From 2f6d9257a577559f5a35ea1269584feb7c952844 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Fri, 1 Jan 2016 06:09:25 -0500
Subject: amgc_output_pad_symbol(): initial implementation.

---
 include/apimagic/apimagic.h         |  8 ++++++++
 project/common.mk                   |  1 +
 src/output/amgc_output_pad_symbol.c | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100644 src/output/amgc_output_pad_symbol.c

diff --git a/include/apimagic/apimagic.h b/include/apimagic/apimagic.h
index d7a61ac..ac78b57 100644
--- a/include/apimagic/apimagic.h
+++ b/include/apimagic/apimagic.h
@@ -116,6 +116,13 @@ struct amgc_unit_ctx {
 	int				nerrors;
 };
 
+struct amgc_layout {
+	const char *	header;
+	const char *	footer;
+	int		symwidth;
+	int		tabwidth;
+};
+
 /* driver api */
 amgc_api int  amgc_get_driver_ctx	(const char ** argv, const char ** envp, uint32_t flags, struct amgc_driver_ctx **);
 amgc_api int  amgc_create_driver_ctx	(const struct amgc_common_ctx *, struct amgc_driver_ctx **);
@@ -131,6 +138,7 @@ amgc_api int  amgc_unmap_input		(struct amgc_input *);
 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 *);
 
 /* 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 d54a0f2..318de8b 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_pad_symbol.c \
 	src/skin/amgc_skin_default.c \
 
 APP_SRCS = \
diff --git a/src/output/amgc_output_pad_symbol.c b/src/output/amgc_output_pad_symbol.c
new file mode 100644
index 0000000..ea10204
--- /dev/null
+++ b/src/output/amgc_output_pad_symbol.c
@@ -0,0 +1,35 @@
+/**********************************************************/
+/*  apimagic: cparser-based API normalization utility     */
+/*  Copyright (C) 2015--2016  Z. Gilboa                   */
+/*  Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
+/**********************************************************/
+
+#include <stdio.h>
+#include <string.h>
+
+#include <apimagic/apimagic.h>
+
+int  amgc_output_pad_symbol(
+	const char *			symbol,
+	const struct amgc_layout *	layout,
+	FILE *				fout)
+{
+	int len = (int)(strlen(symbol));
+
+	if (layout->symwidth < 1)
+		return -1;
+
+	if (layout->tabwidth == 0)
+		return fprintf(fout,"%*c",layout->symwidth-len,' ');
+
+	len &= (~(layout->tabwidth-1));
+
+	while (len < layout->symwidth) {
+		if (fputc('\t',fout) < 0)
+			return -1;
+		else
+			len += layout->tabwidth;
+	}
+
+	return 0;
+}
-- 
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