1 /* 2 * reimplementation of Daniel Bernstein's buffer library. 3 * placed in the public domain by Uwe Ohse, uwe@ohse.de. 4 */ 5 #ifndef BUFFER_H 6 #define BUFFER_H 7 8 typedef int (*buffer_op) (int, char *,unsigned int); 9 typedef struct buffer { 10 char *buf; 11 unsigned int pos; 12 unsigned int len; 13 int fd; 14 buffer_op op; 15 } buffer; 16 17 #define BUFFER_INIT(op,fd,buf,len) { (buf), 0, (len), (fd), (op) } 18 #define BUFFER_INSIZE 4096 19 #define BUFFER_OUTSIZE 4096 20 21 extern void buffer_init(buffer *,buffer_op,int fd,char *,unsigned int); 22 extern int buffer_flush(buffer *); 23 extern int buffer_put(buffer *,const char *,unsigned int); 24 extern int buffer_putalign(buffer *,const char *,unsigned int); 25 extern int buffer_putflush(buffer *,const char *,unsigned int); 26 extern int buffer_puts(buffer *,const char *); 27 extern int buffer_putsalign(buffer *,const char *); 28 extern int buffer_putsflush(buffer *,const char *); 29 30 #define buffer_PUTC(s,c) \ 31 ( ((s)->len != (s)->pos) \ 32 ? ( (s)->buf[(s)->pos++] = (c), 0 ) \ 33 : buffer_put((s),&(c),1) \ 34 ) 35 36 extern int buffer_get(buffer *,char *,unsigned int); 37 extern int buffer_bget(buffer *,char *,unsigned int); 38 extern int buffer_feed(buffer *); 39 40 extern char *buffer_peek(buffer *); 41 extern void buffer_seek(buffer *,unsigned int); 42 43 #define buffer_PEEK(b) ( (b)->buf + (b)->len ) 44 #define buffer_SEEK(b,skip) ( ( (b)->pos -= (skip) ) , ( (b)->len += (skip) ) ) 45 46 #define buffer_GETC(b,ch) \ 47 ( ((b)->pos > 0) \ 48 ? ( *(ch) = (b)->buf[(b)->len], buffer_SEEK((b),1), 1 ) \ 49 : buffer_get((b),(ch),1) \ 50 ) 51 52 extern int buffer_copy(buffer *,buffer *); 53 54 extern buffer *buffer_0; 55 extern buffer *buffer_0small; 56 extern buffer *buffer_1; 57 extern buffer *buffer_1small; 58 extern buffer *buffer_2; 59 60 #endif 61