* vt100.c
* - VT100/xterm Emulation
*/
-#include <string.h>
#include <limits.h>
#include "include/vt100.h"
#include "include/display.h"
#include <ctype.h> // isalpha
-#include <acess/sys.h> // _SysDebug
-#include <assert.h>
+#ifdef KERNEL_VERSION
+# define _SysDebug(v...) Debug("VT100 "v)
+#else
+# include <acess/sys.h> // _SysDebug
+# include <string.h>
+# include <assert.h>
+#endif
+
+enum eExcapeMode {
+ MODE_NORMAL,
+ MODE_IGNORE,
+ MODE_STRING
+};
+enum eStringType {
+ STRING_IGNORE,
+ STRING_TITLE
+};
+
+#define FLAG_BOLD 0x01
+#define FLAG_REVERSE 0x02
+
+typedef struct {
+ uint32_t Flags;
+ int CurFG, CurBG;
+
+ enum eExcapeMode Mode;
+
+ enum eStringType StringType;
+ size_t StringLen;
+ char *StringCache;
+} tVT100State;
const uint32_t caVT100Colours[] = {
- // Black, Red, Green, Yellow, Blue, Purple, Cyan, Gray
+ // Black, Red, Green, Yellow, Blue, Magenta, Cyan, Gray
// Same again, but bright
- 0x000000, 0x770000, 0x007700, 0x777700, 0x000077, 0x770077, 0x007777, 0xAAAAAAA,
- 0xCCCCCC, 0xFF0000, 0x00FF00, 0xFFFF00, 0x0000FF, 0xFF00FF, 0x00FFFF, 0xFFFFFFF
+ 0x000000, 0x770000, 0x007700, 0x777700, 0x000077, 0x770077, 0x007777, 0xAAAAAA,
+ 0xCCCCCC, 0xFF0000, 0x00FF00, 0xFFFF00, 0x0000FF, 0xFF00FF, 0x00FFFF, 0xFFFFFF,
};
+ int _locate_eos(size_t Len, const char *Buf);
int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buf);
+ int Term_HandleVT100_Short(tTerminal *Term, int Len, const char *Buf);
static inline int min(int a, int b)
{
return a < b ? a : b;
}
+int _locate_eos(size_t Len, const char *Buf)
+{
+ size_t ret = 0;
+ while( ret < Len )
+ {
+ if( Buf[ret] == '\007' )
+ return ret;
+ if( Buf[ret] == '\x9c' )
+ return ret;
+ if( ret+1 < Len && Buf[ret] == '\x1b' && Buf[ret+1] == '\\' )
+ return ret;
+ }
+ return -1;
+}
+
int Term_HandleVT100(tTerminal *Term, int Len, const char *Buf)
{
#define MAX_VT100_ESCAPE_LEN 16
static char inc_buf[MAX_VT100_ESCAPE_LEN];
static int inc_len = 0;
+ tVT100State *st = Display_GetTermState(Term);
+
+ if( st == NULL ) {
+ st = malloc( sizeof(*st) );
+ memset(st, 0, sizeof(*st));
+ Display_SetTermState(Term, st);
+ }
+
+ if( st->Mode == MODE_IGNORE ) {
+ st->Mode = MODE_NORMAL;
+ // Used for multi-byte EOS
+ return 1;
+ }
+ if( st->Mode == MODE_STRING )
+ {
+ // We're in a string mode
+ int pos = _locate_eos(Len, Buf);
+ size_t bytes = (pos >= 0 ? pos : Len);
+ char *tmp = realloc(st->StringCache, st->StringLen + bytes+1);
+ if(!tmp) return bytes;
+ memcpy(tmp+st->StringLen, Buf, bytes);
+ tmp[st->StringLen+bytes] = 0;
+
+ _SysDebug("pos=%i", pos);
+ _SysDebug("'%.*s'", bytes, Buf);
+ // Only apply when we hit EOS at the start
+ if( pos != 0 )
+ return bytes;
+ switch(st->StringType)
+ {
+ case STRING_TITLE:
+ Display_SetTitle(Term, st->StringCache);
+ break;
+ case STRING_IGNORE:
+ break;
+ }
+ free(st->StringCache);
