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/*
* librdkafka - The Apache Kafka C/C++ library
*
* Copyright (c) 2017 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_header.h"
#define rd_kafka_header_destroy rd_free
void rd_kafka_headers_destroy(rd_kafka_headers_t *hdrs) {
rd_list_destroy(&hdrs->rkhdrs_list);
rd_free(hdrs);
}
rd_kafka_headers_t *rd_kafka_headers_new(size_t initial_count) {
rd_kafka_headers_t *hdrs;
hdrs = rd_malloc(sizeof(*hdrs));
rd_list_init(&hdrs->rkhdrs_list, (int)initial_count,
rd_kafka_header_destroy);
hdrs->rkhdrs_ser_size = 0;
return hdrs;
}
static void *rd_kafka_header_copy(const void *_src, void *opaque) {
rd_kafka_headers_t *hdrs = opaque;
const rd_kafka_header_t *src = (const rd_kafka_header_t *)_src;
return (void *)rd_kafka_header_add(
hdrs, src->rkhdr_name, src->rkhdr_name_size, src->rkhdr_value,
src->rkhdr_value_size);
}
rd_kafka_headers_t *rd_kafka_headers_copy(const rd_kafka_headers_t *src) {
rd_kafka_headers_t *dst;
dst = rd_malloc(sizeof(*dst));
rd_list_init(&dst->rkhdrs_list, rd_list_cnt(&src->rkhdrs_list),
rd_kafka_header_destroy);
dst->rkhdrs_ser_size = 0; /* Updated by header_copy() */
rd_list_copy_to(&dst->rkhdrs_list, &src->rkhdrs_list,
rd_kafka_header_copy, dst);
return dst;
}
rd_kafka_resp_err_t rd_kafka_header_add(rd_kafka_headers_t *hdrs,
const char *name,
ssize_t name_size,
const void *value,
ssize_t value_size) {
rd_kafka_header_t *hdr;
char varint_NameLen[RD_UVARINT_ENC_SIZEOF(int32_t)];
char varint_ValueLen[RD_UVARINT_ENC_SIZEOF(int32_t)];
if (name_size == -1)
name_size = strlen(name);
if (value_size == -1)
value_size = value ? strlen(value) : 0;
else if (!value)
value_size = 0;
hdr = rd_malloc(sizeof(*hdr) + name_size + 1 + value_size + 1);
hdr->rkhdr_name_size = name_size;
memcpy((void *)hdr->rkhdr_name, name, name_size);
hdr->rkhdr_name[name_size] = '\0';
if (likely(value != NULL)) {
hdr->rkhdr_value = hdr->rkhdr_name + name_size + 1;
memcpy((void *)hdr->rkhdr_value, value, value_size);
hdr->rkhdr_value[value_size] = '\0';
hdr->rkhdr_value_size = value_size;
} else {
hdr->rkhdr_value = NULL;
hdr->rkhdr_value_size = 0;
}
rd_list_add(&hdrs->rkhdrs_list, hdr);
/* Calculate serialized size of header */
hdr->rkhdr_ser_size = name_size + value_size;
hdr->rkhdr_ser_size += rd_uvarint_enc_i64(
varint_NameLen, sizeof(varint_NameLen), name_size);
hdr->rkhdr_ser_size += rd_uvarint_enc_i64(
varint_ValueLen, sizeof(varint_ValueLen), value_size);
hdrs->rkhdrs_ser_size += hdr->rkhdr_ser_size;
return RD_KAFKA_RESP_ERR_NO_ERROR;
}
/**
* @brief header_t(name) to char * comparator
*/
static int rd_kafka_header_cmp_str(void *_a, void *_b) {
const rd_kafka_header_t *a = _a;
const char *b = _b;
return strcmp(a->rkhdr_name, b);
}
rd_kafka_resp_err_t rd_kafka_header_remove(rd_kafka_headers_t *hdrs,
const char *name) {
size_t ser_size = 0;
rd_kafka_header_t *hdr;
int i;
RD_LIST_FOREACH_REVERSE(hdr, &hdrs->rkhdrs_list, i) {
if (rd_kafka_header_cmp_str(hdr, (void *)name))
continue;
ser_size += hdr->rkhdr_ser_size;
rd_list_remove_elem(&hdrs->rkhdrs_list, i);
rd_kafka_header_destroy(hdr);
}
if (ser_size == 0)
return RD_KAFKA_RESP_ERR__NOENT;
rd_dassert(hdrs->rkhdrs_ser_size >= ser_size);
hdrs->rkhdrs_ser_size -= ser_size;
return RD_KAFKA_RESP_ERR_NO_ERROR;
}
rd_kafka_resp_err_t rd_kafka_header_get_last(const rd_kafka_headers_t *hdrs,
const char *name,
const void **valuep,
size_t *sizep) {
const rd_kafka_header_t *hdr;
int i;
size_t name_size = strlen(name);
RD_LIST_FOREACH_REVERSE(hdr, &hdrs->rkhdrs_list, i) {
if (hdr->rkhdr_name_size == name_size &&
!strcmp(hdr->rkhdr_name, name)) {
*valuep = hdr->rkhdr_value;
*sizep = hdr->rkhdr_value_size;
return RD_KAFKA_RESP_ERR_NO_ERROR;
}
}
return RD_KAFKA_RESP_ERR__NOENT;
}
rd_kafka_resp_err_t rd_kafka_header_get(const rd_kafka_headers_t *hdrs,
size_t idx,
const char *name,
const void **valuep,
size_t *sizep) {
const rd_kafka_header_t *hdr;
int i;
size_t mi = 0; /* index for matching names */
size_t name_size = strlen(name);
RD_LIST_FOREACH(hdr, &hdrs->rkhdrs_list, i) {
if (hdr->rkhdr_name_size == name_size &&
!strcmp(hdr->rkhdr_name, name) && mi++ == idx) {
*valuep = hdr->rkhdr_value;
*sizep = hdr->rkhdr_value_size;
return RD_KAFKA_RESP_ERR_NO_ERROR;
}
}
return RD_KAFKA_RESP_ERR__NOENT;
}
rd_kafka_resp_err_t rd_kafka_header_get_all(const rd_kafka_headers_t *hdrs,
size_t idx,
const char **namep,
const void **valuep,
size_t *sizep) {
const rd_kafka_header_t *hdr;
hdr = rd_list_elem(&hdrs->rkhdrs_list, (int)idx);
if (unlikely(!hdr))
return RD_KAFKA_RESP_ERR__NOENT;
*namep = hdr->rkhdr_name;
*valuep = hdr->rkhdr_value;
*sizep = hdr->rkhdr_value_size;
return RD_KAFKA_RESP_ERR_NO_ERROR;
}
size_t rd_kafka_header_cnt(const rd_kafka_headers_t *hdrs) {
return (size_t)rd_list_cnt(&hdrs->rkhdrs_list);
}
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