[SR-Dev] git:andrei/switch: expr engine: minor additions

Module: sip-router Branch: andrei/switch Commit: 2d6686519542ee12bedbe085500ed3cd6f87f280 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=2d66865… Author: Andrei Pelinescu-Onciul <andrei(a)iptel.org> Committer: Andrei Pelinescu-Onciul <andrei(a)iptel.org> Date: Wed Feb 4 19:20:53 2009 +0100 expr engine: minor additions - added rve_has_side_effects(), preliminary version (for now is equivalent with !rve_is_constant()) - exported rve_destroy() --- rvalue.c | 11 +++++++++++ rvalue.h | 4 ++++ 2 files changed, 15 insertions(+), 0 deletions(-) diff --git a/rvalue.c b/rvalue.c index 9e020ef..4c7472d 100644 --- a/rvalue.c +++ b/rvalue.c @@ -452,6 +452,17 @@ int rve_is_constant(struct rval_expr* rve) +/** returns true if the expression has side-effects. + * @return 1 for possible side-effects, 0 for no side-effects + * TODO: add better checks + */ +int rve_has_side_effects(struct rval_expr* rve) +{ + return !rve_is_constant(rve); +} + + + /** returns true if operator is unary (takes only 1 arg). * @return 0 or 1 on */ diff --git a/rvalue.h b/rvalue.h index a694c0d..88fd6f2 100644 --- a/rvalue.h +++ b/rvalue.h @@ -188,6 +188,8 @@ int rval_expr_eval_rvint( struct run_act_ctx* h, struct sip_msg* msg, enum rval_type rve_guess_type(struct rval_expr* rve); /** returns true if expression is constant. */ int rve_is_constant(struct rval_expr* rve); +/** returns true if the expression can have side-effect */ +int rve_has_side_effects(struct rval_expr* rve); /** returns 1 if expression is valid (type-wise).*/ int rve_check_type(enum rval_type* type, struct rval_expr* rve, struct rval_expr** bad_rve, enum rval_type* bad_type, @@ -206,6 +208,8 @@ struct rval_expr* mk_rval_expr1(enum rval_expr_op op, struct rval_expr* rve1, struct rval_expr* mk_rval_expr2(enum rval_expr_op op, struct rval_expr* rve1, struct rval_expr* rve2, struct cfg_pos* pos); +/** destroys a pkg_malloc'ed rve. */ +void rve_destroy(struct rval_expr* rve); /** fix a rval_expr. */ int fix_rval_expr(void** p);