* 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>
+# include <stdlib.h> // malloc/free
+
+# define ASSERTC(a, r, b) assert(a r b)
+
+static inline int MIN(int a, int b)
+{
+ return a < b ? a : b;
+}
+#endif
+
+enum eExcapeMode {
+ MODE_NORMAL,
+ MODE_IGNORE,
+ MODE_STRING
+};
+enum eStringType {
+ STRING_IGNORE,
+ STRING_TITLE
+};
+
+#define FLAG_BOLD 0x01
+#define FLAG_REVERSE 0x02
+
+#define MAX_VT100_ESCAPE_LEN 32
+typedef struct {
+ uint32_t Flags;
+ int CurFG, CurBG;
+
+ char cache[MAX_VT100_ESCAPE_LEN];
+ int cache_len;
+
+ 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_Short(tTerminal *Term, int Len, const char *Buf);
int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buf);
+ int Term_HandleVT100_OSC(tTerminal *Term, int Len, const char *Buf);
-static inline int min(int a, int b)
+int _locate_eos(size_t Len, const char *Buf)
{
- return a < b ? a : b;
+ for( size_t ret = 0; ret < Len; ret ++ )
+ {
+ 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;
}
+/**
+ * \brief Detect and handle VT100/ANSI/xterm escape sequences
+ * \param Term Terminal handle (opaque)
+ * \param Len Number of avaliable bytes
+ * \param Buf Input buffer (\a Len bytes long)
+ * \return -ve : Number of bytes that should be sent to screen
+ * \return +ve/0 : Number of bytes consumed by this function
+ */
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( inc_len > 0 || *Buf == '\x1b' )
+ if( st->Mode == MODE_IGNORE ) {
+ st->Mode = MODE_NORMAL;
+ // Used for multi-byte EOS
+ _SysDebug("Ignore 1 '%c'", *Buf);
+ return 1;
+ }
+ else 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;
+ st->StringCache = tmp;
+ memcpy(tmp+st->StringLen, Buf, bytes);
+ tmp[st->StringLen+bytes] = 0;
+ st->StringLen += bytes;
+
+ _SysDebug("pos=%i", pos);
+ _SysDebug("Buf[+%zi] = '%.*s'", bytes, 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;
+ }
+ else {
+ // fall through
+ }
+
+ if( st->cache_len > 0 || *Buf == '\x1b' )
{
// Handle VT100 (like) escape sequence
- int new_bytes = min(MAX_VT100_ESCAPE_LEN - inc_len, Len);
+ int new_bytes = MIN(MAX_VT100_ESCAPE_LEN - st->cache_len, Len);
int ret = 0;
- int old_inc_len = inc_len;
- memcpy(inc_buf + inc_len, Buf, new_bytes);
+ int old_inc_len = st->cache_len;
+
+ memcpy(st->cache + st->cache_len, Buf, new_bytes);
if( new_bytes == 0 ) {
- inc_len = 0;
+ _SysDebug("Term_HandleVT100: Hit max? (Len=%i) Flushing cache", Len);
+ st->cache_len = 0;
return 0;
}
- inc_len += new_bytes;
- //_SysDebug("inc_buf = %i '%.*s'", inc_len, inc_len, inc_buf);
+ st->cache_len += new_bytes;
+ assert(st->cache_len > old_inc_len);
- if( inc_len <= 1 )
+ if( st->cache_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;
- case 'D':
- Display_ScrollDown(Term, 1);
- ret = 2;
- break;
- case 'M':
- Display_ScrollDown(Term, -1);
- ret = 2;
- break;
- default:
- ret = 2;
- break;
- }
+ ret = Term_HandleVT100_Short(Term, st->cache_len, st->cache);
if( ret != 0 ) {
- inc_len = 0;
- assert(ret > old_inc_len);
+ // Check that we actually used the new data (as should have happened)
