libk/src/ctype.c


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#include <ctype.h>

int isspace(int c) {
    switch (c) {
        case ' ':
        case '\t':
        case '\v':
        case '\f':
        case '\r':
        case '\n':
            return 1;
        default:
            return 0;
    }
}

int isdigit(int c) {
    return c - '0' > -1 && c - '0' < 10;
}