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st.c
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/* See LICENSE for licence details. */
#define _XOPEN_SOURCE 600
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <input_handler.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_thread.h>
#include <SDL2/SDL_ttf.h>
#define Glyph Glyph_
#define Font Font_
#if defined(__linux)
#include <pty.h>
#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
#include <util.h>
#elif defined(__FreeBSD__) || defined(__DragonFly__)
#include <libutil.h>
#elif defined(__QNXNTO__)
#include <unix.h>
#endif
#define USAGE \
"st " VERSION " (c) 2010-2012 st engineers\n" \
"(c) 2018 Kufat\n" \
"usage: st [-c class] [-f font] [-o file]" \
" [-e command ...]\n"
/* Arbitrary sizes */
#define ESC_BUF_SIZ 256
#define ESC_ARG_SIZ 16
#define STR_BUF_SIZ 256
#define STR_ARG_SIZ 16
#define DRAW_BUF_SIZ 20*1024
#define UTF_SIZ 4
#define XK_NO_MOD UINT_MAX
#define XK_ANY_MOD 0
#define REDRAW_TIMEOUT (80*1000) /* 80 ms */
/* macros */
#define CLEANMASK(mask) (mask & (KMOD_SHIFT|KMOD_CTRL|KMOD_ALT))
#define SERRNO strerror(errno)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#define LEN(a) (sizeof(a) / sizeof(a[0]))
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
#define IS_SET(flag) (term.mode & (flag))
#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
#define VT102ID "\033[?6c"
enum glyph_attribute {
ATTR_NULL = 0,
ATTR_REVERSE = 1,
ATTR_UNDERLINE = 2,
ATTR_BOLD = 4,
ATTR_GFX = 8,
ATTR_ITALIC = 16,
ATTR_BLINK = 32
};
enum cursor_movement {
CURSOR_UP,
CURSOR_DOWN,
CURSOR_LEFT,
CURSOR_RIGHT,
CURSOR_SAVE,
CURSOR_LOAD
};
enum cursor_state {
CURSOR_DEFAULT = 0,
CURSOR_HIDE = 1,
CURSOR_WRAPNEXT = 2
};
enum glyph_state {
GLYPH_SET = 1,
GLYPH_DIRTY = 2
};
enum term_mode {
MODE_WRAP = 1,
MODE_INSERT = 2,
MODE_APPKEYPAD = 4,
MODE_ALTSCREEN = 8,
MODE_CRLF = 16,
MODE_MOUSEBTN = 32,
MODE_MOUSEMOTION = 64,
MODE_MOUSE = 32|64,
MODE_REVERSE = 128,
MODE_KBDLOCK = 256
};
enum escape_state {
ESC_START = 1,
ESC_CSI = 2,
ESC_STR = 4, /* DSC, OSC, PM, APC */
ESC_ALTCHARSET = 8,
ESC_STR_END = 16, /* a final string was encountered */
ESC_TEST = 32 /* Enter in test mode */
};
enum window_state {
WIN_VISIBLE = 1,
WIN_REDRAW = 2,
WIN_FOCUSED = 4
};
/* bit macro */
#undef B0
enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned short ushort;
typedef struct {
char c[UTF_SIZ]; /* character code */
uchar mode; /* attribute flags */
ushort fg; /* foreground */
ushort bg; /* background */
uchar state; /* state flags */
} Glyph;
typedef Glyph* Line;
typedef struct {
Glyph attr; /* current char attributes */
int x;
int y;
char state;
} TCursor;
/* CSI Escape sequence structs */
/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char priv;
int arg[ESC_ARG_SIZ];
int narg; /* nb of args */
char mode;
} CSIEscape;
/* STR Escape sequence structs */
/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
typedef struct {
char type; /* ESC type ... */
char buf[STR_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char *args[STR_ARG_SIZ];
int narg; /* nb of args */
} STREscape;
/* Internal representation of the screen */
typedef struct {
int row; /* nb row */
int col; /* nb col */
Line *line; /* screen */
Line *alt; /* alternate screen */
bool *dirty; /* dirtyness of lines */
TCursor c; /* cursor */
int top; /* top scroll limit */
int bot; /* bottom scroll limit */
int mode; /* terminal mode flags */
int esc; /* escape state flags */
bool *tabs;
} Term;
/* Purely graphic info */
typedef struct {
//Colormap cmap;
SDL_Surface *surface;
SDL_Window *window;
int scr;
int tw, th; /* tty width and height */
