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Rev | Author | Line No. | Line |
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5222 | serge | 1 | /* This is the Assembler Pre-Processor |
6324 | serge | 2 | Copyright (C) 1987-2015 Free Software Foundation, Inc. |
5222 | serge | 3 | |
4 | This file is part of GAS, the GNU Assembler. |
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5 | |||
6 | GAS is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 3, or (at your option) |
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9 | any later version. |
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10 | |||
11 | GAS is distributed in the hope that it will be useful, but WITHOUT |
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12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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14 | License for more details. |
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15 | |||
16 | You should have received a copy of the GNU General Public License |
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17 | along with GAS; see the file COPYING. If not, write to the Free |
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18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
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19 | 02110-1301, USA. */ |
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20 | |||
21 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */ |
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22 | /* App, the assembler pre-processor. This pre-processor strips out |
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23 | excess spaces, turns single-quoted characters into a decimal |
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24 | constant, and turns the # in # |
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25 | .linefile. This needs better error-handling. */ |
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26 | |||
27 | #include "as.h" |
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28 | |||
29 | #if (__STDC__ != 1) |
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30 | #ifndef const |
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31 | #define const /* empty */ |
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32 | #endif |
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33 | #endif |
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34 | |||
35 | #ifdef H_TICK_HEX |
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36 | int enable_h_tick_hex = 0; |
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37 | #endif |
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38 | |||
39 | #ifdef TC_M68K |
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40 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
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41 | flag_m68k_mri, because the two flags will be affected by the .mri |
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42 | pseudo-op at different times. */ |
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43 | static int scrub_m68k_mri; |
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44 | |||
45 | /* The pseudo-op which switches in and out of MRI mode. See the |
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46 | comment in do_scrub_chars. */ |
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47 | static const char mri_pseudo[] = ".mri 0"; |
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48 | #else |
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49 | #define scrub_m68k_mri 0 |
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50 | #endif |
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51 | |||
52 | #if defined TC_ARM && defined OBJ_ELF |
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53 | /* The pseudo-op for which we need to special-case `@' characters. |
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54 | See the comment in do_scrub_chars. */ |
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55 | static const char symver_pseudo[] = ".symver"; |
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56 | static const char * symver_state; |
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57 | #endif |
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58 | |||
59 | static char lex[256]; |
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60 | static const char symbol_chars[] = |
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61 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
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62 | |||
63 | #define LEX_IS_SYMBOL_COMPONENT 1 |
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64 | #define LEX_IS_WHITESPACE 2 |
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65 | #define LEX_IS_LINE_SEPARATOR 3 |
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66 | #define LEX_IS_COMMENT_START 4 |
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67 | #define LEX_IS_LINE_COMMENT_START 5 |
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68 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 |
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69 | #define LEX_IS_STRINGQUOTE 8 |
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70 | #define LEX_IS_COLON 9 |
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71 | #define LEX_IS_NEWLINE 10 |
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72 | #define LEX_IS_ONECHAR_QUOTE 11 |
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73 | #ifdef TC_V850 |
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74 | #define LEX_IS_DOUBLEDASH_1ST 12 |
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75 | #endif |
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76 | #ifdef TC_M32R |
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77 | #define DOUBLEBAR_PARALLEL |
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78 | #endif |
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79 | #ifdef DOUBLEBAR_PARALLEL |
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80 | #define LEX_IS_DOUBLEBAR_1ST 13 |
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81 | #endif |
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82 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
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83 | #ifdef H_TICK_HEX |
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84 | #define LEX_IS_H 15 |
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85 | #endif |
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86 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
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87 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) |
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88 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) |
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89 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
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90 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
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91 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) |
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92 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) |
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93 | |||
94 | static int process_escape (int); |
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95 | |||
96 | /* FIXME-soon: The entire lexer/parser thingy should be |
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97 | built statically at compile time rather than dynamically |
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98 | each and every time the assembler is run. xoxorich. */ |
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99 | |||
100 | void |
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101 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
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102 | { |
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103 | const char *p; |
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104 | int c; |
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105 | |||
106 | lex[' '] = LEX_IS_WHITESPACE; |
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107 | lex['\t'] = LEX_IS_WHITESPACE; |
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108 | lex['\r'] = LEX_IS_WHITESPACE; |
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109 | lex['\n'] = LEX_IS_NEWLINE; |
