diff options
Diffstat (limited to 'os/various/chprintf.c')
| -rw-r--r-- | os/various/chprintf.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/os/various/chprintf.c b/os/various/chprintf.c index 383a2121a..1645cd678 100644 --- a/os/various/chprintf.c +++ b/os/various/chprintf.c @@ -45,6 +45,29 @@ static char *ltoa(char *p, long num, unsigned radix) { return p;
}
+/**
+ * @brief System formatted output function.
+ * @details This function implements a minimal @p printf() like functionality
+ * with output on a @p BaseChannel.
+ * The general parameters format is: %[.][width|*][l|L]p.
+ * The following parameter types (p) are supported:
+ * - <b>x</b> hexadecimal integer.
+ * - <b>X</b> hexadecimal long.
+ * - <b>o</b> octal integer.
+ * - <b>O</b> octal long.
+ * - <b>d</b> decimal signed integer.
+ * - <b>D</b> decimal signed long.
+ * - <b>u</b> decimal unsigned integer.
+ * - <b>U</b> decimal unsigned long.
+ * - <b>c</b> character.
+ * - <b>s</b> string.
+ * .
+ * @note Floating point types are not implemented, this function is meant
+ * as a system utility and not a full implementation.
+ *
+ * @param[in] chp pointer to a @p BaseChannel implementing object
+ * @param[in] fmt formatting string
+ */
void chprintf(BaseChannel *chp, const char *fmt, ...) {
va_list ap;
char buf[MAX_FILLER + 1];
@@ -84,8 +107,7 @@ void chprintf(BaseChannel *chp, const char *fmt, ...) { c = va_arg(ap, int);
else
break;
- width *= 10;
- width += c;
+ width = width * 10 + c;
}
n = 0;
if (c == '.') {
@@ -122,7 +144,8 @@ void chprintf(BaseChannel *chp, const char *fmt, ...) { lflag = TRUE;
case 'o':
c = 8;
- oxu: if (lflag)
+oxu:
+ if (lflag)
l = va_arg(ap, long);
else
l = va_arg(ap, int);
|