summaryrefslogtreecommitdiff
path: root/examples/redis-unstable/deps/hiredis/read.c
diff options
context:
space:
mode:
authorMitja Felicijan <mitja.felicijan@gmail.com>2026-01-21 22:52:54 +0100
committerMitja Felicijan <mitja.felicijan@gmail.com>2026-01-21 22:52:54 +0100
commitdcacc00e3750300617ba6e16eb346713f91a783a (patch)
tree38e2d4fb5ed9d119711d4295c6eda4b014af73fd /examples/redis-unstable/deps/hiredis/read.c
parent58dac10aeb8f5a041c46bddbeaf4c7966a99b998 (diff)
downloadcrep-dcacc00e3750300617ba6e16eb346713f91a783a.tar.gz
Remove testing data
Diffstat (limited to 'examples/redis-unstable/deps/hiredis/read.c')
-rw-r--r--examples/redis-unstable/deps/hiredis/read.c788
1 files changed, 0 insertions, 788 deletions
diff --git a/examples/redis-unstable/deps/hiredis/read.c b/examples/redis-unstable/deps/hiredis/read.c
deleted file mode 100644
index dd038c5..0000000
--- a/examples/redis-unstable/deps/hiredis/read.c
+++ /dev/null
@@ -1,788 +0,0 @@
-/*
- * Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com>
- * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
- *
- * 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 <string.h>
-#include <stdlib.h>
-#ifndef _MSC_VER
-#include <unistd.h>
-#include <strings.h>
-#endif
-#include <assert.h>
-#include <errno.h>
-#include <ctype.h>
-#include <limits.h>
-#include <math.h>
-
-#include "alloc.h"
-#include "read.h"
-#include "sds.h"
-#include "win32.h"
-
-/* Initial size of our nested reply stack and how much we grow it when needd */
-#define REDIS_READER_STACK_SIZE 9
-
-static void __redisReaderSetError(redisReader *r, int type, const char *str) {
- size_t len;
-
- if (r->reply != NULL && r->fn && r->fn->freeObject) {
- r->fn->freeObject(r->reply);
- r->reply = NULL;
- }
-
- /* Clear input buffer on errors. */
- hi_sdsfree(r->buf);
- r->buf = NULL;
- r->pos = r->len = 0;
-
- /* Reset task stack. */
- r->ridx = -1;
-
- /* Set error. */
- r->err = type;
- len = strlen(str);
- len = len < (sizeof(r->errstr)-1) ? len : (sizeof(r->errstr)-1);
- memcpy(r->errstr,str,len);
- r->errstr[len] = '\0';
-}
-
-static size_t chrtos(char *buf, size_t size, char byte) {
- size_t len = 0;
-
- switch(byte) {
- case '\\':
- case '"':
- len = snprintf(buf,size,"\"\\%c\"",byte);
- break;
- case '\n': len = snprintf(buf,size,"\"\\n\""); break;
- case '\r': len = snprintf(buf,size,"\"\\r\""); break;
- case '\t': len = snprintf(buf,size,"\"\\t\""); break;
- case '\a': len = snprintf(buf,size,"\"\\a\""); break;
- case '\b': len = snprintf(buf,size,"\"\\b\""); break;
- default:
- if (isprint(byte))
- len = snprintf(buf,size,"\"%c\"",byte);
- else
- len = snprintf(buf,size,"\"\\x%02x\"",(unsigned char)byte);
- break;
- }
-
- return len;
-}
-
-static void __redisReaderSetErrorProtocolByte(redisReader *r, char byte) {
- char cbuf[8], sbuf[128];
-
- chrtos(cbuf,sizeof(cbuf),byte);
- snprintf(sbuf,sizeof(sbuf),
- "Protocol error, got %s as reply type byte", cbuf);
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,sbuf);
-}
-
-static void __redisReaderSetErrorOOM(redisReader *r) {
- __redisReaderSetError(r,REDIS_ERR_OOM,"Out of memory");
-}
-
-static char *readBytes(redisReader *r, unsigned int bytes) {
- char *p;
- if (r->len-r->pos >= bytes) {
- p = r->buf+r->pos;
- r->pos += bytes;
- return p;
- }
- return NULL;
-}
-
-/* Find pointer to \r\n. */
-static char *seekNewline(char *s, size_t len) {
- char *ret;
-
- /* We cannot match with fewer than 2 bytes */
- if (len < 2)
- return NULL;
-
- /* Search up to len - 1 characters */
- len--;
-
- /* Look for the \r */
- while ((ret = memchr(s, '\r', len)) != NULL) {
- if (ret[1] == '\n') {
- /* Found. */
- break;
- }
- /* Continue searching. */
- ret++;
- len -= ret - s;
- s = ret;
- }
-
- return ret;
-}
-
-/* Convert a string into a long long. Returns REDIS_OK if the string could be
- * parsed into a (non-overflowing) long long, REDIS_ERR otherwise. The value
- * will be set to the parsed value when appropriate.
