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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:19:42 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2006-09-19 14:19:42 +0000
commite40c04b82695c1cde8ad9ed1e2aa1756463d73a7 (patch)
tree48da4f9e1f1a706d907cd95467995451b189ded6 /coreutils
parent9efb070dcb8c1bf92c3a44b182e13c8da708bd6f (diff)
downloadbusybox-e40c04b82695c1cde8ad9ed1e2aa1756463d73a7.tar.gz
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stty: simplify linewrapping code a bit
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/stty.c88
1 files changed, 33 insertions, 55 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c
index 6f14efe63..641bfb815 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -403,35 +403,36 @@ static ATTRIBUTE_NORETURN void perror_on_device(const char *fmt)
bb_perror_msg_and_die(fmt, device_name);
}
-static ATTRIBUTE_ALWAYS_INLINE int streq(const char *a, const char *b)
-{
- return strcmp(a, b) == 0;
-}
+/* No, inline won't be as efficient (gcc 3.4.3) */
+#define streq(a,b) (!strcmp((a),(b)))
/* Print format string MESSAGE and optional args.
Wrap to next line first if it won't fit.
Print a space first unless MESSAGE will start a new line */
-
static void wrapf(const char *message, ...)
{
+ char buf[128];
va_list args;
- char buf[1024]; /* Plenty long for our needs */
int buflen;
va_start(args, message);
- vsprintf(buf, message, args);
+ vsnprintf(buf, sizeof(buf), message, args);
va_end(args);
buflen = strlen(buf);
- if (current_col + (current_col > 0) + buflen >= max_col) {
- putchar('\n');
- current_col = 0;
- }
+ if (!buflen) return;
+
if (current_col > 0) {
- putchar(' ');
current_col++;
+ if (current_col + buflen >= max_col) {
+ putchar('\n');
+ current_col = 0;
+ } else
+ if (buf[0] != '\n') putchar(' ');
}
fputs(buf, stdout);
current_col += buflen;
+ if (buf[buflen-1] == '\n')
+ current_col = 0;
}
static const struct suffix_mult stty_suffixes[] = {
@@ -584,13 +585,13 @@ end_option:
switch (param) {
#ifdef HAVE_C_LINE
case param_line:
+# ifndef TIOCGWINSZ
bb_xparse_number(argnext, stty_suffixes);
break;
+# endif /* else fall-through */
#endif
#ifdef TIOCGWINSZ
case param_rows:
- bb_xparse_number(argnext, stty_suffixes);
- break;
case param_cols:
bb_xparse_number(argnext, stty_suffixes);
break;
@@ -1029,8 +1030,6 @@ static void display_window_size(int fancy)
} else {
wrapf(fancy ? "rows %d; columns %d;" : "%d %d\n",
win.ws_row, win.ws_col);
- if (!fancy)
- current_col = 0;
}
}
#endif
@@ -1078,19 +1077,17 @@ static tcflag_t *mode_type_flag(enum mode_type type, const struct termios *mode)
static void display_changed(const struct termios *mode)
{
int i;
- int empty_line;
tcflag_t *bitsp;
unsigned long mask;
enum mode_type prev_type = control;
display_speed(mode, 1);
#ifdef HAVE_C_LINE
- wrapf("line = %d;", mode->c_line);
+ wrapf("line = %d;\n", mode->c_line);
+#else
+ wrapf("\n");
#endif
- putchar('\n');
- current_col = 0;
- empty_line = 1;
for (i = 0; control_info[i].name != stty_min; ++i) {
if (mode->c_cc[control_info[i].offset] == control_info[i].saneval)
continue;
@@ -1105,28 +1102,20 @@ static void display_changed(const struct termios *mode)
&& (control_info[i].name == stty_eof
|| control_info[i].name == stty_eol)) continue;
#endif
-
- empty_line = 0;
wrapf("%s = %s;", control_info[i].name,
visible(mode->c_cc[control_info[i].offset]));
}
if ((mode->c_lflag & ICANON) == 0) {
- wrapf("min = %d; time = %d;\n", (int) mode->c_cc[VMIN],
+ wrapf("min = %d; time = %d;", (int) mode->c_cc[VMIN],
(int) mode->c_cc[VTIME]);
- } else if (empty_line == 0)
- putchar('\n');
- current_col = 0;
+ }
+ if (current_col) wrapf("\n");
- empty_line = 1;
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & OMIT)
continue;
if (EMT(mode_info[i].type) != prev_type) {
- if (empty_line == 0) {
- putchar('\n');
- current_col = 0;
- empty_line = 1;
- }
+ if (current_col) wrapf("\n");
prev_type = EMT(mode_info[i].type);
}
@@ -1135,16 +1124,12 @@ static void display_changed(const struct termios *mode)
if ((*bitsp & mask) == mode_info[i].bits) {
if (mode_info[i].flags & SANE_UNSET) {
wrapf("%s", mode_info[i].name);
- empty_line = 0;
}
} else if ((mode_info[i].flags & (SANE_SET | REV)) == (SANE_SET | REV)) {
wrapf("-%s", mode_info[i].name);
- empty_line = 0;
}
}
- if (empty_line == 0)
- putchar('\n');
- current_col = 0;
+ if (current_col) wrapf("\n");
}
static void
@@ -1160,10 +1145,10 @@ display_all(const struct termios *mode)
display_window_size(1);
#endif
#ifdef HAVE_C_LINE
- wrapf("line = %d;", mode->c_line);
+ wrapf("line = %d;\n", mode->c_line);
+#else
+ wrapf("\n");
#endif
- putchar('\n');
- current_col = 0;
for (i = 0; control_info[i].name != stty_min; ++i) {
/* If swtch is the same as susp, don't print both */
@@ -1184,9 +1169,7 @@ display_all(const struct termios *mode)
if ((mode->c_lflag & ICANON) == 0)
#endif
wrapf("min = %d; time = %d;", mode->c_cc[VMIN], mode->c_cc[VTIME]);
- if (current_col != 0)
- putchar('\n');
- current_col = 0;
+ if (current_col) wrapf("\n");
for (i = 0; i < NUM_mode_info; ++i) {
if (mode_info[i].flags & OMIT)
@@ -1204,28 +1187,23 @@ display_all(const struct termios *mode)
else if (mode_info[i].flags & REV)
wrapf("-%s", mode_info[i].name);
}
- putchar('\n');
- current_col = 0;
+ if (current_col) wrapf("\n");
}
static void display_speed(const struct termios *mode, int fancy)
{
+ //12345678 9 10
+ const char *fmt_str = "%lu %lu\n\0ispeed %lu baud; ospeed %lu baud;";
unsigned long ispeed, ospeed;
- const char *fmt_str =
- "%lu %lu\n\0" "ispeed %lu baud; ospeed %lu baud;\0"
- "%lu\n\0" "\0\0\0\0" "speed %lu baud;";
ospeed = ispeed = cfgetispeed(mode);
if (ispeed == 0 || ispeed == (ospeed = cfgetospeed(mode))) {
ispeed = ospeed; /* in case ispeed was 0 */
- fmt_str += 43;
- }
- if (fancy) {
- fmt_str += 9;
+ //1234 5 6 7 8 9 10
+ fmt_str = "%lu\n\0\0\0\0\0speed %lu baud;";
}
+ if (fancy) fmt_str += 9;
wrapf(fmt_str, tty_baud_to_value(ispeed), tty_baud_to_value(ospeed));
- if (!fancy)
- current_col = 0;
}
static void display_recoverable(const struct termios *mode)