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annotate buffer.h @ 17:d9c11148df3b default tip

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author Henry S. Thompson <ht@inf.ed.ac.uk>
date Thu, 28 Aug 2025 11:02:58 +0100
parents b7bbc84fe17f
children
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1 #ifndef BUFFER_H
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2 #define BUFFER_H
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3
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4 #include <unistd.h>
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5
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6 typedef struct buffer {
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7 char *x;
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8 unsigned int p;
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9 unsigned int n;
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10 int fd;
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11 ssize_t (*op)();
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12 } buffer;
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13
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14 #define BUFFER_INIT(op,fd,buf,len) { (buf), 0, (len), (fd), (op) }
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15 #define BUFFER_INSIZE 65536
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16 #define BUFFER_OUTSIZE 65536
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17
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18 extern void buffer_init(buffer *,ssize_t (*)(),int,char *,unsigned int);
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19
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20 extern int buffer_flush(buffer *);
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21 extern int buffer_put(buffer *,char *,unsigned int);
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22 extern int buffer_putalign(buffer *,char *,unsigned int);
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23 extern int buffer_putflush(buffer *,char *,unsigned int);
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24 extern int buffer_puts(buffer *,char *);
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25 extern int buffer_putsalign(buffer *,char *);
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26 extern int buffer_putsflush(buffer *,char *);
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27
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28 #define buffer_PUTC(s,c) \
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29 ( ((s)->n != (s)->p) \
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30 ? ( (s)->x[(s)->p++] = (c), 0 ) \
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31 : buffer_put((s),&(c),1) \
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32 )
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33
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34 extern int buffer_get(buffer *,char *,unsigned int);
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35 extern int buffer_bget(buffer *,char *,unsigned int);
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36 extern int buffer_feed(buffer *);
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37
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38 extern char *buffer_peek(buffer *);
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39 extern void buffer_seek(buffer *,unsigned int);
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40
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41 #define buffer_PEEK(s) ( (s)->x + (s)->n )
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42 #define buffer_SEEK(s,len) ( ( (s)->p -= (len) ) , ( (s)->n += (len) ) )
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43
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44 #define buffer_GETC(s,c) \
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45 ( ((s)->p > 0) \
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46 ? ( *(c) = (s)->x[(s)->n], buffer_SEEK((s),1), 1 ) \
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47 : buffer_get((s),(c),1) \
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48 )
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49
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50 extern int buffer_copy(buffer *,buffer *);
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51
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52 extern buffer *buffer_0;
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53 extern buffer *buffer_0small;
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54 extern buffer *buffer_1;
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55 extern buffer *buffer_1small;
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56 extern buffer *buffer_2;
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57
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58 #endif