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      1 /*	$NetBSD: name_code.c,v 1.2 2017/02/14 01:16:49 christos Exp $	*/
      2 
      3 /*++
      4 /* NAME
      5 /*	name_code 3
      6 /* SUMMARY
      7 /*	name to number table mapping
      8 /* SYNOPSIS
      9 /*	#include <name_code.h>
     10 /*
     11 /*	typedef struct {
     12 /* .in +4
     13 /*		const char *name;
     14 /*		int code;
     15 /* .in -4
     16 /*	} NAME_CODE;
     17 /*
     18 /*	int	name_code(table, flags, name)
     19 /*	const NAME_CODE *table;
     20 /*	int	flags;
     21 /*	const char *name;
     22 /*
     23 /*	const char *str_name_code(table, code)
     24 /*	const NAME_CODE *table;
     25 /*	int	code;
     26 /* DESCRIPTION
     27 /*	This module does simple name<->number mapping. The process
     28 /*	is controlled by a table of (name, code) values.
     29 /*	The table is terminated with a null pointer and a code that
     30 /*	corresponds to "name not found".
     31 /*
     32 /*	name_code() looks up the code that corresponds with the name.
     33 /*	The lookup is case insensitive. The flags argument specifies
     34 /*	zero or more of the following:
     35 /* .IP NAME_CODE_FLAG_STRICT_CASE
     36 /*	String lookups are case sensitive.
     37 /* .PP
     38 /*	For convenience the constant NAME_CODE_FLAG_NONE requests
     39 /*	no special processing.
     40 /*
     41 /*	str_name_code() translates a number to its equivalent string.
     42 /* DIAGNOSTICS
     43 /*	When the search fails, the result is the "name not found" code
     44 /*	or the null pointer, respectively.
     45 /* LICENSE
     46 /* .ad
     47 /* .fi
     48 /*	The Secure Mailer license must be distributed with this software.
     49 /* AUTHOR(S)
     50 /*	Wietse Venema
     51 /*	IBM T.J. Watson Research
     52 /*	P.O. Box 704
     53 /*	Yorktown Heights, NY 10598, USA
     54 /*--*/
     55 
     56 /* System library. */
     57 
     58 #include <sys_defs.h>
     59 #include <string.h>
     60 
     61 /* Utility library. */
     62 
     63 #include <name_code.h>
     64 
     65 /* name_code - look up code by name */
     66 
     67 int     name_code(const NAME_CODE *table, int flags, const char *name)
     68 {
     69     const NAME_CODE *np;
     70     int     (*lookup) (const char *, const char *);
     71 
     72     if (flags & NAME_CODE_FLAG_STRICT_CASE)
     73 	lookup = strcmp;
     74     else
     75 	lookup = strcasecmp;
     76 
     77     for (np = table; np->name; np++)
     78 	if (lookup(name, np->name) == 0)
     79 	    break;
     80     return (np->code);
     81 }
     82 
     83 /* str_name_code - look up name by code */
     84 
     85 const char *str_name_code(const NAME_CODE *table, int code)
     86 {
     87     const NAME_CODE *np;
     88 
     89     for (np = table; np->name; np++)
     90 	if (code == np->code)
     91 	    break;
     92     return (np->name);
     93 }
     94