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/*
* librdkafka - The Apache Kafka C/C++ library
*
* Copyright (c) 2015 Magnus Edenhill
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
*
* 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 "rdkafka_int.h"
#include "rdkafka_pattern.h"
void rd_kafka_pattern_destroy(rd_kafka_pattern_list_t *plist,
rd_kafka_pattern_t *rkpat) {
TAILQ_REMOVE(&plist->rkpl_head, rkpat, rkpat_link);
rd_regex_destroy(rkpat->rkpat_re);
rd_free(rkpat->rkpat_orig);
rd_free(rkpat);
}
void rd_kafka_pattern_add(rd_kafka_pattern_list_t *plist,
rd_kafka_pattern_t *rkpat) {
TAILQ_INSERT_TAIL(&plist->rkpl_head, rkpat, rkpat_link);
}
rd_kafka_pattern_t *
rd_kafka_pattern_new(const char *pattern, char *errstr, int errstr_size) {
rd_kafka_pattern_t *rkpat;
rkpat = rd_calloc(1, sizeof(*rkpat));
/* Verify and precompile pattern */
if (!(rkpat->rkpat_re = rd_regex_comp(pattern, errstr, errstr_size))) {
rd_free(rkpat);
return NULL;
}
rkpat->rkpat_orig = rd_strdup(pattern);
return rkpat;
}
int rd_kafka_pattern_match(rd_kafka_pattern_list_t *plist, const char *str) {
rd_kafka_pattern_t *rkpat;
TAILQ_FOREACH(rkpat, &plist->rkpl_head, rkpat_link) {
if (rd_regex_exec(rkpat->rkpat_re, str))
return 1;
}
return 0;
}
/**
* Append pattern to list.
*/
int rd_kafka_pattern_list_append(rd_kafka_pattern_list_t *plist,
const char *pattern,
char *errstr,
int errstr_size) {
rd_kafka_pattern_t *rkpat;
rkpat = rd_kafka_pattern_new(pattern, errstr, errstr_size);
if (!rkpat)
return -1;
rd_kafka_pattern_add(plist, rkpat);
return 0;
}
/**
* Remove matching patterns.
* Returns the number of removed patterns.
*/
int rd_kafka_pattern_list_remove(rd_kafka_pattern_list_t *plist,
const char *pattern) {
rd_kafka_pattern_t *rkpat, *rkpat_tmp;
int cnt = 0;
TAILQ_FOREACH_SAFE(rkpat, &plist->rkpl_head, rkpat_link, rkpat_tmp) {
if (!strcmp(rkpat->rkpat_orig, pattern)) {
rd_kafka_pattern_destroy(plist, rkpat);
cnt++;
}
}
return cnt;
}
/**
* Parse a patternlist and populate a list with it.
*/
static int rd_kafka_pattern_list_parse(rd_kafka_pattern_list_t *plist,
const char *patternlist,
char *errstr,
size_t errstr_size) {
char *s;
rd_strdupa(&s, patternlist);
while (s && *s) {
char *t = s;
char re_errstr[256];
/* Find separator */
while ((t = strchr(t, ','))) {
if (t > s && *(t - 1) == ',') {
/* separator was escaped,
remove escape and scan again. */
memmove(t - 1, t, strlen(t) + 1);
t++;
} else {
*t = '\0';
t++;
break;
}
}
if (rd_kafka_pattern_list_append(plist, s, re_errstr,
sizeof(re_errstr)) == -1) {
rd_snprintf(errstr, errstr_size,
"Failed to parse pattern \"%s\": "
"%s",
s, re_errstr);
rd_kafka_pattern_list_clear(plist);
return -1;
}
s = t;
}
return 0;
}
/**
* Clear a pattern list.
*/
void rd_kafka_pattern_list_clear(rd_kafka_pattern_list_t *plist) {
rd_kafka_pattern_t *rkpat;
while ((rkpat = TAILQ_FIRST(&plist->rkpl_head)))
rd_kafka_pattern_destroy(plist, rkpat);
if (plist->rkpl_orig) {
rd_free(plist->rkpl_orig);
plist->rkpl_orig = NULL;
}
}
/**
* Free a pattern list previously created with list_new()
*/
void rd_kafka_pattern_list_destroy(rd_kafka_pattern_list_t *plist) {
rd_kafka_pattern_list_clear(plist);
rd_free(plist);
}
/**
* Initialize a pattern list, optionally populating it with the
* comma-separated patterns in 'patternlist'.
*/
int rd_kafka_pattern_list_init(rd_kafka_pattern_list_t *plist,
const char *patternlist,
char *errstr,
size_t errstr_size) {
TAILQ_INIT(&plist->rkpl_head);
if (patternlist) {
if (rd_kafka_pattern_list_parse(plist, patternlist, errstr,
errstr_size) == -1)
return -1;
plist->rkpl_orig = rd_strdup(patternlist);
} else
plist->rkpl_orig = NULL;
return 0;
}
/**
* Allocate and initialize a new list.
*/
rd_kafka_pattern_list_t *rd_kafka_pattern_list_new(const char *patternlist,
char *errstr,
int errstr_size) {
rd_kafka_pattern_list_t *plist;
plist = rd_calloc(1, sizeof(*plist));
if (rd_kafka_pattern_list_init(plist, patternlist, errstr,
errstr_size) == -1) {
rd_free(plist);
return NULL;
}
return plist;
}
/**
* Make a copy of a pattern list.
*/
rd_kafka_pattern_list_t *
rd_kafka_pattern_list_copy(rd_kafka_pattern_list_t *src) {
char errstr[16];
return rd_kafka_pattern_list_new(src->rkpl_orig, errstr,
sizeof(errstr));
}
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