- *
- * Note that this function demands that the string strictly represents
- * a long long: no spaces or other characters before or after the string
- * representing the number are accepted, nor zeroes at the start if not
- * for the string "0" representing the zero number.
- *
- * Because of its strictness, it is safe to use this function to check if
- * you can convert a string into a long long, and obtain back the string
- * from the number without any loss in the string representation. */
-static int string2ll(const char *s, size_t slen, long long *value) {
- const char *p = s;
- size_t plen = 0;
- int negative = 0;
- unsigned long long v;
-
- if (plen == slen)
- return REDIS_ERR;
-
- /* Special case: first and only digit is 0. */
- if (slen == 1 && p[0] == '0') {
- if (value != NULL) *value = 0;
- return REDIS_OK;
- }
-
- if (p[0] == '-') {
- negative = 1;
- p++; plen++;
-
- /* Abort on only a negative sign. */
- if (plen == slen)
- return REDIS_ERR;
- }
-
- /* First digit should be 1-9, otherwise the string should just be 0. */
- if (p[0] >= '1' && p[0] <= '9') {
- v = p[0]-'0';
- p++; plen++;
- } else if (p[0] == '0' && slen == 1) {
- *value = 0;
- return REDIS_OK;
- } else {
- return REDIS_ERR;
- }
-
- while (plen < slen && p[0] >= '0' && p[0] <= '9') {
- if (v > (ULLONG_MAX / 10)) /* Overflow. */
- return REDIS_ERR;
- v *= 10;
-
- if (v > (ULLONG_MAX - (p[0]-'0'))) /* Overflow. */
- return REDIS_ERR;
- v += p[0]-'0';
-
- p++; plen++;
- }
-
- /* Return if not all bytes were used. */
- if (plen < slen)
- return REDIS_ERR;
-
- if (negative) {
- if (v > ((unsigned long long)(-(LLONG_MIN+1))+1)) /* Overflow. */
- return REDIS_ERR;
- if (value != NULL) *value = -v;
- } else {
- if (v > LLONG_MAX) /* Overflow. */
- return REDIS_ERR;
- if (value != NULL) *value = v;
- }
- return REDIS_OK;
-}
-
-static char *readLine(redisReader *r, int *_len) {
- char *p, *s;
- int len;
-
- p = r->buf+r->pos;
- s = seekNewline(p,(r->len-r->pos));
- if (s != NULL) {
- len = s-(r->buf+r->pos);
- r->pos += len+2; /* skip \r\n */
- if (_len) *_len = len;
- return p;
- }
- return NULL;
-}
-
-static void moveToNextTask(redisReader *r) {
- redisReadTask *cur, *prv;
- while (r->ridx >= 0) {
- /* Return a.s.a.p. when the stack is now empty. */
- if (r->ridx == 0) {
- r->ridx--;
- return;
- }
-
- cur = r->task[r->ridx];
- prv = r->task[r->ridx-1];
- assert(prv->type == REDIS_REPLY_ARRAY ||
- prv->type == REDIS_REPLY_MAP ||
- prv->type == REDIS_REPLY_SET ||
- prv->type == REDIS_REPLY_PUSH);
- if (cur->idx == prv->elements-1) {
- r->ridx--;
- } else {
- /* Reset the type because the next item can be anything */
- assert(cur->idx < prv->elements);
- cur->type = -1;
- cur->elements = -1;
- cur->idx++;
- return;
- }
- }
-}
-
-static int processLineItem(redisReader *r) {
- redisReadTask *cur = r->task[r->ridx];
- void *obj;
- char *p;
- int len;
-
- if ((p = readLine(r,&len)) != NULL) {
- if (cur->type == REDIS_REPLY_INTEGER) {
- long long v;
-