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110 | lex[':'] = LEX_IS_COLON; |
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111 | |||
112 | #ifdef TC_M68K |
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113 | scrub_m68k_mri = m68k_mri; |
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114 | |||
115 | if (! m68k_mri) |
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116 | #endif |
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117 | { |
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118 | lex['"'] = LEX_IS_STRINGQUOTE; |
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119 | |||
120 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
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121 | /* I370 uses single-quotes to delimit integer, float constants. */ |
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122 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
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123 | #endif |
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124 | |||
125 | #ifdef SINGLE_QUOTE_STRINGS |
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126 | lex['\''] = LEX_IS_STRINGQUOTE; |
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127 | #endif |
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128 | } |
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129 | |||
130 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop |
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131 | in state 5 of do_scrub_chars must be changed. */ |
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132 | |||
133 | /* Note that these override the previous defaults, e.g. if ';' is a |
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134 | comment char, then it isn't a line separator. */ |
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135 | for (p = symbol_chars; *p; ++p) |
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136 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
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137 | |||
138 | for (c = 128; c < 256; ++c) |
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139 | lex[c] = LEX_IS_SYMBOL_COMPONENT; |
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140 | |||
141 | #ifdef tc_symbol_chars |
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142 | /* This macro permits the processor to specify all characters which |
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143 | may appears in an operand. This will prevent the scrubber from |
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144 | discarding meaningful whitespace in certain cases. The i386 |
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145 | backend uses this to support prefixes, which can confuse the |
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146 | scrubber as to whether it is parsing operands or opcodes. */ |
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147 | for (p = tc_symbol_chars; *p; ++p) |
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148 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
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149 | #endif |
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150 | |||
151 | /* The m68k backend wants to be able to change comment_chars. */ |
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152 | #ifndef tc_comment_chars |
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153 | #define tc_comment_chars comment_chars |
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154 | #endif |
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155 | for (p = tc_comment_chars; *p; p++) |
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156 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
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157 | |||
158 | for (p = line_comment_chars; *p; p++) |
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159 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
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160 | |||
6324 | serge | 161 | #ifndef tc_line_separator_chars |
162 | #define tc_line_separator_chars line_separator_chars |
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163 | #endif |
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164 | for (p = tc_line_separator_chars; *p; p++) |
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5222 | serge | 165 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
166 | |||
167 | #ifdef tc_parallel_separator_chars |
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168 | /* This macro permits the processor to specify all characters which |
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169 | separate parallel insns on the same line. */ |
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170 | for (p = tc_parallel_separator_chars; *p; p++) |
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171 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
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172 | #endif |
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173 | |||
174 | /* Only allow slash-star comments if slash is not in use. |
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175 | FIXME: This isn't right. We should always permit them. */ |
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176 | if (lex['/'] == 0) |
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177 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
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178 | |||
179 | #ifdef TC_M68K |
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180 | if (m68k_mri) |
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181 | { |
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182 | lex['\''] = LEX_IS_STRINGQUOTE; |
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183 | lex[';'] = LEX_IS_COMMENT_START; |
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184 | lex['*'] = LEX_IS_LINE_COMMENT_START; |
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185 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but |
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186 | then it can't be used in an expression. */ |
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187 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
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188 | } |
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189 | #endif |
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190 | |||
191 | #ifdef TC_V850 |
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192 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; |
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193 | #endif |
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194 | #ifdef DOUBLEBAR_PARALLEL |
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195 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
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196 | #endif |
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197 | #ifdef TC_D30V |
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198 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
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199 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
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200 | #endif |
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201 | |||
202 | #ifdef H_TICK_HEX |
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203 | if (enable_h_tick_hex) |
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204 | { |
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205 | lex['h'] = LEX_IS_H; |
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206 | lex['H'] = LEX_IS_H; |
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207 | } |
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208 | #endif |
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209 | } |
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210 | |||
211 | /* Saved state of the scrubber. */ |
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212 | static int state; |
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213 | static int old_state; |
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214 | static char *out_string; |
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215 | static char out_buf[20]; |
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216 | static int add_newlines; |
