apr_strings.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

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#include "apr.h"
#include "apr_strings.h"
#include "apr_private.h"
#include "apr_lib.h"
#ifdef HAVE_STDDEF_H
#include <stddef.h> /* NULL */
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_STRINGS_H
#include <strings.h>
#endif

APR_DECLARE(char *) apr_pstrdup(apr_pool_t *a, const char *s)
{
    char *res;
    size_t len;

    if (s == NULL) {
        return NULL;
    }
    len = strlen(s) + 1;
    res = apr_palloc(a, len);
    memcpy(res, s, len);
    return res;
}

APR_DECLARE(char *) apr_pstrndup(apr_pool_t *a, const char *s, apr_size_t n)
{
    char *res;
    apr_size_t len;

    if (s == NULL) {
        return NULL;
    }
    len = strlen(s);
    if (len < n)
        n = len;
    res = apr_palloc(a, n + 1);
    memcpy(res, s, n);
    res[n] = '\0';
    return res;
}

APR_DECLARE(void *) apr_pmemdup(apr_pool_t *a, const void *m, apr_size_t n)
{
    void *res;

    if (m == NULL)
	return NULL;
    res = apr_palloc(a, n);
    memcpy(res, m, n);
    return res;
}

APR_DECLARE_NONSTD(char *) apr_pstrcat(apr_pool_t *a, ...)
{
    char *cp, *argp, *res;

    /* Pass one --- find length of required string */

    apr_size_t len = 0;
    va_list adummy;

    va_start(adummy, a);

    while ((cp = va_arg(adummy, char *)) != NULL) {
        len += strlen(cp);
    }

    va_end(adummy);

    /* Allocate the required string */

    res = (char *) apr_palloc(a, len + 1);
    cp = res;
    *cp = '\0';

    /* Pass two --- copy the argument strings into the result space */

    va_start(adummy, a);

    while ((argp = va_arg(adummy, char *)) != NULL) {
        strcpy(cp, argp);
        cp += strlen(argp);
    }

    va_end(adummy);

    /* Return the result string */

    return res;
}