ref: 4a81379a448a58feed9668c24be115748d3229db
dir: /textscreen/txt_io.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2005,2006 Simon Howard // // 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 the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // //----------------------------------------------------------------------------- // // Text mode I/O functions, similar to C stdio // //----------------------------------------------------------------------------- #include <stdlib.h> #include <string.h> #include "txt_io.h" #include "txt_main.h" static struct { txt_color_t color; char *name; } colors[] = { {TXT_COLOR_BLACK, "black"}, {TXT_COLOR_BLUE, "blue"}, {TXT_COLOR_GREEN, "green"}, {TXT_COLOR_CYAN, "cyan"}, {TXT_COLOR_RED, "red"}, {TXT_COLOR_MAGENTA, "magenta"}, {TXT_COLOR_BROWN, "brown"}, {TXT_COLOR_GREY, "grey"}, {TXT_COLOR_DARK_GREY, "darkgrey"}, {TXT_COLOR_BRIGHT_BLUE, "brightblue"}, {TXT_COLOR_BRIGHT_GREEN, "brightgreen"}, {TXT_COLOR_BRIGHT_CYAN, "brightcyan"}, {TXT_COLOR_BRIGHT_RED, "brightred"}, {TXT_COLOR_BRIGHT_MAGENTA, "brightmagenta"}, {TXT_COLOR_YELLOW, "yellow"}, {TXT_COLOR_BRIGHT_WHITE, "brightwhite"}, }; static int cur_x = 0, cur_y = 0; static txt_color_t fgcolor = TXT_COLOR_GREY; static txt_color_t bgcolor = TXT_COLOR_BLACK; static int GetColorForName(char *s) { size_t i; for (i=0; i<sizeof(colors) / sizeof(*colors); ++i) { if (!strcmp(s, colors[i].name)) { return colors[i].color; } } return -1; } static void NewLine(unsigned char *screendata) { int i; unsigned char *p; cur_x = 0; ++cur_y; if (cur_y >= TXT_SCREEN_H) { // Scroll the screen up cur_y = TXT_SCREEN_H - 1; memcpy(screendata, screendata + TXT_SCREEN_W * 2, TXT_SCREEN_W * 2 * (TXT_SCREEN_H -1)); // Clear the bottom line p = screendata + (TXT_SCREEN_H - 1) * 2 * TXT_SCREEN_W; for (i=0; i<TXT_SCREEN_W; ++i) { *p++ = ' '; *p++ = fgcolor | (bgcolor << 4); } } } static void PutChar(unsigned char *screendata, int c) { unsigned char *p; p = screendata + cur_y * TXT_SCREEN_W * 2 + cur_x * 2; switch (c) { case '\n': NewLine(screendata); break; case '\b': // backspace --cur_x; if (cur_x < 0) cur_x = 0; break; default: // Add a new character to the buffer p[0] = c; p[1] = fgcolor | (bgcolor << 4); ++cur_x; if (cur_x >= TXT_SCREEN_W) { NewLine(screendata); } break; } } void TXT_PutChar(int c) { unsigned char *screen; screen = TXT_GetScreenData(); PutChar(screen, c); } void TXT_Puts(char *s) { int previous_color = TXT_COLOR_BLACK; unsigned char *screen; char *p; char colorname_buf[20]; char *ending; int col; screen = TXT_GetScreenData(); for (p=s; *p != '\0'; ++p) { if (*p == '<') { ++p; if (*p == '<') { PutChar(screen, '<'); } else { ending = strchr(p, '>'); if (ending == NULL) { return; } strncpy(colorname_buf, p, 19); colorname_buf[ending-p] = '\0'; if (!strcmp(colorname_buf, "/")) { // End of color block col = previous_color; } else { col = GetColorForName(colorname_buf); if (col < 0) { return; } // Save the color for the ending marker previous_color = fgcolor; } TXT_FGColor(col); p = ending; } } else { PutChar(screen, *p); } } PutChar(screen, '\n'); } void TXT_GotoXY(int x, int y) { cur_x = x; cur_y = y; } void TXT_GetXY(int *x, int *y) { *x = cur_x; *y = cur_y; } void TXT_FGColor(txt_color_t color) { fgcolor = color; } void TXT_BGColor(int color, int blinking) { bgcolor = color; if (blinking) bgcolor |= TXT_COLOR_BLINKING; } void TXT_ClearScreen(void) { unsigned char *screen; int i; screen = TXT_GetScreenData(); for (i=0; i<TXT_SCREEN_W * TXT_SCREEN_H; ++i) { screen[i * 2] = ' '; screen[i * 2 + 1] = (bgcolor << 4) | fgcolor; } cur_x = 0; cur_y = 0; }