- if (string2ll(p, len, &v) == REDIS_ERR) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad integer value");
- return REDIS_ERR;
- }
-
- if (r->fn && r->fn->createInteger) {
- obj = r->fn->createInteger(cur,v);
- } else {
- obj = (void*)REDIS_REPLY_INTEGER;
- }
- } else if (cur->type == REDIS_REPLY_DOUBLE) {
- char buf[326], *eptr;
- double d;
-
- if ((size_t)len >= sizeof(buf)) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Double value is too large");
- return REDIS_ERR;
- }
-
- memcpy(buf,p,len);
- buf[len] = '\0';
-
- if (len == 3 && strcasecmp(buf,"inf") == 0) {
- d = INFINITY; /* Positive infinite. */
- } else if (len == 4 && strcasecmp(buf,"-inf") == 0) {
- d = -INFINITY; /* Negative infinite. */
- } else if ((len == 3 && strcasecmp(buf,"nan") == 0) ||
- (len == 4 && strcasecmp(buf, "-nan") == 0)) {
- d = NAN; /* nan. */
- } else {
- d = strtod((char*)buf,&eptr);
- /* RESP3 only allows "inf", "-inf", and finite values, while
- * strtod() allows other variations on infinity,
- * etc. We explicity handle our two allowed infinite cases and NaN
- * above, so strtod() should only result in finite values. */
- if (buf[0] == '\0' || eptr != &buf[len] || !isfinite(d)) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad double value");
- return REDIS_ERR;
- }
- }
-
- if (r->fn && r->fn->createDouble) {
- obj = r->fn->createDouble(cur,d,buf,len);
- } else {
- obj = (void*)REDIS_REPLY_DOUBLE;
- }
- } else if (cur->type == REDIS_REPLY_NIL) {
- if (len != 0) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad nil value");
- return REDIS_ERR;
- }
-
- if (r->fn && r->fn->createNil)
- obj = r->fn->createNil(cur);
- else
- obj = (void*)REDIS_REPLY_NIL;
- } else if (cur->type == REDIS_REPLY_BOOL) {
- int bval;
-
- if (len != 1 || !strchr("tTfF", p[0])) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad bool value");
- return REDIS_ERR;
- }
-
- bval = p[0] == 't' || p[0] == 'T';
- if (r->fn && r->fn->createBool)
- obj = r->fn->createBool(cur,bval);
- else
- obj = (void*)REDIS_REPLY_BOOL;
- } else if (cur->type == REDIS_REPLY_BIGNUM) {
- /* Ensure all characters are decimal digits (with possible leading
- * minus sign). */
- for (int i = 0; i < len; i++) {
- /* XXX Consider: Allow leading '+'? Error on leading '0's? */
- if (i == 0 && p[0] == '-') continue;
- if (p[i] < '0' || p[i] > '9') {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad bignum value");
- return REDIS_ERR;
- }
- }
- if (r->fn && r->fn->createString)
- obj = r->fn->createString(cur,p,len);
- else
- obj = (void*)REDIS_REPLY_BIGNUM;
- } else {
- /* Type will be error or status. */
- for (int i = 0; i < len; i++) {
- if (p[i] == '\r' || p[i] == '\n') {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad simple string value");
- return REDIS_ERR;
- }
- }
- if (r->fn && r->fn->createString)
- obj = r->fn->createString(cur,p,len);
- else
- obj = (void*)(uintptr_t)(cur->type);
- }
-
- if (obj == NULL) {
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
