Improve these comments a bit.

[nmh] / sbr / terminal.c

diff --git a/sbr/terminal.c b/sbr/terminal.c
index 4b29cace8d8db15f89229a87b8385a3475897c5e..5ba6dcd115dceb695a5de794812283aedb6283d3 100644 (file)
--- a/sbr/terminal.c
+++ b/sbr/terminal.c
@@ -8,94 +8,64 @@
  */
 
 #include <h/mh.h>
  */
 
 #include <h/mh.h>

+#include <h/utils.h>

 
 

-#include <termios.h>
-
-/* It might be better to tie this to the termcap_curses_order in
-   configure.ac.  It would be fine to check for ncurses/termcap.h
-   first on Linux, it's a symlink to termcap.h.  */
-#ifdef HAVE_TERMCAP_H
-# include <termcap.h>
-#elif defined (HAVE_NCURSES_TERMCAP_H)
-# include <ncurses/termcap.h>
-#endif
+#include <sys/ioctl.h>

 
 

-/* <sys/ioctl.h> is need anyway for ioctl()
-#ifdef GWINSZ_IN_SYS_IOCTL
-*/
-# include <sys/ioctl.h>
-/*
-#endif
-*/
+#include <curses.h>
+#include <term.h>
+#include <termios.h>

 
 #ifdef WINSIZE_IN_PTEM
 # include <sys/stream.h>
 # include <sys/ptem.h>
 #endif
 
 
 #ifdef WINSIZE_IN_PTEM
 # include <sys/stream.h>
 # include <sys/ptem.h>
 #endif
 

-#if BUFSIZ<2048
-# define TXTSIZ        2048
-#else
-# define TXTSIZ BUFSIZ
-#endif
-
-static long speedcode;
-

 static int initLI = 0;
 static int initCO = 0;
 
 static int initLI = 0;
 static int initCO = 0;
 

-static int LI = 40;      /* number of lines                       */
-static int CO = 80;      /* number of colums                      */
-static char *CL = NULL;  /* termcap string to clear screen        */
-static char *SE = NULL;  /* termcap string to end standout mode   */
-static char *SO = NULL;  /* termcap string to begin standout mode */
+static int LI = 40;                /* number of lines                        */
+static int CO = 80;                /* number of colums                       */
+static char *ti_clear = NULL;      /* terminfo string to clear screen        */
+static char *ti_standend = NULL;   /* terminfo string to end standout mode   */
+static char *ti_standbegin = NULL; /* terminfo string to begin standout mode */
+static int termstatus = 0;        /* terminfo initialization status         */
+static char *termcbuf = NULL;     /* tputs() output buffer                  */
+static char *termcbufp = NULL;    /* tputs() output buffer pointer          */
+static size_t termcbufsz = 0;     /* Size of termcbuf                       */

 
 

-static char termcap[TXTSIZ];
+static void initialize_terminfo(void);
+static int termbytes(TPUTS_PUTC_ARG);

 
 

+/*
+ * Initialize the terminfo library.
+ */

 
 static void
 
 static void

-read_termcap(void)
+initialize_terminfo(void)

 {
 {

-    char *cp;
-    char *term;
+    int errret, rc;

 
 

-#ifndef TGETENT_ACCEPTS_NULL
-    char termbuf[TXTSIZ];
-#endif
+    if (termstatus)
+       return;

 
 

-    struct termios tio;
-    static int inited = 0;
+    rc = setupterm(NULL, fileno(stdout), &errret);

 
 

-    if (inited++)
-       return;
-
-    if (!(term = getenv ("TERM")))
-       return;
-
-/*
- * If possible, we let tgetent allocate its own termcap buffer
- */
-#ifdef TGETENT_ACCEPTS_NULL
-    if (tgetent (NULL, term) != TGETENT_SUCCESS)
-       return;
-#else
-    if (tgetent (termbuf, term) != TGETENT_SUCCESS)
+    if (rc != 0 || errret != 1) {
+       termstatus = -1;

        return;
        return;

-#endif
-
-    speedcode = cfgetospeed(&tio);
+    } else {
+       termstatus = 1;
+    }

 
 

-    if (!initCO && (CO = tgetnum ("co")) <= 0)
+    if (!initCO && (CO = tigetnum ("cols")) <= 0)

        CO = 80;
        CO = 80;

-    if (!initLI && (LI = tgetnum ("li")) <= 0)
+    if (!initLI && (LI = tigetnum ("lines")) <= 0)

        LI = 24;
 
        LI = 24;
 