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217 | static char *saved_input; |
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218 | static size_t saved_input_len; |
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219 | static char input_buffer[32 * 1024]; |
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220 | static const char *mri_state; |
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221 | static char mri_last_ch; |
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222 | |||
223 | /* Data structure for saving the state of app across #include's. Note that |
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224 | app is called asynchronously to the parsing of the .include's, so our |
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225 | state at the time .include is interpreted is completely unrelated. |
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226 | That's why we have to save it all. */ |
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227 | |||
228 | struct app_save |
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229 | { |
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230 | int state; |
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231 | int old_state; |
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232 | char * out_string; |
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233 | char out_buf[sizeof (out_buf)]; |
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234 | int add_newlines; |
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235 | char * saved_input; |
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236 | size_t saved_input_len; |
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237 | #ifdef TC_M68K |
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238 | int scrub_m68k_mri; |
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239 | #endif |
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240 | const char * mri_state; |
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241 | char mri_last_ch; |
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242 | #if defined TC_ARM && defined OBJ_ELF |
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243 | const char * symver_state; |
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244 | #endif |
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245 | }; |
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246 | |||
247 | char * |
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248 | app_push (void) |
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249 | { |
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6324 | serge | 250 | struct app_save *saved; |
5222 | serge | 251 | |
252 | saved = (struct app_save *) xmalloc (sizeof (*saved)); |
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253 | saved->state = state; |
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254 | saved->old_state = old_state; |
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255 | saved->out_string = out_string; |
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256 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); |
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257 | saved->add_newlines = add_newlines; |
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258 | if (saved_input == NULL) |
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259 | saved->saved_input = NULL; |
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260 | else |
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261 | { |
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262 | saved->saved_input = (char *) xmalloc (saved_input_len); |
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263 | memcpy (saved->saved_input, saved_input, saved_input_len); |
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264 | saved->saved_input_len = saved_input_len; |
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265 | } |
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266 | #ifdef TC_M68K |
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267 | saved->scrub_m68k_mri = scrub_m68k_mri; |
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268 | #endif |
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269 | saved->mri_state = mri_state; |
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270 | saved->mri_last_ch = mri_last_ch; |
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271 | #if defined TC_ARM && defined OBJ_ELF |
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272 | saved->symver_state = symver_state; |
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273 | #endif |
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274 | |||
275 | /* do_scrub_begin() is not useful, just wastes time. */ |
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276 | |||
277 | state = 0; |
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278 | saved_input = NULL; |
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279 | add_newlines = 0; |
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280 | |||
281 | return (char *) saved; |
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282 | } |
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283 | |||
284 | void |
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285 | app_pop (char *arg) |
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286 | { |
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6324 | serge | 287 | struct app_save *saved = (struct app_save *) arg; |
5222 | serge | 288 | |
289 | /* There is no do_scrub_end (). */ |
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290 | state = saved->state; |
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291 | old_state = saved->old_state; |
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292 | out_string = saved->out_string; |
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293 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); |
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294 | add_newlines = saved->add_newlines; |
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295 | if (saved->saved_input == NULL) |
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296 | saved_input = NULL; |
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297 | else |
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298 | { |
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299 | gas_assert (saved->saved_input_len <= sizeof (input_buffer)); |
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300 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
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301 | saved_input = input_buffer; |
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302 | saved_input_len = saved->saved_input_len; |
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303 | free (saved->saved_input); |
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304 | } |
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305 | #ifdef TC_M68K |
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306 | scrub_m68k_mri = saved->scrub_m68k_mri; |
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307 | #endif |
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308 | mri_state = saved->mri_state; |
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309 | mri_last_ch = saved->mri_last_ch; |
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310 | #if defined TC_ARM && defined OBJ_ELF |
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311 | symver_state = saved->symver_state; |
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312 | #endif |
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313 | |||
314 | free (arg); |
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315 | } |
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316 | |||
317 | /* @@ This assumes that \n &c are the same on host and target. This is not |
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318 | necessarily true. */ |
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319 | |||
320 | static int |
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321 | process_escape (int ch) |
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322 | { |
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323 | switch (ch) |
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324 | { |
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325 | case 'b': |
