add console.h

diff --git a/grubload/console.h b/grubload/console.h
new file mode 100644 (file)
index 0000000..dd15d47
--- /dev/null
+++ b/grubload/console.h
@@ -0,0 +1,142 @@
+/** @file console.h
+ *  @brief Function prototypes for the console driver.
+ *
+ *  This contains the prototypes and global variables for the console
+ *  driver
+ *
+ *  @author Michael Berman (mberman)
+ *  @bug No known bugs.
+ */
+
+#ifndef _CONSOLE_H
+#define _CONSOLE_H
+
+#include <video_defines.h>
+
+/** @brief Prints character ch at the current location
+ *         of the cursor.
+ *
+ *  If the character is a newline ('\n'), the cursor is
+ *  be moved to the beginning of the next line (scrolling if necessary).  If
+ *  the character is a carriage return ('\r'), the cursor
+ *  is immediately reset to the beginning of the current
+ *  line, causing any future output to overwrite any existing
+ *  output on the line.  If backsapce ('\b') is encountered,
+ *  the previous character is erased.  See the main console.c description
+ *  for more backspace behavior.
+ *
+ *  @param ch the character to print
+ *  @return The input character
+ */
+int putbyte( char ch );
+
+/** @brief Prints the string s, starting at the current
+ *         location of the cursor.
+ *
+ *  If the string is longer than the current line, the
+ *  string fills up the current line and then
+ *  continues on the next line. If the string exceeds
+ *  available space on the entire console, the screen
+ *  scrolls up one line, and then the string
+ *  continues on the new line.  If '\n', '\r', and '\b' are
+ *  encountered within the string, they are handled
+ *  as per putbyte. If len is not a positive integer or s
+ *  is null, the function has no effect.
+ *
+ *  @param s The string to be printed.
+ *  @param len The length of the string s.
+ *  @return Void.
+ */
+void putbytes(const char* s, int len);
+
+/** @brief Changes the foreground and background color
+ *         of future characters printed on the console.
+ *
+ *  If the color code is invalid, the function has no effect.
+ *
+ *  @param color The new color code.
+ *  @return 0 on success or integer error code less than 0 if
+ *          color code is invalid.
+ */
+int set_term_color(int color);
+
+/** @brief Writes the current foreground and background
+ *         color of characters printed on the console
+ *         into the argument color.
+ *  @param color The address to which the current color
+ *         information will be written.
+ *  @return Void.
+ */
+void get_term_color(int* color);
+
+/** @brief Sets the position of the cursor to the
+ *         position (row, col).
+ *
+ *  Subsequent calls to putbytes should cause the console
+ *  output to begin at the new position. If the cursor is
+ *  currently hidden, a call to set_cursor() does not show
+ *  the cursor.
+ *
+ *  @param row The new row for the cursor.
+ *  @param col The new column for the cursor.
+ *  @return 0 on success or integer error code less than 0 if
+ *          cursor location is invalid.
+ */
+int set_cursor(int row, int col);
+
+/** @brief Writes the current position of the cursor
+ *         into the arguments row and col.
+ *  @param row The address to which the current cursor
+ *         row will be written.
+ *  @param col The address to which the current cursor
+ *         column will be written.
+ *  @return Void.
+ */
+void get_cursor(int* row, int* col);
+
+/** @brief Hides the cursor.
+ *
+ *  Subsequent calls to putbytes do not cause the
+ *  cursor to show again.
+ *
+ *  @return Void.
+ */
+void hide_cursor();
+
+/** @brief Shows the cursor.
+ *  
+ *  If the cursor is already shown, the function has no effect.
+ *
+ *  @return Void.
+ */
+void show_cursor();
+
+/** @brief Clears the entire console.
+ *
+ * The cursor is reset to the first row and column
+ *
+ *  @return Void.
+ */
+void clear_console();
+
+/** @brief Prints character ch with the specified color
+ *         at position (row, col).
+ *
+ *  If any argument is invalid, the function has no effect.
+ *
+ *  @param row The row in which to display the character.
+ *  @param col The column in which to display the character.
+ *  @param ch The character to display.
+ *  @param color The color to use to display the character.
+ *  @return Void.
+ */
+void draw_char(int row, int col, int ch, int color);
+
+/** @brief Returns the character displayed at position (row, col).
+ *  @param row Row of the character.
+ *  @param col Column of the character.
+ *  @return The character at (row, col).
+ */
+char get_char(int row, int col);
+
+#endif /* _CONSOLE_H */