-    cp = termcap;
-    CL = tgetstr ("cl", &cp);
-    if (tgetnum ("sg") <= 0) {
-       SE = tgetstr ("se", &cp);
-       SO = tgetstr ("so", &cp);
-    }
+    ti_clear = tigetstr ("clear");
+    ti_standbegin = tigetstr ("smso");
+    ti_standend = tigetstr ("rmso");

 }
 
 
 }
 
 


@@ -112,7 +82,7 @@ sc_width (void)
        initCO++;
     } else
 #endif /* TIOCGWINSZ */
        initCO++;
     } else
 #endif /* TIOCGWINSZ */

-       read_termcap();
+       initialize_terminfo();

 
     return CO;
 }
 
     return CO;
 }


@@ -129,30 +99,28 @@ sc_length (void)
        initLI++;
     else
 #endif /* TIOCGWINSZ */
        initLI++;
     else
 #endif /* TIOCGWINSZ */

-       read_termcap();
+       initialize_terminfo();

 
     return LI;
 }
 
 
 static int
 
     return LI;
 }
 
 
 static int

-outc (int c)
+outc (TPUTS_PUTC_ARG c)

 {
     return putchar(c);
 }
 
 
 void
 {
     return putchar(c);
 }
 
 
 void

-clear_screen (void)
+nmh_clear_screen (void)

 {
 {

-    read_termcap ();
+    initialize_terminfo ();

 
 

-    if (CL && speedcode)
-       tputs (CL, LI, outc);
+    if (ti_clear)
+       tputs (ti_clear, LI, outc);

     else {
        printf ("\f");
     else {
        printf ("\f");

-       if (speedcode)
-           printf ("\200");

     }
 
     fflush (stdout);
     }
 
     fflush (stdout);


@@ -167,18 +135,118 @@ SOprintf (char *fmt, ...)
 {
     va_list ap;
 
 {
     va_list ap;
 

-    read_termcap ();
-    if (!(SO && SE))
+    initialize_terminfo ();
+    if (!(ti_standbegin && ti_standend))

        return NOTOK;
 
        return NOTOK;
 

-    tputs (SO, 1, outc);
+    tputs (ti_standbegin, 1, outc);

 
     va_start(ap, fmt);
     vprintf (fmt, ap);
     va_end(ap);
 
 
     va_start(ap, fmt);
     vprintf (fmt, ap);
     va_end(ap);
 

-    tputs (SE, 1, outc);
+    tputs (ti_standend, 1, outc);

 
     return OK;
 }
 
 
     return OK;
 }
 

+/*
+ * Return the specified capability as a string that has already been
+ * processed with tputs().
+ */
+
+char *
+get_term_stringcap(char *capability)
+{
+    char *parm;
+
+    initialize_terminfo();
+
+    if (termstatus == -1)
+       return NULL;
+
+    termcbufp = termcbuf;
+
+    parm = tigetstr(capability);
+
+    if (parm == (char *) -1 || parm == NULL) {
+       return NULL;
+    }
+
+    tputs(parm, 1, termbytes);
+
+    *termcbufp = '\0';
+
+    return termcbuf;
+}
+
+/*
+ * Return a parameterized terminfo capability
+ */
+
+char *
+get_term_stringparm(char *capability, long arg1, long arg2)
+{
+    char *parm;
+
+    initialize_terminfo();
+
+    if (termstatus == -1)
+       return NULL;
+
+    termcbufp = termcbuf;
+
+    parm = tigetstr(capability);
+
+    if (parm == (char *) -1 || parm == NULL) {
+       return NULL;
+    }
+
+    parm = tparm(parm, arg1, arg2, 0, 0, 0, 0, 0, 0, 0);
+
+    tputs(parm, 1, termbytes);
+
+    *termcbufp = '\0';
+
+    return termcbuf;
+}
+
+/*
+ * Return the value of the specified numeric capability
+ */
+
+int
+get_term_numcap(char *capability)
+{
+    initialize_terminfo();
+
+    if (termstatus == -1)
+       return -1;
+
+    return tigetnum(capability);
+}
+
+/*
+ * Store a sequence of characters in our local buffer
+ */
+
+static int
+termbytes(TPUTS_PUTC_ARG c)
+{
+    size_t offset;
+
+    /*
+     * Bump up the buffer size if we've reached the end (leave room for
+     * a trailing NUL)
+     */
+
+    if ((offset = termcbufp - termcbuf) - 1 >= termcbufsz) {
+        termcbufsz += 64;
+       termcbuf = mh_xrealloc(termcbuf, termcbufsz);
+       termcbufp = termcbuf + offset;
+    }
+
+    *termcbufp++ = c;
+
+    return 0;
+}