[Linuxptp-devel] [PATCH RFC v4 13/69] config: add methods to set values taken from the command line.

[Richard Cochran]

This patch adds functions that will set and lock a certain value.  The
intended use of these methods is to give command line options priority
over the configuration file.

Signed-off-by: Richard Cochran <richardcoch...@gmail.com>
---
 config.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 config.h | 11 +++++++++++
 2 files changed, 61 insertions(+)

diff --git a/config.c b/config.c
index 2cd2788..aa856ad 100644
--- a/config.c
+++ b/config.c
@@ -1039,3 +1039,53 @@ int config_get_int(struct config *cfg, const char 
*section, const char *option)
        pr_debug("config item %s.%s is %d", section, option, ci->val.i);
        return ci->val.i;
 }
+
+int config_set_double(struct config *cfg, const char *option, double val)
+{
+       struct config_item *ci = config_find_item(cfg, NULL, option);
+
+       if (!ci || ci->type != CFG_TYPE_DOUBLE) {
+               pr_err("bug: config option %s missing or invalid!", option);
+               return -1;
+       }
+       ci->flags |= CFG_ITEM_LOCKED;
+       ci->val.d = val;
+       pr_debug("locked item global.%s as %f", option, ci->val.d);
+       return 0;
+}
+
+int config_set_section_int(struct config *cfg, const char *section,
+                          const char *option, int val)
+{
+       struct config_item *cgi, *dst;
+
+       cgi = config_find_item(cfg, NULL, option);
+       if (!cgi) {
+               pr_err("bug: config option %s missing!", option);
+               return -1;
+       }
+       switch (cgi->type) {
+       case CFG_TYPE_DOUBLE:
+               pr_err("bug: config option %s type mismatch!", option);
+               return -1;
+       case CFG_TYPE_INT:
+               break;
+       }
+       if (!section) {
+               cgi->flags |= CFG_ITEM_LOCKED;
+               cgi->val.i = val;
+               pr_debug("locked item global.%s as %d", option, cgi->val.i);
+               return 0;
+       }
+       /* Create or update this port specific item. */
+       dst = config_section_item(cfg, section, option);
+       if (!dst) {
+               dst = config_item_alloc(cfg, section, option, cgi->type);
+               if (!dst) {
+                       return -1;
+               }
+       }
+       dst->val.i = val;
+       pr_debug("section item %s.%s now %d", section, option, dst->val.i);
+       return 0;
+}
diff --git a/config.h b/config.h
index b200c8c..4538b4e 100644
--- a/config.h
+++ b/config.h
@@ -111,4 +111,15 @@ double config_get_double(struct config *cfg, const char 
*section,
 int config_get_int(struct config *cfg, const char *section,
                   const char *option);
 
+int config_set_double(struct config *cfg, const char *option, double val);
+
+int config_set_section_int(struct config *cfg, const char *section,
+                          const char *option, int val);
+
+static inline int config_set_int(struct config *cfg,
+                                const char *option, int val)
+{
+       return config_set_section_int(cfg, NULL, option, val);
+}
+
 #endif
-- 
2.1.4


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