diff options
Diffstat (limited to 'libXfont/src/fontfile/bufio.c')
| -rw-r--r-- | libXfont/src/fontfile/bufio.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/libXfont/src/fontfile/bufio.c b/libXfont/src/fontfile/bufio.c new file mode 100644 index 000000000..a5746e3bd --- /dev/null +++ b/libXfont/src/fontfile/bufio.c @@ -0,0 +1,206 @@ +/* $Xorg: bufio.c,v 1.4 2001/02/09 02:04:03 xorgcvs Exp $ */ + +/* + +Copyright 1991, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +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 OPEN GROUP 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 Open Group 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 Open Group. + +*/ +/* $XFree86: xc/lib/font/fontfile/bufio.c,v 3.9 2001/12/14 19:56:50 dawes Exp $ */ + +/* + * Author: Keith Packard, MIT X Consortium + */ + + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <X11/Xos.h> +#include <X11/fonts/fontmisc.h> +#include <X11/fonts/bufio.h> +#include <errno.h> + +BufFilePtr +BufFileCreate (char *private, + int (*input)(BufFilePtr), + int (*output)(int, BufFilePtr), + int (*skip)(BufFilePtr, int), + int (*close)(BufFilePtr, int)) +{ + BufFilePtr f; + + f = (BufFilePtr) xalloc (sizeof *f); + if (!f) + return 0; + f->private = private; + f->bufp = f->buffer; + f->left = 0; + f->input = input; + f->output = output; + f->skip = skip; + f->eof = 0; + f->close = close; + return f; +} + +#define FileDes(f) ((int)(long) (f)->private) + +static int +BufFileRawFill (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 (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 (BufFilePtr f, int doClose) +{ + if (doClose) + close (FileDes (f)); + return 1; +} + +BufFilePtr +BufFileOpenRead (int fd) +{ +#if defined(__UNIXOS2__) || defined (WIN32) + /* hv: I'd bet WIN32 has the same effect here */ + setmode(fd,O_BINARY); +#endif + return BufFileCreate ((char *)(long) fd, BufFileRawFill, 0, BufFileRawSkip, BufFileRawClose); +} + +static int +BufFileRawFlush (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; +} + +static int +BufFileFlush (BufFilePtr f, int doClose) +{ + if (f->bufp != f->buffer) + return (*f->output) (BUFFILEEOF, f); + return 0; +} + +BufFilePtr +BufFileOpenWrite (int fd) +{ + BufFilePtr f; + +#if defined(__UNIXOS2__) || defined(WIN32) + /* hv: I'd bet WIN32 has the same effect here */ + setmode(fd,O_BINARY); +#endif + f = BufFileCreate ((char *)(long) fd, 0, BufFileRawFlush, 0, BufFileFlush); + f->bufp = f->buffer; + f->left = BUFFILESIZE; + return f; +} + +int +BufFileRead (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; +} + +int +BufFileWrite (BufFilePtr f, char *b, int n) +{ + int cnt; + cnt = n; + while (cnt--) { + if (BufFilePut (*b++, f) == BUFFILEEOF) + return BUFFILEEOF; + } + return n; +} + +int +BufFileClose (BufFilePtr f, int doClose) +{ + int ret; + ret = (*f->close) (f, doClose); + xfree (f); + return ret; +} |