* win32/win32.{h,c} (rb_w32_{f,fd,fs}open): workaround for bcc32's

  {f,fd,fs}open bug. set errno EMFILE and EBADF. [ruby-dev:23963]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6696 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 64 insertions, 0 deletions

diff --git a/win32/win32.c b/win32/win32.c
index ac97b201e9..df16c8dbc9 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -3277,3 +3277,55 @@ rb_w32_snprintf(char *buf, size_t size, const char *format, ...)
     va_end(va);
     return ret;
 }
+
+//
+// Fix bcc32's stdio bug
+//
+
+#ifdef __BORLANDC__
+static int
+too_many_files()
+{
+    FILE *f;
+    for (f = _streams; f < _streams + _nfile; f++) {
+	if (f->fd < 0) return 0;
+    }
+    return 1;
+}
+
+#undef fopen
+FILE *
+rb_w32_fopen(const char *path, const char *mode)
+{
+    FILE *f = (errno = 0, fopen(path, mode));
+    if (f == NULL && errno == 0) {
+	if (too_many_files())
+	    errno = EMFILE;
+    }
+    return f;
+}
+
+FILE *
+rb_w32_fdopen(int handle, char *type)
+{
+    FILE *f = (errno = 0, _fdopen(handle, type));
+    if (f == NULL && errno == 0) {
+	if (handle < 0)
+	    errno = EBADF;
+	else if (too_many_files())
+	    errno = EMFILE;
+    }
+    return f;
+}
+
+FILE *
+rb_w32_fsopen(const char *path, const char *mode, int shflags)
+{
+    FILE *f = (errno = 0, _fsopen(path, mode, shflags));
+    if (f == NULL && errno == 0) {
+	if (too_many_files())
+	    errno = EMFILE;
+    }
+    return f;
+}
+#endif
diff --git a/win32/win32.h b/win32/win32.h
index 92dd59c169..60f9e3ddbd 100644
--- a/win32/win32.h
+++ b/win32/win32.h
@@ -113,6 +113,12 @@ extern "C++" {
 #define write(h, b, l)		_write(h, b, l)
 #define _open			_sopen
 #define sopen			_sopen
+#undef fopen
+#define fopen(p, m)		rb_w32_fopen(p, m)
+#undef fdopen
+#define fdopen(h, m)		rb_w32_fdopen(h, m)
+#undef fsopen
+#define fsopen(p, m, sh)	rb_w32_fsopen(p, m, sh)
 #endif
 #define fsync(h)		_commit(h)
 #undef stat
@@ -178,6 +184,12 @@ extern int do_aspawn(int, char *, char **);
 extern int kill(int, int);
 extern pid_t rb_w32_getpid(void);
 
+#ifdef __BORLANDC__
+extern FILE *rb_w32_fopen(const char *, const char *);
+extern FILE *rb_w32_fdopen(int, char *);
+extern FILE *rb_w32_fsopen(const char *, const char *, int);
+#endif
+
 #include <float.h>
 #if !defined __MINGW32__ || defined __NO_ISOCEXT
 #ifndef isnan