Add a log print function type for information reporting

This type allows the use of either printf-based or log-based functions
when reporting information.

1 files changed, 40 insertions, 6 deletions

diff --git a/kern/printf.c b/kern/printf.c
index 29267a6e..8ef3e863 100644
--- a/kern/printf.c
+++ b/kern/printf.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2012, 2013 Richard Braun.
+ * Copyright (c) 2010-2019 Richard Braun.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,6 +32,20 @@
 static char printf_buffer[PRINTF_BUFSIZE];
 static struct spinlock printf_lock;
 
+static int
+vprintf_common(const char *format, va_list ap)
+{
+    int length;
+
+    length = fmt_vsnprintf(printf_buffer, sizeof(printf_buffer), format, ap);
+
+    for (char *ptr = printf_buffer; *ptr != '\0'; ptr++) {
+        console_putchar(*ptr);
+    }
+
+    return length;
+}
+
 int
 printf(const char *format, ...)
 {
@@ -50,16 +64,36 @@ vprintf(const char *format, va_list ap)
 {
     unsigned long flags;
     int length;
-    char *ptr;
 
     spinlock_lock_intr_save(&printf_lock, &flags);
+    length = vprintf_common(format, ap);
+    spinlock_unlock_intr_restore(&printf_lock, flags);
 
-    length = fmt_vsnprintf(printf_buffer, sizeof(printf_buffer), format, ap);
+    return length;
+}
 
-    for (ptr = printf_buffer; *ptr != '\0'; ptr++) {
-        console_putchar(*ptr);
-    }
+int
+printf_ln(const char *format, ...)
+{
+    va_list ap;
+    int length;
+
+    va_start(ap, format);
+    length = vprintf_ln(format, ap);
+    va_end(ap);
+
+    return length;
+}
+
+int
+vprintf_ln(const char *format, va_list ap)
+{
+    unsigned long flags;
+    int length;
 
+    spinlock_lock_intr_save(&printf_lock, &flags);
+    length = vprintf_common(format, ap);
+    console_putchar('\n');
     spinlock_unlock_intr_restore(&printf_lock, flags);
 
     return length;