ti83-sdk/lib83/ctype.c

#include <ctype.h>

#define NONE  0x00
#define ALPHA 0x01
#define DIGIT 0x02
#define LOWER 0x04
#define UPPER 0x08
#define SPECL 0x10
#define SPACE 0x20
#define PUNCT 0x40
#define GRAPH 0x80

// TODO.
static unsigned char tab[256] = {
    GRAPH, LOWER|SPECL|ALPHA, LOWER|SPECL|ALPHA, LOWER|SPECL|ALPHA, LOWER|SPECL|ALPHA, GRAPH, GRAPH, GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL,
    GRAPH|SPECL, SPECL, SPECL, GRAPH|SPECL, GRAPH|SPECL, GRAPH|SPECL, GRAPH|SPECL, SPECL, SPECL, SPECL, SPECL, SPECL, SPECL, SPECL, GRAPH|SPECL, GRAPH|SPECL,
    SPACE, PUNCT|SPECL, PUNCT|SPECL, SPECL|GRAPH, SPECL, SPECL|GRAPH, PUNCT|SPECL|GRAPH, PUNCT|SPECL|GRAPH, PUNCT|SPECL|GRAPH, PUNCT|SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, PUNCT|SPECL|GRAPH, SPECL|GRAPH, PUNCT|SPECL|GRAPH, SPECL|GRAPH,
    PUNCT|SPECL|GRAPH, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA,

    UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, UPPER|ALPHA, SPECL|GRAPH|ALPHA, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH, SPECL|GRAPH,
    PUNCT|SPECL|GRAPH, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA,
    LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, LOWER|ALPHA, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,

    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,

    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
    NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE
};

int isalnum(int c) {
    return tab[c & 0xFF] & (ALPHA | DIGIT);
}

int isalpha(int c) {
    return tab[c & 0xFF] & ALPHA;
}

int islower(int c) {
    return tab[c & 0xFF] & LOWER;
}

int isupper(int c) {
    return tab[c & 0xFF] & UPPER;
}

int isdigit(int c) {
    return tab[c & 0xFF] & DIGIT;
}

int isspecl(int c) {
    return tab[c & 0xFF] & SPECL;
}

int isspace(int c) {
    return tab[c & 0xFF] & SPACE;
}

int ispunct(int c) {
    return tab[c & 0xFF] & PUNCT;
}

int isgraph(int c) {
    return tab[c & 0xFF] & GRAPH;
}