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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1186 | savelij | 1 | /* decpseudo.c */ |
| 2 | /*****************************************************************************/ |
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| 3 | /* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only */ |
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| 4 | /* */ |
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| 5 | /* AS */ |
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| 6 | /* */ |
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| 7 | /* Commonly Used VAX/PDP-11 Pseudo Instructions */ |
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| 8 | /* */ |
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| 9 | /*****************************************************************************/ |
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| 10 | |||
| 11 | /***************************************************************************** |
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| 12 | * Includes |
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| 13 | *****************************************************************************/ |
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| 14 | |||
| 15 | #include "stdinc.h" |
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| 16 | #include <string.h> |
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| 17 | |||
| 18 | #include "strutil.h" |
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| 19 | #include "asmdef.h" |
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| 20 | #include "asmpars.h" |
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| 21 | #include "asmerr.h" |
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| 22 | #include "errmsg.h" |
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| 23 | |||
| 24 | #include "decpseudo.h" |
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| 25 | |||
| 26 | /***************************************************************************** |
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| 27 | * Global Types |
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| 28 | *****************************************************************************/ |
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| 29 | |||
| 30 | /*!------------------------------------------------------------------------ |
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| 31 | * \fn decode_dec_packed(Word index) |
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| 32 | * \brief encode number or decimal string in packed decimal format |
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| 33 | * ------------------------------------------------------------------------ */ |
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| 34 | |||
| 35 | static void append_digit(Byte digit, Boolean *p_half) |
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| 36 | { |
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| 37 | if (*p_half) |
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| 38 | { |
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| 39 | BAsmCode[CodeLen] |= (digit & 15); |
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| 40 | CodeLen++; |
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| 41 | switch (ListGrans[ActPC]) |
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| 42 | { |
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| 43 | case 1: |
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| 44 | break; |
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| 45 | case 2: |
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| 46 | if (!(CodeLen & 1)) |
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| 47 | WAsmCode[(CodeLen / 2) - 1] = ((Word)BAsmCode[CodeLen - 1]) << 8 | BAsmCode[CodeLen - 2]; |
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| 48 | break; |
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| 49 | } |
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| 50 | } |
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| 51 | else |
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| 52 | { |
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| 53 | SetMaxCodeLen(CodeLen + 1); |
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| 54 | BAsmCode[CodeLen] = (digit & 15) << 4; |
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| 55 | } |
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| 56 | *p_half = !*p_half; |
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| 57 | } |
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| 58 | |||
| 59 | void decode_dec_packed(Word index) |
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| 60 | { |
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| 61 | TempResult value; |
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| 62 | const char *p_str = NULL; |
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| 63 | char tmp_dec_str[33]; |
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| 64 | |||
| 65 | UNUSED(index); |
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| 66 | |||
| 67 | if (!ChkArgCnt(1, 2)) |
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| 68 | return; |
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| 69 | |||
| 70 | as_tempres_ini(&value); |
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| 71 | EvalStrExpression(&ArgStr[1], &value); |
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| 72 | switch (value.Typ) |
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| 73 | { |
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| 74 | case TempNone: |
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| 75 | break; |
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| 76 | case TempInt: |
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| 77 | as_snprintf(tmp_dec_str, sizeof(tmp_dec_str), "%lld", value.Contents.Int); |
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| 78 | p_str = tmp_dec_str; |
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| 79 | goto writeout; |
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| 80 | case TempString: |
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| 81 | p_str = value.Contents.str.p_str; |
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| 82 | goto writeout; |
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| 83 | case TempFloat: |
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| 84 | WrStrErrorPos(ErrNum_StringOrIntButFloat, &ArgStr[1]); |
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| 85 | break; |
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| 86 | default: |
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| 87 | WrStrErrorPos(ErrNum_ExpectIntOrString, &ArgStr[1]); |
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| 88 | break; |
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| 89 | writeout: |
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| 90 | { |
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| 91 | size_t num_digits = 0, l; |
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| 92 | Boolean half, negative; |
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| 93 | |||
| 94 | switch (*p_str) |
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| 95 | { |
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| 96 | case '-': |
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| 97 | negative = True; |
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| 98 | p_str++; |
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| 99 | break; |
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| 100 | case '+': |
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| 101 | negative = False; |
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| 102 | p_str++; |
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| 103 | break; |
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| 104 | default: |
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| 105 | negative = False; |
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| 106 | } |
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| 107 | |||
| 108 | l = strlen(p_str); |
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| 109 | half = False; |
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| 110 | /* leading zero padding digit is not counted into num_digits: */ |
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| 111 | if (!(l & 1)) |
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| 112 | append_digit(0, &half); |
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| 113 | for (; *p_str; p_str++) |
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| 114 | { |
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| 115 | if (!isdigit(*p_str)) |
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| 116 | { |
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| 117 | WrStrErrorPos(ErrNum_InvalidDecDigit, &ArgStr[1]); |
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| 118 | CodeLen = 0; half = False; |
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| 119 | break; |
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| 120 | } |
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| 121 | append_digit(*p_str - '0', &half); |
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| 122 | if (++num_digits > 31) |
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| 123 | { |
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| 124 | WrStrErrorPos(ErrNum_DecStringTooLong, &ArgStr[1]); |
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| 125 | CodeLen = 0; half = False; |
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| 126 | break; |
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| 127 | } |
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| 128 | } |
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| 129 | if (CodeLen || half) |
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| 130 | { |
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| 131 | append_digit(negative ? 13 : 12, &half); |
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| 132 | if (2 == ArgCnt) |
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| 133 | EnterIntSymbol(&ArgStr[2], num_digits, SegNone, False); |
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| 134 | } |
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| 135 | } |
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| 136 | } |
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| 137 | |||
| 138 | as_tempres_free(&value); |
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| 139 | } |