mirror of
https://libwebsockets.org/repo/libwebsockets
synced 2024-11-24 09:46:44 +00:00
c9731c5f17
This is a huge patch that should be a global NOP. For unix type platforms it enables -Wconversion to issue warnings (-> error) for all automatic casts that seem less than ideal but are normally concealed by the toolchain. This is things like passing an int to a size_t argument. Once enabled, I went through all args on my default build (which build most things) and tried to make the removed default cast explicit. With that approach it neither change nor bloat the code, since it compiles to whatever it was doing before, just with the casts made explicit... in a few cases I changed some length args from int to size_t but largely left the causes alone. From now on, new code that is relying on less than ideal casting will complain and nudge me to improve it by warnings.
114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "private-lib-core.h"
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static int
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lcs_init_compression_deflate(lws_comp_ctx_t *ctx, int decomp)
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{
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int n;
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ctx->is_decompression = !!decomp;
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ctx->u.deflate = lws_malloc(sizeof(*ctx->u.deflate), __func__);
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if (!ctx->u.deflate)
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return 2;
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memset(ctx->u.deflate, 0, sizeof(*ctx->u.deflate));
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if (!decomp &&
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(n = deflateInit2(ctx->u.deflate, 1, Z_DEFLATED, -15, 8,
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Z_DEFAULT_STRATEGY)) != Z_OK) {
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lwsl_err("deflate init failed: %d\n", n);
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lws_free_set_NULL(ctx->u.deflate);
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return 1;
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}
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if (decomp &&
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inflateInit2(ctx->u.deflate, 16 + 15) != Z_OK) {
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lws_free_set_NULL(ctx->u.deflate);
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return 1;
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}
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return 0;
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}
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static int
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lcs_process_deflate(lws_comp_ctx_t *ctx, const void *in, size_t *ilen_iused,
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void *out, size_t *olen_oused)
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{
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size_t olen_oused_in = *olen_oused;
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int n;
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ctx->u.deflate->next_in = (void *)in;
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ctx->u.deflate->avail_in = (unsigned int)*ilen_iused;
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ctx->u.deflate->next_out = out;
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ctx->u.deflate->avail_out = (unsigned int)*olen_oused;
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if (!ctx->is_decompression)
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n = deflate(ctx->u.deflate, Z_SYNC_FLUSH);
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else
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n = inflate(ctx->u.deflate, Z_SYNC_FLUSH);
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switch (n) {
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case Z_NEED_DICT:
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case Z_STREAM_ERROR:
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case Z_DATA_ERROR:
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case Z_MEM_ERROR:
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lwsl_err("zlib error inflate %d\n", n);
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return -1;
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}
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*ilen_iused -= ctx->u.deflate->avail_in;
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*olen_oused -= ctx->u.deflate->avail_out;
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/* it's ambiguous with zlib... */
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ctx->may_have_more = (*olen_oused == olen_oused_in);
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return n == Z_STREAM_END;
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}
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static void
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lcs_destroy_deflate(lws_comp_ctx_t *ctx)
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{
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if (!ctx)
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return;
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if (!(*ctx).is_decompression)
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deflateEnd((*ctx).u.deflate);
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else
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inflateEnd((*ctx).u.deflate);
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lws_free_set_NULL(ctx->u.deflate);
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}
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struct lws_compression_support lcs_deflate = {
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/* .encoding_name */ "deflate",
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/* .init_compression */ lcs_init_compression_deflate,
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/* .process */ lcs_process_deflate,
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/* .destroy */ lcs_destroy_deflate,
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};
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