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326 | return '\b'; |
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327 | case 'f': |
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328 | return '\f'; |
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329 | case 'n': |
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330 | return '\n'; |
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331 | case 'r': |
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332 | return '\r'; |
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333 | case 't': |
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334 | return '\t'; |
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335 | case '\'': |
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336 | return '\''; |
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337 | case '"': |
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338 | return '\"'; |
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339 | default: |
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340 | return ch; |
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341 | } |
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342 | } |
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343 | |||
344 | /* This function is called to process input characters. The GET |
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345 | parameter is used to retrieve more input characters. GET should |
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346 | set its parameter to point to a buffer, and return the length of |
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347 | the buffer; it should return 0 at end of file. The scrubbed output |
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348 | characters are put into the buffer starting at TOSTART; the TOSTART |
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349 | buffer is TOLEN bytes in length. The function returns the number |
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350 | of scrubbed characters put into TOSTART. This will be TOLEN unless |
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351 | end of file was seen. This function is arranged as a state |
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352 | machine, and saves its state so that it may return at any point. |
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353 | This is the way the old code used to work. */ |
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354 | |||
355 | size_t |
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356 | do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) |
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357 | { |
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358 | char *to = tostart; |
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359 | char *toend = tostart + tolen; |
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360 | char *from; |
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361 | char *fromend; |
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362 | size_t fromlen; |
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6324 | serge | 363 | int ch, ch2 = 0; |
5222 | serge | 364 | /* Character that started the string we're working on. */ |
365 | static char quotechar; |
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366 | |||
367 | /*State 0: beginning of normal line |
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368 | 1: After first whitespace on line (flush more white) |
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369 | 2: After first non-white (opcode) on line (keep 1white) |
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370 | 3: after second white on line (into operands) (flush white) |
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371 | 4: after putting out a .linefile, put out digits |
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372 | 5: parsing a string, then go to old-state |
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373 | 6: putting out \ escape in a "d string. |
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374 | 7: no longer used |
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375 | 8: no longer used |
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376 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
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377 | 10: After seeing whitespace in state 9 (keep white before symchar) |
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378 | 11: After seeing a symbol character in state 0 (eg a label definition) |
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379 | -1: output string in out_string and go to the state in old_state |
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380 | -2: flush text until a '*' '/' is seen, then go to state old_state |
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381 | #ifdef TC_V850 |
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382 | 12: After seeing a dash, looking for a second dash as a start |
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383 | of comment. |
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384 | #endif |
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385 | #ifdef DOUBLEBAR_PARALLEL |
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386 | 13: After seeing a vertical bar, looking for a second |
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387 | vertical bar as a parallel expression separator. |
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388 | #endif |
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389 | #ifdef TC_PREDICATE_START_CHAR |
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390 | 14: After seeing a predicate start character at state 0, looking |
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391 | for a predicate end character as predicate. |
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392 | 15: After seeing a predicate start character at state 1, looking |
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393 | for a predicate end character as predicate. |
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394 | #endif |
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395 | #ifdef TC_Z80 |
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396 | 16: After seeing an 'a' or an 'A' at the start of a symbol |
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397 | 17: After seeing an 'f' or an 'F' in state 16 |
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398 | #endif |
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399 | */ |
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400 | |||
401 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses |
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402 | constructs like ``.loc 1 20''. This was turning into ``.loc |
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403 | 120''. States 9 and 10 ensure that a space is never dropped in |
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404 | between characters which could appear in an identifier. Ian |
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405 | Taylor, ian@cygnus.com. |
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406 | |||
407 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works |
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408 | correctly on the PA (and any other target where colons are optional). |
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409 | Jeff Law, law@cs.utah.edu. |
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410 | |||
411 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not |
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412 | get squashed into "cmp r1,r2||trap#1", with the all important space |
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413 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ |
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414 | |||
415 | /* This macro gets the next input character. */ |
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416 | |||
417 | #define GET() \ |
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418 | (from < fromend \ |
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419 | ? * (unsigned char *) (from++) \ |
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420 | : (saved_input = NULL, \ |
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421 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ |
