ucmd.c

Go to the documentation of this file.

#include <stdlib.h>  // free
#include <string.h>  // strlen, strcpy, strtok, strcmp
#include "ucmd.h"

int ucmd_parse(Command cmd_list[], const char *delim, const char *in)
{
    if (!in || strlen(in) == 0) return 0;        // return 0 for empty commands
    if (!cmd_list) return UCMD_CMD_NOT_FOUND;   // obviously not found, no list

    delim = (delim) ? delim : UCMD_DEFAULT_DELIMETER;

    int retval = 0;

    char *s = malloc(strlen(in)+1);                 // just in case in is const
    strcpy(s, in);

    int argc = 0;
    char **argv = NULL;

    char *arg = strtok(s, delim);
    while (arg) {
        argc++;
        argv = realloc(argv, argc * sizeof(*argv));
        argv[argc-1] = arg;
        arg = strtok(NULL, delim);
    }

    if (argc) {
        Command *c = NULL;
        for (Command *p = cmd_list; p->cmd; p++) {
            if (strcmp(p->cmd, argv[0]) == 0) {
                c = p;
            }
        }
        if (c) {
            retval = c->fn(argc, argv);
        } else {
            retval = UCMD_CMD_NOT_FOUND;
        }
    }

    free(argv);
    free(s);

    return retval;
}