IABSD.fr/xenocara/app/bdftopcf/bufio.c

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• Author : matthieu
  Date : 2022-11-06 12:25:44
  Hash : ee53c51e
  Message : Update bdftopcf to version 1.1.1

• app/bdftopcf/bufio.c

• /*
  
  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.
  
  */
  
  /*
   * Author:  Keith Packard, MIT X Consortium
   */
  
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include <X11/Xos.h>
  #include "fontmisc.h"
  #include "bufio.h"
  #include <errno.h>
  
  static BufFilePtr
  BufFileCreate(char *private,
                int (*input)(BufFilePtr),
                int (*output)(int, BufFilePtr),
                int (*skip)(BufFilePtr, int),
                int (*close)(BufFilePtr, int))
  {
      BufFilePtr f;
  
      f = malloc(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 = f->bufp - f->buffer;
      int fileoff = curoff + f->left;
  
      if (curoff + count <= fileoff) {
          f->bufp += count;
          f->left -= count;
      }
      else {
          int 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 (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(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);
      if (f != NULL) {
          f->bufp = f->buffer;
          f->left = BUFFILESIZE;
      }
      return f;
  }
  
  int
  BufFileWrite(BufFilePtr f, char *b, int n)
  {
      int cnt = n;
  
      while (cnt--) {
          if (BufFilePut(*b++, f) == BUFFILEEOF)
              return BUFFILEEOF;
      }
      return n;
  }
  
  int
  BufFileClose(BufFilePtr f, int doClose)
  {
      int ret = (*f->close) (f, doClose);
  
      free(f);
      return ret;
  }