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Diffstat (limited to 'contrib/sendmail/include/sm/io.h')
| -rw-r--r-- | contrib/sendmail/include/sm/io.h | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/contrib/sendmail/include/sm/io.h b/contrib/sendmail/include/sm/io.h new file mode 100644 index 0000000..b95ede5 --- /dev/null +++ b/contrib/sendmail/include/sm/io.h @@ -0,0 +1,382 @@ +/* + * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. + * All rights reserved. + * Copyright (c) 1990 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + * + * $Id: io.h,v 1.19 2001/07/10 21:56:46 gshapiro Exp $ + */ + +/*- + * @(#)stdio.h 5.17 (Berkeley) 6/3/91 + */ + +#ifndef SM_IO_H +#define SM_IO_H + +#include <stdio.h> +#include <sm/gen.h> +#include <sm/varargs.h> + +/* mode for sm io (exposed) */ +#define SM_IO_RDWR 1 /* read-write */ +#define SM_IO_RDONLY 2 /* read-only */ +#define SM_IO_WRONLY 3 /* write-only */ +#define SM_IO_APPEND 4 /* write-only from eof */ +#define SM_IO_APPENDRW 5 /* read-write from eof */ +#define SM_IO_RDWRTR 6 /* read-write with truncation indicated */ + +/* for sm_io_fseek, et al api's (exposed) */ +#define SM_IO_SEEK_SET 0 +#define SM_IO_SEEK_CUR 1 +#define SM_IO_SEEK_END 2 + +/* flags for info what's with different types (exposed) */ +#define SM_IO_WHAT_MODE 1 +#define SM_IO_WHAT_VECTORS 2 +#define SM_IO_WHAT_FD 3 +#define SM_IO_WHAT_TYPE 4 +#define SM_IO_WHAT_ISTYPE 5 +#define SM_IO_IS_READABLE 6 +#define SM_IO_WHAT_TIMEOUT 7 + +/* info flags (exposed) */ +#define SM_IO_FTYPE_CREATE 1 +#define SM_IO_FTYPE_MODIFY 2 +#define SM_IO_FTYPE_DELETE 3 + +#define SM_IO_SL_PRIO 1 + +#define SM_IO_OPEN_MAX 20 + +/* for internal buffers */ +struct smbuf +{ + unsigned char *smb_base; + int smb_size; +}; + +/* +** sm I/O state variables (internal only). +** +** The following always hold: +** +** if (flags&(SMLBF|SMWR)) == (SMLBF|SMWR), +** lbfsize is -bf.size, else lbfsize is 0 +** if flags&SMRD, w is 0 +** if flags&SMWR, r is 0 +** +** This ensures that the getc and putc macros (or inline functions) never +** try to write or read from a file that is in `read' or `write' mode. +** (Moreover, they can, and do, automatically switch from read mode to +** write mode, and back, on "r+" and "w+" files.) +** +** lbfsize is used only to make the inline line-buffered output stream +** code as compact as possible. +** +** ub, up, and ur are used when ungetc() pushes back more characters +** than fit in the current bf, or when ungetc() pushes back a character +** that does not match the previous one in bf. When this happens, +** ub.base becomes non-nil (i.e., a stream has ungetc() data iff +** ub.base!