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422 | from = input_buffer, \ |
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423 | fromend = from + fromlen, \ |
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424 | (fromlen == 0 \ |
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425 | ? EOF \ |
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426 | : * (unsigned char *) (from++)))) |
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427 | |||
428 | /* This macro pushes a character back on the input stream. */ |
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429 | |||
430 | #define UNGET(uch) (*--from = (uch)) |
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431 | |||
432 | /* This macro puts a character into the output buffer. If this |
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433 | character fills the output buffer, this macro jumps to the label |
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434 | TOFULL. We use this rather ugly approach because we need to |
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435 | handle two different termination conditions: EOF on the input |
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436 | stream, and a full output buffer. It would be simpler if we |
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437 | always read in the entire input stream before processing it, but |
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438 | I don't want to make such a significant change to the assembler's |
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439 | memory usage. */ |
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440 | |||
441 | #define PUT(pch) \ |
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442 | do \ |
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443 | { \ |
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444 | *to++ = (pch); \ |
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445 | if (to >= toend) \ |
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446 | goto tofull; \ |
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447 | } \ |
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448 | while (0) |
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449 | |||
450 | if (saved_input != NULL) |
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451 | { |
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452 | from = saved_input; |
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453 | fromend = from + saved_input_len; |
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454 | } |
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455 | else |
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456 | { |
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457 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
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458 | if (fromlen == 0) |
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459 | return 0; |
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460 | from = input_buffer; |
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461 | fromend = from + fromlen; |
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462 | } |
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463 | |||
464 | while (1) |
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465 | { |
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466 | /* The cases in this switch end with continue, in order to |
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467 | branch back to the top of this while loop and generate the |
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468 | next output character in the appropriate state. */ |
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469 | switch (state) |
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470 | { |
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471 | case -1: |
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472 | ch = *out_string++; |
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473 | if (*out_string == '\0') |
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474 | { |
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475 | state = old_state; |
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476 | old_state = 3; |
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477 | } |
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478 | PUT (ch); |
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479 | continue; |
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480 | |||
481 | case -2: |
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482 | for (;;) |
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483 | { |
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484 | do |
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485 | { |
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486 | ch = GET (); |
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487 | |||
488 | if (ch == EOF) |
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489 | { |
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490 | as_warn (_("end of file in comment")); |
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491 | goto fromeof; |
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492 | } |
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493 | |||
494 | if (ch == '\n') |
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495 | PUT ('\n'); |
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496 | } |
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497 | while (ch != '*'); |
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498 | |||
499 | while ((ch = GET ()) == '*') |
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500 | ; |
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501 | |||
502 | if (ch == EOF) |
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503 | { |
||
504 | as_warn (_("end of file in comment")); |
||
505 | goto fromeof; |
||
506 | } |
||
507 | |||
508 | if (ch == '/') |
||
509 | break; |
||
510 | |||
511 | UNGET (ch); |
||
512 | } |
||
513 | |||
514 | state = old_state; |
||
515 | UNGET (' '); |
||
516 | continue; |
||
517 | |||
518 | case 4: |
||
519 | ch = GET (); |
||
520 | if (ch == EOF) |
||
521 | goto fromeof; |
||
522 | else if (ch >= '0' && ch <= '9') |
||
523 | PUT (ch); |
||
524 | else |
||
525 | { |
||
526 | while (ch != EOF && IS_WHITESPACE (ch)) |
||
527 | ch = GET (); |
||
528 | if (ch == '"') |
||
529 | { |
||
530 | quotechar = ch; |
||
531 | state = 5; |
||
532 | old_state = 3; |
||
533 | PUT (ch); |
||
534 | } |
||
535 | else |
||
536 | { |
||
537 | while (ch != EOF && ch != '\n') |
||
538 | ch = GET (); |
||
539 | state = 0; |
||
540 | PUT (ch); |
||
541 | } |
||
542 | } |
||
543 | continue; |
||
544 | |||
545 | case 5: |
||
546 | /* We are going to copy everything up to a quote character, |
||
547 | with special handling for a backslash. We try to |
||
548 | optimize the copying in the simple case without using the |
||
549 | GET and PUT macros. */ |
||
550 | { |
||
551 | char *s; |
||
552 | ptrdiff_t len; |
||
553 | |||
554 | for (s = from; s < fromend; s++) |
||
555 | { |
||
556 | ch = *s; |
||
557 | if (ch == '\\' |
||
558 | || ch == quotechar |
||
559 | || ch == '\n') |
||
560 | break; |
||
561 | } |
||
562 | len = s - from; |
||
563 | if (len > toend - to) |
||
564 | len = toend - to; |
||
565 | if (len > 0) |
||
566 | { |
||
567 | memcpy (to, from, len); |
||
568 | to += len; |
||
569 | from += len; |
||
570 | if (to >= toend) |
||
571 | goto tofull; |
||
572 | } |
||
573 | } |
||
574 | |||
575 | ch = GET (); |
||
576 | if (ch == EOF) |
||
577 | { |
||
578 | /* This buffer is here specifically so |
||
579 | that the UNGET below will work. */ |
||
580 | static char one_char_buf[1]; |
||
581 | |||
582 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
||
583 | state = old_state; |
||
584 | from = fromend = one_char_buf + 1; |
||
585 | fromlen = 1; |
||
586 | UNGET ('\n'); |
||
587 | PUT (quotechar); |
||
588 | } |
||
589 | else if (ch == quotechar) |
||
590 | { |
||
591 | state = old_state; |
||
592 | PUT (ch); |
||
593 | } |
||
594 | #ifndef NO_STRING_ESCAPES |
||
595 | else if (ch == '\\') |
||
596 | { |
||
597 | state = 6; |
||
598 | PUT (ch); |
||
599 | } |
||
600 | #endif |
||
601 | else if (scrub_m68k_mri && ch == '\n') |
||
602 | { |
||
603 | /* Just quietly terminate the string. This permits lines like |
||
604 | bne label loop if we haven't reach end yet. */ |
||
