[Linuxptp-devel] [PATCH RFC V5 62/83] config: add support for enumerated types with string labels.

[Richard Cochran]

Signed-off-by: Richard Cochran <richardcoch...@gmail.com>
---
 config.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/config.c b/config.c
index 3f4014c..2e975d5 100644
--- a/config.c
+++ b/config.c
@@ -37,6 +37,12 @@ enum config_section {
 enum config_type {
        CFG_TYPE_INT,
        CFG_TYPE_DOUBLE,
+       CFG_TYPE_ENUM,
+};
+
+struct config_enum {
+       const char *label;
+       int value;
 };
 
 typedef union {
@@ -53,6 +59,7 @@ typedef union {
 struct config_item {
        char label[CONFIG_LABEL_SIZE];
        enum config_type type;
+       struct config_enum *tab;
        unsigned int flags;
        any_t val;
        any_t min;
@@ -69,6 +76,13 @@ struct config_item {
        .min.d  = _min,                                 \
        .max.d  = _max,                                 \
 }
+#define CONFIG_ITEM_ENUM(_label, _port, _default, _table) { \
+       .label  = _label,                               \
+       .type   = CFG_TYPE_ENUM,                        \
+       .flags  = _port ? CFG_ITEM_PORT : 0,            \
+       .tab    = _table,                               \
+       .val.i  = _default,                             \
+}
 #define CONFIG_ITEM_INT(_label, _port, _default, _min, _max) { \
        .label  = _label,                               \
        .type   = CFG_TYPE_INT,                         \
@@ -81,12 +95,18 @@ struct config_item {
 #define GLOB_ITEM_DBL(label, _default, min, max) \
        CONFIG_ITEM_DBL(label, 0, _default, min, max)
 
+#define GLOB_ITEM_ENU(label, _default, table) \
+       CONFIG_ITEM_ENUM(label, 0, _default, table)
+
 #define GLOB_ITEM_INT(label, _default, min, max) \
        CONFIG_ITEM_INT(label, 0, _default, min, max)
 
 #define PORT_ITEM_DBL(label, _default, min, max) \
        CONFIG_ITEM_DBL(label, 1, _default, min, max)
 
+#define PORT_ITEM_ENU(label, _default, table) \
+       CONFIG_ITEM_ENUM(label, 1, _default, table)
+
 #define PORT_ITEM_INT(label, _default, min, max) \
        CONFIG_ITEM_INT(label, 1, _default, min, max)
 
@@ -233,8 +253,9 @@ static enum parser_result parse_item(struct config *cfg,
                                     const char *option,
                                     const char *value)
 {
-       struct config_item *cgi, *dst;
        enum parser_result r = BAD_VALUE;
+       struct config_item *cgi, *dst;
+       struct config_enum *cte;
        double df;
        int val;
 
@@ -251,6 +272,14 @@ static enum parser_result parse_item(struct config *cfg,
        case CFG_TYPE_DOUBLE:
                r = get_ranged_double(value, &df, cgi->min.d, cgi->max.d);
                break;
+       case CFG_TYPE_ENUM:
+               for (cte = cgi->tab; cte->label; cte++) {
+                       if (!strcasecmp(cte->label, value)) {
+                               val = cte->value;
+                               r = PARSED_OK;
+                               break;
+                       }
+               }
        }
        if (r != PARSED_OK) {
                return r;
@@ -278,6 +307,7 @@ static enum parser_result parse_item(struct config *cfg,
 
        switch (dst->type) {
        case CFG_TYPE_INT:
+       case CFG_TYPE_ENUM:
                dst->val.i = val;
                break;
        case CFG_TYPE_DOUBLE:
@@ -770,6 +800,7 @@ int config_get_int(struct config *cfg, const char *section, 
const char *option)
                pr_err("bug: config option %s type mismatch!", option);
                exit(-1);
        case CFG_TYPE_INT:
+       case CFG_TYPE_ENUM:
                break;
        }
        pr_debug("config item %s.%s is %d", section, option, ci->val.i);
@@ -805,6 +836,7 @@ int config_set_section_int(struct config *cfg, const char 
*section,
                pr_err("bug: config option %s type mismatch!", option);
                return -1;
        case CFG_TYPE_INT:
+       case CFG_TYPE_ENUM:
                break;
        }
        if (!section) {
-- 
2.1.4


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