attr.h

[詳解]

#ifndef _ATTR_H_INCLUDED_
#define _ATTR_H_INCLUDED_

/*++
/* NAME
/*  attr 3h
/* SUMMARY
/*  attribute list manipulations
/* SYNOPSIS
/*  #include "attr.h"
 DESCRIPTION
 .nf

 /*
  * System library.
  */
#include <stdarg.h>

 /*
  * Utility library.
  */
#include <vstream.h>
#include <vstring.h>
#include <htable.h>
#include <nvtable.h>
#include <check_arg.h>

 /*
  * Delegation for better data abstraction.
  */
typedef int (*ATTR_SCAN_MASTER_FN) (VSTREAM *, int,...);
typedef int (*ATTR_SCAN_SLAVE_FN) (ATTR_SCAN_MASTER_FN, VSTREAM *, int, void *);
typedef int (*ATTR_PRINT_MASTER_FN) (VSTREAM *, int,...);
typedef int (*ATTR_PRINT_SLAVE_FN) (ATTR_PRINT_MASTER_FN, VSTREAM *, int, void *);

 /*
  * Attribute types. See attr_scan(3) for documentation.
  */
#define ATTR_TYPE_END       0   /* end of data */
#define ATTR_TYPE_INT       1   /* Unsigned integer */
#define ATTR_TYPE_NUM       ATTR_TYPE_INT
#define ATTR_TYPE_STR       2   /* Character string */
#define ATTR_TYPE_HASH      3   /* Hash table */
#define ATTR_TYPE_NV        3   /* Name-value table */
#define ATTR_TYPE_LONG      4   /* Unsigned long */
#define ATTR_TYPE_DATA      5   /* Binary data */
#define ATTR_TYPE_FUNC      6   /* Function pointer */

 /*
  * Optional sender-specified grouping for hash or nameval tables.
  */
#define ATTR_TYPE_OPEN      '{'
#define ATTR_TYPE_CLOSE     '}'
#define ATTR_NAME_OPEN      "{"
#define ATTR_NAME_CLOSE     "}"

#define ATTR_HASH_LIMIT     1024    /* Size of hash table */

 /*
  * Typechecking support for variadic function arguments. See check_arg(3h)
  * for documentation.
  */
#define SEND_ATTR_INT(name, val)    ATTR_TYPE_INT, CHECK_CPTR(ATTR, char, (name)), CHECK_VAL(ATTR, int, (val))
#define SEND_ATTR_STR(name, val)    ATTR_TYPE_STR, CHECK_CPTR(ATTR, char, (name)), CHECK_CPTR(ATTR, char, (val))
#define SEND_ATTR_HASH(val)     ATTR_TYPE_HASH, CHECK_CPTR(ATTR, HTABLE, (val))
#define SEND_ATTR_NV(val)       ATTR_TYPE_NV, CHECK_CPTR(ATTR, NVTABLE, (val))
#define SEND_ATTR_LONG(name, val)   ATTR_TYPE_LONG, CHECK_CPTR(ATTR, char, (name)), CHECK_VAL(ATTR, long, (val))
#define SEND_ATTR_DATA(name, len, val)  ATTR_TYPE_DATA, CHECK_CPTR(ATTR, char, (name)), CHECK_VAL(ATTR, ssize_t, (len)), CHECK_CPTR(ATTR, void, (val))
#define SEND_ATTR_FUNC(func, val)   ATTR_TYPE_FUNC, CHECK_VAL(ATTR, ATTR_PRINT_SLAVE_FN, (func)), CHECK_CPTR(ATTR, void, (val))

#define RECV_ATTR_INT(name, val)    ATTR_TYPE_INT, CHECK_CPTR(ATTR, char, (name)), CHECK_PTR(ATTR, int, (val))
#define RECV_ATTR_STR(name, val)    ATTR_TYPE_STR, CHECK_CPTR(ATTR, char, (name)), CHECK_PTR(ATTR, VSTRING, (val))
#define RECV_ATTR_HASH(val)     ATTR_TYPE_HASH, CHECK_PTR(ATTR, HTABLE, (val))
#define RECV_ATTR_NV(val)       ATTR_TYPE_NV, CHECK_PTR(ATTR, NVTABLE, (val))
#define RECV_ATTR_LONG(name, val)   ATTR_TYPE_LONG, CHECK_CPTR(ATTR, char, (name)), CHECK_PTR(ATTR, long, (val))
#define RECV_ATTR_DATA(name, val)   ATTR_TYPE_DATA, CHECK_CPTR(ATTR, char, (name)), CHECK_PTR(ATTR, VSTRING, (val))
#define RECV_ATTR_FUNC(func, val)   ATTR_TYPE_FUNC, CHECK_VAL(ATTR, ATTR_SCAN_SLAVE_FN, (func)), CHECK_PTR(ATTR, void, (val))

