Invert nesting of error checking

which reduces nesting levels.

diff --git a/x5/khatus.c b/x5/khatus.c
index 37cbccc..3d81cad 100644 (file)
--- a/x5/khatus.c
+++ b/x5/khatus.c
@@ -167,54 +167,43 @@ void opts_parse_any(Config *, int, char *[], int);  /* For mutually-recursive ca
 void
 parse_opts_opt_i(Config *cfg, int argc, char *argv[], int i)
 {
-       if (i < argc) {
-               char *param = argv[i++];
+       char *param;
 
-               if (is_pos_num(param)) {
-                       cfg->interval = atoi(param);
-                       opts_parse_any(cfg, argc, argv, i);
-               } else {
-                       usage("Option -i parameter is invalid: \"%s\"\n", param);
-               }
-       } else {
+       if (i >= argc)
                usage("Option -i parameter is missing.\n");
-       }
+       param = argv[i++];
+       if (!is_pos_num(param))
+               usage("Option -i parameter is invalid: \"%s\"\n", param);
+       cfg->interval = atoi(param);
+       opts_parse_any(cfg, argc, argv, i);
 }
 
 void
 parse_opts_opt_s(Config *cfg, int argc, char *argv[], int i)
 {
-       if (i < argc) {
-               cfg->separator = calloc((strlen(argv[i]) + 1), sizeof(char));
-               strcpy(cfg->separator, argv[i]);
-               opts_parse_any(cfg, argc, argv, ++i);
-       } else {
+       if (i >= argc)
                usage("Option -s parameter is missing.\n");
-       }
+       cfg->separator = calloc((strlen(argv[i]) + 1), sizeof(char));
+       strcpy(cfg->separator, argv[i]);
+       opts_parse_any(cfg, argc, argv, ++i);
 }
 
 void
 parse_opts_opt_l(Config *cfg, int argc, char *argv[], int i)
 {
+       char *param;
        int log_level;
 
-       if (i < argc) {
-               char *param = argv[i++];
-
-               if (is_pos_num(param)) {
-                       log_level = atoi(param);
-                       if (log_level <= Debug) {
-                               cfg->log_level = log_level;
-                               opts_parse_any(cfg, argc, argv, i);
-                       } else {
-                               usage("Option -l value (%d) exceeds maximum (%d)\n", log_level, Debug);
-                       }
-               } else {
-                       usage("Option -l parameter is invalid: \"%s\"\n", param);
-               }
-       } else {
+       if (i >= argc)
                usage("Option -l parameter is missing.\n");
-       }
+       param = argv[i++];
+       if (!is_pos_num(param))
+               usage("Option -l parameter is invalid: \"%s\"\n", param);
+       log_level = atoi(param);
+       if (log_level > Debug)
+               usage("Option -l value (%d) exceeds maximum (%d)\n", log_level, Debug);
+       cfg->log_level = log_level;
+       opts_parse_any(cfg, argc, argv, i);
 }
 
 void