set_initial_step(opt, NULL) resets to default

darcs-hash:20100614204237-c8de0-cd7a3a4bdbbd4d67c592fd103779f3a97aa51fc8.gz

diff --git a/api/options.c b/api/options.c
index 5b808106ee326f6106727a9ab3ad2dd0ca2be7d4..40e47917ff6dd586e043a144518622ec1ae555f4 100644 (file)
--- a/api/options.c
+++ b/api/options.c
@@ -486,7 +486,11 @@ nlopt_result nlopt_set_initial_step1(nlopt_opt opt, double dx)
 nlopt_result nlopt_set_initial_step(nlopt_opt opt, const double *dx)
 {
      unsigned i;
-     if (!opt || !dx) return NLOPT_INVALID_ARGS;
+     if (!opt) return NLOPT_INVALID_ARGS;
+     if (!dx) {
+         free(opt->dx); opt->dx = NULL;
+         return NLOPT_SUCCESS;
+     }
      for (i = 0; i < opt->n; ++i) if (dx[i] == 0) return NLOPT_INVALID_ARGS;
      if (!opt->dx && nlopt_set_initial_step1(opt, 1) == NLOPT_OUT_OF_MEMORY)
           return NLOPT_OUT_OF_MEMORY;