[Libclc-developers] string function clc_stralloc()

[Hallvard B F. <h.b...@us...>]

Here is a function I've seen with several names: stralloc(), concat(),
pstrcat().  I prefer clc_str<someting>.


This code is written by Hallvard Furuseth and put in the public domain.
Insert any copyright you want.

NAME
    clc_stralloc - allocate a concatenation of strings

SYNOPSYS
    #include "clc_string.h"
    char *clc_stralloc(const char *arg1, ...);

DESCRIPTION
    This function takes a number of string arguments followed by
    (char*)0.  It returns a malloced concatenation of the arguments,
    or NULL if space could not be allocated.


#include <stdlib.h>
#include <stdarg.h>
#include "clc_string.h"

char *
clc_stralloc(const char *arg1, ...)
{
    size_t len;
    const char *arg;
    char *ret, *end;
    va_list ap;

    len = 1;
    va_start(ap, arg1);
    for (arg = arg1; arg != NULL; arg = va_arg(ap, const char *))
	len += strlen(arg);
    va_end(ap);

    ret = malloc(len);
    if (ret != NULL) {
	end = ret;
	*end = '\0';
	va_start(ap, arg1);
	for (arg = arg1; arg != NULL; arg = va_arg(ap, const char *))
	    end = clc_stpcpy(end, arg);
	va_end(ap);
    }
    return ret;
}

-- 
Hallvard