+ st->StringCache = 0;
+ st->StringLen = 0;
+
+ if( *Buf == '\x1b' ) {
+ st->Mode = MODE_IGNORE;
+ // skip the '\\'
+ }
+ else
+ st->Mode = MODE_NORMAL;
+ return 1;
+ }
if( inc_len > 0 || *Buf == '\x1b' )
{
// Handle VT100 (like) escape sequence
int new_bytes = min(MAX_VT100_ESCAPE_LEN - inc_len, Len);
- int ret = 0, old_inc_len = inc_len;
+ int ret = 0;
+ int old_inc_len = inc_len;
memcpy(inc_buf + inc_len, Buf, new_bytes);
+ if( new_bytes == 0 ) {
+ _SysDebug("Term_HandleVT100: Hit max? (Len=%i) Flushing cache", Len);
+ inc_len = 0;
+ return 0;
+ }
+
inc_len += new_bytes;
+ //_SysDebug("inc_buf = %i '%.*s'", inc_len, inc_len, inc_buf);
if( inc_len <= 1 )
return 1; // Skip 1 character (the '\x1b')
- switch(inc_buf[1])
- {
- case '[': // Multibyte, funtime starts
- ret = Term_HandleVT100_Long(Term, inc_len-2, inc_buf+2);
- if( ret > 0 ) {
- ret += 2;
- }
- break;
- default:
- ret = 2;
- break;
- }
+ ret = Term_HandleVT100_Short(Term, inc_len, inc_buf);
if( ret != 0 ) {
inc_len = 0;
assert(ret > old_inc_len);
+ //_SysDebug("%i bytes of escape code '%.*s' (return %i)",
+ // ret, ret, inc_buf, ret-old_inc_len);
ret -= old_inc_len; // counter cached bytes
}
+ else
+ ret = new_bytes;
return ret;
}
switch( *Buf )
{
+ // TODO: Need to handle \t and ^A-Z
case '\b':
Display_MoveCursor(Term, 0, -1);
Display_AddText(Term, 1, " ");
Display_MoveCursor(Term, 0, -1);
- // TODO: Need to handle \t and ^A-Z
return 1;
case '\t':
// TODO: tab (get current cursor pos, space until multiple of 8)
+ _SysDebug("TODO: VT100 Support \\t tab");
return 1;
case '\n':
+ // TODO: Support disabling CR after NL
Display_Newline(Term, 1);
return 1;
case '\r':
+ if( Len >= 2 && Buf[1] == '\n' ) {
+ // Fast case for \r\n
+ Display_Newline(Term, 1);
+ return 2;
+ }
Display_MoveCursor(Term, 0, INT_MIN);
return 1;
}
return -ret;
}
+int Term_HandleVT100_Short(tTerminal *Term, int Len, const char *Buf)
+{
+ tVT100State *st = Display_GetTermState(Term);
+ int tmp;
+ switch(Buf[1])
+ {
+ case '[': // Multibyte, funtime starts
+ tmp = Term_HandleVT100_Long(Term, Len-2, Buf+2);
+ assert(tmp >= 0);
+ if( tmp == 0 )
+ return 0;
+ return tmp + 2;
+ case ']':
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_IGNORE;
+ _SysDebug("TODO: \\e] Support title changes");
+ return 2;
+ case '=':
+ _SysDebug("TODO: \\e= Application Keypad");
+ return 2;
+ case '>':
+ _SysDebug("TODO: \\e= Normal Keypad");
+ return 2;
+
+ case '(': // Update G0 charset
+ tmp = 0; if(0)
+ case ')': // Update G1 charset
+ tmp = 1; if(0)
+ case '*':
+ tmp = 2; if(0)
+ case '+':
+ tmp = 3;
+
+ if( Len <= 2 )
+ return 0; // We need more
+ switch(Buf[2])
+ {
+ case '0': // DEC Special Character/Linedrawing set
+ case 'A': // UK
+ case 'B': // US ASCII
+ break;
+ }
+ return 3;
+ // xterm C1 \eD and \eM are 'Index' and 'Reverse Index'
+ // - Aparently scroll?
