+int
+modify_increment_values(
+ Entry *e,
+ Modification *mod,
+ int permissive,
+ const char **text,
+ char *textbuf, size_t textlen )
+{
+ Attribute *a;
+
+ a = attr_find( e->e_attrs, mod->sm_desc );
+ if( a == NULL ) {
+ if ( permissive ) {
+ Modification modReplace = *mod;
+
+ modReplace.sm_op = LDAP_MOD_REPLACE;
+
+ return modify_add_values(e, &modReplace, permissive, text, textbuf, textlen);
+ } else {
+ *text = textbuf;
+ snprintf( textbuf, textlen,
+ "modify/increment: %s: no such attribute",
+ mod->sm_desc->ad_cname.bv_val );
+ return LDAP_NO_SUCH_ATTRIBUTE;
+ }
+ }
+
+ if ( !strcmp( a->a_desc->ad_type->sat_syntax_oid, SLAPD_INTEGER_SYNTAX )) {
+ int i;
+ char str[sizeof(long)*3 + 2]; /* overly long */
+ long incr;
+
+ if ( lutil_atol( &incr, mod->sm_values[0].bv_val ) != 0 ) {
+ *text = "modify/increment: invalid syntax of increment";
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ /* treat zero and errors as a no-op */
+ if( incr == 0 ) {
+ return LDAP_SUCCESS;
+ }
+
+ for( i = 0; !BER_BVISNULL( &a->a_nvals[i] ); i++ ) {
+ char *tmp;
+ long value;
+ size_t strln;
+ if ( lutil_atol( &value, a->a_nvals[i].bv_val ) != 0 ) {
+ *text = "modify/increment: invalid syntax of original value";
+ return LDAP_INVALID_SYNTAX;
+ }
+ strln = snprintf( str, sizeof(str), "%ld", value+incr );
+
+ tmp = SLAP_REALLOC( a->a_nvals[i].bv_val, strln+1 );
+ if( tmp == NULL ) {
+ *text = "modify/increment: reallocation error";
+ return LDAP_OTHER;
+ }
+ a->a_nvals[i].bv_val = tmp;
+ a->a_nvals[i].bv_len = strln;
+
+ AC_MEMCPY( a->a_nvals[i].bv_val, str, strln+1 );
+ }
+
+ } else {
+ snprintf( textbuf, textlen,
+ "modify/increment: %s: increment not supported for value syntax %s",
+ mod->sm_desc->ad_cname.bv_val,
+ a->a_desc->ad_type->sat_syntax_oid );
+ return LDAP_CONSTRAINT_VIOLATION;
+ }
+
+ return LDAP_SUCCESS;
+}
+