- }
-
- /* Set reply if this is the root object. */
- if (r->ridx == 0) r->reply = obj;
- moveToNextTask(r);
- return REDIS_OK;
- }
-
- return REDIS_ERR;
-}
-
-static int processBulkItem(redisReader *r) {
- redisReadTask *cur = r->task[r->ridx];
- void *obj = NULL;
- char *p, *s;
- long long len;
- unsigned long bytelen;
- int success = 0;
-
- p = r->buf+r->pos;
- s = seekNewline(p,r->len-r->pos);
- if (s != NULL) {
- p = r->buf+r->pos;
- bytelen = s-(r->buf+r->pos)+2; /* include \r\n */
-
- if (string2ll(p, bytelen - 2, &len) == REDIS_ERR) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad bulk string length");
- return REDIS_ERR;
- }
-
- if (len < -1 || (LLONG_MAX > SIZE_MAX && len > (long long)SIZE_MAX)) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bulk string length out of range");
- return REDIS_ERR;
- }
-
- if (len == -1) {
- /* The nil object can always be created. */
- if (r->fn && r->fn->createNil)
- obj = r->fn->createNil(cur);
- else
- obj = (void*)REDIS_REPLY_NIL;
- success = 1;
- } else {
- /* Only continue when the buffer contains the entire bulk item. */
- bytelen += len+2; /* include \r\n */
- if (r->pos+bytelen <= r->len) {
- if ((cur->type == REDIS_REPLY_VERB && len < 4) ||
- (cur->type == REDIS_REPLY_VERB && s[5] != ':'))
- {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Verbatim string 4 bytes of content type are "
- "missing or incorrectly encoded.");
- return REDIS_ERR;
- }
- if (r->fn && r->fn->createString)
- obj = r->fn->createString(cur,s+2,len);
- else
- obj = (void*)(uintptr_t)cur->type;
- success = 1;
- }
- }
-
- /* Proceed when obj was created. */
- if (success) {
- if (obj == NULL) {
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
- }
-
- r->pos += bytelen;
-
- /* Set reply if this is the root object. */
- if (r->ridx == 0) r->reply = obj;
- moveToNextTask(r);
- return REDIS_OK;
- }
- }
-
- return REDIS_ERR;
-}
-
-static int redisReaderGrow(redisReader *r) {
- redisReadTask **aux;
- int newlen;
-
- /* Grow our stack size */
- newlen = r->tasks + REDIS_READER_STACK_SIZE;
- aux = hi_realloc(r->task, sizeof(*r->task) * newlen);
- if (aux == NULL)
- goto oom;
-
- r->task = aux;
-
- /* Allocate new tasks */
- for (; r->tasks < newlen; r->tasks++) {
- r->task[r->tasks] = hi_calloc(1, sizeof(**r->task));
- if (r->task[r->tasks] == NULL)
- goto oom;
- }
-
- return REDIS_OK;
-oom:
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
-}
-
-/* Process the array, map and set types. */
-static int processAggregateItem(redisReader *r) {
- redisReadTask *cur = r->task[r->ridx];
- void *obj;
- char *p;
- long long elements;
- int root = 0, len;
-
- if (r->ridx == r->tasks - 1) {
- if (redisReaderGrow(r) == REDIS_ERR)
- return REDIS_ERR;
- }
-
- if ((p = readLine(r,&len)) != NULL) {
- if (string2ll(p, len, &elements) == REDIS_ERR) {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Bad multi-bulk length");
- return REDIS_ERR;
- }
-
- root = (r->ridx == 0);
-
