From 2e879cef83189bf50789ea3e3d144738222e828c Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Wed, 6 Jan 2016 14:05:29 -0500
Subject: amgc_list_unit_enums(): initial implementation and integration.

---
 include/apimagic/apimagic.h         |  6 ++++++
 src/apimagic.c                      |  6 ++++++
 src/driver/amgc_driver_ctx.c        |  5 +++++
 src/internal/apimagic_driver_impl.h |  1 +
 src/output/amgc_output_enum.c       | 23 +++++++++++++++++++++++
 src/skin/amgc_skin_default.c        |  4 ++++
 6 files changed, 45 insertions(+)

diff --git a/include/apimagic/apimagic.h b/include/apimagic/apimagic.h
index a7cc472..6762ab2 100644
--- a/include/apimagic/apimagic.h
+++ b/include/apimagic/apimagic.h
@@ -53,6 +53,12 @@ enum amgc_output_action {
 	AMGC_OUTPUT_STRUCT,
 	AMGC_OUTPUT_UNION,
 	AMGC_OUTPUT_FUNCTION,
+	AMGC_LIST_DEFINE,
+	AMGC_LIST_ENUM,
+	AMGC_LIST_TYPEDEF,
+	AMGC_LIST_STRUCT,
+	AMGC_LIST_UNION,
+	AMGC_LIST_FUNCTION,
 };
 
 struct amgc_input {
diff --git a/src/apimagic.c b/src/apimagic.c
index dd0d893..77ae2a2 100644
--- a/src/apimagic.c
+++ b/src/apimagic.c
@@ -32,6 +32,12 @@ static void apimagic_perform_unit_actions(struct amgc_unit_ctx * uctx)
 					(void)0;
 				else
 					amgc_output_unit_enums(uctx,0,stdout);
+
+			case AMGC_LIST_ENUM:
+				if (action->symbol)
+					(void)0;
+				else
+					amgc_list_unit_enums(uctx,0,stdout);
 		}
 }
 
diff --git a/src/driver/amgc_driver_ctx.c b/src/driver/amgc_driver_ctx.c
index c25be55..2b33de4 100644
--- a/src/driver/amgc_driver_ctx.c
+++ b/src/driver/amgc_driver_ctx.c
@@ -197,6 +197,11 @@ int amgc_get_driver_ctx(
 					ctx->actions[nactions].type = AMGC_ACTION_OUTPUT;
 					ctx->actions[nactions++].action = AMGC_OUTPUT_ENUM;
 					break;
+
+				case TAG_LIST_ENUMS:
+					ctx->actions[nactions].type = AMGC_ACTION_OUTPUT;
+					ctx->actions[nactions++].action = AMGC_LIST_ENUM;
+					break;
 			}
 
 	ctx->ctx.program	= program;
diff --git a/src/internal/apimagic_driver_impl.h b/src/internal/apimagic_driver_impl.h
index d070c19..5b599a9 100644
--- a/src/internal/apimagic_driver_impl.h
+++ b/src/internal/apimagic_driver_impl.h
@@ -15,6 +15,7 @@ enum app_tags {
 	TAG_HELP,
 	TAG_VERSION,
 	TAG_PRINT_ENUMS,
+	TAG_LIST_ENUMS,
 	TAG_LANG_STD,
 };
 
diff --git a/src/output/amgc_output_enum.c b/src/output/amgc_output_enum.c
index be399df..3c8288b 100644
--- a/src/output/amgc_output_enum.c
+++ b/src/output/amgc_output_enum.c
@@ -149,3 +149,26 @@ int  amgc_output_unit_enums(
 
 	return 0;
 }
+
+int  amgc_list_unit_enums(
+	const struct amgc_unit_ctx *	uctx,
+	const struct amgc_layout *	layout,
+	FILE *				fout)
+{
+	const struct amgc_entity * aentity;
+
+	if (layout && layout->header && (fputs(layout->header,fout) < 0))
+		return -1;
+
+	for (aentity=uctx->entities->enums; aentity->entity; aentity++)
+		if ((fprintf(fout,"enum %s;\n",
+				aentity->entity && aentity->entity->base.symbol
+				? aentity->entity->base.symbol->string
+				: aentity->altname) < 0))
+			return -1;
+
+	if (layout && layout->footer && (fputs(layout->footer,fout) < 0))
+		return -1;
+
+	return 0;
+}
diff --git a/src/skin/amgc_skin_default.c b/src/skin/amgc_skin_default.c
index 407bad1..8444f66 100644
--- a/src/skin/amgc_skin_default.c
+++ b/src/skin/amgc_skin_default.c
@@ -20,6 +20,10 @@ const struct argv_option amgc_default_options[] = {
 	{"print-enums",	0,TAG_PRINT_ENUMS,ARGV_OPTARG_NONE,0,0,0,
 			"output the translation unit's enums."},
 
+	{"list-enums",	0,TAG_LIST_ENUMS,ARGV_OPTARG_NONE,0,0,0,
+			"output forward declarations for "
+			"the translation unit's enums."},
+
 	{"std",		'\0',TAG_LANG_STD,ARGV_OPTARG_REQUIRED,
 			ARGV_OPTION_HYBRID_EQUAL,AMGC_LANG_STD_PARADIGM,0,
 			"set language standard"},
-- 
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