int w; /* window width */
int h; /* window height */
int ch; /* char height */
int cw; /* char width */
char state; /* focus, redraw, visible */
} XWindow;
typedef struct {
SDL_Keycode k;
uint16_t mask;
char s[ESC_BUF_SIZ];
} Key;
typedef union {
int i;
unsigned int ui;
float f;
const void *v;
} Arg;
typedef struct {
uint16_t mask;
SDL_Keycode k;
void (*func)(const Arg *);
const Arg arg;
} Shortcut;
/* function definitions used in config.h */
static void xzoom(const Arg *);
/* Config.h for applying patches and the configuration. */
#include "config.h"
/* Drawing Context */
typedef struct {
SDL_Color colors[LEN(colormap) < 256 ? 256 : LEN(colormap)];
TTF_Font *font, *ifont, *bfont, *ibfont;
} DC;
static void die(const char *, ...);
static void draw(void);
static void redraw(void);
static void drawregion(int, int, int, int);
static void execsh(void);
static void sigchld(int);
static void run(void);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
static void strdump(void);
static void strhandle(void);
static void strparse(void);
static void strreset(void);
static void tclearregion(int, int, int, int);
static void tcursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
static void tinsertblank(int);
static void tinsertblankline(int);
static void tmoveto(int, int);
static void tnew(int, int);
static void tnewline(int);
static void tputtab(bool);
static void tputc(char *, int);
static void treset(void);
static int tresize(int, int);
static void tscrollup(int, int);
static void tscrolldown(int, int);
static void tsetattr(int*, int);
static void tsetchar(char *, Glyph *, int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetdirt(int, int);
static void tsetmode(bool, bool, int *, int);
static void tfulldirt(void);
static void ttynew(void);
static void ttyread(void);
static void ttyresize(void);
static void ttywrite(const char *, size_t);
static void xdraws(char *, Glyph, int, int, int, int);
static void xclear(int, int, int, int);
static void xdrawcursor(void);
static void sdlinit(void);
static void initcolormap(void);
static void sdltermclear(int, int, int, int);
static void expose(SDL_Event *);
static char *kmap(SDL_Keycode, SDL_Keymod);
static void kpress(SDL_Event *);
static void cresize();
static int utf8decode(char *, long *);
static int utf8encode(long *, char *);
static int utf8size(char *);
static int isfullutf8(char *, int);
static ssize_t xwrite(int, char *, size_t);
static void *xmalloc(size_t);
static void *xrealloc(void *, size_t);
static void *xcalloc(size_t nmemb, size_t size);
static void xflip(void);
/* Globals */
static DC dc;
static XWindow xw;
static Term term;
static CSIEscape csiescseq;
static STREscape strescseq;
static int cmdfd;
static pid_t pid;
static int iofd = -1;
static char **opt_cmd = NULL;
static char *opt_io = NULL;
static char *opt_title = NULL;
static char *opt_font = NULL;
static char *usedfont = NULL;
static int usedfontsize = 0;
bool exitThread = false;
ssize_t
xwrite(int fd, char *s, size_t len) {
size_t aux = len;
while(len > 0) {
ssize_t r = write(fd, s, len);
if(r < 0)
return r;
len -= r;
s += r;
}
return aux;
}
void *
xmalloc(size_t len) {
void *p = malloc(len);
if(!p)
die("Out of memory\n");
return p;
}
void *
xrealloc(void *p, size_t len) {
if((p = realloc(p, len)) == NULL)
die("Out of memory\n");
return p;
}
void *
xcalloc(size_t nmemb, size_t size) {
void *p = calloc(nmemb, size);
if(!p)
die("Out of memory\n");
return p;
}
void
xflip(void) {
SDL_UpdateWindowSurface(xw.window);
}
int
utf8decode(char *s, long *u) {
uchar c;
int i, n, rtn;
rtn = 1;
c = *s;
if(~c & B7) { /* 0xxxxxxx */
*u = c;
return rtn;
} else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
