4.3BSD - /usr/src/usr.lib/sendmail/aux/matchhdr.c

   1: /*
   2: **  Sendmail
   3: **  Copyright (c) 1983  Eric P. Allman
   4: **  Berkeley, California
   5: **
   6: **  Copyright (c) 1983 Regents of the University of California.
   7: **  All rights reserved.  The Berkeley software License Agreement
   8: **  specifies the terms and conditions for redistribution.
   9: */
  10: 
  11: #ifndef lint
  12: static char SccsId[] = "@(#)matchhdr.c	5.1 (Berkeley) 6/7/85";
  13: #endif not lint
  14: 
  15: # include <stdio.h>
  16: # include <ctype.h>
  17: # include "useful.h"
  18: 
  19: SCCSID(@(#)matchhdr.c	5.1		6/7/85);
  20: 
  21: /*
  22: **  MATCHHDR -- Match header line
  23: **
  24: **	Matches a header line in arpanet format (case and white
  25: **	space is ignored).
  26: **
  27: **	This routine is used by arpa-mailer and sendmail.
  28: **
  29: **	Parameters:
  30: **		line -- the line to match against.
  31: **		pat -- the pattern to match against; must be in
  32: **			lower case.
  33: **
  34: **	Returns:
  35: **		address of the 'value' of the pattern (the beginning
  36: **			of the non-white string following the delim).
  37: **		NULL if none found.
  38: **
  39: **	Side Effects:
  40: **		none
  41: **
  42: **	Called By:
  43: **		maketemp
  44: **		sendmail [arpa.c]
  45: **
  46: **	Deficiencies:
  47: **		It doesn't handle folded lines.
  48: */
  49: 
  50: char *
  51: matchhdr(line, pat)
  52:     char *line;
  53:     char *pat;
  54: {
  55:     register char *p;
  56:     register char *q;
  57: 
  58:     for (q = pat, p = line; *q != '\0'; p++, q++)
  59:         if (lowercase(*p) != *q)
  60:             return (NULL);
  61:     while (isspace(*p))
  62:         p++;
  63:     if (*p != ':')
  64:         return (NULL);
  65:     while (isspace(*++p))
  66:         continue;
  67:     return (*p == '\0' ? NULL : p);
  68: }
  69: /*
  70: **  LOWERCASE -- Convert a character to lower case
  71: **
  72: **	If the argument is an upper case letter, it is converted
  73: **	to a lower case letter, otherwise it is passed through
  74: **	unchanged.
  75: **
  76: **	Parameters:
  77: **		c -- the character to check.
  78: **
  79: **	Returns:
  80: **		c converted to lower case.
  81: **
  82: **	Side Effects:
  83: **		none
  84: **
  85: **	Called By:
  86: **		matchhdr
  87: */
  88: 
  89: lowercase(c)
  90:     register char c;
  91: {
  92:     if (isupper(c))
  93:         c -= 'A' - 'a';
  94:     return (c);
  95: }

Defined functions

Defined variables