605 | state = old_state; |
||
606 | UNGET (ch); |
||
607 | PUT ('\''); |
||
608 | } |
||
609 | else |
||
610 | { |
||
611 | PUT (ch); |
||
612 | } |
||
613 | continue; |
||
614 | |||
615 | case 6: |
||
616 | state = 5; |
||
617 | ch = GET (); |
||
618 | switch (ch) |
||
619 | { |
||
620 | /* Handle strings broken across lines, by turning '\n' into |
||
621 | '\\' and 'n'. */ |
||
622 | case '\n': |
||
623 | UNGET ('n'); |
||
624 | add_newlines++; |
||
625 | PUT ('\\'); |
||
626 | continue; |
||
627 | |||
628 | case EOF: |
||
629 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
||
630 | PUT (quotechar); |
||
631 | continue; |
||
632 | |||
633 | case '"': |
||
634 | case '\\': |
||
635 | case 'b': |
||
636 | case 'f': |
||
637 | case 'n': |
||
638 | case 'r': |
||
639 | case 't': |
||
640 | case 'v': |
||
641 | case 'x': |
||
642 | case 'X': |
||
643 | case '0': |
||
644 | case '1': |
||
645 | case '2': |
||
646 | case '3': |
||
647 | case '4': |
||
648 | case '5': |
||
649 | case '6': |
||
650 | case '7': |
||
651 | break; |
||
652 | |||
653 | default: |
||
654 | #ifdef ONLY_STANDARD_ESCAPES |
||
655 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
||
656 | #endif |
||
657 | break; |
||
658 | } |
||
659 | PUT (ch); |
||
660 | continue; |
||
661 | |||
662 | #ifdef DOUBLEBAR_PARALLEL |
||
663 | case 13: |
||
664 | ch = GET (); |
||
665 | if (ch != '|') |
||
666 | abort (); |
||
667 | |||
668 | /* Reset back to state 1 and pretend that we are parsing a |
||
669 | line from just after the first white space. */ |
||
670 | state = 1; |
||
671 | PUT ('|'); |
||
672 | #ifdef TC_TIC6X |
||
673 | /* "||^" is used for SPMASKed instructions. */ |
||
674 | ch = GET (); |
||
675 | if (ch == EOF) |
||
676 | goto fromeof; |
||
677 | else if (ch == '^') |
||
678 | PUT ('^'); |
||
679 | else |
||
680 | UNGET (ch); |
||
681 | #endif |
||
682 | continue; |
||
683 | #endif |
||
684 | #ifdef TC_Z80 |
||
685 | case 16: |
||
686 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ |
||
687 | ch = GET (); |
||
688 | if (ch == 'f' || ch == 'F') |
||
689 | { |
||
690 | state = 17; |
||
691 | PUT (ch); |
||
692 | } |
||
693 | else |
||
694 | { |
||
695 | state = 9; |
||
696 | break; |
||
697 | } |
||
698 | case 17: |
||
699 | /* We have seen "af" at the start of a symbol, |
||
700 | a ' here is a part of that symbol. */ |
||
701 | ch = GET (); |
||
702 | state = 9; |
||
703 | if (ch == '\'') |
||
704 | /* Change to avoid warning about unclosed string. */ |
||
705 | PUT ('`'); |
||
706 | else if (ch != EOF) |
||
707 | UNGET (ch); |
||
708 | break; |
||
709 | #endif |
||
710 | } |
||
711 | |||
712 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
||
713 | |||
714 | /* flushchar: */ |
||
715 | ch = GET (); |
||
716 | |||
717 | #ifdef TC_PREDICATE_START_CHAR |
||
718 | if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) |
||
719 | { |
||
720 | state += 14; |
||
721 | PUT (ch); |
||
722 | continue; |
||
723 | } |
||
724 | else if (state == 14 || state == 15) |
||
725 | { |
||
726 | if (ch == TC_PREDICATE_END_CHAR) |
||
727 | { |
||
728 | state -= 14; |
||
729 | PUT (ch); |
||
730 | ch = GET (); |
||
731 | } |
||
732 | else |
||
733 | { |
||
734 | PUT (ch); |
||
735 | continue; |
||
736 | } |
||
737 | } |
||
738 | #endif |
||
739 | |||
740 | recycle: |
||
741 | |||
742 | #if defined TC_ARM && defined OBJ_ELF |
||
743 | /* We need to watch out for .symver directives. See the comment later |
||
744 | in this function. */ |
||
745 | if (symver_state == NULL) |
||
746 | { |
||
747 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) |
||
748 | symver_state = symver_pseudo + 1; |
||
749 | } |
||
750 | else |
||
751 | { |
||
752 | /* We advance to the next state if we find the right |
||
753 | character. */ |
||
754 | if (ch != '\0' && (*symver_state == ch)) |
||
755 | ++symver_state; |
||
756 | else if (*symver_state != '\0') |
||
757 | /* We did not get the expected character, or we didn't |
||
758 | get a valid terminating character after seeing the |
||
759 | entire pseudo-op, so we must go back to the beginning. */ |
||
760 | symver_state = NULL; |
||
761 | else |
||
762 | { |
||
763 | /* We've read the entire pseudo-op. If this is the end |
||
764 | of the line, go back to the beginning. */ |
||
765 | if (IS_NEWLINE (ch)) |
||
766 | symver_state = NULL; |
||
767 | } |
||
768 | } |
||
769 | #endif /* TC_ARM && OBJ_ELF */ |
||
770 | |||
771 | #ifdef TC_M68K |
||
772 | /* We want to have pseudo-ops which control whether we are in |
||
773 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
||
774 | the scrubber, that means that we need a special purpose |
||
775 | recognizer here. */ |
||
776 | if (mri_state == NULL) |
||
777 | { |
||
778 | if ((state == 0 || state == 1) |
||
779 | && ch == mri_pseudo[0]) |
||
780 | mri_state = mri_pseudo + 1; |
||
781 | } |
||
782 | else |
||
783 | { |
||
784 | /* We advance to the next state if we find the right |
||
785 | character, or if we need a space character and we get any |
||
786 | whitespace character, or if we need a '0' and we get a |
||
787 | '1' (this is so that we only need one state to handle |
||
788 | ``.mri 0'' and ``.mri 1''). */ |
||
789 | if (ch != '\0' |
||
790 | && (*mri_state == ch |
||
791 | || (*mri_state == ' ' |
||
792 | && lex[ch] == LEX_IS_WHITESPACE) |
||
793 | || (*mri_state == '0' |
||
794 | && ch == '1'))) |
||
795 | { |
||
796 | mri_last_ch = ch; |
||
797 | ++mri_state; |
||
798 | } |
||
799 | else if (*mri_state != '\0' |
||
800 | || (lex[ch] != LEX_IS_WHITESPACE |
||
801 | && lex[ch] != LEX_IS_NEWLINE)) |
||
802 | { |
||
803 | /* We did not get the expected character, or we didn't |
||
804 | get a valid terminating character after seeing the |
||
805 | entire pseudo-op, so we must go back to the |
||
806 | beginning. */ |
||
807 | mri_state = NULL; |
||
808 | } |
||
809 | else |
||
810 | { |
||
811 | /* We've read the entire pseudo-op. mips_last_ch is |
||
812 | either '0' or '1' indicating whether to enter or |
||
813 | leave MRI mode. */ |
||
814 | do_scrub_begin (mri_last_ch == '1'); |
||
815 | mri_state = NULL; |
||
816 | |||
817 | /* We continue handling the character as usual. The |
||
818 | main gas reader must also handle the .mri pseudo-op |
||
819 | to control expression parsing and the like. */ |
||
820 | } |
||
821 | } |
||
822 | #endif |
||
823 | |||
824 | if (ch == EOF) |
||
825 | { |
||
826 | if (state != 0) |
||
827 | { |
||
828 | as_warn (_("end of file not at end of a line; newline inserted")); |
||
829 | state = 0; |
||
830 | PUT ('\n'); |
||
831 | } |
||
832 | goto fromeof; |
||
833 | } |
||
834 | |||
835 | switch (lex[ch]) |
||
836 | { |
||
837 | case LEX_IS_WHITESPACE: |
||
838 | do |
||
839 | { |
||
840 | ch = GET (); |
||
841 | } |
||
842 | while (ch != EOF && IS_WHITESPACE (ch)); |
||
843 | if (ch == EOF) |
||
844 | goto fromeof; |
||
845 | |||
846 | if (state == 0) |
||
847 | { |
||
848 | /* Preserve a single whitespace character at the |
||
849 | beginning of a line. */ |
||
850 | state = 1; |
||
851 | UNGET (ch); |
||
852 | PUT (' '); |
||
853 | break; |
||
854 | } |
||
855 | |||
856 | #ifdef KEEP_WHITE_AROUND_COLON |
||
857 | if (lex[ch] == LEX_IS_COLON) |
||
858 | { |
||
859 | /* Only keep this white if there's no white *after* the |
||
860 | colon. */ |
||
861 | ch2 = GET (); |
||
862 | if (ch2 != EOF) |
||
863 | UNGET (ch2); |
||
864 | if (!IS_WHITESPACE (ch2)) |
||
865 | { |
||
866 | state = 9; |
||
867 | UNGET (ch); |
||
868 | PUT (' '); |
||
869 | break; |
||
870 | } |
||
871 | } |
||
872 | #endif |
||
873 | if (IS_COMMENT (ch) |
||
874 | || ch == '/' |
||
875 | || IS_LINE_SEPARATOR (ch) |
||
876 | || IS_PARALLEL_SEPARATOR (ch)) |
||
877 | { |
||
878 | if (scrub_m68k_mri) |
||
879 | { |
||
880 | /* In MRI mode, we keep these spaces. */ |
||
881 | UNGET (ch); |
||
882 | PUT (' '); |
||
883 | break; |
||
884 | } |
||
885 | goto recycle; |
||
886 | } |
||
887 | |||
888 | /* If we're in state 2 or 11, we've seen a non-white |
||
889 | character followed by whitespace. If the next character |
||
890 | is ':', this is whitespace after a label name which we |
||
891 | normally must ignore. In MRI mode, though, spaces are |
||
892 | not permitted between the label and the colon. */ |
||
893 | if ((state == 2 || state == 11) |
||
894 | && lex[ch] == LEX_IS_COLON |
||
895 | && ! scrub_m68k_mri) |
||
896 | { |
||
897 | state = 1; |
||
898 | PUT (ch); |
||
899 | break; |
||
900 | } |
||
901 | |||
902 | switch (state) |
||
903 | { |
||
904 | case 1: |
||
