compel std: rename printing functions

Let's rename the printing functions so their names look more like
the standard ones.

1. putc/puts with a file descriptor.

__std_putc -> std_dputc
__std_puts -> std_dputs

There are no standard putc/puts that accept fd as an argument,
but the libc convention is to use d prefix for such. Therefore:

NOTE we keep the order of the arguments intact, to be in line
with the rest of the functions.

2. *printf

__std_printk -> std_vdprintf
__std_printf -> std_dprintf

The reason is, these are the names of libc functions with similar
functionality/arguments.

Cc: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/plugins/include/uapi/std/string.h

@@ -11,16 +11,15 @@
 #define	STDERR_FILENO	2	/* Standard error output.  */
 
 
-extern void __std_putc(int fd, char c);
-extern void __std_puts(int fd, const char *s);
-extern void __std_printk(int fd, const char *format, va_list args);
-extern void __std_printf(int fd, const char *format, ...)
+extern void std_dputc(int fd, char c);
+extern void std_dputs(int fd, const char *s);
+extern void std_vdprintf(int fd, const char *format, va_list args);
+extern void std_dprintf(int fd, const char *format, ...)
 	__attribute__ ((__format__ (__printf__, 2, 3)));
 
-
-#define std_printf(fmt, ...)	__std_printf(STDOUT_FILENO, fmt, ##__VA_ARGS__)
-#define std_puts(s)		__std_puts(STDOUT_FILENO, s)
-#define std_putchar(c)		__std_putc(STDOUT_FILENO, c)
+#define std_printf(fmt, ...)	std_dprintf(STDOUT_FILENO, fmt, ##__VA_ARGS__)
+#define std_puts(s)		std_dputs(STDOUT_FILENO, s)
+#define std_putchar(c)		std_dputc(STDOUT_FILENO, c)
 
 extern unsigned long std_strtoul(const char *nptr, char **endptr, int base);
 extern int std_strcmp(const char *cs, const char *ct);

compel/plugins/std/string.c

@@ -9,15 +9,15 @@
 
 static const char conv_tab[] = "0123456789abcdefghijklmnopqrstuvwxyz";
 
-void __std_putc(int fd, char c)
+void std_dputc(int fd, char c)
 {
 	sys_write(fd, &c, 1);
 }
 
-void __std_puts(int fd, const char *s)
+void std_dputs(int fd, const char *s)
 {
 	for (; *s; s++)
-		__std_putc(fd, *s);
+		std_dputc(fd, *s);
 }
 
 static size_t __std_vprint_long_hex(char *buf, size_t blen, unsigned long num, char **ps)
@@ -74,7 +74,7 @@ done:
 	return blen - (s - buf);
 }
 
-void __std_printk(int fd, const char *format, va_list args)
+void std_vdprintf(int fd, const char *format, va_list args)
 {
 	const char *s = format;
 
@@ -83,7 +83,7 @@ void __std_printk(int fd, const char *format, va_list args)
 		int along = 0;
 
 		if (*s != '%') {
-			__std_putc(fd, *s);
+			std_dputc(fd, *s);
 			continue;
 		}
 
@@ -97,7 +97,7 @@ void __std_printk(int fd, const char *format, va_list args)
 
 		switch (*s) {
 		case 's':
-			__std_puts(fd, va_arg(args, char *));
+			std_dputs(fd, va_arg(args, char *));
 			break;
 		case 'd':
 			__std_vprint_long(buf, sizeof(buf),
@@ -105,7 +105,7 @@ void __std_printk(int fd, const char *format, va_list args)
 					  va_arg(args, long) :
 					  (long)va_arg(args, int),
 					  &t);
-			__std_puts(fd, t);
+			std_dputs(fd, t);
 			break;
 		case 'x':
 			__std_vprint_long_hex(buf, sizeof(buf),
@@ -113,18 +113,18 @@ void __std_printk(int fd, const char *format, va_list args)
 					      va_arg(args, long) :
 					      (long)va_arg(args, int),
 					      &t);
-			__std_puts(fd, t);
+			std_dputs(fd, t);
 			break;
 		}
 	}
 }
 
-void __std_printf(int fd, const char *format, ...)
+void std_dprintf(int fd, const char *format, ...)
 {
 	va_list args;
 
 	va_start(args, format);
-	__std_printk(fd, format, args);
+	std_vdprintf(fd, format, args);
 	va_end(args);
 }