str_concat.c

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/* string concatenation function */

#include "fb.h"

static __inline__ void fb_hStrConcat
        (
                char *dst,
                const char *str1,
                ssize_t len1,
                const char *str2,
                ssize_t len2
        )
{
    dst = (char *) FB_MEMCPYX( dst, str1, len1 );
    dst = (char *) FB_MEMCPYX( dst, str2, len2 );
        *dst = '\0';
}

FBCALL FBSTRING *fb_StrConcat
        (
                FBSTRING *dst,
                void *str1,
                ssize_t str1_size,
                void *str2,
                ssize_t str2_size
        )
{
        const char *str1_ptr, *str2_ptr;
        ssize_t str1_len, str2_len;

        FB_STRSETUP_FIX( str1, str1_size, str1_ptr, str1_len );

        FB_STRSETUP_FIX( str2, str2_size, str2_ptr, str2_len );

        /* NULL? */
        if( str1_len+str2_len == 0 )
        {
                fb_StrDelete( dst );
        }
        else
        {
                /* alloc temp string */
                dst = fb_hStrAllocTemp( dst, str1_len+str2_len );
                DBG_ASSERT( dst );

                /* do the concatenation */
                fb_hStrConcat( dst->data, str1_ptr, str1_len, str2_ptr, str2_len );
        }

        FB_STRLOCK();

        /* delete temps? */
        if( str1_size == -1 )
                fb_hStrDelTemp_NoLock( (FBSTRING *)str1 );
        if( str2_size == -1 )
                fb_hStrDelTemp_NoLock( (FBSTRING *)str2 );

        FB_STRUNLOCK();

        return dst;
}