diff options
Diffstat (limited to 'examples/redis-unstable/deps/hiredis/sds.c')
| -rw-r--r-- | examples/redis-unstable/deps/hiredis/sds.c | 1292 |
1 files changed, 0 insertions, 1292 deletions
diff --git a/examples/redis-unstable/deps/hiredis/sds.c b/examples/redis-unstable/deps/hiredis/sds.c deleted file mode 100644 index ac2b483..0000000 --- a/examples/redis-unstable/deps/hiredis/sds.c +++ /dev/null @@ -1,1292 +0,0 @@ -/* 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 "fmacros.h" -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <ctype.h> -#include <assert.h> -#include <limits.h> -#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. */ - - if (hdrlen+initlen+1 <= initlen) return NULL; /* Catch size_t overflow */ - 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) { - size_t 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, reqlen; - 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); - reqlen = newlen = (len+addlen); - if (newlen <= len) return NULL; /* Catch size_t overflow */ - 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 (hdrlen+newlen+1 <= reqlen) return NULL; /* Catch size_t overflow */ - 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; - long 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 %<unknown>. */ - 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 sds string 's'. */ -void hi_sdstolower(hisds s) { - size_t len = hi_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 hi_sdstoupper(hisds s) { - size_t 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<hex-number>". - * - * 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((int) *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((int) *(p+2)) && - isxdigit((int) *(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((int) *(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((int) *(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 <stdio.h> -#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 |