Re: [Dev-C++] trim / sub string

/* Note 1 - remember to free() string after use. */
/* Note 2 - start is zero-relative. */
char* substr(const char* s,size_t start,size_t len) {
    char *p;
    size_t slen;

    if (s == NULL) return NULL;
    slen = strlen(s);
    if (start >= slen) {
        start = slen;
        len = 0;
    }
    if (start + len > slen) len = slen - start;
    p = (char*)malloc((len+1)*sizeof(char));
    strncpy(p,s+start,len);
    p[len] = '\0';
    return p;
}

/Per W

On Sat, 28 Dec 2002, Danny Roelofs wrote:

> Hi,
> 
> Another problem to solve.. i wish to make a routine which gives me a substring or trimmed down on the following
> conditions that i can start from anypoint in the string untill the offset is reached. so for example
> 
> mytext = "this is a test";
> result = substring(mytext,6,2);
> 
> result would now have to contain the 2nd word "is"...
> 
> thats my goal.. i couldn't figure out a single function for it, if someone knows a solution.. would be great.. 
> 
> or if you know how to "build" a new string, which in my thought has to go like this:
> 
> mytext = "this is a test";
> 
> mytext ++ ( 5 times) to set a pointer somehow to the 5th char in the string.
> 
> subtext = subtext + pointer to mytext
> 
> mytext ++ (1 time) to go to the next char in the string
> 
> subtext = subtext + point to mytext
> 
> which will give me "is" in the subtext...
> 
> 
> 
> I could find decent material while searching the internet..  normaly, in my pas i always had the benefit of functions called substr
> and trimstr but they dont exist as far as i know for cpp.. 
> 
> 
> thanks for any help..
> 
> danny
> 
>