[git commit master] consolidate ESC sequences

Denys Vlasenko vda.linux at googlemail.com
Sun May 16 21:42:13 UTC 2010


commit: http://git.busybox.net/busybox/commit/?id=d9a3e89f501800c3e7c779b7e9545a5c80134593
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master

function                                             old     new   delta
bell                                                   2       -      -2
CMdown                                                 2       -      -2
Ceos                                                   4       -      -4
Ceol                                                   4       -      -4
CMup                                                   4       -      -4
SOs                                                    5       -      -5
SOn                                                    5       -      -5
CMrc                                                   9       -      -9

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 console-tools/clear.c |    3 ++-
 console-tools/reset.c |   10 +++++-----
 editors/vi.c          |   16 ++++++++--------
 libbb/lineedit.c      |    2 +-
 miscutils/fbsplash.c  |    4 ++--
 miscutils/less.c      |   10 +++++-----
 procps/top.c          |    8 ++++----
 procps/watch.c        |    3 ++-
 8 files changed, 29 insertions(+), 27 deletions(-)

diff --git a/console-tools/clear.c b/console-tools/clear.c
index 8b727b3..b0c6d65 100644
--- a/console-tools/clear.c
+++ b/console-tools/clear.c
@@ -15,5 +15,6 @@
 int clear_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int clear_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 {
-	return printf("\033[H\033[J") != 6;
+	/* home; clear to the end of screen */
+	return printf("\033[H""\033[J") != 6;
 }
diff --git a/console-tools/reset.c b/console-tools/reset.c
index 6917eda..f0ea5cb 100644
--- a/console-tools/reset.c
+++ b/console-tools/reset.c
@@ -28,11 +28,11 @@ int reset_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 
 	if (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) {
 		/* See 'man 4 console_codes' for details:
-		 * "ESC c"			-- Reset
-		 * "ESC ( K"		-- Select user mapping
-		 * "ESC [ J"		-- Erase display
-		 * "ESC [ 0 m"		-- Reset all display attributes
-		 * "ESC [ ? 25 h"	-- Make cursor visible.
+		 * "ESC c"        -- Reset
+		 * "ESC ( K"      -- Select user mapping
+		 * "ESC [ J"      -- Erase to the end of screen
+		 * "ESC [ 0 m"    -- Reset all display attributes
+		 * "ESC [ ? 25 h" -- Make cursor visible
 		 */
 		printf("\033c\033(K\033[J\033[0m\033[?25h");
 		/* http://bugs.busybox.net/view.php?id=1414:
diff --git a/editors/vi.c b/editors/vi.c
index b8cacb4..d9124fd 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -60,18 +60,18 @@ enum {
 
 /* vt102 typical ESC sequence */
 /* terminal standout start/normal ESC sequence */
-static const char SOs[] ALIGN1 = "\033[7m";
-static const char SOn[] ALIGN1 = "\033[0m";
+#define SOs "\033[7m"
+#define SOn "\033[0m"
 /* terminal bell sequence */
-static const char bell[] ALIGN1 = "\007";
+#define bell "\007"
 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
-static const char Ceol[] ALIGN1 = "\033[K";
-static const char Ceos[] ALIGN1 = "\033[J";
+#define Ceol "\033[K"
+#define Ceos "\033[J"
 /* Cursor motion arbitrary destination ESC sequence */
-static const char CMrc[] ALIGN1 = "\033[%d;%dH";
+#define CMrc "\033[%u;%uH"
 /* Cursor motion up and down ESC sequence */
-static const char CMup[] ALIGN1 = "\033[A";
-static const char CMdown[] ALIGN1 = "\n";
+#define CMup "\033[A"
+#define CMdown "\n"
 
 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
 // cmds modifying text[]
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 72a1786..bc089ab 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -466,7 +466,7 @@ static void input_backward(unsigned num)
 		cmdedit_x = w * count_y - num;
 	}
 	/* go to 1st column; go up; go to correct column */
-	printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x);
+	printf("\r" "\033[%uA" "\033[%uC", count_y, cmdedit_x);
 }
 
 static void put_prompt(void)
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index 5974006..e370d20 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -359,7 +359,7 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
 
 	if (fifo_filename && bCursorOff) {
 		// hide cursor (BEFORE any fb ops)
-		full_write(STDOUT_FILENO, "\x1b" "[?25l", 6);
+		full_write(STDOUT_FILENO, "\033[?25l", 6);
 	}
 
 	fb_drawimage();
@@ -404,7 +404,7 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
 	}
 
 	if (bCursorOff) // restore cursor
-		full_write(STDOUT_FILENO, "\x1b" "[?25h", 6);
+		full_write(STDOUT_FILENO, "\033[?25h", 6);
 
 	return EXIT_SUCCESS;
 }
diff --git a/miscutils/less.c b/miscutils/less.c
index e4f8ab9..8482662 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -29,11 +29,11 @@
 #endif
 
 /* The escape codes for highlighted and normal text */
-#define HIGHLIGHT "\033[7m"
-#define NORMAL "\033[0m"
-/* The escape code to clear the screen */
-#define CLEAR "\033[H\033[J"
-/* The escape code to clear to end of line */
+#define HIGHLIGHT   "\033[7m"
+#define NORMAL      "\033[0m"
+/* The escape code to home and clear to the end of screen */
+#define CLEAR       "\033[H\033[J"
+/* The escape code to clear to the end of line */
 #define CLEAR_2_EOL "\033[K"
 
 enum {
diff --git a/procps/top.c b/procps/top.c
index f5c0a12..e4afafc 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -478,8 +478,8 @@ static unsigned long display_header(int scr_width, int *lines_rem_p)
 	snprintf(scrbuf, scr_width,
 		"Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
 		used, mfree, shared, buffers, cached);
-	/* clear screen & go to top */
-	printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf);
+	/* go to top & clear to the end of screen */
+	printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
 	(*lines_rem_p)--;
 
 	/* Display CPU time split as percentage of total time
@@ -518,7 +518,7 @@ static NOINLINE void display_process_list(int lines_rem, int scr_width)
 #endif
 
 	/* what info of the processes is shown */
-	printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
+	printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
 		"  PID  PPID USER     STAT   VSZ %MEM"
 		IF_FEATURE_TOP_SMP_PROCESS(" CPU")
 		IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
@@ -772,7 +772,7 @@ static void display_topmem_header(int scr_width, int *lines_rem_p)
 	snprintf(linebuf, sizeof(linebuf),
 		"Mem total:%s anon:%s map:%s free:%s",
 		S(total), S(anon), S(map), S(mfree));
-	printf(OPT_BATCH_MODE ? "%.*s\n" : "\e[H\e[J%.*s\n", scr_width, linebuf);
+	printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, linebuf);
 
 	snprintf(linebuf, sizeof(linebuf),
 		" slab:%s buf:%s cache:%s dirty:%s write:%s",
diff --git a/procps/watch.c b/procps/watch.c
index 126945c..a1cde9e 100644
--- a/procps/watch.c
+++ b/procps/watch.c
@@ -52,7 +52,8 @@ int watch_main(int argc UNUSED_PARAM, char **argv)
 	width = (unsigned)-1; // make sure first time new_width != width
 	header = NULL;
 	while (1) {
-		printf("\033[H\033[J");
+		/* home; clear to the end of screen */
+		printf("\033[H""\033[J");
 		if (!(opt & 0x2)) { // no -t
 			const unsigned time_len = sizeof("1234-67-90 23:56:89");
 			time_t t;
-- 
1.6.3.3



More information about the busybox-cvs mailing list