=NULL) and up and ur save the current values of p and r. +*/ + +typedef struct sm_file SM_FILE_T; + +struct sm_file +{ + const char *sm_magic; /* This SM_FILE_T is free when NULL */ + unsigned char *f_p; /* current position in (some) buffer */ + int f_r; /* read space left for getc() */ + int f_w; /* write space left for putc() */ + long f_flags; /* flags, below */ + short f_file; /* fileno, if Unix fd, else -1 */ + struct smbuf f_bf; /* the buffer (>= 1 byte, if !NULL) */ + int f_lbfsize; /* 0 or -bf.size, for inline putc */ + + /* These can be used for any purpose by a file type implementation: */ + void *f_cookie; + int f_ival; + + /* operations */ + int (*f_close) __P((SM_FILE_T *)); + ssize_t (*f_read) __P((SM_FILE_T *, char *, size_t)); + off_t (*f_seek) __P((SM_FILE_T *, off_t, int)); + ssize_t (*f_write) __P((SM_FILE_T *, const char *, size_t)); + int (*f_open) __P((SM_FILE_T *, const void *, int, + const void *)); + int (*f_setinfo) __P((SM_FILE_T *, int , void *)); + int (*f_getinfo) __P((SM_FILE_T *, int , void *)); + int f_timeout; + int f_timeoutstate; /* either blocking or non-blocking */ + char *f_type; /* for by-type lookups */ + void *f_self; /* self for reference */ + struct sm_file *f_flushfp; /* flush this before reading parent */ + struct sm_file *f_modefp; /* sync mode with this fp */ + + /* separate buffer for long sequences of ungetc() */ + struct smbuf f_ub; /* ungetc buffer */ + unsigned char *f_up; /* saved f_p when f_p is doing ungetc */ + int f_ur; /* saved f_r when f_r is counting ungetc */ + + /* tricks to meet minimum requirements even when malloc() fails */ + unsigned char f_ubuf[3]; /* guarantee an ungetc() buffer */ + unsigned char f_nbuf[1]; /* guarantee a getc() buffer */ + + /* separate buffer for fgetln() when line crosses buffer boundary */ + struct smbuf f_lb; /* buffer for fgetln() */ + + /* Unix stdio files get aligned to block boundaries on fseek() */ + int f_blksize; /* stat.st_blksize (may be != bf.size) */ + off_t f_lseekoff; /* current lseek offset */ + int f_dup_cnt; /* count file dup'd */ +}; + +__BEGIN_DECLS +extern SM_FILE_T SmIoF[]; +extern const char SmFileMagic[]; +extern SM_FILE_T SmFtStdio_def; +extern SM_FILE_T SmFtStdiofd_def; +extern SM_FILE_T SmFtString_def; +extern SM_FILE_T SmFtSyslog_def; +extern SM_FILE_T SmFtRealStdio_def; + +#define SMIOIN_FILENO 0 +#define SMIOOUT_FILENO 1 +#define SMIOERR_FILENO 2 +#define SMIOSTDIN_FILENO 3 +#define SMIOSTDOUT_FILENO 4 +#define SMIOSTDERR_FILENO 5 + +/* Common predefined and already (usually) open files (exposed) */ +#define smioin (&SmIoF[SMIOIN_FILENO]) +#define smioout (&SmIoF[SMIOOUT_FILENO]) +#define smioerr (&SmIoF[SMIOERR_FILENO]) +#define smiostdin (&SmIoF[SMIOSTDIN_FILENO]) +#define smiostdout (&SmIoF[SMIOSTDOUT_FILENO]) +#define smiostderr (&SmIoF[SMIOSTDERR_FILENO]) + +#define SmFtStdio (&SmFtStdio_def) +#define SmFtStdiofd (&SmFtStdiofd_def) +#define SmFtString (&SmFtString_def) +#define SmFtSyslog (&SmFtSyslog_def) +#define SmFtRealStdio (&SmFtRealStdio_def) + +#ifdef __STDC__ +# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \ + (f) = {SmFileMagic, (unsigned char *) 0, 0, 0, 0L, -1, {0}, 0, (void *) 0,\ + 0, (close), (read), (seek), (write), (open), (set), (get), (timeout),\ + 0, (name)} +# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout) + +#else /* __STDC__ */ +# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) (f) +# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \ + (f).sm_magic = SmFileMagic; \ + (f).f_p = (unsigned char *) 0; \ + (f).f_r = 0; \ + (f).f_w = 0; \ + (f).f_flags = 0L; \ + (f).f_file = 0; \ + (f).f_bf.smb_base = (unsigned char *) 0; \ + (f).f_bf.smb_size = 0; \ + (f).f_lbfsize = 0; \ + (f).f_cookie = (void *) 0; \ + (f).f_ival = 0; \ + (f).f_close = (close); \ + (f).f_read = (read); \ + (f).f_seek = (seek); \ + (f).f_write = (write); \ + (f).f_open = (open); \ + (f).f_setinfo = (set); \ + (f).f_getinfo = (get); \ + (f).f_timeout = (timeout); \ + (f).f_timeoutstate = 0; \ + (f).f_type = (name); + +#endif /* __STDC__ */ + +__END_DECLS + +/* Internal flags */ +#define SMFBF 0x000001 /* XXXX fully buffered */ +#define SMLBF 0x000002 /* line buffered */ +#define SMNBF 0x000004 /* unbuffered */ +#define SMNOW 0x000008 /* Flush each write; take read now */ +#define SMRD 0x000010 /* OK to read */ +#define SMWR 0x000020 /* OK to write */ + /* RD and WR are never simultaneously asserted */ +#define SMRW 0x000040 /* open for reading & writing */ +#define SMFEOF 0x000080 /* found EOF */ +#define SMERR 0x000100 /* found error */ +#define SMMBF 0x000200 /* buf is from malloc */ +#define SMAPP 0x000400 /* fdopen()ed in append mode */ +#define SMSTR 0x000800 /* this is an snprintf string */ +#define SMOPT 0x001000 /* do fseek() optimisation */ +#define SMNPT 0x002000 /* do not do fseek() optimisation */ +#define SMOFF 0x004000 /* set iff offset is in fact correct */ +#define SMALC 0x010000 /* allocate string space dynamically */ + +#define SMACCESSMASK 0x0070 +#define SMMODEMASK 0x011C + +/* defines for timeout constants */ +#define SM_TIME_IMMEDIATE (0) +#define SM_TIME_FOREVER (-1) +#define SM_TIME_DEFAULT (-2) + +/* timeout state for blocking */ +#define SM_TIME_BLOCK (0) /* XXX just bool? */ +#define SM_TIME_NONBLOCK (1) + +/* Exposed buffering type flags */ +#define SM_IO_FBF 0 /* setvbuf should set fully buffered */ +#define SM_IO_LBF 1 /* setvbuf should set line buffered */ +#define SM_IO_NBF 2 /* setvbuf should set unbuffered */ + +/* setvbuf buffered, but through at lower file type layers */ +#define SM_IO_NOW 3 + +/* +** size of buffer used by setbuf. +** If underlying filesystem blocksize is discoverable that is used instead +*/ + +#define SM_IO_BUFSIZ 4096 + +#define SM_IO_EOF (-1) + +/* Functions defined in ANSI C standard. */ +__BEGIN_DECLS +SM_FILE_T *sm_io_autoflush __P((SM_FILE_T *, SM_FILE_T *)); +void sm_io_automode __P((SM_FILE_T *, SM_FILE_T *)); +void sm_io_clearerr __P((SM_FILE_T *)); +int sm_io_close __P((SM_FILE_T *, int SM_NONVOLATILE)); +SM_FILE_T *sm_io_dup __P((SM_FILE_T *)); +int sm_io_eof __P((SM_FILE_T *)); +int sm_io_error __P((SM_FILE_T *)); +char *sm_io_fgets __P((SM_FILE_T *, int, char *, int)); +int sm_io_flush __P((SM_FILE_T *, int SM_NONVOLATILE)); + +int PRINTFLIKE(3, 4) +sm_io_fprintf __P((SM_FILE_T *, int, const char *, ...)); + +int sm_io_fputs __P((SM_FILE_T *, int, const char *)); + +int SCANFLIKE(3, 4) +sm_io_fscanf __P((SM_FILE_T *, int, const char *, ...)); + +int sm_io_getc __P((SM_FILE_T *, int)); +int sm_io_getinfo __P((SM_FILE_T *, int, void *)); +SM_FILE_T *sm_io_open __P((const SM_FILE_T *, int SM_NONVOLATILE, const void *, + int, const void *)); +int sm_io_purge __P((SM_FILE_T *)); +int sm_io_putc __P((SM_FILE_T *, int, int)); +size_t sm_io_read __P((SM_FILE_T *, int, void *, size_t)); +SM_FILE_T *sm_io_reopen __P((const SM_FILE_T *, int SM_NONVOLATILE, + const void *, int, const void *, SM_FILE_T *)); +void sm_io_rewind __P((SM_FILE_T *, int)); +int sm_io_seek __P((SM_FILE_T *, int SM_NONVOLATILE, long SM_NONVOLATILE, + int SM_NONVOLATILE)); +int sm_io_setinfo __P((SM_FILE_T *, int, void *)); +int sm_io_setvbuf __P((SM_FILE_T *, int, char *, int, size_t)); + +int SCANFLIKE(2, 3) +sm_io_sscanf __P((const char *, char const *, ...)); + +long sm_io_tell __P((SM_FILE_T *, int SM_NONVOLATILE)); +int sm_io_ungetc __P((SM_FILE_T *, int, int)); +int sm_io_vfprintf __P((SM_FILE_T *, int, const char *, va_list)); +size_t sm_io_write __P((SM_FILE_T *, int, const void *, size_t)); + +void sm_strio_init __P((SM_FILE_T *, char *, size_t)); + +extern SM_FILE_T * +sm_io_fopen __P(( + char *_pathname, + int _flags, + ...)); + +extern SM_FILE_T * +sm_io_stdioopen __P(( + FILE *_stream, + char *_mode)); + +extern int +sm_vasprintf __P(( + char **_str, + const char *_fmt, + va_list _ap)); + +extern int +sm_vsnprintf __P(( + char *, + size_t, + const char *, + va_list)); + +extern void +sm_perror __P(( + const char *)); + +__END_DECLS + +/* +** Functions internal to the implementation. +*/ + +__BEGIN_DECLS +int sm_rget __P((SM_FILE_T *, int)); +int sm_vfscanf __P((SM_FILE_T *, int SM_NONVOLATILE, const char *, + va_list SM_NONVOLATILE)); +int sm_wbuf __P((SM_FILE_T *, int, int)); +__END_DECLS + +/* +** The macros are here so that we can +** define function versions in the library. +*/ + +#define sm_getc(f, t) \ + (--(f)->f_r < 0 ? \ + sm_rget(f, t) : \ + (int)(*(f)->f_p++)) + +/* +** This has been tuned to generate reasonable code on the vax using pcc. +** (It also generates reasonable x86 code using gcc.) +*/ + +#define sm_putc(f, t, c) \ + (--(f)->f_w < 0 ? \ + (f)->f_w >= (f)->f_lbfsize ? \ + (*(f)->f_p = (c)), *(f)->f_p != '\n' ? \ + (int)*(f)->f_p++ : \ + sm_wbuf(f, t, '\n') : \ + sm_wbuf(f, t, (int)(c)) : \ + (*(f)->f_p = (c), (int)*(f)->f_p++)) + +#define sm_eof(p) (((p)->f_flags & SMFEOF) != 0) +#define sm_error(p) (((p)->f_flags & SMERR) != 0) +#define sm_clearerr(p) ((void)((p)->f_flags &= ~(SMERR|SMFEOF))) + +#define sm_io_eof(p) sm_eof(p) +#define sm_io_error(p) sm_error(p) + +#define sm_io_clearerr(p) sm_clearerr(p) + +#ifndef lint +# ifndef _POSIX_SOURCE +# define sm_io_getc(fp, t) sm_getc(fp, t) +# define sm_io_putc(fp, t, x) sm_putc(fp, t, x) +# endif /* _POSIX_SOURCE */ +#endif /* lint */ + +#endif /* SM_IO_H */ |