905 | /* We can arrive here if we leave a leading whitespace |
||
906 | character at the beginning of a line. */ |
||
907 | goto recycle; |
||
908 | case 2: |
||
909 | state = 3; |
||
910 | if (to + 1 < toend) |
||
911 | { |
||
912 | /* Optimize common case by skipping UNGET/GET. */ |
||
913 | PUT (' '); /* Sp after opco */ |
||
914 | goto recycle; |
||
915 | } |
||
916 | UNGET (ch); |
||
917 | PUT (' '); |
||
918 | break; |
||
919 | case 3: |
||
920 | #ifndef TC_KEEP_OPERAND_SPACES |
||
921 | /* For TI C6X, we keep these spaces as they may separate |
||
922 | functional unit specifiers from operands. */ |
||
923 | if (scrub_m68k_mri) |
||
924 | #endif |
||
925 | { |
||
926 | /* In MRI mode, we keep these spaces. */ |
||
927 | UNGET (ch); |
||
928 | PUT (' '); |
||
929 | break; |
||
930 | } |
||
931 | goto recycle; /* Sp in operands */ |
||
932 | case 9: |
||
933 | case 10: |
||
934 | #ifndef TC_KEEP_OPERAND_SPACES |
||
935 | if (scrub_m68k_mri) |
||
936 | #endif |
||
937 | { |
||
938 | /* In MRI mode, we keep these spaces. */ |
||
939 | state = 3; |
||
940 | UNGET (ch); |
||
941 | PUT (' '); |
||
942 | break; |
||
943 | } |
||
944 | state = 10; /* Sp after symbol char */ |
||
945 | goto recycle; |
||
946 | case 11: |
||
947 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
||
948 | state = 1; |
||
949 | else |
||
950 | { |
||
951 | /* We know that ch is not ':', since we tested that |
||
952 | case above. Therefore this is not a label, so it |
||
953 | must be the opcode, and we've just seen the |
||
954 | whitespace after it. */ |
||
955 | state = 3; |
||
956 | } |
||
957 | UNGET (ch); |
||
958 | PUT (' '); /* Sp after label definition. */ |
||
959 | break; |
||
960 | default: |
||
961 | BAD_CASE (state); |
||
962 | } |
||
963 | break; |
||
964 | |||
965 | case LEX_IS_TWOCHAR_COMMENT_1ST: |
||
966 | ch2 = GET (); |
||
967 | if (ch2 == '*') |
||
968 | { |
||
969 | for (;;) |
||
970 | { |
||
971 | do |
||
972 | { |
||
973 | ch2 = GET (); |
||
974 | if (ch2 != EOF && IS_NEWLINE (ch2)) |
||
975 | add_newlines++; |
||
976 | } |
||
977 | while (ch2 != EOF && ch2 != '*'); |
||
978 | |||
979 | while (ch2 == '*') |
||
980 | ch2 = GET (); |
||
981 | |||
982 | if (ch2 == EOF || ch2 == '/') |
||
983 | break; |
||
984 | |||
985 | /* This UNGET will ensure that we count newlines |
||
986 | correctly. */ |
||
987 | UNGET (ch2); |
||
988 | } |
||
989 | |||
990 | if (ch2 == EOF) |
||
991 | as_warn (_("end of file in multiline comment")); |
||
992 | |||
993 | ch = ' '; |
||
994 | goto recycle; |
||
995 | } |
||
996 | #ifdef DOUBLESLASH_LINE_COMMENTS |
||
997 | else if (ch2 == '/') |
||
998 | { |
||
999 | do |
||
1000 | { |
||
1001 | ch = GET (); |
||
1002 | } |
||
1003 | while (ch != EOF && !IS_NEWLINE (ch)); |
||
1004 | if (ch == EOF) |
||
1005 | as_warn ("end of file in comment; newline inserted"); |
||
1006 | state = 0; |
||
1007 | PUT ('\n'); |
||
1008 | break; |
||
1009 | } |
||
1010 | #endif |
||
1011 | else |
||
1012 | { |
||
1013 | if (ch2 != EOF) |
||
1014 | UNGET (ch2); |
||
1015 | if (state == 9 || state == 10) |
||
1016 | state = 3; |
||
1017 | PUT (ch); |
||
1018 | } |
||
1019 | break; |
||
1020 | |||
1021 | case LEX_IS_STRINGQUOTE: |
||
1022 | quotechar = ch; |
||
1023 | if (state == 10) |
||
1024 | { |
||
1025 | /* Preserve the whitespace in foo "bar". */ |
||
1026 | UNGET (ch); |
||
1027 | state = 3; |
||
1028 | PUT (' '); |
||
1029 | |||
1030 | /* PUT didn't jump out. We could just break, but we |
||
1031 | know what will happen, so optimize a bit. */ |
||
1032 | ch = GET (); |
||
1033 | old_state = 3; |
||
1034 | } |
||
1035 | else if (state == 9) |
||
1036 | old_state = 3; |
||
1037 | else |
||
1038 | old_state = state; |
||
1039 | state = 5; |
||
1040 | PUT (ch); |
||
1041 | break; |
||
1042 | |||
1043 | #ifndef IEEE_STYLE |
||
1044 | case LEX_IS_ONECHAR_QUOTE: |
||
1045 | #ifdef H_TICK_HEX |
||
1046 | if (state == 9 && enable_h_tick_hex) |
||
1047 | { |
||
1048 | char c; |
||
1049 | |||
1050 | c = GET (); |
||
1051 | as_warn ("'%c found after symbol", c); |
||
1052 | UNGET (c); |
||
1053 | } |
||
1054 | #endif |
||
1055 | if (state == 10) |
||
1056 | { |
||
1057 | /* Preserve the whitespace in foo 'b'. */ |
||
1058 | UNGET (ch); |
||
1059 | state = 3; |
||
1060 | PUT (' '); |
||
1061 | break; |
||
1062 | } |
||
1063 | ch = GET (); |
||
1064 | if (ch == EOF) |
||
1065 | { |
||
1066 | as_warn (_("end of file after a one-character quote; \\0 inserted")); |
||
1067 | ch = 0; |
||
1068 | } |
||
1069 | if (ch == '\\') |
||
1070 | { |
||
1071 | ch = GET (); |
||
1072 | if (ch == EOF) |
||
1073 | { |
||
1074 | as_warn (_("end of file in escape character")); |
||
1075 | ch = '\\'; |
||
1076 | } |
||
1077 | else |
||
1078 | ch = process_escape (ch); |
||
1079 | } |
||
1080 | sprintf (out_buf, "%d", (int) (unsigned char) ch); |
||
1081 | |||
1082 | /* None of these 'x constants for us. We want 'x'. */ |
||
1083 | if ((ch = GET ()) != '\'') |
||
1084 | { |
||
1085 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE |
||
1086 | as_warn (_("missing close quote; (assumed)")); |
||
1087 | #else |
||
1088 | if (ch != EOF) |
||
1089 | UNGET (ch); |
||
1090 | #endif |
||
1091 | } |
||
1092 | if (strlen (out_buf) == 1) |
||
1093 | { |
||
1094 | PUT (out_buf[0]); |
||
1095 | break; |
||
1096 | } |
||
1097 | if (state == 9) |
||
1098 | old_state = 3; |
||
1099 | else |
||
1100 | old_state = state; |
||
1101 | state = -1; |
||
1102 | out_string = out_buf; |
||
1103 | PUT (*out_string++); |
||
1104 | break; |
||
1105 | #endif |
||
1106 | |||
1107 | case LEX_IS_COLON: |
||
1108 | #ifdef KEEP_WHITE_AROUND_COLON |
||
1109 | state = 9; |
||
1110 | #else |
||
1111 | if (state == 9 || state == 10) |
||
1112 | state = 3; |
||
1113 | else if (state != 3) |
||
1114 | state = 1; |
||
1115 | #endif |
||
1116 | PUT (ch); |
||
1117 | break; |
||
1118 | |||
1119 | case LEX_IS_NEWLINE: |
||
1120 | /* Roll out a bunch of newlines from inside comments, etc. */ |
||
1121 | if (add_newlines) |
||
1122 | { |
||
1123 | --add_newlines; |
||
1124 | UNGET (ch); |
||
1125 | } |
||
1126 | /* Fall through. */ |
||
1127 | |||
1128 | case LEX_IS_LINE_SEPARATOR: |
||
1129 | state = 0; |
||
1130 | PUT (ch); |
||
1131 | break; |
||
1132 | |||
1133 | case LEX_IS_PARALLEL_SEPARATOR: |
||
1134 | state = 1; |
||
1135 | PUT (ch); |
||
1136 | break; |
||
1137 | |||
1138 | #ifdef TC_V850 |
||
1139 | case LEX_IS_DOUBLEDASH_1ST: |
||
1140 | ch2 = GET (); |
||
1141 | if (ch2 != '-') |
||
1142 | { |
||
1143 | if (ch2 != EOF) |
||
1144 | UNGET (ch2); |
||
1145 | goto de_fault; |
||
1146 | } |
||
1147 | /* Read and skip to end of line. */ |
||
1148 | do |
||
1149 | { |
||
1150 | ch = GET (); |
||
1151 | } |
||
1152 | while (ch != EOF && ch != '\n'); |
||
1153 | |||
1154 | if (ch == EOF) |
||
1155 | as_warn (_("end of file in comment; newline inserted")); |
||
1156 | |||
1157 | state = 0; |
||
1158 | PUT ('\n'); |
||
1159 | break; |
||
1160 | #endif |
||
1161 | #ifdef DOUBLEBAR_PARALLEL |
||
1162 | case LEX_IS_DOUBLEBAR_1ST: |
||
1163 | ch2 = GET (); |
||
1164 | if (ch2 != EOF) |
||
1165 | UNGET (ch2); |
||
1166 | if (ch2 != '|') |
||
1167 | goto de_fault; |
||
1168 | |||
1169 | /* Handle '||' in two states as invoking PUT twice might |
||
1170 | result in the first one jumping out of this loop. We'd |
||
1171 | then lose track of the state and one '|' char. */ |
||
1172 | state = 13; |
||
1173 | PUT ('|'); |
||
1174 | break; |
||
1175 | #endif |
||
1176 | case LEX_IS_LINE_COMMENT_START: |
||
1177 | /* FIXME-someday: The two character comment stuff was badly |
||
1178 | thought out. On i386, we want '/' as line comment start |
||
1179 | AND we want C style comments. hence this hack. The |
||
1180 | whole lexical process should be reworked. xoxorich. */ |
||
1181 | if (ch == '/') |
||
1182 | { |
||
1183 | ch2 = GET (); |
||
1184 | if (ch2 == '*') |
||
1185 | { |
||
1186 | old_state = 3; |
||
1187 | state = -2; |
||
1188 | break; |
||
1189 | } |
||
1190 | else |
||
1191 | { |
||
1192 | UNGET (ch2); |
||
1193 | } |
||
1194 | } |
||
1195 | |||
1196 | if (state == 0 || state == 1) /* Only comment at start of line. */ |
||
1197 | { |
||
1198 | int startch; |
||
1199 | |||
1200 | startch = ch; |
||
1201 | |||
1202 | do |
||
1203 | { |
||
1204 | ch = GET (); |
||
1205 | } |
||
1206 | while (ch != EOF && IS_WHITESPACE (ch)); |
||
1207 | |||
1208 | if (ch == EOF) |
||
1209 | { |
||
1210 | as_warn (_("end of file in comment; newline inserted")); |
||
1211 | PUT ('\n'); |
||
1212 | break; |
||
1213 | } |
||
1214 | |||
1215 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
