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25 lines
481 B
C
Executable File
25 lines
481 B
C
Executable File
/*
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* strcmpi.c
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*/
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#include <string.h>
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#include <ctype.h>
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int strcmpi(const char *s1, const char *s2)
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{
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const unsigned char *c1 = (const unsigned char *)s1;
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const unsigned char *c2 = (const unsigned char *)s2;
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unsigned char ch;
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int d = 0;
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while (1) {
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/* toupper() expects an unsigned char (implicitly cast to int)
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as input, and returns an int, which is exactly what we want. */
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d = toupper(ch = *c1++) - toupper(*c2++);
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if (d || !ch)
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break;
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}
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return d;
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}
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