mirror of
https://github.com/danog/libtgvoip.git
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5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
111 lines
3.1 KiB
C++
Executable File
111 lines
3.1 KiB
C++
Executable File
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/strings/internal/memutil.h"
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#include <cstdlib>
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namespace absl {
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namespace strings_internal {
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int memcasecmp(const char* s1, const char* s2, size_t len) {
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const unsigned char* us1 = reinterpret_cast<const unsigned char*>(s1);
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const unsigned char* us2 = reinterpret_cast<const unsigned char*>(s2);
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for (size_t i = 0; i < len; i++) {
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const int diff =
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int{static_cast<unsigned char>(absl::ascii_tolower(us1[i]))} -
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int{static_cast<unsigned char>(absl::ascii_tolower(us2[i]))};
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if (diff != 0) return diff;
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}
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return 0;
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}
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char* memdup(const char* s, size_t slen) {
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void* copy;
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if ((copy = malloc(slen)) == nullptr) return nullptr;
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memcpy(copy, s, slen);
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return reinterpret_cast<char*>(copy);
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}
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char* memrchr(const char* s, int c, size_t slen) {
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for (const char* e = s + slen - 1; e >= s; e--) {
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if (*e == c) return const_cast<char*>(e);
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}
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return nullptr;
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}
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size_t memspn(const char* s, size_t slen, const char* accept) {
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const char* p = s;
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const char* spanp;
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char c, sc;
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cont:
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c = *p++;
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if (slen-- == 0) return p - 1 - s;
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for (spanp = accept; (sc = *spanp++) != '\0';)
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if (sc == c) goto cont;
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return p - 1 - s;
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}
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size_t memcspn(const char* s, size_t slen, const char* reject) {
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const char* p = s;
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const char* spanp;
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char c, sc;
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while (slen-- != 0) {
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c = *p++;
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for (spanp = reject; (sc = *spanp++) != '\0';)
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if (sc == c) return p - 1 - s;
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}
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return p - s;
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}
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char* mempbrk(const char* s, size_t slen, const char* accept) {
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const char* scanp;
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int sc;
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for (; slen; ++s, --slen) {
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for (scanp = accept; (sc = *scanp++) != '\0';)
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if (sc == *s) return const_cast<char*>(s);
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}
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return nullptr;
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}
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// This is significantly faster for case-sensitive matches with very
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// few possible matches. See unit test for benchmarks.
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const char* memmatch(const char* phaystack, size_t haylen, const char* pneedle,
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size_t neelen) {
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if (0 == neelen) {
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return phaystack; // even if haylen is 0
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}
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if (haylen < neelen) return nullptr;
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const char* match;
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const char* hayend = phaystack + haylen - neelen + 1;
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// A static cast is used here to work around the fact that memchr returns
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// a void* on Posix-compliant systems and const void* on Windows.
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while ((match = static_cast<const char*>(
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memchr(phaystack, pneedle[0], hayend - phaystack)))) {
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if (memcmp(match, pneedle, neelen) == 0)
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return match;
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else
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phaystack = match + 1;
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}
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return nullptr;
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}
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} // namespace strings_internal
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} // namespace absl
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