*u = c&(B4|B3|B2|B1|B0);
n = 1;
} else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
*u = c&(B3|B2|B1|B0);
n = 2;
} else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
*u = c & (B2|B1|B0);
n = 3;
} else {
goto invalid;
}
for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
c = *s;
if((c & (B7|B6)) != B7) /* 10xxxxxx */
goto invalid;
*u <<= 6;
*u |= c & (B5|B4|B3|B2|B1|B0);
}
if((n == 1 && *u < 0x80) ||
(n == 2 && *u < 0x800) ||
(n == 3 && *u < 0x10000) ||
(*u >= 0xD800 && *u <= 0xDFFF)) {
goto invalid;
}
return rtn;
invalid:
*u = 0xFFFD;
return rtn;
}
int
utf8encode(long *u, char *s) {
uchar *sp;
ulong uc;
int i, n;
sp = (uchar *)s;
uc = *u;
if(uc < 0x80) {
*sp = uc; /* 0xxxxxxx */
return 1;
} else if(*u < 0x800) {
*sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
n = 1;
} else if(uc < 0x10000) {
*sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
n = 2;
} else if(uc <= 0x10FFFF) {
*sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
n = 3;
} else {
goto invalid;
}
for(i=n,++sp; i>0; --i,++sp)
*sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
return n+1;
invalid:
/* U+FFFD */
*s++ = '\xEF';
*s++ = '\xBF';
*s = '\xBD';
return 3;
}
/* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
UTF-8 otherwise return 0 */
int
isfullutf8(char *s, int b) {
uchar *c1, *c2, *c3;
c1 = (uchar *)s;
c2 = (uchar *)++s;
c3 = (uchar *)++s;
if(b < 1) {
return 0;
} else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
return 0;
} else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
((b == 1) ||
((b == 2) && (*c2&(B7|B6)) == B7))) {
return 0;
} else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
((b == 1) ||
((b == 2) && (*c2&(B7|B6)) == B7) ||
((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
return 0;
} else {
return 1;
}
}
int
utf8size(char *s) {
uchar c = *s;
if(~c&B7) {
return 1;
} else if((c&(B7|B6|B5)) == (B7|B6)) {
return 2;
} else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
return 3;
} else {
return 4;
}
}
void
die(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
bool
is_word_break(char c) {
static char *word_break = WORD_BREAK;
char *s = word_break;
while(*s) {
if(*s == c) return true;
s++;
}
return false;
}
void
execsh(void) {
char **args;
char *envshell = getenv("SHELL");
const struct passwd *pass = getpwuid(getuid());
unsetenv("COLUMNS");
unsetenv("LINES");
unsetenv("TERMCAP");
if(pass) {
setenv("LOGNAME", pass->pw_name, 1);
setenv("USER", pass->pw_name, 1);
setenv("SHELL", pass->pw_shell, 0);
setenv("HOME", pass->pw_dir, 0);
}
signal(SIGCHLD, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGALRM, SIG_DFL);
DEFAULT(envshell, shell);
setenv("TERM", termname, 1);
args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
execvp(args[0], args);
exit(EXIT_FAILURE);
}
void
sigchld(int a) {
int stat = 0;
(void)a;
if(waitpid(pid, &stat, 0) < 0)
die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
if(WIFEXITED(stat)) {
exit(WEXITSTATUS(stat));
} else {
exit(EXIT_FAILURE);
}
}
void
ttynew(void) {
int m, s;
struct winsize w = {term.row, term.col, 0, 0};
/* seems to work fine on linux, openbsd and freebsd */
if(openpty(&m, &s, NULL, NULL, &w) < 0)
die("openpty failed: %s\n", SERRNO);
switch(pid = fork()) {
case -1:
die("fork failed\n");
break;
case 0:
setsid(); /* create a new process group */
dup2(s, STDIN_FILENO);
dup2(s, STDOUT_FILENO);
dup2(s, STDERR_FILENO);
if(ioctl(s, TIOCSCTTY, NULL) < 0)
die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
close(s);
close(m);
execsh();
break;
default:
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
if(opt_io) {
iofd = (!strcmp(opt_io, "-")) ?