+ //case 'D':
+ // Display_ScrollDown(Term, 1);
+ // ret = 2;
+ // break;
+ //case 'M':
+ // Display_ScrollDown(Term, -1);
+ // ret = 2;
+ // break;
+ default:
+ _SysDebug("Unknown VT100 \\e%c", Buf[1]);
+ return 2;
+ }
+}
+
int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buffer)
{
+ tVT100State *st = Display_GetTermState(Term);
char c;
int argc = 0, j = 0;
int args[6] = {0,0,0,0,0,0};
case 'l': // unset
switch(args[0])
{
+ case 1: // Aplication cursor keys
+ _SysDebug("TODO: \\e[?1%c Application cursor keys", c);
+ break;
case 25: // Hide cursor
_SysDebug("TODO: \\e[?25%c Show/Hide cursor", c);
break;
case 1047: // Alternate buffer
Display_ShowAltBuffer(Term, set);
break;
+ case 1048: // Save/restore cursor in DECSC
+ _SysDebug("TODO: \\e[?1048%c Save/Restore cursor", c);
+ break;
+ case 1049: // Save/restore cursor in DECSC and use alternate buffer
+ _SysDebug("TODO: \\e[?1049%c Save/Restore cursor", c);
+ Display_ShowAltBuffer(Term, set);
+ break;
default:
_SysDebug("TODO: \\e[?%i%c Unknow DEC private mode", args[0], c);
break;
// Standard commands
switch( c )
{
+ case 'A':
+ Display_MoveCursor(Term, -(argc >= 1 ? args[0] : 1), 0);
+ break;
+ case 'B':
+ Display_MoveCursor(Term, (argc >= 1 ? args[0] : 1), 0);
+ break;
+ case 'C':
+ Display_MoveCursor(Term, 0, (argc >= 1 ? args[0] : 1));
+ break;
+ case 'D':
+ Display_MoveCursor(Term, 0, -(argc >= 1 ? args[0] : 1));
+ break;
case 'H':
if( argc != 2 ) {
}
Display_SetCursor(Term, args[0], args[1]);
}
break;
- case 'J':
- if( argc == 0 )
+ case 'J': // Clear lines
+ switch( args[0] )
+ {
+ case 0:
+ Display_ClearLines(Term, 1); // Down
+ break;
+ case 1:
+ Display_ClearLines(Term, -1); // Up
+ break;
+ case 2:
+ Display_ClearLines(Term, 0); // All
+ break;
+ default:
+ _SysDebug("Unknown VT100 %i J", args[0]);
+ break;
+ }
+ break;
+ case 'K':
+ switch( args[0] )
+ {
+ case 0: // To EOL
+ Display_ClearLine(Term, 1);
+ break;
+ case 1: // To SOL
+ Display_ClearLine(Term, -1);
+ break;
+ case 2:
Display_ClearLine(Term, 0);
- else if( args[0] == 2 )
- Display_ClearLines(Term, 0); // Entire screen!
- else
- _SysDebug("TODO: VT100 %i J", args[0]);
+ break;
+ default:
+ _SysDebug("Unknown VT100 %i K", args[0]);
+ break;
+ }
+ case 'S': // Scroll up n=1
+ Display_ScrollDown(Term, -(argc >= 1 ? args[0] : 1));
break;
case 'T': // Scroll down n=1
- Display_ScrollDown(Term, 1);
+ Display_ScrollDown(Term, (argc >= 1 ? args[0] : 1));
break;
case 'm':
if( argc == 0 )
{
// Reset
+ Display_ResetAttributes(Term);
}
else
{
- int i;
- for( i = 0; i < argc; i ++ )
+ for( int i = 0; i < argc; i ++ )
{
- if( args[i] < 8 )
- {
- // TODO: Flags?
- }
- else if( 30 <= args[i] && args[i] <= 37 )
- {
- // TODO: Bold/bright
- Display_SetForeground( Term, caVT100Colours[ args[i]-30 ] );
- }
- else if( 40 <= args[i] && args[i] <= 47 )
+ switch(args[i])
{
- // TODO: Bold/bright
- Display_SetBackground( Term, caVT100Colours[ args[i]-30 ] );
+ case 0:
+ st->Flags = 0;
+ Display_ResetAttributes(Term);
+ break;
+ case 1:
+ st->Flags |= FLAG_BOLD;
+ Display_SetForeground( Term, caVT100Colours[st->CurFG + 8] );
+ break;
+ case 2:
+ _SysDebug("TODO: VT100 \\e[1m - Reverse");
+ break;
+ case 30 ... 37:
+ st->CurFG = args[i]-30;
+ if(0)
+ case 39:
+ st->CurFG = 7;
+ Display_SetForeground( Term,
+ caVT100Colours[ st->CurFG + (st->Flags&FLAG_BOLD?8:0) ] );
+ break;
+ case 40 ... 47:
+ st->CurBG = args[i]-40;
+ if(0)
+ case 49:
+ st->CurBG = 0;
+ Display_SetBackground( Term, caVT100Colours[ st->CurBG ] );
+ break;
+ default:
+ _SysDebug("TODO: VT100 \\e[%im", args[i]);
+ break;
}
}
}
break;
// Set scrolling region
case 'r':
- Display_SetScrollArea(Term, args[0], args[1]);
+ Display_SetScrollArea(Term, args[0], (args[1] - args[0]));
break;
case 's':
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