + (*argc)++; + current = NULL; + } + } else { + /* Even on empty input string return something not NULL. */ + if (vector == NULL) vector = hi_s_malloc(sizeof(void*)); + return vector; + } + } + +err: + while((*argc)--) + hi_sdsfree(vector[*argc]); + hi_s_free(vector); + if (current) hi_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: hi_sdsmapchars(mystring, "ho", "01", 2) + * will have the effect of turning the string "hello" into "0ell1". + * + * The function returns the hisds string pointer, that is always the same + * as the input pointer since no resize is needed. */ +hisds hi_sdsmapchars(hisds s, const char *from, const char *to, size_t setlen) { + size_t j, i, l = hi_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 hisds string. */ +hisds hi_sdsjoin(char **argv, int argc, char *sep) { + hisds join = hi_sdsempty(); + int j; + + for (j = 0; j < argc; j++) { + join = hi_sdscat(join, argv[j]); + if (j != argc-1) join = hi_sdscat(join,sep); + } + return join; +} + +/* Like hi_sdsjoin, but joins an array of SDS strings. */ +hisds hi_sdsjoinsds(hisds *argv, int argc, const char *sep, size_t seplen) { + hisds join = hi_sdsempty(); + int j; + + for (j = 0; j < argc; j++) { + join = hi_sdscatsds(join, argv[j]); + if (j != argc-1) join = hi_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 *hi_sds_malloc(size_t size) { return hi_s_malloc(size); } +void *hi_sds_realloc(void *ptr, size_t size) { return hi_s_realloc(ptr,size); } +void hi_sds_free(void *ptr) { hi_s_free(ptr); } + +#if defined(HI_SDS_TEST_MAIN) +#include +#include "testhelp.h" +#include "limits.h" + +#define UNUSED(x) (void)(x) +int hi_sdsTest(void) { + { + hisds x = hi_sdsnew("foo"), y; + + test_cond("Create a string and obtain the length", + hi_sdslen(x) == 3 && memcmp(x,"foo\0",4) == 0) + + hi_sdsfree(x); + x = hi_sdsnewlen("foo",2); + test_cond("Create a string with specified length", + hi_sdslen(x) == 2 && memcmp(x,"fo\0",3) == 0) + + x = hi_sdscat(x,"bar"); + test_cond("Strings concatenation", + hi_sdslen(x) == 5 && memcmp(x,"fobar\0",6) == 0); + + x = hi_sdscpy(x,"a"); + test_cond("hi_sdscpy() against an originally longer string", + hi_sdslen(x) == 1 && memcmp(x,"a\0",2) == 0) + + x = hi_sdscpy(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk"); + test_cond("hi_sdscpy() against an originally shorter string", + hi_sdslen(x) == 33 && + memcmp(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk\0",33) == 0) + + hi_sdsfree(x); + x = hi_sdscatprintf(hi_sdsempty(),"%d",123); + test_cond("hi_sdscatprintf() seems working in the base case", + hi_sdslen(x) == 3 && memcmp(x,"123\0",4) == 0) + + hi_sdsfree(x); + x = hi_sdsnew("--"); + x = hi_sdscatfmt(x, "Hello %s World %I,%I--", "Hi!", LLONG_MIN,LLONG_MAX); + test_cond("hi_sdscatfmt() seems working in the base case", + hi_sdslen(x) == 60 && + memcmp(x,"--Hello Hi! World -9223372036854775808," + "9223372036854775807--",60) == 0) + printf("[%s]\n",x); + + hi_sdsfree(x); + x = hi_sdsnew("--"); + x = hi_sdscatfmt(x, "%u,%U--", UINT_MAX, ULLONG_MAX); + test_cond("hi_sdscatfmt() seems working with