54 lines
846 B
C
54 lines
846 B
C
#include <ctype.h>
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int isdigit(int c) {
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return (unsigned)c-'0' < 10;
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}
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int isxdigit(int c) {
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return isdigit(c) || ((unsigned)c|32)-'a' < 6;
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}
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int isblank(int c) {
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return (c == ' ' || c == '\t');
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}
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int isspace(int c) {
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return (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v');
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}
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int islower(int c) {
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return (unsigned)c-'a' < 26;
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}
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int isupper(int c) {
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return (unsigned)c-'A' < 26;
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}
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int isalpha(int c) {
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return isupper(c) || islower(c);
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}
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int isalnum(int c) {
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return isalpha(c) || isdigit(c);
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}
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int iscntrl(int c) {
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return (unsigned)c < 0x20 || c == 0x7f;
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}
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int isprint(int c) {
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return (unsigned)c-0x20 < 0x5f;
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}
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int isgraph(int c) {
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return (unsigned)c-0x21 < 0x5e;
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}
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int tolower(int c) {
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return isupper(c) ? (c | 32) : c;
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}
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int toupper(int c) {
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return islower(c) ? c & 0x5f : c;
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}
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