+ if( ret <= old_inc_len ) {
+ _SysDebug("Term_HandleVT100: ret(%i) <= old_inc_len(%i), inc_len=%i, '%*C'",
+ ret, old_inc_len, st->cache_len, st->cache_len, st->cache);
+ ASSERTC(ret, >, old_inc_len);
+ }
+ st->cache_len = 0;
//_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
+ else {
ret = new_bytes;
+ _SysDebug("Term_HandleVT100: Caching %i bytes '%*C'", ret, ret, st->cache);
+ }
return ret;
}
switch( *Buf )
{
+ case '\a':
+ // Alarm, aka bell
+ //Display_SoundBell(Term);
+ break;
case '\b':
+ // backspace is aprarently just supposed to cursor left (if possible)
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");
+ Display_AddText(Term, 1, "\t"); // pass the buck for now
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;
}
+/**
+ * \brief Handle an escape code beginning with '\x1b'
+ * \return 0 : Insufficient data in buffer, wait for more
+ * \return +ve : Number of bytes in escape sequence
+ */
+int Term_HandleVT100_Short(tTerminal *Term, int Len, const char *Buf)
+{
+ 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 ']':
+ tmp = Term_HandleVT100_OSC(Term, Len-2, Buf+2);
+ assert(tmp >= 0);
+ if( tmp == 0 )
+ return 0;
+ return tmp + 2;
+
+ case '#':
+ if( Len == 2 )
+ return 0;
+ switch(Buf[2])
+ {
+ case 8:
+ _SysDebug("TODO \\e#%c DECALN - Fill screen with 'E'", Buf[2]);
+ break;
+ default:
+ _SysDebug("Unknown \\e#%c", Buf[2]);
+ break;
+ }
+ return 3;
+
+ 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;
+ case '7':
+ // Save cursor
+ Display_SaveCursor(Term);
+ return 2;
+ case '8':
+ // Restore cursor
+ Display_RestoreCursor(Term);
+ return 2;
+ case 'D':
+ // Cursor down, if at bottom scroll
+ Display_MoveCursor(Term, 1, 0);
+ // TODO: Scroll if at bottom (impl in _MoveCursor)
+ return 2;
+ case 'E':
+ Display_MoveCursor(Term, 1, INT_MIN);
+ // TODO: Scroll if at bottom (impl in _MoveCursor)
+ return 2;
+ case 'M':
+ // Cursor up, scroll if at top
+ Display_MoveCursor(Term, -1, 0);
+ return 2;
+ default:
+ _SysDebug("Unknown VT100 \\e%c", Buf[1]);
+ return 2;
+ }
+}
+
+/**
+ * \brief Handle CSI escape sequences '\x1b['
+ * \return 0 : insufficient data
+ * \return +ve : Number of bytes consumed
+ */
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};
// Get Arguments
if(j == Len) return 0;
c = Buffer[j++];
- if(c == '?') {
+ if(c == '?')
+ {
bQuestionMark = 1;
if(j == Len) return 0;
c = Buffer[j++];
}
- if( '0' <= c && c <= '9' )
+ if( ('0' <= c && c <= '9') || c == ';' )
{
+ if(c == ';')
+ argc ++;
do {
if(c == ';') {
if(j == Len) return 0;
case 'l': // unset
switch(args[0])
{
+ case 1: // Aplication cursor keys
+ _SysDebug("TODO: \\e[?1%c Application cursor keys", c);
+ break;
+ case 3: // 132 Column mode
+ _SysDebug("TODO: \\e[?3%c 132 Column mode", c);
+ break;
+ case 4: // Smooth (Slow) Scroll
+ _SysDebug("TODO: \\e[?4%c Smooth (Slow) Scroll", c);
+ break;
+ case 5: // Reverse Video
+ _SysDebug("TODO: \\e[?5%c Reverse Video", c);
+ break;
+ case 6: // Origin Mode
+ _SysDebug("TODO: \\e[?6%c Origin Mode", c);
+ break;
+ case 12:
+ //_SysDebug("TODO: \\e[?25%c Start/Stop blinking cursor", c);
+ //Display_SolidCursor(Term, !set);
+ break;
case 25: // Hide cursor
- _SysDebug("TODO: \\e[?25%c Show/Hide cursor", c);
+ //_SysDebug("TODO: \\e[?25%c Show/Hide cursor", c);
+ //Display_ShowCursor(Term, set);
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, -(args[0] != 0 ? args[0] : 1), 0);
+ break;
+ case 'B':
+ Display_MoveCursor(Term, (args[0] != 0 ? args[0] : 1), 0);
+ break;
+ case 'C':
+ Display_MoveCursor(Term, 0, (args[0] != 0 ? args[0] : 1));
+ break;
+ case 'D':
+ Display_MoveCursor(Term, 0, -(args[0] != 0 ? args[0] : 1));
+ break;
case 'H':
- if( argc != 2 ) {
+ if( argc == 0 ) {
+ Display_SetCursor(Term, 0, 0);
}
- else {
- Display_SetCursor(Term, args[0], args[1]);
+ else if( argc == 1 ) {
+ Display_SetCursor(Term, args[0]-1, 0);
+ }
+ else if( argc == 2 ) {
+ // Adjust 1-based cursor position to 0-based
+ Display_SetCursor(Term, args[0]-1, args[1]-1);
}
break;
- case 'J':
+ case 'J': // Clear lines
switch( args[0] )
{
case 0:
+ Display_ClearLines(Term, 1); // Down
+ break;
case 1:
- _SysDebug("TODO: VT100 %i J", args[0]);
+ Display_ClearLines(Term, -1); // Up
break;
- case 2: // Everything
- Display_ClearLines(Term, 0);
+ case 2:
+ Display_ClearLines(Term, 0); // All
break;
default:
_SysDebug("Unknown VT100 %i J", args[0]);
switch( args[0] )
{
case 0: // To EOL
+ Display_ClearLine(Term, 1);
+ break;
case 1: // To SOL
- _SysDebug("TODO: VT100 %i K", args[0]);
+ Display_ClearLine(Term, -1);
break;
case 2:
Display_ClearLine(Term, 0);
_SysDebug("Unknown VT100 %i K", args[0]);
break;
}
- case 'T': // Scroll down n=1
- Display_ScrollDown(Term, 1);
+ break;
+ case 'S': // Scroll text up n=1 (expose bottom)
+ Display_ScrollDown(Term, -(argc >= 1 ? args[0] : 1));
+ break;
+ case 'T': // Scroll text down n=1 (expose top)
+ Display_ScrollDown(Term, (argc >= 1 ? args[0] : 1));
+ break;
+ case 'c': // Send Device Attributes
+ switch(args[0])
+ {
+ case 0: // Request attributes from terminal
+ // "VT100 with Advanced Video Option" (same as screen returns)
+ Display_SendInput(Term, "\x1b[?1;2c");
+ break;
+ default:
+ _SysDebug("TODO: Request device attributes \\e[%ic", args[0]);
+ break;
+ }
+ break;
+ case 'f':
+ if( argc != 2 ) {
+ Display_SetCursor(Term, 0, 0);
+ }
+ else {
+ // Adjust 1-based cursor position to 0-based
+ Display_SetCursor(Term, args[0]-1, args[1]-1);
+ }
+ break;
+ case 'h':
+ case 'l':
+ for( int i = 0; i < argc; i ++ )
+ {
+ switch(args[i])
+ {
+ default:
+ _SysDebug("Unknown VT100 mode \e[%i%c",
+ args[i], c);
+ break;
+ }
+ }
break;
case 'm':
if( argc == 0 )
{
// Reset
+ Display_ResetAttributes(Term);
+ }
+ else if( args[0] == 48 )
+ {
+ // ISO-8613-3 Background
+ if( args[1] == 2 ) {
+ uint32_t col = 0;
+ col |= (uint32_t)args[2] << 16;
+ col |= (uint32_t)args[3] << 8;
+ col |= (uint32_t)args[4] << 0;
+ Display_SetBackground(Term, col);
+ }
+ else if( args[1] == 5 ) {
+ _SysDebug("TODO: Support xterm palette BG %i", args[2]);
+ }
+ else {
+ _SysDebug("VT100 Unknown mode set \e[48;%im", args[1]);