||
1216 | { |
||
1217 | /* Not a cpp line. */ |
||
1218 | while (ch != EOF && !IS_NEWLINE (ch)) |
||
1219 | ch = GET (); |
||
1220 | if (ch == EOF) |
||
6324 | serge | 1221 | { |
5222 | serge | 1222 | as_warn (_("end of file in comment; newline inserted")); |
6324 | serge | 1223 | PUT ('\n'); |
1224 | } |
||
1225 | else /* IS_NEWLINE (ch) */ |
||
1226 | { |
||
1227 | /* To process non-zero add_newlines. */ |
||
1228 | UNGET (ch); |
||
1229 | } |
||
5222 | serge | 1230 | state = 0; |
1231 | break; |
||
1232 | } |
||
1233 | /* Looks like `# 123 "filename"' from cpp. */ |
||
1234 | UNGET (ch); |
||
1235 | old_state = 4; |
||
1236 | state = -1; |
||
1237 | if (scrub_m68k_mri) |
||
1238 | out_string = "\tlinefile "; |
||
1239 | else |
||
1240 | out_string = "\t.linefile "; |
||
1241 | PUT (*out_string++); |
||
1242 | break; |
||
1243 | } |
||
1244 | |||
1245 | #ifdef TC_D10V |
||
1246 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. |
||
1247 | Trap is the only short insn that has a first operand that is |
||
1248 | neither register nor label. |
||
1249 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . |
||
1250 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
||
1251 | already LEX_IS_LINE_COMMENT_START. However, it is the |
||
1252 | only character in line_comment_chars for d10v, hence we |
||
1253 | can recognize it as such. */ |
||
1254 | /* An alternative approach would be to reset the state to 1 when |
||
1255 | we see '||', '<'- or '->', but that seems to be overkill. */ |
||
1256 | if (state == 10) |
||
1257 | PUT (' '); |
||
1258 | #endif |
||
1259 | /* We have a line comment character which is not at the |
||
1260 | start of a line. If this is also a normal comment |
||
1261 | character, fall through. Otherwise treat it as a default |
||
1262 | character. */ |
||
1263 | if (strchr (tc_comment_chars, ch) == NULL |
||
1264 | && (! scrub_m68k_mri |
||
1265 | || (ch != '!' && ch != '*'))) |
||
1266 | goto de_fault; |
||
1267 | if (scrub_m68k_mri |
||
1268 | && (ch == '!' || ch == '*' || ch == '#') |
||
1269 | && state != 1 |
||
1270 | && state != 10) |
||
1271 | goto de_fault; |
||
1272 | /* Fall through. */ |
||
1273 | case LEX_IS_COMMENT_START: |
||
1274 | #if defined TC_ARM && defined OBJ_ELF |
||
1275 | /* On the ARM, `@' is the comment character. |
||
1276 | Unfortunately this is also a special character in ELF .symver |
||
1277 | directives (and .type, though we deal with those another way). |
||
1278 | So we check if this line is such a directive, and treat |
||
1279 | the character as default if so. This is a hack. */ |
||
1280 | if ((symver_state != NULL) && (*symver_state == 0)) |
||
1281 | goto de_fault; |
||
1282 | #endif |
||
1283 | |||
1284 | #ifdef TC_ARM |
||
1285 | /* For the ARM, care is needed not to damage occurrences of \@ |
||
1286 | by stripping the @ onwards. Yuck. */ |
||
1287 | if (to > tostart && *(to - 1) == '\\') |
||
1288 | /* Do not treat the @ as a start-of-comment. */ |
||
1289 | goto de_fault; |
||
1290 | #endif |
||
1291 | |||
1292 | #ifdef WARN_COMMENTS |
||
1293 | if (!found_comment) |
||
1294 | as_where (&found_comment_file, &found_comment); |
||
1295 | #endif |
||
1296 | do |
||
1297 | { |
||
1298 | ch = GET (); |
||
1299 | } |
||
1300 | while (ch != EOF && !IS_NEWLINE (ch)); |
||
1301 | if (ch == EOF) |
||
1302 | as_warn (_("end of file in comment; newline inserted")); |
||
1303 | state = 0; |
||
1304 | PUT ('\n'); |
||
1305 | break; |
||
1306 | |||
1307 | #ifdef H_TICK_HEX |
||
1308 | case LEX_IS_H: |
||
1309 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace |
||
1310 | the H' with 0x to make them gas-style hex characters. */ |
||
1311 | if (enable_h_tick_hex) |
||
1312 | { |
||
1313 | char quot; |
||
1314 | |||
1315 | quot = GET (); |
||
1316 | if (quot == '\'') |
||
1317 | { |
||
1318 | UNGET ('x'); |
||
1319 | ch = '0'; |
||
1320 | } |
||
1321 | else |
||
1322 | UNGET (quot); |
||
1323 | } |
||
1324 | /* FALL THROUGH */ |
||
1325 | #endif |
||
1326 | |||
1327 | case LEX_IS_SYMBOL_COMPONENT: |
||
1328 | if (state == 10) |
||
1329 | { |
||
1330 | /* This is a symbol character following another symbol |
||
1331 | character, with whitespace in between. We skipped |
||
1332 | the whitespace earlier, so output it now. */ |
||
1333 | UNGET (ch); |
||
1334 | state = 3; |
||
1335 | PUT (' '); |
||
1336 | break; |
||
1337 | } |
||
1338 | |||
1339 | #ifdef TC_Z80 |
||
1340 | /* "af'" is a symbol containing '\''. */ |
||
1341 | if (state == 3 && (ch == 'a' || ch == 'A')) |
||
1342 | { |
||
1343 | state = 16; |
||
1344 | PUT (ch); |
||
1345 | ch = GET (); |
||
1346 | if (ch == 'f' || ch == 'F') |
||
1347 | { |
||
1348 | state = 17; |
||
1349 | PUT (ch); |
||
1350 | break; |
||
1351 | } |
||
1352 | else |
||
1353 | { |
||
1354 | state = 9; |
||
1355 | if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) |
||
1356 | { |
||
1357 | if (ch != EOF) |
||
1358 | UNGET (ch); |
||
1359 | break; |
||
1360 | } |
||
1361 | } |
||
1362 | } |
||
1363 | #endif |
||
1364 | if (state == 3) |
||
1365 | state = 9; |
||
1366 | |||
1367 | /* This is a common case. Quickly copy CH and all the |
||
1368 | following symbol component or normal characters. */ |
||
1369 | if (to + 1 < toend |
||
1370 | && mri_state == NULL |
||
1371 | #if defined TC_ARM && defined OBJ_ELF |
||
1372 | && symver_state == NULL |
||
1373 | #endif |
||
1374 | ) |
||
1375 | { |
||
1376 | char *s; |
||
1377 | ptrdiff_t len; |
||
1378 | |||
1379 | for (s = from; s < fromend; s++) |
||
1380 | { |
||
1381 | int type; |
||
1382 | |||
1383 | ch2 = *(unsigned char *) s; |
||
1384 | type = lex[ch2]; |
||
1385 | if (type != 0 |
||
1386 | && type != LEX_IS_SYMBOL_COMPONENT) |
||
1387 | break; |
||
1388 | } |
||
1389 | |||
1390 | if (s > from) |
||
1391 | /* Handle the last character normally, for |
||
1392 | simplicity. */ |
||
1393 | --s; |
||
1394 | |||
1395 | len = s - from; |
||
1396 | |||
1397 | if (len > (toend - to) - 1) |
||
1398 | len = (toend - to) - 1; |
||
1399 | |||
1400 | if (len > 0) |
||
1401 | { |
||
1402 | PUT (ch); |
||
1403 | memcpy (to, from, len); |
||
1404 | to += len; |
||
1405 | from += len; |
||
1406 | if (to >= toend) |
||
1407 | goto tofull; |
||
1408 | ch = GET (); |
||
1409 | } |
||
1410 | } |
||
1411 | |||
1412 | /* Fall through. */ |
||
1413 | default: |
||
1414 | de_fault: |
||
1415 | /* Some relatively `normal' character. */ |
||
1416 | if (state == 0) |
||
1417 | { |
||
1418 | state = 11; /* Now seeing label definition. */ |
||
1419 | } |
||
1420 | else if (state == 1) |
||
1421 | { |
||
1422 | state = 2; /* Ditto. */ |
||
1423 | } |
||
1424 | else if (state == 9) |
||
1425 | { |
||
1426 | if (!IS_SYMBOL_COMPONENT (ch)) |
||
1427 | state = 3; |
||
1428 | } |
||
1429 | else if (state == 10) |
||
1430 | { |
||
1431 | if (ch == '\\') |
||
1432 | { |
||
1433 | /* Special handling for backslash: a backslash may |
||
1434 | be the beginning of a formal parameter (of a |
||
1435 | macro) following another symbol character, with |
||
1436 | whitespace in between. If that is the case, we |
||
1437 | output a space before the parameter. Strictly |
||
1438 | speaking, correct handling depends upon what the |
||
1439 | macro parameter expands into; if the parameter |
||
1440 | expands into something which does not start with |
||
1441 | an operand character, then we don't want to keep |
||
1442 | the space. We don't have enough information to |
||
1443 | make the right choice, so here we are making the |
||
1444 | choice which is more likely to be correct. */ |
||
1445 | if (to + 1 >= toend) |
||
1446 | { |
||
1447 | /* If we're near the end of the buffer, save the |
||
1448 | character for the next time round. Otherwise |
||
1449 | we'll lose our state. */ |
||
1450 | UNGET (ch); |
||
1451 | goto tofull; |
||
1452 | } |
||
1453 | *to++ = ' '; |
||
1454 | } |
||
1455 | |||
1456 | state = 3; |
||
1457 | } |
||
1458 | PUT (ch); |
||
1459 | break; |
||
1460 | } |
||
1461 | } |
||
1462 | |||
1463 | /*NOTREACHED*/ |
||
1464 | |||
1465 | fromeof: |
||
1466 | /* We have reached the end of the input. */ |
||
1467 | return to - tostart; |
||
1468 | |||
1469 | tofull: |
||
1470 | /* The output buffer is full. Save any input we have not yet |
||
1471 | processed. */ |
||
1472 | if (fromend > from) |
||
1473 | { |
||
1474 | saved_input = from; |
||
1475 | saved_input_len = fromend - from; |
||
1476 | } |
||
1477 | else |
||
1478 | saved_input = NULL; |
||
1479 | |||
1480 | return to - tostart; |
||
1481 | }>>'->>>>=>>=>-".>> |