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Diffstat (limited to 'test/core/util/slice_splitter.c')
| -rw-r--r-- | test/core/util/slice_splitter.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/test/core/util/slice_splitter.c b/test/core/util/slice_splitter.c new file mode 100644 index 0000000000..1682ef4fcd --- /dev/null +++ b/test/core/util/slice_splitter.c @@ -0,0 +1,138 @@ +/* + * + * 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); +} |