gis/token.c

Go to the documentation of this file.

#include <stdlib.h>
#include <grass/gis.h>


char **G_tokenize(const char *buf, const char *delim)
{
    int i;
    char **tokens;
    char *p;

    i = 0;
    while (!G_index(delim, *buf) && (*buf == ' ' || *buf == '\t'))      /* needed for G_free () */
        buf++;

    p = G_store(buf);

    tokens = (char **)G_malloc(sizeof(char *));

    while (1) {
        while (!G_index(delim, *p) && (*p == ' ' || *p == '\t'))
            p++;
        if (*p == 0)
            break;
        tokens[i++] = p;
        tokens = (char **)G_realloc((char *)tokens, (i + 1) * sizeof(char *));

        while (*p && (G_index(delim, *p) == NULL))
            p++;
        if (*p == 0)
            break;
        *p++ = 0;
    }
    tokens[i] = NULL;

    return (tokens);
}


int G_number_of_tokens(char **tokens)
{
    int n;

    for (n = 0; tokens[n] != NULL; n++) {
        /* nothing */
    }

    return n;
}


int G_free_tokens(char **tokens)
{
    if (tokens[0] != NULL)
        G_free(tokens[0]);
    G_free(tokens);

    return (0);
}