From 7b509c9eb9cabc55216b156711b599799eefff1e Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Fri, 1 Jan 2016 06:11:10 -0500
Subject: amgc_output_enum(): initial implementation.

---
 include/apimagic/apimagic.h         |   2 +
 project/common.mk                   |   1 +
 src/internal/apimagic_driver_impl.h |   4 ++
 src/output/amgc_output_enum.c       | 126 ++++++++++++++++++++++++++++++++++++
 4 files changed, 133 insertions(+)
 create mode 100644 src/output/amgc_output_enum.c

diff --git a/include/apimagic/apimagic.h b/include/apimagic/apimagic.h
index ac78b57..f1bec42 100644
--- a/include/apimagic/apimagic.h
+++ b/include/apimagic/apimagic.h
@@ -139,6 +139,8 @@ amgc_api int  amgc_lang_std_from_string	(const char * std);
 
 /* utility api */
 amgc_api int  amgc_output_pad_symbol	(const char *, const struct amgc_layout *, FILE *);
+amgc_api int  amgc_output_unit_enum	(const struct amgc_unit_ctx *, const union entity_t *, const struct amgc_layout *, FILE *);
+amgc_api int  amgc_output_custom_enum	(const struct amgc_entity *, const struct amgc_entity[], const struct amgc_layout *, FILE *);
 
 /* low-level api */
 amgc_api int  amgc_init_unit_meta	(const struct amgc_unit_ctx *, struct amgc_unit_meta *);
diff --git a/project/common.mk b/project/common.mk
index 318de8b..1f75489 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -6,6 +6,7 @@ COMMON_SRCS = \
 	src/logic/amgc_init_unit_meta.c \
 	src/logic/amgc_map_input.c \
 	src/logic/amgc_unit_entities.c \
+	src/output/amgc_output_enum.c \
 	src/output/amgc_output_pad_symbol.c \
 	src/skin/amgc_skin_default.c \
 
diff --git a/src/internal/apimagic_driver_impl.h b/src/internal/apimagic_driver_impl.h
index 659597d..be747aa 100644
--- a/src/internal/apimagic_driver_impl.h
+++ b/src/internal/apimagic_driver_impl.h
@@ -7,6 +7,10 @@
 
 #include <apimagic/apimagic.h>
 
+#ifndef AMGC_TAB_WIDTH
+#define AMGC_TAB_WIDTH	8
+#endif
+
 enum app_tags {
 	TAG_HELP,
 	TAG_VERSION,
diff --git a/src/output/amgc_output_enum.c b/src/output/amgc_output_enum.c
new file mode 100644
index 0000000..0a15728
--- /dev/null
+++ b/src/output/amgc_output_enum.c
@@ -0,0 +1,126 @@
+/**********************************************************/
+/*  apimagic: cparser-based API normalization utility     */
+/*  Copyright (C) 2015--2016  Z. Gilboa                   */
+/*  Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
+/**********************************************************/
+
+#include <stdio.h>
+
+#include <cparser/ast/ast_t.h>
+#include <cparser/ast/entity_t.h>
+#include <cparser/ast/symbol_t.h>
+
+#include <apimagic/apimagic.h>
+#include "apimagic_driver_impl.h"
+
+static int output_enum(
+	const char *			symbol,
+	const struct amgc_entity	enumvals[],
+	const struct amgc_layout *	layout,
+	FILE *				fout)
+{
+	const struct amgc_entity *	enumval;
+	struct amgc_layout		elayout;
+	size_t				len;
+
+	if (!layout || !layout->symwidth) {
+		if (!layout)
+			memset(&elayout,0,sizeof(elayout));
+		else
+			memcpy(&elayout,layout,sizeof(elayout));
+
+		if (!elayout.tabwidth)
+			elayout.tabwidth = AMGC_TAB_WIDTH;
+
+		layout  = &elayout;
+		enumval = enumvals;
+
+		for (; enumval->entity || enumval->altname; enumval++) {
+			len = strlen(enumval->altname
+				? enumval->altname
+				: enumval->entity->base.symbol->string);
+
+			if (len > elayout.symwidth)
+				elayout.symwidth = len;
+		}
+	}
+
+	if (layout->header && (fputs(layout->header,fout) < 0))
+		return -1;
+
+	if (fprintf(fout,"enum %s {\n",symbol) < 0)
+		return -1;
+
+	for (enumval=enumvals; enumval->entity || enumval->altname; enumval++) {
+		symbol = enumval->altname
+			? enumval->altname
+			: enumval->entity->base.symbol->string;
+
+		if (fprintf(fout,"\t%s",symbol) < 0)
+			return -1;
+
+		if (amgc_output_pad_symbol(symbol,layout,fout) < 0)
+			return -1;
+
+		if ((enumval->enumval < 0) && (enumval->enumval > -128))
+			fprintf(fout,"= (%d)",enumval->enumval);
+		else if ((enumval->enumval >= 0) && (enumval->enumval < 2048))
+			fprintf(fout,"= %d",enumval->enumval);
+		else
+			fprintf(fout,"= 0x%08x",enumval->enumval);
+
+		if (fputs(",\n",fout) < 0)
+			return -1;
+	}
+
+	if (fputs("};\n",fout) < 0)
+		return -1;
+
+	if (layout->footer && (fputs(layout->footer,fout) < 0))
+		return -1;
+
+	return 0;
+}
+
+int amgc_output_unit_enum(
+	const struct amgc_unit_ctx *	uctx,
+	const union entity_t *		entity,
+	const struct amgc_layout *	layout,
+	FILE *				fout)
+{
+	struct amgc_entity *	enumvals;
+	int			ret;
+
+	if (entity->base.kind != ENTITY_ENUM)
+		return -1;
+	else if (amgc_get_enum_members(uctx,entity,&enumvals))
+		return -1;
+
+	ret = output_enum(entity->base.symbol->string,enumvals,layout,fout);
+	amgc_free_enum_members(enumvals);
+
+	return ret;
+}
+
+int amgc_output_custom_enum(
+	const struct amgc_entity *	penum,
+	const struct amgc_entity	enumvals[],
+	const struct amgc_layout *	layout,
+	FILE *				fout)
+{
+	const struct amgc_entity * aentity;
+
+	if (penum->entity && penum->entity->base.kind != ENTITY_ENUM)
+		return -1;
+	else if (!penum->entity && !penum->altname)
+		return -1;
+
+	for (aentity=enumvals; aentity->entity || aentity->altname; aentity++)
+		if (aentity->entity && aentity->entity->base.kind != ENTITY_ENUM_VALUE)
+			return -1;
+
+	return output_enum(penum->entity
+				? penum->entity->base.symbol->string
+				: penum->altname,
+			enumvals,layout,fout);
+}
-- 
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