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Annotation of researchv10no/cmd/lcc/ph/scanf.tbl, revision 1.1

1.1     ! root        1:                 scanf format string decision tree
        !             2:                 ----- ------ ------ -------- ----
        !             3: 
        !             4: misc:
        !             5:     extra arguments are ignored
        !             6: 
        !             7: 
        !             8: d
        !             9:     size indicator:
        !            10:         h   pointer to short int
        !            11:         l   pointer to long int
        !            12:         L   UNDEFINED
        !            13:     conversion:
        !            14:         signed integer (same as strtol base 10)
        !            15:         argument is pointer to int
        !            16: 
        !            17: i
        !            18:     size indicator:
        !            19:         h   pointer to short int
        !            20:         l   pointer to long int
        !            21:         L   UNDEFINED
        !            22:     conversion:
        !            23:         signed integer (same as strtol base 0)
        !            24:         argument is pointer to int
        !            25: 
        !            26: o
        !            27:     size indicator:
        !            28:         h   pointer to unsigned short
        !            29:         l   pointer to unsigned long
        !            30:         L   UNDEFINED
        !            31:     conversion:
        !            32:         unsigned integer (same as strtoul base 8)
        !            33:         argument is pointer to unsigned int
        !            34: 
        !            35: u
        !            36:     size indicator:
        !            37:         h   pointer to unsigned short
        !            38:         l   pointer to unsigned long
        !            39:         L   UNDEFINED
        !            40:     conversion:
        !            41:         unsigned integer (same as strtoul base 10)
        !            42:         argument is pointer to unsigned int
        !            43: 
        !            44: x,X
        !            45:     size indicator:
        !            46:         h   pointer to unsigned short
        !            47:         l   pointer to unsigned long
        !            48:         L   UNDEFINED
        !            49:     conversion:
        !            50:     argument is pointer to float
        !            51: 
        !            52: s
        !            53:     size indicator:
        !            54:         h   UNDEFINED
        !            55:         l   UNDEFINED
        !            56:         L   UNDEFINED
        !            57:     conversion:
        !            58:         sequence of non-whitespace characters
        !            59: 
        !            60: [
        !            61:     size indicator:
        !            62:         h   UNDEFINED
        !            63:         l   UNDEFINED
        !            64:         L   UNDEFINED
        !            65:     conversion:
        !            66:         matches non-empty set of characters fromthe "scanset"
        !            67:         argument is pointer to array large enough to recieve input string
        !            68:         scanset:
        !            69:             all characters between [ and  ]
        !            70:             all characters not between [^ and ]
        !            71:             the beginning sequences [] and [^] mean that ] is in the list
        !            72:             '-' is implementation defined unless as [-   [^-   []-   or [^]-
        !            73:             chargument is char *
        !            74: 
        !            75: c
        !            76:     size indicator:
        !            77:         h   UNDEFINED
        !            78:         l   UNDEFINED
        !            79:         L   UNDEFINED
        !            80:     conversion:
        !            81:         match characters up to field width
        !            82:         default if no width is 1
        !            83:         no null character is added
        !            84:         argument is char *
        !            85:     
        !            86: p
        !            87:     size indicator:
        !            88:         h   UNDEFINED
        !            89:         l   UNDEFINED
        !            90:         L   UNDEFINED
        !            91:     conversion:
        !            92:         matches text produced by printf %p
        !            93:         printf -> scanf with %p must produce the same pointer back
        !            94:         argument is pointer to void *
        !            95: 
        !            96: n
        !            97:     size indicator:
        !            98:         h   pointer to short int
        !            99:         l   pointer to long int
        !           100:         L   UNDEFINED
        !           101:     conversion:
        !           102:         no input consumed and argument count not incremented
        !           103:         argument is pointer to int
        !           104:         write number of characters consumed
        !           105: 
        !           106: misc:
        !           107:     %% is escape to match % in input
        !           108:     width specifies max characters matched
        !           109:     whitespace means to skip leading white space up to end of input
        !           110:     multibyte characters means to read as long as match occurs (no assignment)
        !           111:     input conversion is processed as:
        !           112:         skip whitespace unless there is a c, [, or n specifier
        !           113:         read an item fromthe input unless processing an 'n' specifier
        !           114:         read longest possible match up to width specifier
        !           115:         if no characters read, it is a matching failure
        !           116:         * suppresses assignment 
        !           117:     success leaves trailing whitespace unless there is whiatespace
        !           118:             at the end of the directive
        !           119:     input failure or matching failure leave next character on the input
        !           120:     EOF returned if end of input before any conversions
        !           121:     return number of conversions performed, may be less than
        !           122:         requeted if matchin or input failure occurs

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