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annotate buffer.h @ 0:2cb46628feec

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from cdb-0.75 per http://cr.yp.to/cdb.html, retrieved 2025-01-03, contents appear to have been create on 2000-02-19
author Henry S. Thompson <ht@inf.ed.ac.uk>
date Wed, 29 Jan 2025 10:50:34 +0000
parents
children 3bfef1f22a97
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2cb46628feec from cdb-0.75 per http://cr.yp.to/cdb.html,
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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 typedef struct buffer {
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5 char *x;
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6 unsigned int p;
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7 unsigned int n;
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8 int fd;
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9 int (*op)();
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10 } buffer;
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11
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12 #define BUFFER_INIT(op,fd,buf,len) { (buf), 0, (len), (fd), (op) }
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13 #define BUFFER_INSIZE 8192
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14 #define BUFFER_OUTSIZE 8192
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15
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16 extern void buffer_init(buffer *,int (*)(),int,char *,unsigned int);
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17
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18 extern int buffer_flush(buffer *);
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19 extern int buffer_put(buffer *,char *,unsigned int);
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20 extern int buffer_putalign(buffer *,char *,unsigned int);
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21 extern int buffer_putflush(buffer *,char *,unsigned int);
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22 extern int buffer_puts(buffer *,char *);
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23 extern int buffer_putsalign(buffer *,char *);
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24 extern int buffer_putsflush(buffer *,char *);
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25
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26 #define buffer_PUTC(s,c) \
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27 ( ((s)->n != (s)->p) \
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28 ? ( (s)->x[(s)->p++] = (c), 0 ) \
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29 : buffer_put((s),&(c),1) \
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30 )
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31
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32 extern int buffer_get(buffer *,char *,unsigned int);
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33 extern int buffer_bget(buffer *,char *,unsigned int);
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34 extern int buffer_feed(buffer *);
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35
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36 extern char *buffer_peek(buffer *);
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37 extern void buffer_seek(buffer *,unsigned int);
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38
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39 #define buffer_PEEK(s) ( (s)->x + (s)->n )
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40 #define buffer_SEEK(s,len) ( ( (s)->p -= (len) ) , ( (s)->n += (len) ) )
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41
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42 #define buffer_GETC(s,c) \
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43 ( ((s)->p > 0) \
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44 ? ( *(c) = (s)->x[(s)->n], buffer_SEEK((s),1), 1 ) \
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45 : buffer_get((s),(c),1) \
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46 )
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47
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48 extern int buffer_copy(buffer *,buffer *);
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49
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50 extern buffer *buffer_0;
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51 extern buffer *buffer_0small;
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52 extern buffer *buffer_1;
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53 extern buffer *buffer_1small;
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54 extern buffer *buffer_2;
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55
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56 #endif