81 lines
1.2 KiB
C++
81 lines
1.2 KiB
C++
#include <cstring>
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#include <string>
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int test1(const std::string& str, const char* pattern)
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{
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const char* strPtr = str.c_str();
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const char* ptr = &strPtr[str.size()-1];
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do
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{
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if (*ptr == pattern[0])
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{
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if (ptr != strPtr && !std::isspace(*(ptr-1)))
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continue;
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const char* p = &pattern[1];
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const char* tPtr = ptr+1;
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while (true)
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{
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if (*p == '\0')
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{
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if (*tPtr == '\0' || std::isspace(*tPtr))
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return ptr-strPtr;
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else
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break;
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}
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if (*tPtr != *p)
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break;
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p++;
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tPtr++;
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}
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}
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}
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while (ptr-- != strPtr);
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return -1;
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}
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int test2(const std::string& str, const std::string& pattern)
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{
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const char* s = str.c_str();
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unsigned int size = pattern.size();
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const char* ptr = &s[str.size()-1];
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const char* limit = &s[size-1];
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do
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{
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if (*ptr == pattern[size-1])
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{
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if (*(ptr+1) != '\0' && !std::isspace(*(ptr+1)))
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continue;
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const char* p = &pattern[size-1];
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for (; p >= &pattern[0]; --p, --ptr)
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{
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if (*ptr != *p)
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break;
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if (p == &pattern[0])
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{
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if (ptr == s || std::isspace(*(ptr-1)))
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return ptr-s;
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else
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break;
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}
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if (ptr == s)
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return -1;
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}
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}
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}
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while (ptr-- > limit);
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return -1;
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}
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