mirror of https://github.com/tailix/libkernaux.git
36 lines
494 B
C
36 lines
494 B
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <ctype.h>
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int isdigit(const int c)
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{
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return (unsigned)c - '0' < 10;
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}
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int islower(const int c)
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{
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return (unsigned)c - 'a' < 26;
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}
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int isspace(const int c)
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{
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return c == ' ' || (unsigned)c - '\t' < 5;
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}
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int isupper(const int c)
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{
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return (unsigned)c - 'A' < 26;
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}
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int tolower(const int c)
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{
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return isupper(c) ? (c + ('a' - 'A')) : c;
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}
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int toupper(const int c)
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{
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return islower(c) ? (c - ('a' - 'A')) : c;
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}
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