feat(text): Add CHAR function.

formulas/functions/text.py

@@ -21,6 +21,247 @@
 
 FUNCTIONS = {}
 
+codes = {
+    9: "\t",
+    10: "\n",
+    32: " ",
+    33: "!",
+    34: '"',
+    35: "#",
+    36: "$",
+    37: "%",
+    38: "&",
+    39: "'",
+    40: "(",
+    41: ")",
+    42: "*",
+    43: "+",
+    44: ",",
+    45: "-",
+    46: ".",
+    47: "/",
+    48: "0",
+    49: "1",
+    50: "2",
+    51: "3",
+    52: "4",
+    53: "5",
+    54: "6",
+    55: "7",
+    56: "8",
+    57: "9",
+    58: ":",
+    59: ";",
+    60: "<",
+    61: "=",
+    62: ">",
+    63: "?",
+    64: "@",
+    65: "A",
+    66: "B",
+    67: "C",
+    68: "D",
+    69: "E",
+    70: "F",
+    71: "G",
+    72: "H",
+    73: "I",
+    74: "J",
+    75: "K",
+    76: "L",
+    77: "M",
+    78: "N",
+    79: "O",
+    80: "P",
+    81: "Q",
+    82: "R",
+    83: "S",
+    84: "T",
+    85: "U",
+    86: "V",
+    87: "W",
+    88: "X",
+    89: "Y",
+    90: "Z",
+    91: "[",
+    92: "\\",
+    93: "]",
+    94: "^",
+    95: "_",
+    96: "`",
+    97: "a",
+    98: "b",
+    99: "c",
+    100: "d",
+    101: "e",
+    102: "f",
+    103: "g",
+    104: "h",
+    105: "i",
+    106: "j",
+    107: "k",
+    108: "l",
+    109: "m",
+    110: "n",
+    111: "o",
+    112: "p",
+    113: "q",
+    114: "r",
+    115: "s",
+    116: "t",
+    117: "u",
+    118: "v",
+    119: "w",
+    120: "x",
+    121: "y",
+    122: "z",
+    123: "{",
+    124: "|",
+    125: "}",
+    126: "~",
+    127: "",
+    128: "Ä",
+    129: "Å",
+    130: "Ç",
+    131: "É",
+    132: "Ñ",
+    133: "Ö",
+    134: "Ü",
+    135: "á",
+    136: "à",
+    137: "â",
+    138: "ä",
+    139: "ã",
+    140: "å",
+    141: "ç",
+    142: "é",
+    143: "è",
+    144: "ê",
+    145: "ë",
+    146: "í",
+    147: "ì",
+    148: "î",
+    149: "ï",
+    150: "ñ",
+    151: "ó",
+    152: "ò",
+    153: "ô",
+    154: "ö",
+    155: "õ",
+    156: "ú",
+    157: "ù",
+    158: "û",
+    159: "ü",
+    160: "†",
+    161: "°",
+    162: "¢",
+    163: "£",
+    164: "§",
+    165: "•",
+    166: "¶",
+    167: "ß",
+    168: "®",
+    169: "©",
+    170: "™",
+    171: "´",
+    172: "¨",
+    173: "≠",
+    174: "Æ",
+    175: "Ø",
+    176: "∞",
+    177: "±",
+    178: "≤",
+    179: "≥",
+    180: "¥",
+    181: "µ",
+    182: "∂",
+    183: "∑",
+    184: "∏",
+    185: "π",
+    186: "∫",
+    187: "ª",
+    188: "º",
+    189: "Ω",
+    190: "æ",
+    191: "ø",
+    192: "¿",
+    193: "¡",
+    194: "¬",
+    195: "√",
+    196: "ƒ",
+    197: "≈",
+    198: "∆",
+    199: "«",
+    200: "»",
+    201: "…",
+    202: " ",
+    203: "À",
+    204: "Ã",
+    205: "Õ",
+    206: "Œ",
+    207: "œ",
+    208: "–",
+    209: "—",
+    210: "“",
+    211: "”",
+    212: "‘",
+    213: "’",
+    214: "÷",
+    215: "◊",
+    216: "ÿ",
+    217: "Ÿ",
+    218: "⁄",
+    219: "€",
+    220: "‹",
+    221: "›",
+    222: "fi",
+    223: "fl",
+    224: "‡",
+    225: "·",
+    226: "‚",
+    227: "„",
+    228: "‰",
+    229: "Â",
+    230: "Ê",
+    231: "Á",
+    232: "Ë",
+    233: "È",
+    234: "Í",
+    235: "Î",
+    236: "Ï",
+    237: "Ì",
+    238: "Ó",
+    239: "Ô",
+    240: "",
+    241: "Ò",
+    242: "Ú",
+    243: "Û",
+    244: "Ù",
+    245: "ı",
+    246: "ˆ",
+    247: "˜",
+    248: "¯",
+    249: "˘",
+    250: "˙",
+    251: "˚",
+    252: "¸",
+    253: "˝",
+    254: "˛",
+    255: "ˇ"
+}
+
+
+def xchar(number):
+    number = int(number)
+    if 0 < number <= 255:
+        if number in codes:
+            return codes[number]
+        return f'_x{hex(number)[2:].upper():0>4}_'
+    return Error.errors['#VALUE!']
+
+
+FUNCTIONS['CHAR'] = wrap_ufunc(xchar)
+
 
 def _str(text):
     if isinstance(text, bool):

test/test_cell.py

@@ -23,6 +23,8 @@ def inp_ranges(*rng):
 @ddt.ddt
 class TestCell(unittest.TestCase):
     @ddt.idata([
+        ('A1', '=CHAR(1)', {}, '<Ranges>(A1)=[[\'_x0001_\']]'),
+        ('A1', '=CHAR(157)', {}, '<Ranges>(A1)=[[\'ù\']]'),
         ('A1', '=TEXT("a", "mm")', {}, '<Ranges>(A1)=[[\'a\']]'),
         ('A1', '=VALUE("26/08/1987 12:00")', {},
          '<Ranges>(A1)=[[32015.5]]'),