Import X server from vnc-3.3.7.

[rdpsrv] / Xserver / lib / font / fontfile / bufio.c

diff --git a/Xserver/lib/font/fontfile/bufio.c b/Xserver/lib/font/fontfile/bufio.c
new file mode 100644 (file)
index 0000000..736b76f
--- /dev/null
+++ b/Xserver/lib/font/fontfile/bufio.c
@@ -0,0 +1,224 @@
+/* $XConsortium: bufio.c,v 1.8 94/04/17 20:17:00 gildea Exp $ */
+/* $XFree86: xc/lib/font/fontfile/bufio.c,v 3.0 1994/12/17 09:41:39 dawes Exp $ */
+
+/*
+
+Copyright (c) 1991  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from the X Consortium.
+
+*/
+
+/*
+ * Author:  Keith Packard, MIT X Consortium
+ */
+
+
+#include <X11/Xos.h>
+#include <fontmisc.h>
+#include <bufio.h>
+#include <errno.h>
+#ifdef X_NOT_STDC_ENV
+extern int errno;
+#endif
+
+BufFilePtr
+BufFileCreate (private, io, skip, close)
+    char    *private;
+    int            (*io)();
+    int            (*skip)();
+    int            (*close)();
+{
+    BufFilePtr f;
+
+    f = (BufFilePtr) xalloc (sizeof *f);
+    if (!f)
+       return 0;
+    f->private = private;
+    f->bufp = f->buffer;
+    f->left = 0;
+    f->io = io;
+    f->skip = skip;
+    f->close = close;
+    return f;
+}
+
+#define FileDes(f)  ((int) (f)->private)
+
+static int
+BufFileRawFill (f)
+    BufFilePtr f;
+{
+    int        left;
+
+    left = read (FileDes(f), (char *)f->buffer, BUFFILESIZE);
+    if (left <= 0) {
+       f->left = 0;
+       return BUFFILEEOF;
+    }
+    f->left = left - 1;
+    f->bufp = f->buffer + 1;
+    return f->buffer[0];
+}
+
+static int
+BufFileRawSkip (f, count)
+    BufFilePtr f;
+    int                count;
+{
+    int            curoff;
+    int            fileoff;
+    int            todo;
+
+    curoff = f->bufp - f->buffer;
+    fileoff = curoff + f->left;
+    if (curoff + count <= fileoff) {
+       f->bufp += count;
+       f->left -= count;
+    } else {
+       todo = count - (fileoff - curoff);
+       if (lseek (FileDes(f), todo, 1) == -1) {
+           if (errno != ESPIPE)
+               return BUFFILEEOF;
+           while (todo) {
+               curoff = BUFFILESIZE;
+               if (curoff > todo)
+                   curoff = todo;
+               fileoff = read (FileDes(f), (char *)f->buffer, curoff);
+               if (fileoff <= 0)
+                   return BUFFILEEOF;
+               todo -= fileoff;
+           }
+       }
+       f->left = 0;
+    }
+    return count;
+}
+
+static int
+BufFileRawClose (f, doClose)
+    BufFilePtr f;
+{
+    if (doClose)
+       close (FileDes (f));
+    return 1;
+}
+
+BufFilePtr
+BufFileOpenRead (fd)
+    int        fd;
+{
+#ifdef __EMX__
+    /* hv: I'd bet WIN32 has the same effect here */
+    setmode(fd,O_BINARY);
+#endif
+    return BufFileCreate ((char *) fd, BufFileRawFill, BufFileRawSkip, BufFileRawClose);
+}
+
+static
+BufFileRawFlush (c, f)
+    int                c;
+    BufFilePtr f;
+{
+    int        cnt;
+
+    if (c != BUFFILEEOF)
+       *f->bufp++ = c;
+    cnt = f->bufp - f->buffer;
+    f->bufp = f->buffer;
+    f->left = BUFFILESIZE;
+    if (write (FileDes(f), (char *)f->buffer, cnt) != cnt)
+       return BUFFILEEOF;
+    return c;
+}
+
+BufFilePtr
+BufFileOpenWrite (fd)
+    int        fd;
+{
+    BufFilePtr f;
+
+#ifdef __EMX__
+    /* hv: I'd bet WIN32 has the same effect here */
+    setmode(fd,O_BINARY);
+#endif
+    f = BufFileCreate ((char *) fd, BufFileRawFlush, 0, BufFileFlush);
+    f->bufp = f->buffer;
+    f->left = BUFFILESIZE;
+    return f;
+}
+
+BufFileRead (f, b, n)
+    BufFilePtr f;
+    char       *b;
+    int                n;
+{
+    int            c, cnt;
+    cnt = n;
+    while (cnt--) {
+       c = BufFileGet (f);
+       if (c == BUFFILEEOF)
+           break;
+       *b++ = c;
+    }
+    return n - cnt - 1;
+}
+
+BufFileWrite (f, b, n)
+    BufFilePtr f;
+    char       *b;
+    int                n;
+{
+    int            cnt;
+    cnt = n;
+    while (cnt--) {
+       if (BufFilePut (*b++, f) == BUFFILEEOF)
+           return BUFFILEEOF;
+    }
+    return n;
+}
+
+int
+BufFileFlush (f)
+    BufFilePtr f;
+{
+    if (f->bufp != f->buffer)
+       (*f->io) (BUFFILEEOF, f);
+}
+
+int
+BufFileClose (f, doClose)
+    BufFilePtr f;
+{
+    (void) (*f->close) (f, doClose);
+    xfree (f);
+}
+
+int
+BufFileFree (f)
+    BufFilePtr f;
+{
+    xfree (f);
+}