- if (elements < -1 || (LLONG_MAX > SIZE_MAX && elements > SIZE_MAX) ||
- (r->maxelements > 0 && elements > r->maxelements))
- {
- __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
- "Multi-bulk length out of range");
- return REDIS_ERR;
- }
-
- if (elements == -1) {
- if (r->fn && r->fn->createNil)
- obj = r->fn->createNil(cur);
- else
- obj = (void*)REDIS_REPLY_NIL;
-
- if (obj == NULL) {
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
- }
-
- moveToNextTask(r);
- } else {
- if (cur->type == REDIS_REPLY_MAP) elements *= 2;
-
- if (r->fn && r->fn->createArray)
- obj = r->fn->createArray(cur,elements);
- else
- obj = (void*)(uintptr_t)cur->type;
-
- if (obj == NULL) {
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
- }
-
- /* Modify task stack when there are more than 0 elements. */
- if (elements > 0) {
- cur->elements = elements;
- cur->obj = obj;
- r->ridx++;
- r->task[r->ridx]->type = -1;
- r->task[r->ridx]->elements = -1;
- r->task[r->ridx]->idx = 0;
- r->task[r->ridx]->obj = NULL;
- r->task[r->ridx]->parent = cur;
- r->task[r->ridx]->privdata = r->privdata;
- } else {
- moveToNextTask(r);
- }
- }
-
- /* Set reply if this is the root object. */
- if (root) r->reply = obj;
- return REDIS_OK;
- }
-
- return REDIS_ERR;
-}
-
-static int processItem(redisReader *r) {
- redisReadTask *cur = r->task[r->ridx];
- char *p;
-
- /* check if we need to read type */
- if (cur->type < 0) {
- if ((p = readBytes(r,1)) != NULL) {
- switch (p[0]) {
- case '-':
- cur->type = REDIS_REPLY_ERROR;
- break;
- case '+':
- cur->type = REDIS_REPLY_STATUS;
- break;
- case ':':
- cur->type = REDIS_REPLY_INTEGER;
- break;
- case ',':
- cur->type = REDIS_REPLY_DOUBLE;
- break;
- case '_':
- cur->type = REDIS_REPLY_NIL;
- break;
- case '$':
- cur->type = REDIS_REPLY_STRING;
- break;
- case '*':
- cur->type = REDIS_REPLY_ARRAY;
- break;
- case '%':
- cur->type = REDIS_REPLY_MAP;
- break;
- case '~':
- cur->type = REDIS_REPLY_SET;
- break;
- case '#':
- cur->type = REDIS_REPLY_BOOL;
- break;
- case '=':
- cur->type = REDIS_REPLY_VERB;
- break;
- case '>':
- cur->type = REDIS_REPLY_PUSH;
- break;
- case '(':
- cur->type = REDIS_REPLY_BIGNUM;
- break;
- default:
- __redisReaderSetErrorProtocolByte(r,*p);
- return REDIS_ERR;
- }
- } else {
- /* could not consume 1 byte */
- return REDIS_ERR;
- }
- }
-
- /* process typed item */
- switch(cur->type) {
- case REDIS_REPLY_ERROR:
- case REDIS_REPLY_STATUS:
- case REDIS_REPLY_INTEGER:
- case REDIS_REPLY_DOUBLE:
- case REDIS_REPLY_NIL:
- case REDIS_REPLY_BOOL:
- case REDIS_REPLY_BIGNUM:
- return processLineItem(r);
- case REDIS_REPLY_STRING:
- case REDIS_REPLY_VERB:
- return processBulkItem(r);
- case REDIS_REPLY_ARRAY:
- case REDIS_REPLY_MAP:
- case REDIS_REPLY_SET:
- case REDIS_REPLY_PUSH:
- return processAggregateItem(r);
- default:
- assert(NULL);
- return REDIS_ERR; /* Avoid warning. */
- }
-}
-
-redisReader *redisReaderCreateWithFunctions(redisReplyObjectFunctions *fn) {
- redisReader *r;
