From 9dd1d2cd003d2567fcd47c8cb54603cc348dec01 Mon Sep 17 00:00:00 2001
From: Thiago de Arruda <tpadilha84@gmail.com>
Date: Fri, 9 May 2014 14:45:18 -0300
Subject: [PATCH] API: Implement buffer switching functions

---
 src/api/vim.c | 24 ++++++++++++++++--------
 src/api/vim.h | 10 ++--------
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/src/api/vim.c b/src/api/vim.c
index c23ac8affd..6b04c4b7a5 100644
--- a/src/api/vim.c
+++ b/src/api/vim.c
@@ -8,6 +8,7 @@
 #include "api/defs.h"
 #include "api/buffer.h"
 #include "../vim.h"
+#include "../buffer.h"
 #include "types.h"
 #include "ascii.h"
 #include "ex_docmd.h"
@@ -184,19 +185,26 @@ int64_t vim_get_buffer_count(void)
   return n;
 }
 
-Buffer vim_get_buffer(int64_t num, Error *err)
-{
-  abort();
-}
-
 Buffer vim_get_current_buffer(void)
 {
-  abort();
+  return curbuf->b_fnum;
 }
 
-void vim_set_current_buffer(Buffer buffer)
+void vim_set_current_buffer(Buffer buffer, Error *err)
 {
-  abort();
+  try_start();
+  if (do_buffer(DOBUF_GOTO, DOBUF_FIRST, FORWARD, buffer, 0) == FAIL) {
+    if (try_end(err)) {
+      return;
+    }
+
+    char msg[256];
+    snprintf(msg, sizeof(msg), "failed to switch to buffer %d", (int)buffer);
+    set_api_error(msg, err);
+    return;
+  }
+
+  try_end(err);
 }
 
 int64_t vim_get_window_count(void)
diff --git a/src/api/vim.h b/src/api/vim.h
index 81aadb2014..e310842e5b 100644
--- a/src/api/vim.h
+++ b/src/api/vim.h
@@ -101,13 +101,6 @@ void vim_err_write(String str);
 /// @return The number of buffers
 int64_t vim_get_buffer_count(void);
 
-/// Gets a buffer by index
-///
-/// @param num The buffer number
-/// @param[out] err Details of an error that may have occurred
-/// @return The buffer handle
-Buffer vim_get_buffer(int64_t num, Error *err);
-
 /// Return the current buffer
 ///
 /// @reqturn The buffer handle
@@ -116,7 +109,8 @@ Buffer vim_get_current_buffer(void);
 /// Sets the current buffer
 ///
 /// @param id The buffer handle
-void vim_set_current_buffer(Buffer buffer);
+/// @param[out] err Details of an error that may have occurred
+void vim_set_current_buffer(Buffer buffer, Error *err);
 
 /// Gets the number of windows
 ///