st now runs on Linux, OpenBSD and FreeBSD.

[st.git] / st.c

diff --git a/st.c b/st.c
index 9667dbd..9ca032f 100644 (file)
--- a/st.c
+++ b/st.c
@@ -20,6 +20,14 @@
 #include <X11/keysym.h>
 #include <X11/Xutil.h>
 
+#if   defined(LINUX)
+ #include <pty.h>
+#elif defined(OPENBSD)
+ #include <util.h>
+#elif defined(FREEBSD)
+ #include <libutil.h>
+#endif
+
 /* Arbitrary sizes */
 #define ESC_TITLE_SIZ 256
 #define ESC_BUF_SIZ   256
@@ -34,7 +42,7 @@
 #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 IS_SET(flag) (term.mode & (flag))
 
 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
@@ -129,7 +137,6 @@ static void csireset(void);
 
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
-static void twrapcursor(void);
 static void tdeletechar(int);
 static void tdeleteline(int);
 static void tinsertblank(int);
@@ -243,19 +250,12 @@ sigchld(int a) {
 void
 ttynew(void) {
        int m, s;
-       char *pts;
-
-       if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
-               die("openpt failed: %s\n", SERRNO);
-       if(grantpt(m) < 0)
-               die("grantpt failed: %s\n", SERRNO);
-       if(unlockpt(m) < 0)
-               die("unlockpt failed: %s\n", SERRNO);
-       if(!(pts = ptsname(m)))
-               die("ptsname failed: %s\n", SERRNO);
-       if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
-               die("Couldn't open slave: %s\n", SERRNO);
-       fcntl(s, F_SETFL, O_NDELAY);
+       
+       /* seems to work fine on linux, openbsd and freebsd */
+       struct winsize w = {term.row, term.col, 0, 0};
+       if(openpty(&m, &s, NULL, NULL, &w) < 0)
+               die("openpty failed: %s\n", SERRNO);
+
        switch(pid = fork()) {
        case -1:
                die("fork failed\n");
@@ -337,7 +337,8 @@ treset(void) {
 }
 
 void
-tnew(int col, int row) {   /* screen size */
+tnew(int col, int row) {
+       /* screen size */
        term.row = row, term.col = col;
        term.top = 0, term.bot = term.row - 1;
        /* mode */
@@ -437,16 +438,6 @@ tmoveto(int x, int y) {
        term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 }
 
-void
-twrapcursor(void) {
-       int y = term.c.y+1;
-       if(y > term.bot) {
-               tmoveto(0, term.bot);
-               tscroll();
-       } else 
-               tmoveto(0, y);
-}
-       
 void
 tsetchar(char c) {
        term.line[term.c.y][term.c.x] = term.c.attr;
@@ -974,7 +965,7 @@ tputc(char c) {
                        if(term.c.x+1 < term.col) {
                                tmoveto(term.c.x+1, term.c.y);
                        } else if(IS_SET(MODE_WRAP))
-                               twrapcursor();
+                               tnewline();
                        break;
                }
        }
@@ -995,13 +986,20 @@ tresize(int col, int row) {
        if(col < 1 || row < 1)
                return;
 
+       /* free uneeded rows */
        for(i = row; i < term.row; i++)
                free(term.line[i]);
+
+       /* resize to new height */
        term.line = realloc(term.line, row * sizeof(Line));
+
+       /* resize each row to new width, zero-pad if needed */
        for(i = 0; i < minrow; i++) {
                term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
                memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
        }
+
+       /* allocate any new rows */
        for(/* i == minrow */; i < row; i++)
                term.line[i] = calloc(col, sizeof(Glyph));
        
@@ -1081,10 +1079,9 @@ xhints(void)
 
 void
 xinit(void) {
-       xw.dis = XOpenDisplay(NULL);
-       xw.scr = XDefaultScreen(xw.dis);
-       if(!xw.dis)
+       if(!(xw.dis = XOpenDisplay(NULL)))
                die("Can't open display\n");
+       xw.scr = XDefaultScreen(xw.dis);
        
        /* font */
        if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
@@ -1337,7 +1334,7 @@ run(void) {
 int
 main(int argc, char *argv[]) {
        if(argc == 2 && !strncmp("-v", argv[1], 3))
-               die("st-" VERSION ", © 2009 st engineers\n");
+               die("st-" VERSION ", (c) 2010 st engineers\n");
        else if(argc != 1)
                die("usage: st [-v]\n");
        setlocale(LC_CTYPE, "");