-
- r = hi_calloc(1,sizeof(redisReader));
- if (r == NULL)
- return NULL;
-
- r->buf = hi_sdsempty();
- if (r->buf == NULL)
- goto oom;
-
- r->task = hi_calloc(REDIS_READER_STACK_SIZE, sizeof(*r->task));
- if (r->task == NULL)
- goto oom;
-
- for (; r->tasks < REDIS_READER_STACK_SIZE; r->tasks++) {
- r->task[r->tasks] = hi_calloc(1, sizeof(**r->task));
- if (r->task[r->tasks] == NULL)
- goto oom;
- }
-
- r->fn = fn;
- r->maxbuf = REDIS_READER_MAX_BUF;
- r->maxelements = REDIS_READER_MAX_ARRAY_ELEMENTS;
- r->ridx = -1;
-
- return r;
-oom:
- redisReaderFree(r);
- return NULL;
-}
-
-void redisReaderFree(redisReader *r) {
- if (r == NULL)
- return;
-
- if (r->reply != NULL && r->fn && r->fn->freeObject)
- r->fn->freeObject(r->reply);
-
- if (r->task) {
- /* We know r->task[i] is allocated if i < r->tasks */
- for (int i = 0; i < r->tasks; i++) {
- hi_free(r->task[i]);
- }
-
- hi_free(r->task);
- }
-
- hi_sdsfree(r->buf);
- hi_free(r);
-}
-
-int redisReaderFeed(redisReader *r, const char *buf, size_t len) {
- hisds newbuf;
-
- /* Return early when this reader is in an erroneous state. */
- if (r->err)
- return REDIS_ERR;
-
- /* Copy the provided buffer. */
- if (buf != NULL && len >= 1) {
- /* Destroy internal buffer when it is empty and is quite large. */
- if (r->len == 0 && r->maxbuf != 0 && hi_sdsavail(r->buf) > r->maxbuf) {
- hi_sdsfree(r->buf);
- r->buf = hi_sdsempty();
- if (r->buf == 0) goto oom;
-
- r->pos = 0;
- }
-
- newbuf = hi_sdscatlen(r->buf,buf,len);
- if (newbuf == NULL) goto oom;
-
- r->buf = newbuf;
- r->len = hi_sdslen(r->buf);
- }
-
- return REDIS_OK;
-oom:
- __redisReaderSetErrorOOM(r);
- return REDIS_ERR;
-}
-
-int redisReaderGetReply(redisReader *r, void **reply) {
- /* Default target pointer to NULL. */
- if (reply != NULL)
- *reply = NULL;
-
- /* Return early when this reader is in an erroneous state. */
- if (r->err)
- return REDIS_ERR;
-
- /* When the buffer is empty, there will never be a reply. */
- if (r->len == 0)
- return REDIS_OK;
-
- /* Set first item to process when the stack is empty. */
- if (r->ridx == -1) {
- r->task[0]->type = -1;
- r->task[0]->elements = -1;
- r->task[0]->idx = -1;
- r->task[0]->obj = NULL;
- r->task[0]->parent = NULL;
- r->task[0]->privdata = r->privdata;
- r->ridx = 0;
- }
-
- /* Process items in reply. */
- while (r->ridx >= 0)
- if (processItem(r) != REDIS_OK)
- break;
-
- /* Return ASAP when an error occurred. */
- if (r->err)
- return REDIS_ERR;
-
- /* Discard part of the buffer when we've consumed at least 1k, to avoid
- * doing unnecessary calls to memmove() in sds.c. */
- if (r->pos >= 1024) {
- if (hi_sdsrange(r->buf,r->pos,-1) < 0) return REDIS_ERR;
- r->pos = 0;
- r->len = hi_sdslen(r->buf);
- }
-
- /* Emit a reply when there is one. */
- if (r->ridx == -1) {
- if (reply != NULL) {
- *reply = r->reply;
- } else if (r->reply != NULL && r->fn && r->fn->freeObject) {
- r->fn->freeObject(r->reply);
- }
- r->reply = NULL;
- }
- return REDIS_OK;
-}