CHECK_VAL_HELPER_DCL(ATTR, ssize_t);
CHECK_VAL_HELPER_DCL(ATTR, long);
CHECK_VAL_HELPER_DCL(ATTR, int);
CHECK_PTR_HELPER_DCL(ATTR, void);
CHECK_PTR_HELPER_DCL(ATTR, long);
CHECK_PTR_HELPER_DCL(ATTR, int);
CHECK_PTR_HELPER_DCL(ATTR, VSTRING);
CHECK_PTR_HELPER_DCL(ATTR, NVTABLE);
CHECK_PTR_HELPER_DCL(ATTR, HTABLE);
CHECK_CPTR_HELPER_DCL(ATTR, void);
CHECK_CPTR_HELPER_DCL(ATTR, char);
CHECK_CPTR_HELPER_DCL(ATTR, NVTABLE);
CHECK_CPTR_HELPER_DCL(ATTR, HTABLE);
CHECK_VAL_HELPER_DCL(ATTR, ATTR_PRINT_SLAVE_FN);
CHECK_VAL_HELPER_DCL(ATTR, ATTR_SCAN_SLAVE_FN);

 /*
  * Flags that control processing. See attr_scan(3) for documentation.
  */
#define ATTR_FLAG_NONE      0
#define ATTR_FLAG_MISSING   (1<<0)  /* Flag missing attribute */
#define ATTR_FLAG_EXTRA     (1<<1)  /* Flag spurious attribute */
#define ATTR_FLAG_MORE      (1<<2)  /* Don't skip or terminate */

#define ATTR_FLAG_STRICT    (ATTR_FLAG_MISSING | ATTR_FLAG_EXTRA)
#define ATTR_FLAG_ALL       (07)

 /*
  * Default to null-terminated, as opposed to base64-encoded.
  */
#define attr_print  attr_print0
#define attr_vprint attr_vprint0
#define attr_scan   attr_scan0
#define attr_vscan  attr_vscan0
#define attr_scan_more  attr_scan_more0

 /*
  * attr_print64.c.
  */
extern int attr_print64(VSTREAM *, int,...);
extern int attr_vprint64(VSTREAM *, int, va_list);

 /*
  * attr_scan64.c.
  */
extern int WARN_UNUSED_RESULT attr_scan64(VSTREAM *, int,...);
extern int WARN_UNUSED_RESULT attr_vscan64(VSTREAM *, int, va_list);
extern int WARN_UNUSED_RESULT attr_scan_more64(VSTREAM *);

 /*
  * attr_print0.c.
  */
extern int attr_print0(VSTREAM *, int,...);
extern int attr_vprint0(VSTREAM *, int, va_list);

 /*
  * attr_scan0.c.
  */
extern int WARN_UNUSED_RESULT attr_scan0(VSTREAM *, int,...);
extern int WARN_UNUSED_RESULT attr_vscan0(VSTREAM *, int, va_list);
extern int WARN_UNUSED_RESULT attr_scan_more0(VSTREAM *);

 /*
  * attr_scan_plain.c.
  */
extern int attr_print_plain(VSTREAM *, int,...);
extern int attr_vprint_plain(VSTREAM *, int, va_list);
extern int attr_scan_more_plain(VSTREAM *);

 /*
  * attr_print_plain.c.
  */
extern int WARN_UNUSED_RESULT attr_scan_plain(VSTREAM *, int,...);
extern int WARN_UNUSED_RESULT attr_vscan_plain(VSTREAM *, int, va_list);

 /*
  * Attribute names for testing the compatibility of the read and write
  * routines.
  */
#ifdef TEST
#define ATTR_NAME_INT       "number"
#define ATTR_NAME_STR       "string"
#define ATTR_NAME_LONG      "long_number"
#define ATTR_NAME_DATA      "data"
#endif

/* LICENSE
/* .ad
/* .fi
/*  The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*  Wietse Venema
/*  IBM T.J. Watson Research
/*  P.O. Box 704
/*  Yorktown Heights, NY 10598, USA
/*
/*  Wietse Venema
/*  Google, Inc.
/*  111 8th Avenue
/*  New York, NY 10011, USA
/*--*/

#endif