external/ibm-public/postfix/dist/src/util/name_code.c

   1 /*      $NetBSD$        */
   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 #ifdef STRCASECMP_IN_STRINGS_H
  62 #include <strings.h>
  63 #endif
  64
  65 /* Utility library. */
  66
  67 #include <name_code.h>
  68
  69 /* name_code - look up code by name */
  70
  71 int     name_code(const NAME_CODE *table, int flags, const char *name)
  72 {
  73     const NAME_CODE *np;
  74     int     (*lookup) (const char *, const char *);
  75
  76     if (flags & NAME_CODE_FLAG_STRICT_CASE)
  77         lookup = strcmp;
  78     else
  79         lookup = strcasecmp;
  80
  81     for (np = table; np->name; np++)
  82         if (lookup(name, np->name) == 0)
  83             break;
  84     return (np->code);
  85 }
  86
  87 /* str_name_code - look up name by code */
  88
  89 const char *str_name_code(const NAME_CODE *table, int code)
  90 {
  91     const NAME_CODE *np;
  92
  93     for (np = table; np->name; np++)
  94         if (code == np->code)
  95             break;
  96     return (np->name);
  97 }