From c4a105a804c25415eaf79588b38a5d7fc8e75d70 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Thu, 31 Dec 2015 20:35:26 -0500
Subject: amgc_get_enum_members(): initial implementation.

---
 include/apimagic/apimagic.h   |   3 ++
 project/common.mk             |   1 +
 src/logic/amgc_enum_members.c | 105 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 src/logic/amgc_enum_members.c

diff --git a/include/apimagic/apimagic.h b/include/apimagic/apimagic.h
index 81d8036..d7a61ac 100644
--- a/include/apimagic/apimagic.h
+++ b/include/apimagic/apimagic.h
@@ -138,6 +138,9 @@ amgc_api int  amgc_init_unit_meta	(const struct amgc_unit_ctx *, struct amgc_uni
 amgc_api int  amgc_get_unit_entities	(const struct amgc_unit_ctx *, struct amgc_unit_meta *, struct amgc_unit_entities **);
 amgc_api void amgc_free_unit_entities	(struct amgc_unit_entities *);
 
+amgc_api int  amgc_get_enum_members	(const struct amgc_unit_ctx *, const union entity_t *, struct amgc_entity **);
+amgc_api void amgc_free_enum_members	(struct amgc_entity *);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/project/common.mk b/project/common.mk
index 1945a6a..d54a0f2 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -2,6 +2,7 @@ COMMON_SRCS = \
 	src/driver/amgc_driver_ctx.c \
 	src/driver/amgc_paradigm_meta.c \
 	src/driver/amgc_unit_ctx.c \
+	src/logic/amgc_enum_members.c \
 	src/logic/amgc_init_unit_meta.c \
 	src/logic/amgc_map_input.c \
 	src/logic/amgc_unit_entities.c \
diff --git a/src/logic/amgc_enum_members.c b/src/logic/amgc_enum_members.c
new file mode 100644
index 0000000..321303f
--- /dev/null
+++ b/src/logic/amgc_enum_members.c
@@ -0,0 +1,105 @@
+/**********************************************************/
+/*  apimagic: cparser-based API normalization utility     */
+/*  Copyright (C) 2015--2016  Z. Gilboa                   */
+/*  Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
+/**********************************************************/
+
+#include <cparser/ast/ast_t.h>
+#include <cparser/ast/entity_t.h>
+#include <cparser/ast/symbol_t.h>
+
+#include <apimagic/apimagic.h>
+
+static const struct amgc_entity * enumval_vector_entity(
+	const struct amgc_unit_ctx *	uctx,
+	const union entity_t *		entity)
+{
+	const struct amgc_entity * aentity;
+
+	aentity = uctx->entities->enumvals;
+
+	for (; aentity->entity; aentity++)
+		if (aentity->entity == entity)
+			return aentity;
+
+	return 0;
+}
+
+static int enumval_cmp(const void * ptra, const void * ptrb)
+{
+	struct amgc_entity * entitya = (struct amgc_entity *)ptra;
+	struct amgc_entity * entityb = (struct amgc_entity *)ptrb;
+
+	if (entitya->enumval == entityb->enumval)
+		return (strcmp(
+				entitya->altname
+					? entitya->altname
+					: entitya->entity->base.symbol->string,
+				entityb->altname
+					? entityb->altname
+					: entityb->entity->base.symbol->string));
+	else if ((entitya->enumval <= -128) && (entityb->enumval >= 0))
+		return 1;
+	else if ((entityb->enumval <= -128) && (entitya->enumval >= 0))
+		return -1;
+	else if ((entitya->enumval < entityb->enumval) && (entitya->enumval > -128) && (entityb->enumval > -128))
+		return -1;
+	else
+		return 1;
+}
+
+amgc_api int amgc_get_enum_members(
+	const struct amgc_unit_ctx *	uctx,
+	const union entity_t *		penum,
+	struct amgc_entity **		pmembers)
+{
+	int				nmembers;
+	struct amgc_entity *		buffer;
+	struct amgc_entity *		pentity;
+	const struct amgc_entity *	aentity;
+	const union entity_t *		entity;
+
+	if (penum->base.kind != ENTITY_ENUM)
+		return -1;
+
+	entity	= penum->enume.first_value;
+	nmembers= 0;
+
+	for (; entity && (entity->base.kind == ENTITY_ENUM_VALUE); ) {
+		if (!(aentity = enumval_vector_entity(uctx,entity)))
+			return -1;
+
+		if (!aentity->fexclude)
+			nmembers++;
+
+		entity = entity->base.next;
+	}
+
+	/* use first element as a guard */
+	if (!(buffer = calloc(1+nmembers+1,sizeof(*buffer))))
+		return -1;
+
+	pentity = &buffer[1];
+	entity	= penum->enume.first_value;
+
+	for (; entity && (entity->base.kind == ENTITY_ENUM_VALUE); ) {
+		aentity = enumval_vector_entity(uctx,entity);
+
+		if (!aentity->fexclude)
+			memcpy(pentity++,aentity,sizeof(*pentity));
+
+		entity = entity->base.next;
+	}
+
+	*pmembers = &buffer[1];
+	qsort(*pmembers,nmembers,sizeof(struct amgc_entity),enumval_cmp);
+
+	return 0;
+}
+
+amgc_api void amgc_free_enum_members(struct amgc_entity * members)
+{
+	/* first element is a guard */
+	if (members)
+		free(--members);
+}
-- 
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