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Annotation of researchv10dc/man/adm/man3/atof.3, revision 1.1

1.1     ! root        1: .TH ATOF 3
        !             2: .CT 2 data_man math
        !             3: .SH NAME
        !             4: atof, atoi, atol, strtod, strtol, strtoul \(mi convert ASCII to numbers
        !             5: .SH SYNOPSIS
        !             6: .nf
        !             7: .B double atof(nptr)
        !             8: .B char *nptr;
        !             9: .PP
        !            10: .B int atoi(nptr)
        !            11: .B char *nptr;
        !            12: .PP
        !            13: .B long atol(nptr)
        !            14: .B char *nptr;
        !            15: .PP
        !            16: .B double strtod(nptr, rptr)
        !            17: .B char *nptr, **rptr;
        !            18: .PP
        !            19: .B "long strtol(nptr, rptr, base)
        !            20: .B char *nptr, **rptr;
        !            21: .PP
        !            22: .B "unsigned long strtoul(nptr, rptr, base)
        !            23: .B char *nptr, **rptr;
        !            24: .fi
        !            25: .SH DESCRIPTION
        !            26: .IR Atof ,
        !            27: .IR atoi ,
        !            28: and
        !            29: .I atol
        !            30: convert a string pointed to by
        !            31: .I nptr
        !            32: to floating, integer, and long integer
        !            33: representation respectively.
        !            34: The first unrecognized character ends the string.
        !            35: .PP
        !            36: .I Atof
        !            37: recognizes an optional string of tabs and spaces,
        !            38: then an optional sign, then
        !            39: a string of digits optionally containing a decimal
        !            40: point, then an optional 
        !            41: .L e
        !            42: or 
        !            43: .L E
        !            44: followed
        !            45: by an optionally signed integer.
        !            46: .PP
        !            47: .I Atoi
        !            48: and
        !            49: .I atol
        !            50: recognize an optional string of tabs and spaces,
        !            51: then an optional sign, then a string of
        !            52: decimal digits.
        !            53: .PP
        !            54: .I Strtod,
        !            55: .I strtol,
        !            56: and
        !            57: .I strtoul,
        !            58: behave similarly to 
        !            59: .I atof,
        !            60: and
        !            61: .I atol
        !            62: and, if
        !            63: .I rptr
        !            64: is not zero, set
        !            65: .I *rptr
        !            66: to point to the input character
        !            67: immediately after the string converted.
        !            68: .PP
        !            69: .I Strtol
        !            70: and
        !            71: .I strtoul
        !            72: interpret the digit string in the specified
        !            73: .I base,
        !            74: from 2 to 36,
        !            75: each digit being less than the base.
        !            76: Digits with value over 9 are represented by letters,
        !            77: a-z or A-Z.
        !            78: If
        !            79: .I base
        !            80: is 0, the input is interpreted as an integral constant in
        !            81: the style of C (with no suffixed type indicators):
        !            82: numbers are octal if they begin with
        !            83: .LR 0 ,
        !            84: hexadecimal if they begin with
        !            85: .L 0x
        !            86: or
        !            87: .LR 0X ,
        !            88: otherwise decimal.
        !            89: .I Strtoul
        !            90: does not recognize signs.
        !            91: .SH SEE ALSO
        !            92: .IR scanf (3)
        !            93: .SH DIAGNOSTICS
        !            94: Zero is returned if the begining of the input string is not
        !            95: interpretable as a number.
        !            96: .PP
        !            97: If overflow is detected by
        !            98: .I atof,
        !            99: .I strtod,
        !           100: .I strtol,
        !           101: or
        !           102: .I strtoul, 
        !           103: a maximum value of the correct sign is returned and
        !           104: .I errno
        !           105: is set to
        !           106: .BR ERANGE .
        !           107: .SH BUGS
        !           108: .I Atoi
        !           109: and
        !           110: .I atol
        !           111: have no provisions for overflow.

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