STDOUT_FILENO :
open(opt_io, O_WRONLY | O_CREAT, 0666);
if(iofd < 0) {
fprintf(stderr, "Error opening %s:%s\n",
opt_io, strerror(errno));
}
}
}
}
void
dump(char c) {
static int col;
fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
if(++col % 10 == 0)
fprintf(stderr, "\n");
}
void
ttyread(void) {
static char buf[BUFSIZ];
static int buflen = 0;
char *ptr;
char s[UTF_SIZ];
int charsize; /* size of utf8 char in bytes */
long utf8c;
int ret;
/* append read bytes to unprocessed bytes */
if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
die("Couldn't read from shell: %s\n", SERRNO);
/* process every complete utf8 char */
buflen += ret;
ptr = buf;
while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
charsize = utf8decode(ptr, &utf8c);
utf8encode(&utf8c, s);
//DEBUG fprintf(stderr, "%.*s", charsize, s);
tputc(s, charsize);
ptr += charsize;
buflen -= charsize;
}
/* keep any uncomplete utf8 char for the next call */
memmove(buf, ptr, buflen);
}
void
ttywrite(const char *s, size_t n) {
if(write(cmdfd, s, n) == -1)
die("write error on tty: %s\n", SERRNO);
}
void
ttyresize(void) {
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = xw.tw;
w.ws_ypixel = xw.th;
if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
}
void
tsetdirt(int top, int bot) {
int i;
LIMIT(top, 0, term.row-1);
LIMIT(bot, 0, term.row-1);
for(i = top; i <= bot; i++)
term.dirty[i] = 1;
}
void
tfulldirt(void) {
tsetdirt(0, term.row-1);
}
void
tcursor(int mode) {
static TCursor c;
if(mode == CURSOR_SAVE) {
c = term.c;
} else if(mode == CURSOR_LOAD) {
term.c = c;
tmoveto(c.x, c.y);
}
}
void
treset(void) {
uint i;
term.c = (TCursor){{
.mode = ATTR_NULL,
.fg = defaultfg,
.bg = defaultbg
}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
for(i = tabspaces; i < term.col; i += tabspaces)
term.tabs[i] = 1;
term.top = 0;
term.bot = term.row - 1;
term.mode = MODE_WRAP;
tclearregion(0, 0, term.col-1, term.row-1);
}
void
tnew(int col, int row) {
/* set screen size */
term.row = row;
term.col = col;
term.line = xmalloc(term.row * sizeof(Line));
term.alt = xmalloc(term.row * sizeof(Line));
term.dirty = xmalloc(term.row * sizeof(*term.dirty));
term.tabs = xmalloc(term.col * sizeof(*term.tabs));
for(row = 0; row < term.row; row++) {
term.line[row] = xmalloc(term.col * sizeof(Glyph));
term.alt [row] = xmalloc(term.col * sizeof(Glyph));
term.dirty[row] = 0;
}
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
/* setup screen */
treset();
}
void
tswapscreen(void) {
Line *tmp = term.line;
term.line = term.alt;
term.alt = tmp;
term.mode ^= MODE_ALTSCREEN;
tfulldirt();
}
void
tscrolldown(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
for(i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = temp;
term.dirty[i] = 1;
term.dirty[i-n] = 1;
}
}
void
tscrollup(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, orig, term.col-1, orig+n-1);
for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = temp;
term.dirty[i] = 1;
term.dirty[i+n] = 1;
}
}
void
tnewline(int first_col) {
int y = term.c.y;
if(y == term.bot) {
tscrollup(term.top, 1);
} else {
y++;
}
tmoveto(first_col ? 0 : term.c.x, y);
}
void
csiparse(void) {
/* int noarg = 1; */
char *p = csiescseq.buf;
csiescseq.narg = 0;
if(*p == '?')
csiescseq.priv = 1, p++;
while(p < csiescseq.buf+csiescseq.len) {
while(isdigit(*p)) {
csiescseq.arg[csiescseq.narg] *= 10;
csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
}
if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
csiescseq.narg++, p++;
} else {
csiescseq.mode = *p;
csiescseq.narg++;
return;
}
}
}
void
tmoveto(int x, int y) {
LIMIT(x, 0, term.col-1);
LIMIT(y, 0, term.row-1);
term.c.state &= ~CURSOR_WRAPNEXT;
term.c.x = x;
term.c.y = y;
}
void
tsetchar(char *c, Glyph *attr, int x, int y) {
static char *vt100_0[62] = { /* 0x41 - 0x7e */
"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
"", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
};
/*
* The table is proudly stolen from rxvt.
