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Annotation of 43BSD/usr.lib/sendmail/aux/matchhdr.c, revision 1.1

1.1     ! root        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: }

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