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/*
*
* Copyright 2014, Google 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 Google Inc. 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 "test/core/util/slice_splitter.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/useful.h>
const char *grpc_slice_split_mode_name(grpc_slice_split_mode mode) {
switch (mode) {
case GRPC_SLICE_SPLIT_IDENTITY:
return "identity";
case GRPC_SLICE_SPLIT_MERGE_ALL:
return "merge_all";
case GRPC_SLICE_SPLIT_ONE_BYTE:
return "one_byte";
}
return "error";
}
void grpc_split_slices(grpc_slice_split_mode mode, gpr_slice *src_slices,
size_t src_slice_count, gpr_slice **dst_slices,
size_t *dst_slice_count) {
size_t i, j;
size_t length;
switch (mode) {
case GRPC_SLICE_SPLIT_IDENTITY:
*dst_slice_count = src_slice_count;
*dst_slices = gpr_malloc(sizeof(gpr_slice) * src_slice_count);
for (i = 0; i < src_slice_count; i++) {
(*dst_slices)[i] = src_slices[i];
gpr_slice_ref((*dst_slices)[i]);
}
break;
case GRPC_SLICE_SPLIT_MERGE_ALL:
*dst_slice_count = 1;
length = 0;
for (i = 0; i < src_slice_count; i++) {
length += GPR_SLICE_LENGTH(src_slices[i]);
}
*dst_slices = gpr_malloc(sizeof(gpr_slice));
**dst_slices = gpr_slice_malloc(length);
length = 0;
for (i = 0; i < src_slice_count; i++) {
memcpy(GPR_SLICE_START_PTR(**dst_slices) + length,
GPR_SLICE_START_PTR(src_slices[i]),
GPR_SLICE_LENGTH(src_slices[i]));
length += GPR_SLICE_LENGTH(src_slices[i]);
}
break;
case GRPC_SLICE_SPLIT_ONE_BYTE:
length = 0;
for (i = 0; i < src_slice_count; i++) {
length += GPR_SLICE_LENGTH(src_slices[i]);
}
*dst_slice_count = length;
*dst_slices = gpr_malloc(sizeof(gpr_slice) * length);
length = 0;
for (i = 0; i < src_slice_count; i++) {
for (j = 0; j < GPR_SLICE_LENGTH(src_slices[i]); j++) {
(*dst_slices)[length] = gpr_slice_sub(src_slices[i], j, j + 1);
length++;
}
}
break;
}
}
void grpc_split_slices_to_buffer(grpc_slice_split_mode mode,
gpr_slice *src_slices, size_t src_slice_count,
gpr_slice_buffer *dst) {
gpr_slice *slices;
size_t nslices;
size_t i;
grpc_split_slices(mode, src_slices, src_slice_count, &slices, &nslices);
for (i = 0; i < nslices; i++) {
/* add indexed to avoid re-merging split slices */
gpr_slice_buffer_add_indexed(dst, slices[i]);
}
gpr_free(slices);
}
void grpc_split_slice_buffer(grpc_slice_split_mode mode, gpr_slice_buffer *src,
gpr_slice_buffer *dst) {
grpc_split_slices_to_buffer(mode, src->slices, src->count, dst);
}
gpr_slice grpc_slice_merge(gpr_slice *slices, size_t nslices) {
gpr_uint8 *out = NULL;
size_t length = 0;
size_t capacity = 0;
size_t i;
for (i = 0; i < nslices; i++) {
if (GPR_SLICE_LENGTH(slices[i]) + length > capacity) {
capacity = GPR_MAX(capacity * 2, GPR_SLICE_LENGTH(slices[i]) + length);
out = gpr_realloc(out, capacity);
}
memcpy(out + length, GPR_SLICE_START_PTR(slices[i]),
GPR_SLICE_LENGTH(slices[i]));
length += GPR_SLICE_LENGTH(slices[i]);
}
return gpr_slice_new(out, length, gpr_free);
}
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