cli: make it possible to extend option types

Make it possible to extend options with custom value parsers by embeding
`struct cli_opt` into a custom struct and setting the `set()` "method".

1 files changed, 16 insertions, 59 deletions

diff --git a/cli/cli-example.c b/cli/cli-example.c
index 8149be0..941ddd6 100644
--- a/cli/cli-example.c
+++ b/cli/cli-example.c
@@ -3,67 +3,33 @@
  */
 #include "cli.h"
 
-long		  distance;
-unsigned long time;
-long		  speed;
+CLI_OPT_LONG(distance, 'd', "distance", "the distance (km/miles)");
+CLI_OPT_LONG(speed, 's', "speed", "the speed ((km/miles)ph)");
+CLI_OPT_LONG(time, 't', "time", "the time (seconds)");
+CLI_OPT_FLAG(murica, 'M', "murica", "Use American™ measurements");
 
-bool murica;
-
-int calc_speed(const struct cli_ctx *ctx)
+int calc_speed(const struct cli_cmd *, const struct cli_ctx *)
 {
-	if (time == 0) {
+	if (time.value == 0) {
 		fprintf(stderr, "time cannot be zero\n");
 		return CLI_RC_BAD_ARGS;
 	}
-	double speed = (double)distance / ((double)time / 3600);
-	printf("%lf%s\n", speed, murica ? "mph" : "km/h");
+	double speed = (double)distance.value / ((double)time.value / 3600);
+	printf("%lf%s\n", speed, murica.value ? "mph" : "km/h");
 
 	return CLI_RC_OK;
 }
 
-int calc_distance(const struct cli_ctx *ctx)
+int calc_distance(const struct cli_cmd *, const struct cli_ctx *)
 {
-	double distance = speed * ((double)time / 3600);
-	printf("%lf%s\n", distance, murica ? "miles" : "km");
+	double distance = speed.value * ((double)time.value / 3600);
+	printf("%lf%s\n", distance, murica.value ? "miles" : "km");
 
 	return CLI_RC_OK;
 }
 
-const struct cli_opt speed_opts[] = {
-	{
-		.type	 = CLI_OT_INT,
-		.shor	 = 'd',
-		.lon	 = "distance",
-		.desc	 = "the distance (km/miles)",
-		.value.i = &distance,
-	},
-	{
-		.type	 = CLI_OT_UINT,
-		.shor	 = 't',
-		.lon	 = "time",
-		.desc	 = "the time (seconds)",
-		.value.u = &time,
-	},
-	{0},
-};
-
-const struct cli_opt distance_opts[] = {
-	{
-		.type	 = CLI_OT_INT,
-		.shor	 = 's',
-		.lon	 = "speed",
-		.desc	 = "the speed ((km/miles)ph)",
-		.value.i = &speed,
-	},
-	{
-		.type	 = CLI_OT_UINT,
-		.shor	 = 't',
-		.lon	 = "time",
-		.desc	 = "the time (seconds)",
-		.value.u = &time,
-	},
-	{0},
-};
+struct cli_opt *speed_opts[]	= {&distance.opt, &time.opt, NULL};
+struct cli_opt *distance_opts[] = {&speed.opt, &time.opt, NULL};
 
 const struct cli_cmd my_cmds[] = {
 	{
@@ -72,7 +38,7 @@ const struct cli_cmd my_cmds[] = {
 		.help =
 			"Tell me the distance and the time, and I'll tell you your speed",
 		.opts = speed_opts,
-		.func = calc_speed,
+		.run  = calc_speed,
 	},
 	{
 		.name = "distance",
@@ -80,21 +46,12 @@ const struct cli_cmd my_cmds[] = {
 		.help =
 			"Tell me the speed and the time, and I'll tell you your distance",
 		.opts = distance_opts,
-		.func = calc_distance,
+		.run  = calc_distance,
 	},
 	{0},
 };
 
-struct cli_opt global_opts[] = {
-	{
-		.type	 = CLI_OT_FLAG,
-		.shor	 = 'M',
-		.lon	 = "murica",
-		.desc	 = "Use American™ measurements",
-		.value.f = &murica,
-	},
-	{0},
-};
+struct cli_opt *global_opts[] = {&murica.opt, NULL};
 
 struct cli my_cli = {
 	.header = "This is an example CLI program",