Add support for Windows

Ported termkey for windows:

- A new CFLAG HAVE_TERMIOS controls the use of termios.h. If it is not
  available TERMKEY_FLAG_NOTERMIOS is ignored. By default it is set for
  the Makefile.
- The termkey_waitkey() function is not implemented in windows, since there
  is no poll().

Makefile

@@ -12,6 +12,11 @@ endif
 
 override CFLAGS +=-Wall -std=c99
 
+HAVE_TERMIOS ?= 1
+ifeq ($(HAVE_TERMIOS),1)
+  override CFLAGS += -DHAVE_TERMIOS
+endif
+
 ifeq ($(DEBUG),1)
   override CFLAGS +=-ggdb -DDEBUG
 endif

driver-ti.c

@@ -17,7 +17,9 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <string.h>
-#include <unistd.h>
+#ifndef _WIN32
+# include <unistd.h>
+#endif
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ -338,8 +340,10 @@ static int start_driver(TermKey *tk, void *info)
   if(fstat(tk->fd, &statbuf) == -1)
     return 0;
 
+#ifndef _WIN32
   if(S_ISFIFO(statbuf.st_mode))
     return 1;
+#endif
 
   // Can't call putp or tputs because they suck and don't give us fd control
   len = strlen(start_string);
@@ -367,8 +371,10 @@ static int stop_driver(TermKey *tk, void *info)
   if(fstat(tk->fd, &statbuf) == -1)
     return 0;
 
+#ifndef _WIN32
   if(S_ISFIFO(statbuf.st_mode))
     return 1;
+#endif
 
   /* The terminfo database will contain keys in application cursor key mode.
    * We may need to enable that mode

termkey-internal.h

@@ -4,7 +4,14 @@
 #include "termkey.h"
 
 #include <stdint.h>
-#include <termios.h>
+#ifdef HAVE_TERMIOS
+# include <termios.h>
+#endif
+
+#ifdef _MSC_VER
+#include <BaseTsd.h>
+typedef SSIZE_T ssize_t;
+#endif
 
 struct TermKeyDriver
 {
@@ -41,8 +48,10 @@ struct TermKey {
   size_t hightide; /* Position beyond buffstart at which peekkey() should next start
                     * normally 0, but see also termkey_interpret_csi */
 
+#ifdef HAVE_TERMIOS
   struct termios restore_termios;
   char restore_termios_valid;
+#endif
 
   TermKey_Terminfo_Getstr_Hook *ti_getstr_hook;
   void *ti_getstr_hook_data;

termkey.c

@@ -3,14 +3,20 @@
 
 #include <ctype.h>
 #include <errno.h>
-#include <poll.h>
-#include <unistd.h>
+#ifndef _WIN32
+# include <poll.h>
+# include <unistd.h>
+# include <strings.h>
+#endif
 #include <string.h>
-#include <strings.h>
 
 #include <stdio.h>
 
-#define strcaseeq(a,b) (strcasecmp(a,b) == 0)
+#ifdef _MSC_VER
+# define strcaseeq(a,b) (_stricmp(a,b) == 0)
+#else
+# define strcaseeq(a,b) (strcasecmp(a,b) == 0)
+#endif
 
 void termkey_check_version(int major, int minor)
 {
@@ -282,7 +288,9 @@ static TermKey *termkey_alloc(void)
   tk->buffsize  = 256; /* bytes */
   tk->hightide  = 0;
 
+#ifdef HAVE_TERMIOS
   tk->restore_termios_valid = 0;
+#endif
 
   tk->ti_getstr_hook = NULL;
   tk->ti_getstr_hook_data = NULL;
@@ -483,6 +491,7 @@ int termkey_start(TermKey *tk)
   if(tk->is_started)
     return 1;
 
+#ifdef HAVE_TERMIOS
   if(tk->fd != -1 && !(tk->flags & TERMKEY_FLAG_NOTERMIOS)) {
     struct termios termios;
     if(tcgetattr(tk->fd, &termios) == 0) {
@@ -517,6 +526,7 @@ int termkey_start(TermKey *tk)
       tcsetattr(tk->fd, TCSANOW, &termios);
     }
   }
+#endif
 
   struct TermKeyDriverNode *p;
   for(p = tk->drivers; p; p = p->next)
@@ -542,8 +552,10 @@ int termkey_stop(TermKey *tk)
     if(p->driver->stop_driver)
       (*p->driver->stop_driver)(tk, p->info);
 
+#ifdef HAVE_TERMIOS
   if(tk->restore_termios_valid)
     tcsetattr(tk->fd, TCSANOW, &tk->restore_termios);
+#endif
 
   tk->is_started = 0;
 
@@ -1046,6 +1058,7 @@ TermKeyResult termkey_getkey_force(TermKey *tk, TermKeyKey *key)
   return ret;
 }
 
+#ifndef _WIN32
 TermKeyResult termkey_waitkey(TermKey *tk, TermKeyKey *key)
 {
   if(tk->fd == -1) {
@@ -1105,6 +1118,7 @@ TermKeyResult termkey_waitkey(TermKey *tk, TermKeyKey *key)
 
   /* UNREACHABLE */
 }
+#endif
 
 TermKeyResult termkey_advisereadable(TermKey *tk)
 {

termkey.h.in

@@ -197,7 +197,9 @@ void termkey_canonicalise(TermKey *tk, TermKeyKey *key);
 
 TermKeyResult termkey_getkey(TermKey *tk, TermKeyKey *key);
 TermKeyResult termkey_getkey_force(TermKey *tk, TermKeyKey *key);
+#ifndef _WIN32
 TermKeyResult termkey_waitkey(TermKey *tk, TermKeyKey *key);
+#endif
 
 TermKeyResult termkey_advisereadable(TermKey *tk);