add iob_free and man page for iob_reset.

check in some windoze compat crap (still does not compile through for
windoze)

buffer/buffer_close.c

@@ -1,13 +1,22 @@
 #include <buffer.h>
 #include <stdlib.h>
 #include <unistd.h>
+#ifdef __MINGW32__
+#include <windows.h>
+#else
 #include <sys/mman.h>
+#endif
 
 void buffer_close(buffer* b) {
   if (b->fd != -1) close(b->fd);
   switch (b->todo) {
   case FREE: free(b->x); break;
-  case MUNMAP: munmap(b->x,b->a); break;
+  case MUNMAP:
+#ifdef __MINGW32__
+    UnmapViewOfFile(b->x);
+#else
+    munmap(b->x,b->a); break;
+#endif
   default: ;
   }
 }

buffer/errmsg_cvt.c

@@ -1,6 +1,15 @@
 #include <stdarg.h>
 #include <sys/types.h>
+#ifdef __MINGW32__
+#include "windows.h"
+
+struct iovec {
+  LPCVOID iov_base;
+  DWORD iov_len;
+};
+#else
 #include <sys/uio.h>
+#endif
 #include "errmsg.h"
 #include "str.h"
 

buffer/errmsg_info.c

@@ -1,6 +1,16 @@
 #include <stdarg.h>
 #include <sys/types.h>
+#ifdef __MINGW32__
+#include "windows.h"
+#include <unistd.h>
+
+struct iovec {
+  LPCVOID iov_base;
+  DWORD iov_len;
+};
+#else
 #include <sys/uio.h>
+#endif
 #include "errmsg.h"
 #include "str.h"
 
@@ -10,6 +20,15 @@ void errmsg_info(const char* message, ...) {
   struct iovec x[23];
   va_list a;
   va_start(a,message);
+#ifdef __MINGW32__
+  {
+    int i,j;
+    j=errmsg_cvt(x,message,a);
+    for (i=0; i<j; ++i)
+      write(1,x[i].iov_base,x[i].iov_len);
+  }
+#else
   writev(1,x,errmsg_cvt(x,message,a));
+#endif
   va_end(a);
 }

buffer/errmsg_infosys.c

@@ -1,12 +1,10 @@
 #include <stdarg.h>
 #include <sys/types.h>
-#include <sys/uio.h>
 #include "errmsg.h"
 #include "str.h"
 #include <string.h>
 #include <errno.h>
 
-extern int errmsg_cvt(struct iovec* x,const char* message, va_list a);
 extern void errmsg_writesys(int fd,const char* message,va_list list);
 
 void errmsg_infosys(const char* message, ...) {

buffer/errmsg_warn.c

@@ -1,6 +1,16 @@
 #include <stdarg.h>
 #include <sys/types.h>
+#ifdef __MINGW32__
+#include "windows.h"
+#include <unistd.h>
+
+struct iovec {
+  LPCVOID iov_base;
+  DWORD iov_len;
+};
+#else
 #include <sys/uio.h>
+#endif
 #include "errmsg.h"
 #include "str.h"
 
@@ -10,6 +20,15 @@ void errmsg_warn(const char* message, ...) {
   struct iovec x[23];
   va_list a;
   va_start(a,message);
+#ifdef __MINGW32__
+  {
+    int i,j;
+    j=errmsg_cvt(x,message,a);
+    for (i=0; i<j; ++i)
+      write(2,x[i].iov_base,x[i].iov_len);
+  }
+#else
   writev(2,x,errmsg_cvt(x,message,a));
+#endif
   va_end(a);
 }

buffer/errmsg_warnsys.c

@@ -1,12 +1,10 @@
 #include <stdarg.h>
 #include <sys/types.h>
-#include <sys/uio.h>
 #include "errmsg.h"
 #include "str.h"
 #include <string.h>
 #include <errno.h>
 
-extern int errmsg_cvt(struct iovec* x,const char* message, va_list a);
 extern void errmsg_writesys(int fd,const char* message,va_list list);
 
 void errmsg_warnsys(const char* message, ...) {

buffer/errmsg_writesys.c

@@ -1,6 +1,16 @@
 #include <stdarg.h>
 #include <sys/types.h>
+#ifdef __MINGW32__
+#include "windows.h"
+#include <unistd.h>
+
+struct iovec {
+  LPCVOID iov_base;
+  DWORD iov_len;
+};
+#else
 #include <sys/uio.h>
+#endif
 #include "errmsg.h"
 #include "str.h"
 #include <string.h>
@@ -22,5 +32,13 @@ void errmsg_writesys(int fd,const char* message,va_list list) {
   x[i+1].iov_base="\n";
   x[i+1].iov_len=1;
 
+#ifdef __MINGW32__
+  {
+    int j;
+    for (j=0; j<i+2; ++j)
+      write(2,x[j].iov_base,x[j].iov_len);
+  }
+#else
   writev(2,x,i+2);
+#endif
 }