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Annotation of coherent/d/bin/awk/Changes, revision 1.1

1.1     ! root        1: Awk had the following problem.
        !             2: 
        !             3: Normally tokens are delimited by whitespace rules. That is any
        !             4: number of spaces or tabs counts as a single delimiter. In normal
        !             5: awk as long as FS = " \t" whitespace rules always apply. If FS
        !             6: is anything else normal delimeter rules should apply. That is if
        !             7: FS=":" the line a::c has 3 tokens, a, NULL, and c.
        !             8: 
        !             9: We were always applying whitespace rules. That is with FS=":"
        !            10: a::c had two tokens a and c.
        !            11: 
        !            12: This is now fixed.
        !            13: ---------------------------------------------------------------
        !            14: 
        !            15: Awk had the following problem
        !            16: { print ($1 + 10) * 5 }
        !            17: Gave a syntax error because print ( was detected first.
        !            18: 
        !            19: This is now fixed.
        !            20: 
        !            21: Steve made an improved make that uses $SRCPATH the Makefile now
        !            22: takes advantage of this.
        !            23: ---------------------------------------------------------------
        !            24: 
        !            25: Awk had the following problem
        !            26: \ new line did not allow continuation lines.
        !            27: { print \
        !            28:        $1 }
        !            29: Gave a syntax error.
        !            30: This is now fixed.
        !            31: ---------------------------------------------------------------
        !            32: 
        !            33: Awk had the following problem.
        !            34: There was no provision for unary minus. It was treated as
        !            35: a syntax error.
        !            36: 
        !            37: This is now fixed.
        !            38: 
        !            39: ---------------------------------------------------------------
        !            40: 
        !            41: Awk had the following bug. The input line
        !            42:        b       c
        !            43: Intrepeted b as field 1 and c as field 2.
        !            44: 
        !            45: This is now fixed. b is field 2 and c is field 3.
        !            46: 
        !            47: ---------------------------------------------------------------
        !            48: If awk tried to store at say $3 on a line with only one field It
        !            49: would end up storing at the famous unitialized pointer. Now it
        !            50: will attempt to add the correct number of trailing delimeters
        !            51: and then add the field at the end. If white space rules are in
        !            52: effect and more than one trailing delimeter is needed there will
        !            53: be a warning message and the field will be added at the end as
        !            54: though whitespace rules were not in effect.
        !            55: 
        !            56: ---------------------------------------------------------------
        !            57: Awk would not allow concatination as a pattern.
        !            58: ($1 $2) == "abc" {     some stuff      }
        !            59: Was a syntax error. This now works.
        !            60: 
        !            61: ---------------------------------------------------------------
        !            62: If awk used a split() to break up a line multiple delimeters
        !            63: were always counted as one and leading delimeters were skipped.
        !            64: This is now fixed.
        !            65: 
        !            66: ---------------------------------------------------------------
        !            67: If awk tried to store $3 on a line with an insufficient number
        !            68: of fields and trailing delimeters it added new delimeters
        !            69: without removing the old ones.
        !            70: ---------------------------------------------------------------
        !            71: Awk reported the wrong number of fields where there were trailing
        !            72: delimeters. It failed to update the number of fields when new
        !            73: fields were added at the end. This is fixed. (awk[35].c)
        !            74: ---------------------------------------------------------------
        !            75: Awk did not accept names with underscores. This is fixed (awk1.c)
        !            76: ---------------------------------------------------------------
        !            77: Thu Feb  4 13:50:09 1993 PST
        !            78: Changes by steve to support "for (; cond; incr)" with absent initializer:
        !            79: awk.h  Deleted bogus sprintf declaration.
        !            80: awk.y  Added new FOR_ production with absent initializer.
        !            81: awk3.c Changed AFOR code to evaluate initializer only if present.
        !            82: ---------------------------------------------------------------

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