buffer.h

   1 #ifndef BUFFER_H
   2 #define BUFFER_H
   3
   4 typedef struct buffer {
   5   char *x;
   6   unsigned int p;
   7   unsigned int n;
   8   int fd;
   9   int (*op)();
  10 } buffer;
  11
  12 #define BUFFER_INIT(op,fd,buf,len) { (buf), 0, (len), (fd), (op) }
  13 #define BUFFER_INSIZE 8192
  14 #define BUFFER_OUTSIZE 8192
  15
  16 extern void buffer_init(buffer *,int (*)(),int,char *,unsigned int);
  17
  18 extern int buffer_flush(buffer *);
  19 extern int buffer_put(buffer *,const char *,unsigned int);
  20 extern int buffer_putalign(buffer *,const char *,unsigned int);
  21 extern int buffer_putflush(buffer *,const char *,unsigned int);
  22 extern int buffer_puts(buffer *,const char *);
  23 extern int buffer_putsalign(buffer *,const char *);
  24 extern int buffer_putsflush(buffer *,const char *);
  25
  26 #define buffer_PUTC(s,c) \
  27   ( ((s)->n != (s)->p) \
  28     ? ( (s)->x[(s)->p++] = (c), 0 ) \
  29     : buffer_put((s),&(c),1) \
  30   )
  31
  32 extern int buffer_get(buffer *,char *,unsigned int);
  33 extern int buffer_bget(buffer *,char *,unsigned int);
  34 extern int buffer_feed(buffer *);
  35
  36 extern char *buffer_peek(buffer *);
  37 extern void buffer_seek(buffer *,unsigned int);
  38
  39 #define buffer_PEEK(s) ( (s)->x + (s)->n )
  40 #define buffer_SEEK(s,len) ( ( (s)->p -= (len) ) , ( (s)->n += (len) ) )
  41
  42 #define buffer_GETC(s,c) \
  43   ( ((s)->p > 0) \
  44     ? ( *(c) = (s)->x[(s)->n], buffer_SEEK((s),1), 1 ) \
  45     : buffer_get((s),(c),1) \
  46   )
  47
  48 extern int buffer_copy(buffer *,buffer *);
  49
  50 extern int buffer_unixread(int,char *,unsigned int);
  51 extern int buffer_unixwrite(int,const char *,unsigned int);
  52
  53 extern buffer *buffer_0;
  54 extern buffer *buffer_0small;
  55 extern buffer *buffer_1;
  56 extern buffer *buffer_1small;
  57 extern buffer *buffer_2;
  58
  59 #endif