summaryrefslogtreecommitdiffstats
path: root/deps/hiredis/sds.c
diff options
context:
space:
mode:
Diffstat (limited to 'deps/hiredis/sds.c')
-rw-r--r--deps/hiredis/sds.c1292
1 files changed, 1292 insertions, 0 deletions
diff --git a/deps/hiredis/sds.c b/deps/hiredis/sds.c
new file mode 100644
index 0000000..ac2b483
--- /dev/null
+++ b/deps/hiredis/sds.c
@@ -0,0 +1,1292 @@
+/* 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 23:11:09 +0000