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authorGravatar Pascal Bellard <pascal.bellard@ads-lu.com>2010-06-28 15:50:22 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2010-06-28 15:51:01 +0200
commitff37799dfe0e6e8fb9b971a2aeb4076d8a3784ec (patch)
tree61705ab230d6ba9b0d625f6087c39bc2dea0a679 /miscutils
parent7d1201c5d7014365fb7e3d9da58f5e3fe0a1edc8 (diff)
downloadbusybox-ff37799dfe0e6e8fb9b971a2aeb4076d8a3784ec.tar.gz
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conspy: code shrink
function old new delta conspy_main 1446 1444 -2 screen_read_close 114 108 -6 screen_char 299 293 -6 Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
-rw-r--r--miscutils/conspy.c123
1 files changed, 63 insertions, 60 deletions
diff --git a/miscutils/conspy.c b/miscutils/conspy.c
index 11105f0b8..6f2f0255c 100644
--- a/miscutils/conspy.c
+++ b/miscutils/conspy.c
@@ -56,31 +56,33 @@ struct globals {
int size;
int x, y;
int kbd_fd;
- unsigned width;
- unsigned height;
- unsigned col;
- unsigned line;
+ int vcsa_fd;
int ioerror_count;
int key_count;
int escape_count;
int nokeys;
int current;
- int vcsa_fd;
- uint16_t last_attr;
- uint8_t last_bold;
- uint8_t last_blink;
- uint8_t last_fg;
- uint8_t last_bg;
- char attrbuf[sizeof("\033[0;1;5;30;40m")];
+ // cached local tty parameters
+ unsigned width;
+ unsigned height;
+ unsigned col;
+ unsigned line;
smallint curoff;
+ uint8_t last_attr;
+ uint8_t force_attr_change;
+ char attrbuf[sizeof("\033[0;1;5;30;40m")];
+ // remote console
struct screen_info remote;
+ // saved local tty terminfo
struct termios term_orig;
};
#define G (*ptr_to_globals)
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
- strcpy((char*)&G.last_attr, "\xff\xff\xff\xff\xff\xff" "\033["); \
+ G.attrbuf[0] = '\033'; \
+ G.attrbuf[1] = '['; \
+ G.force_attr_change = 0xff; \
} while (0)
enum {
@@ -100,7 +102,6 @@ static void screen_read_close(void)
char *data = G.data + G.current;
xread(G.vcsa_fd, data, G.size);
- G.last_attr = 0;
for (i = 0; i < G.remote.lines; i++) {
for (j = 0; j < G.remote.cols; j++, NEXT(data)) {
unsigned x = j - G.x; // if will catch j < G.x too
@@ -117,9 +118,12 @@ static void screen_read_close(void)
static void screen_char(char *data)
{
- uint8_t attr = ATTR(data);
+ if (!BW) {
+ uint8_t attr = ATTR(data);
+ //uint8_t attr = ATTR(data) >> 1; // for framebuffer console
+ uint8_t attr_diff = (G.last_attr ^ attr) | G.force_attr_change;
- if (!BW && G.last_attr != attr) {
+ if (attr_diff) {
// Attribute layout for VGA compatible text videobuffer:
// blinking text
// |red bkgd
@@ -143,51 +147,49 @@ static void screen_char(char *data)
// green text
// blue text
// text 8th bit
- // converting RGB color bit triad to BGR:
- static const char color[8] = "04261537";
- char *ptr;
- uint8_t fg, bold, bg, blink;
-
- G.last_attr = attr;
-
- //attr >>= 1; // for framebuffer console
- ptr = G.attrbuf + sizeof("\033[")-1;
- fg = (attr & 0x07);
- bold = (attr & 0x08);
- bg = (attr & 0x70);
- blink = (attr & 0x80);
- if (G.last_bold > bold || G.last_blink > blink) {
- G.last_bold = G.last_blink = 0;
- G.last_bg = 0xff;
- *ptr++ = '0';
- *ptr++ = ';';
- }
- if (G.last_bold != bold) {
- G.last_bold = bold;
- *ptr++ = '1';
- *ptr++ = ';';
- }
- if (G.last_blink != blink) {
- G.last_blink = blink;
- *ptr++ = '5';
- *ptr++ = ';';
- }
- if (G.last_fg != fg) {
- G.last_fg = fg;
- *ptr++ = '3';
- *ptr++ = color[fg];
- *ptr++ = ';';
- }
- if (G.last_bg != bg) {
- G.last_bg = bg;
- *ptr++ = '4';
- *ptr++ = color[bg >> 4];
- *ptr++ = ';';
- }
- if (ptr != G.attrbuf + sizeof("\033[")-1) {
- ptr[-1] = 'm';
- *ptr = '\0';
- fputs(G.attrbuf, stdout);
+ // converting RGB color bit triad to BGR:
+ static const char color[8] = "04261537";
+ const uint8_t fg_mask = 0x07, bold_mask = 0x08;
+ const uint8_t bg_mask = 0x70, blink_mask = 0x80;
+ char *ptr;
+
+ ptr = G.attrbuf + 2; /* skip "ESC [" */
+
+ // (G.last_attr & ~attr) has 1 only where
+ // G.last_attr has 1 but attr has 0.
+ // Here we check whether we have transition
+ // bold->non-bold or blink->non-blink:
+ if ((G.last_attr & ~attr) & (bold_mask | blink_mask)) {
+ *ptr++ = '0'; // "reset all attrs"
+ *ptr++ = ';';
+ // must set fg & bg, maybe need to set bold or blink:
+ attr_diff = attr | ~(bold_mask | blink_mask);
+ }
+ G.force_attr_change = 0;
+ G.last_attr = attr;
+ if (attr_diff & bold_mask) {
+ *ptr++ = '1';
+ *ptr++ = ';';
+ }
+ if (attr_diff & blink_mask) {
+ *ptr++ = '5';
+ *ptr++ = ';';
+ }
+ if (attr_diff & fg_mask) {
+ *ptr++ = '3';
+ *ptr++ = color[attr & fg_mask];
+ *ptr++ = ';';
+ }
+ if (attr_diff & bg_mask) {
+ *ptr++ = '4';
+ *ptr++ = color[(attr & bg_mask) >> 4];
+ *ptr++ = ';';
+ }
+ if (ptr != G.attrbuf + 2) {
+ ptr[-1] = 'm';
+ *ptr = '\0';
+ fputs(G.attrbuf, stdout);
+ }
}
}
putchar(CHAR(data));
@@ -402,6 +404,7 @@ int conspy_main(int argc UNUSED_PARAM, char **argv)
termbuf.c_cc[VMIN] = 1;
termbuf.c_cc[VTIME] = 0;
tcsetattr(G.kbd_fd, TCSANOW, &termbuf);
+
poll_timeout_ms = 250;
while (1) {
struct pollfd pfd;