unsigned numbers", + hi_sdslen(x) == 35 && + memcmp(x,"--4294967295,18446744073709551615--",35) == 0) + + hi_sdsfree(x); + x = hi_sdsnew(" x "); + hi_sdstrim(x," x"); + test_cond("hi_sdstrim() works when all chars match", + hi_sdslen(x) == 0) + + hi_sdsfree(x); + x = hi_sdsnew(" x "); + hi_sdstrim(x," "); + test_cond("hi_sdstrim() works when a single char remains", + hi_sdslen(x) == 1 && x[0] == 'x') + + hi_sdsfree(x); + x = hi_sdsnew("xxciaoyyy"); + hi_sdstrim(x,"xy"); + test_cond("hi_sdstrim() correctly trims characters", + hi_sdslen(x) == 4 && memcmp(x,"ciao\0",5) == 0) + + y = hi_sdsdup(x); + hi_sdsrange(y,1,1); + test_cond("hi_sdsrange(...,1,1)", + hi_sdslen(y) == 1 && memcmp(y,"i\0",2) == 0) + + hi_sdsfree(y); + y = hi_sdsdup(x); + hi_sdsrange(y,1,-1); + test_cond("hi_sdsrange(...,1,-1)", + hi_sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0) + + hi_sdsfree(y); + y = hi_sdsdup(x); + hi_sdsrange(y,-2,-1); + test_cond("hi_sdsrange(...,-2,-1)", + hi_sdslen(y) == 2 && memcmp(y,"ao\0",3) == 0) + + hi_sdsfree(y); + y = hi_sdsdup(x); + hi_sdsrange(y,2,1); + test_cond("hi_sdsrange(...,2,1)", + hi_sdslen(y) == 0 && memcmp(y,"\0",1) == 0) + + hi_sdsfree(y); + y = hi_sdsdup(x); + hi_sdsrange(y,1,100); + test_cond("hi_sdsrange(...,1,100)", + hi_sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0) + + hi_sdsfree(y); + y = hi_sdsdup(x); + hi_sdsrange(y,100,100); + test_cond("hi_sdsrange(...,100,100)", + hi_sdslen(y) == 0 && memcmp(y,"\0",1) == 0) + + hi_sdsfree(y); + hi_sdsfree(x); + x = hi_sdsnew("foo"); + y = hi_sdsnew("foa"); + test_cond("hi_sdscmp(foo,foa)", hi_sdscmp(x,y) > 0) + + hi_sdsfree(y); + hi_sdsfree(x); + x = hi_sdsnew("bar"); + y = hi_sdsnew("bar"); + test_cond("hi_sdscmp(bar,bar)", hi_sdscmp(x,y) == 0) + + hi_sdsfree(y); + hi_sdsfree(x); + x = hi_sdsnew("aar"); + y = hi_sdsnew("bar"); + test_cond("hi_sdscmp(bar,bar)", hi_sdscmp(x,y) < 0) + + hi_sdsfree(y); + hi_sdsfree(x); + x = hi_sdsnewlen("\a\n\0foo\r",7); + y = hi_sdscatrepr(hi_sdsempty(),x,hi_sdslen(x)); + test_cond("hi_sdscatrepr(...data...)", + memcmp(y,"\"\\a\\n\\x00foo\\r\"",15) == 0) + + { + unsigned int oldfree; + char *p; + int step = 10, j, i; + + hi_sdsfree(x); + hi_sdsfree(y); + x = hi_sdsnew("0"); + test_cond("hi_sdsnew() free/len buffers", hi_sdslen(x) == 1 && hi_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++) { + int oldlen = hi_sdslen(x); + x = hi_sdsMakeRoomFor(x,step); + int type = x[-1]&HI_SDS_TYPE_MASK; + + test_cond("sdsMakeRoomFor() len", hi_sdslen(x) == oldlen); + if (type != HI_SDS_TYPE_5) { + test_cond("hi_sdsMakeRoomFor() free", hi_sdsavail(x) >= step); + oldfree = hi_sdsavail(x); + } + p = x+oldlen; + for (j = 0; j < step; j++) { + p[j] = 'A'+j; + } + hi_sdsIncrLen(x,step); + } + test_cond("hi_sdsMakeRoomFor() content", + memcmp("0ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJ",x,101) == 0); + test_cond("sdsMakeRoomFor() final length",hi_sdslen(x)==101); + + hi_sdsfree(x); + } + } + test_report(); + return 0; +} +#endif + +#ifdef HI_SDS_TEST_MAIN +int main(void) { + return hi_sdsTest(); +} +#endif -- cgit v1.2.3