[PATCH 02/16] Add display_columns() to display in column layout

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Currently it does not do that, just provide the API.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Makefile |    3 ++-
 column.c |   31 +++++++++++++++++++++++++++++++
 column.h |    4 ++++
 3 files changed, 37 insertions(+), 1 deletions(-)
 create mode 100644 column.c

diff --git a/Makefile b/Makefile
index ed9e94b..88e20de 100644
--- a/Makefile
+++ b/Makefile
@@ -575,6 +575,7 @@ LIB_OBJS += branch.o
 LIB_OBJS += bundle.o
 LIB_OBJS += cache-tree.o
 LIB_OBJS += color.o
+LIB_OBJS += column.o
 LIB_OBJS += combine-diff.o
 LIB_OBJS += commit.o
 LIB_OBJS += config.o
@@ -1956,7 +1957,7 @@ builtin/prune.o builtin/reflog.o reachable.o: reachable.h
 builtin/commit.o builtin/revert.o wt-status.o: wt-status.h
 builtin/tar-tree.o archive-tar.o: tar.h
 connect.o transport.o http-backend.o: url.h
-pager.o help.o: column.h
+column.o pager.o help.o: column.h
 http-fetch.o http-walker.o remote-curl.o transport.o walker.o: walker.h
 http.o http-walker.o http-push.o http-fetch.o remote-curl.o: http.h url.h
 
diff --git a/column.c b/column.c
new file mode 100644
index 0000000..c7d9a84
--- /dev/null
+++ b/column.c
@@ -0,0 +1,31 @@
+#include "cache.h"
+#include "column.h"
+#include "string-list.h"
+
+#define MODE(mode) ((mode) & COL_MODE)
+
+/* Display without layout, COL_MODE_PLAIN */
+static void display_plain(const struct string_list *list, const char *indent)
+{
+	int i;
+
+	for (i = 0; i < list->nr; i++)
+		printf("%s%s\n", indent, list->items[i].string);
+}
+
+void display_columns(const struct string_list *list, int mode, int width, int padding, const char *indent)
+{
+	int real_mode = MODE(mode);
+	if (!indent)
+		indent = "";
+	if (width <= 1)
+		real_mode = COL_MODE_PLAIN;
+	switch (real_mode) {
+	case COL_MODE_PLAIN:
+		display_plain(list, indent);
+		break;
+
+	default:
+		die("BUG: invalid mode %d", MODE(mode));
+	}
+}
diff --git a/column.h b/column.h
index 55d8067..da0bf9a 100644
--- a/column.h
+++ b/column.h
@@ -1,6 +1,10 @@
 #ifndef COLUMN_H
 #define COLUMN_H
 
+#define COL_MODE          0x000F
+#define COL_MODE_PLAIN         0   /* Single column */
+
 extern int term_columns(void);
+extern void display_columns(const struct string_list *list, int mode, int width, int padding, const char *indent);
 
 #endif
-- 
1.7.2.2