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1 | /* ==================================================================== |
2 | * Copyright (c) 1996,1997 The Apache Group. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in | |
13 | * the documentation and/or other materials provided with the | |
14 | * distribution. | |
15 | * | |
16 | * 3. All advertising materials mentioning features or use of this | |
17 | * software must display the following acknowledgment: | |
18 | * "This product includes software developed by the Apache Group | |
19 | * for use in the Apache HTTP server project (http://www.apache.org/)." | |
20 | * | |
21 | * 4. The names "Apache Server" and "Apache Group" must not be used to | |
22 | * endorse or promote products derived from this software without | |
23 | * prior written permission. | |
24 | * | |
25 | * 5. Redistributions of any form whatsoever must retain the following | |
26 | * acknowledgment: | |
27 | * "This product includes software developed by the Apache Group | |
28 | * for use in the Apache HTTP server project (http://www.apache.org/)." | |
29 | * | |
30 | * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY | |
31 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
33 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR | |
34 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
35 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
36 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
37 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
40 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
41 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
42 | * ==================================================================== | |
43 | * | |
44 | * This software consists of voluntary contributions made by many | |
45 | * individuals on behalf of the Apache Group and was originally based | |
46 | * on public domain software written at the National Center for | |
47 | * Supercomputing Applications, University of Illinois, Urbana-Champaign. | |
48 | * For more information on the Apache Group and the Apache HTTP server | |
49 | * project, please see <http://www.apache.org/>. | |
50 | * | |
51 | */ | |
52 | ||
53 | #include <stdarg.h> | |
54 | ||
55 | /* Reading is buffered */ | |
56 | #define B_RD (1) | |
57 | /* Writing is buffered */ | |
58 | #define B_WR (2) | |
59 | #define B_RDWR (3) | |
60 | /* At end of file, or closed stream; no further input allowed */ | |
61 | #define B_EOF (4) | |
62 | /* No further output possible */ | |
63 | #define B_EOUT (8) | |
64 | /* A read error has occurred */ | |
65 | #define B_RDERR (16) | |
66 | /* A write error has occurred */ | |
67 | #define B_WRERR (32) | |
68 | #ifdef B_ERROR /* in SVR4: sometimes defined in /usr/include/sys/buf.h */ | |
69 | #undef B_ERROR /* avoid "warning: `B_ERROR' redefined" */ | |
70 | #endif | |
71 | #define B_ERROR (48) | |
72 | /* Use chunked writing */ | |
73 | #define B_CHUNK (64) | |
74 | /* bflush() if a read would block */ | |
75 | #define B_SAFEREAD (128) | |
76 | ||
77 | typedef struct buff_struct BUFF; | |
78 | ||
79 | struct buff_struct { | |
80 | int flags; /* flags */ | |
81 | unsigned char *inptr; /* pointer to next location to read */ | |
82 | int incnt; /* number of bytes left to read from input buffer; | |
83 | * always 0 if had a read error */ | |
84 | int outchunk; /* location of chunk header when chunking */ | |
85 | int outcnt; /* number of byte put in output buffer */ | |
86 | unsigned char *inbase; | |
87 | unsigned char *outbase; | |
88 | int bufsiz; | |
89 | void (*error) (BUFF * fb, int op, void *data); | |
90 | void *error_data; | |
91 | long int bytes_sent; /* number of bytes actually written */ | |
92 | ||
93 | pool *pool; | |
94 | ||
95 | /* could also put pointers to the basic I/O routines here */ | |
96 | int fd; /* the file descriptor */ | |
97 | int fd_in; /* input file descriptor, if different */ | |
98 | }; | |
99 | ||
100 | /* Options to bset/getopt */ | |
101 | #define BO_BYTECT (1) | |
102 | ||
103 | /* Stream creation and modification */ | |
104 | extern BUFF *bcreate(pool * p, int flags); | |
105 | extern void bpushfd(BUFF * fb, int fd_in, int fd_out); | |
106 | extern int bsetopt(BUFF * fb, int optname, const void *optval); | |
107 | extern int bgetopt(BUFF * fb, int optname, void *optval); | |
108 | extern int bsetflag(BUFF * fb, int flag, int value); | |
109 | extern int bclose(BUFF * fb); | |
110 | ||
111 | #define bgetflag(fb, flag) ((fb)->flags & (flag)) | |
112 | ||
113 | /* Error handling */ | |
114 | extern void bonerror(BUFF * fb, void (*error) (BUFF *, int, void *), | |
115 | void *data); | |
116 | ||
117 | /* I/O */ | |
118 | extern int bread(BUFF * fb, void *buf, int nbyte); | |
119 | extern int bgets(char *s, int n, BUFF * fb); | |
120 | extern int blookc(char *buff, BUFF * fb); | |
121 | extern int bskiplf(BUFF * fb); | |
122 | extern int bwrite(BUFF * fb, const void *buf, int nbyte); | |
123 | extern int bflush(BUFF * fb); | |
124 | extern int bputs(const char *x, BUFF * fb); | |
125 | extern int bvputs(BUFF * fb, ...); | |
126 | extern int bprintf(BUFF * fb, const char *fmt, ...); | |
127 | extern int vbprintf(BUFF * fb, const char *fmt, va_list vlist); | |
128 | ||
129 | /* Internal routines */ | |
130 | extern int bflsbuf(int c, BUFF * fb); | |
131 | extern int bfilbuf(BUFF * fb); | |
132 | ||
133 | #define bgetc(fb) ( ((fb)->incnt == 0) ? bfilbuf(fb) : \ | |
134 | ((fb)->incnt--, *((fb)->inptr++)) ) | |
135 | ||
136 | #define bputc(c, fb) ((((fb)->flags & (B_EOUT|B_WRERR|B_WR)) != B_WR || \ | |
137 | (fb)->outcnt == (fb)->bufsiz) ? bflsbuf(c, (fb)) : \ | |
138 | ((fb)->outbase[(fb)->outcnt++] = (c), 0)) |