str_ltrim.c

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/* ltrim$ function */

#include "fb.h"

FBCALL FBSTRING *fb_LTRIM( FBSTRING *src )
{
        FBSTRING *dst;
        ssize_t len;
        char *src_ptr = NULL;

        if( src == NULL )
                return &__fb_ctx.null_desc;

        FB_STRLOCK();

        if( src->data != NULL )
        {
                src_ptr = fb_hStrSkipChar( src->data, FB_STRSIZE( src ), 32 );
                len = FB_STRSIZE( src ) - (ssize_t)(src_ptr - src->data);
        }
        else
                len = 0;

        if( len > 0 )
        {
                /* alloc temp string */
        dst = fb_hStrAllocTemp_NoLock( NULL, len );
                if( dst != NULL )
                {
                        /* simple copy */
                        fb_hStrCopy( dst->data, src_ptr, len );
                }
                else
                        dst = &__fb_ctx.null_desc;
    }
        else
                dst = &__fb_ctx.null_desc;

        /* del if temp */
        fb_hStrDelTemp_NoLock( src );

        FB_STRUNLOCK();

        return dst;
}