*/
if(attr->mode & ATTR_GFX) {
if(c[0] >= 0x41 && c[0] <= 0x7e
&& vt100_0[c[0] - 0x41]) {
c = vt100_0[c[0] - 0x41];
}
}
term.dirty[y] = 1;
term.line[y][x] = *attr;
memcpy(term.line[y][x].c, c, UTF_SIZ);
term.line[y][x].state |= GLYPH_SET;
}
void
tclearregion(int x1, int y1, int x2, int y2) {
int x, y, temp;
if(x1 > x2)
temp = x1, x1 = x2, x2 = temp;
if(y1 > y2)
temp = y1, y1 = y2, y2 = temp;
LIMIT(x1, 0, term.col-1);
LIMIT(x2, 0, term.col-1);
LIMIT(y1, 0, term.row-1);
LIMIT(y2, 0, term.row-1);
for(y = y1; y <= y2; y++) {
term.dirty[y] = 1;
for(x = x1; x <= x2; x++)
term.line[y][x].state = 0;
}
}
void
tdeletechar(int n) {
int src = term.c.x + n;
int dst = term.c.x;
int size = term.col - src;
term.dirty[term.c.y] = 1;
if(src >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
size * sizeof(Glyph));
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
}
void
tinsertblank(int n) {
int src = term.c.x;
int dst = src + n;
int size = term.col - dst;
term.dirty[term.c.y] = 1;
if(dst >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
size * sizeof(Glyph));
tclearregion(src, term.c.y, dst - 1, term.c.y);
}
void
tinsertblankline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
tscrollup(term.c.y, n);
}
void
tsetattr(int *attr, int l) {
int i;
for(i = 0; i < l; i++) {
switch(attr[i]) {
case 0:
term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
| ATTR_ITALIC | ATTR_BLINK);
term.c.attr.fg = defaultfg;
term.c.attr.bg = defaultbg;
break;
case 1:
term.c.attr.mode |= ATTR_BOLD;
break;
case 3: /* enter standout (highlight) */
term.c.attr.mode |= ATTR_ITALIC;
break;
case 4:
term.c.attr.mode |= ATTR_UNDERLINE;
break;
case 5:
term.c.attr.mode |= ATTR_BLINK;
break;
case 7:
term.c.attr.mode |= ATTR_REVERSE;
break;
case 21:
case 22:
term.c.attr.mode &= ~ATTR_BOLD;
break;
case 23: /* leave standout (highlight) mode */
term.c.attr.mode &= ~ATTR_ITALIC;
break;
case 24:
term.c.attr.mode &= ~ATTR_UNDERLINE;
break;
case 25:
term.c.attr.mode &= ~ATTR_BLINK;
break;
case 27:
term.c.attr.mode &= ~ATTR_REVERSE;
break;
case 38:
if(i + 2 < l && attr[i + 1] == 5) {
i += 2;
if(BETWEEN(attr[i], 0, 255)) {
term.c.attr.fg = attr[i];
} else {
fprintf(stderr,
"erresc: bad fgcolor %d\n",
attr[i]);
}
} else {
fprintf(stderr,
"erresc(38): gfx attr %d unknown\n",
attr[i]);
}
break;
case 39:
term.c.attr.fg = defaultfg;
break;
case 48:
if(i + 2 < l && attr[i + 1] == 5) {
i += 2;
if(BETWEEN(attr[i], 0, 255)) {
term.c.attr.bg = attr[i];
} else {
fprintf(stderr,
"erresc: bad bgcolor %d\n",
attr[i]);
}