+ }
+ }
+ else if( args[0] == 38 )
+ {
+ // ISO-8613-3 Foreground
+ if( args[1] == 2 ) {
+ uint32_t col = 0;
+ col |= (uint32_t)args[2] << 16;
+ col |= (uint32_t)args[3] << 8;
+ col |= (uint32_t)args[4] << 0;
+ Display_SetForeground(Term, col);
+ }
+ else if( args[1] == 5 ) {
+ _SysDebug("TODO: Support xterm palette FG %i", args[2]);
+ }
+ else {
+ _SysDebug("VT100 Unknown mode set \e[38;%im", args[1]);
+ }
}
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 )
+ switch(args[i])
{
- // TODO: Bold/bright
- Display_SetForeground( Term, caVT100Colours[ args[i]-30 ] );
- }
- else if( 40 <= args[i] && args[i] <= 47 )
- {
- // 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: \\e[2m - Reverse");
+ break;
+ case 4:
+ _SysDebug("TODO: \\e[4m - Underscore");
+ break;
+ //case 5:
+ // _SysDebug("TODO: \\e[5m - Blink/bold");
+ // break;
+ case 7:
+ _SysDebug("TODO: \\e[7m - Reverse");
+ break;
+ case 24: // Not underlined
+ case 27: // Not inverse
+ 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;
+ case 90 ... 97:
+ st->CurFG = args[i]-90 + 8;
+ Display_SetForeground( Term, caVT100Colours[ st->CurBG ] );
+ break;;
+ case 100 ... 107:
+ st->CurBG = args[i]-100 + 8;
+ Display_SetBackground( Term, caVT100Colours[ st->CurBG ] );
+ break;;
+ default:
+ _SysDebug("Unknown mode set \\e[%im", args[i]);
+ break;
}
}
}
break;
+ // Device Status Report
+ case 'n':
+ break;
// Set scrolling region
case 'r':
- Display_SetScrollArea(Term, args[0], args[1]);
+ Display_SetScrollArea(Term, args[0]-1, (args[1] - args[0])+1);
break;
case 's':
}
return j;
}
+
+int Term_HandleVT100_OSC(tTerminal *Term, int Len, const char *Buf)
+{
+ tVT100State *st = Display_GetTermState(Term);
+
+ int ofs = 0;
+ // OSC Ps ; Pt [ST/BEL]
+ if(Len < 2) return 0; // Need moar
+
+ int Ps = 0;
+ while( ofs < Len && isdigit(Buf[ofs]) ) {
+ Ps = Ps * 10 + (Buf[ofs] - '0');
+ ofs ++;
+ }
+
+ if( ofs == Len ) return 0;
+ if( Buf[ofs] != ';' ) {
+ // Error
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_IGNORE;
+ return ofs;
+ }
+ ofs ++;
+
+ switch(Ps)
+ {
+ case 0: // Icon Name + Window Title
+ case 1: // Icon Name
+ case 2: // Window Title
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_TITLE;
+ break;
+ case 3: // Set X Property
+ _SysDebug("TODO: \\e]3; Support X properties");
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_IGNORE;
+ break;
+ case 4: // Change colour number
+ case 5: // Change special colour number
+ _SysDebug("TODO: \\e]%i;c; Support X properties", Ps);
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_IGNORE;
+ break;
+ case 10: // Change foreground to Pt
+ case 11: // Change background to Pt
+ case 52:
+ // TODO: Can be Pt = [cps01234567]*;<str>
+ // > Clipboard data in base-64, cut/primary/select buffers 0-7
+ // > <str>='?' returns the clipbard in the same format
+ default:
+ _SysDebug("Unknown VT100 OSC \\e]%i;", Ps);
+ st->Mode = MODE_STRING;
+ st->StringType = STRING_IGNORE;
+ break;
+ }
+ return ofs;
+}
+
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