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5222 | serge | 1 | /* This is the Assembler Pre-Processor |
2 | Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
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3 | 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2012 |
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4 | Free Software Foundation, Inc. |
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5 | |||
6 | This file is part of GAS, the GNU Assembler. |
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7 | |||
8 | GAS is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation; either version 3, or (at your option) |
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11 | any later version. |
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12 | |||
13 | GAS is distributed in the hope that it will be useful, but WITHOUT |
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14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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16 | License for more details. |
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17 | |||
18 | You should have received a copy of the GNU General Public License |
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19 | along with GAS; see the file COPYING. If not, write to the Free |
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20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
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21 | 02110-1301, USA. */ |
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22 | |||
23 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */ |
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24 | /* App, the assembler pre-processor. This pre-processor strips out |
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25 | excess spaces, turns single-quoted characters into a decimal |
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26 | constant, and turns the # in # |
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27 | .linefile. This needs better error-handling. */ |
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28 | |||
29 | #include "as.h" |
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30 | |||
31 | #if (__STDC__ != 1) |
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32 | #ifndef const |
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33 | #define const /* empty */ |
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34 | #endif |
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35 | #endif |
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36 | |||
37 | #ifdef H_TICK_HEX |
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38 | int enable_h_tick_hex = 0; |
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39 | #endif |
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40 | |||
41 | #ifdef TC_M68K |
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42 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
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43 | flag_m68k_mri, because the two flags will be affected by the .mri |
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44 | pseudo-op at different times. */ |
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45 | static int scrub_m68k_mri; |
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46 | |||
47 | /* The pseudo-op which switches in and out of MRI mode. See the |
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48 | comment in do_scrub_chars. */ |
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49 | static const char mri_pseudo[] = ".mri 0"; |
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50 | #else |
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51 | #define scrub_m68k_mri 0 |
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52 | #endif |
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53 | |||
54 | #if defined TC_ARM && defined OBJ_ELF |
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55 | /* The pseudo-op for which we need to special-case `@' characters. |
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56 | See the comment in do_scrub_chars. */ |
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57 | static const char symver_pseudo[] = ".symver"; |
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58 | static const char * symver_state; |
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59 | #endif |
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60 | |||
61 | static char lex[256]; |
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62 | static const char symbol_chars[] = |
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63 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
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64 | |||
65 | #define LEX_IS_SYMBOL_COMPONENT 1 |
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66 | #define LEX_IS_WHITESPACE 2 |
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67 | #define LEX_IS_LINE_SEPARATOR 3 |
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68 | #define LEX_IS_COMMENT_START 4 |
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69 | #define LEX_IS_LINE_COMMENT_START 5 |
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70 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 |
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71 | #define LEX_IS_STRINGQUOTE 8 |
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72 | #define LEX_IS_COLON 9 |
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73 | #define LEX_IS_NEWLINE 10 |
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74 | #define LEX_IS_ONECHAR_QUOTE 11 |
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75 | #ifdef TC_V850 |
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76 | #define LEX_IS_DOUBLEDASH_1ST 12 |
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77 | #endif |
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78 | #ifdef TC_M32R |
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79 | #define DOUBLEBAR_PARALLEL |
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80 | #endif |
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81 | #ifdef DOUBLEBAR_PARALLEL |
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82 | #define LEX_IS_DOUBLEBAR_1ST 13 |
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83 | #endif |
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84 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
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85 | #ifdef H_TICK_HEX |
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86 | #define LEX_IS_H 15 |
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87 | #endif |
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88 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
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89 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) |
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90 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) |
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91 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
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92 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
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93 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) |
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94 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) |
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95 | |||
96 | static int process_escape (int); |
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97 | |||
98 | /* FIXME-soon: The entire lexer/parser thingy should be |
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99 | built statically at compile time rather than dynamically |
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100 | each and every time the assembler is run. xoxorich. */ |
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101 | |||
102 | void |
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103 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
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104 | { |
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105 | const char *p; |
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106 | int c; |
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107 | |||
108 | lex[' '] = LEX_IS_WHITESPACE; |
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109 | lex['\t'] = LEX_IS_WHITESPACE; |
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110 | lex['\r'] = LEX_IS_WHITESPACE; |
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111 | lex['\n'] = LEX_IS_NEWLINE; |
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112 | lex[':'] = LEX_IS_COLON; |
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113 | |||
114 | #ifdef TC_M68K |
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115 | scrub_m68k_mri = m68k_mri; |
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116 | |||
117 | if (! m68k_mri) |
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118 | #endif |
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119 | { |
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120 | lex['"'] = LEX_IS_STRINGQUOTE; |
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121 | |||
122 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
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123 | /* I370 uses single-quotes to delimit integer, float constants. */ |
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124 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
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125 | #endif |
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126 | |||
127 | #ifdef SINGLE_QUOTE_STRINGS |
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128 | lex['\''] = LEX_IS_STRINGQUOTE; |
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129 | #endif |
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130 | } |
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131 | |||
132 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop |
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133 | in state 5 of do_scrub_chars must be changed. */ |
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134 | |||
135 | /* Note that these override the previous defaults, e.g. if ';' is a |
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136 | comment char, then it isn't a line separator. */ |
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137 | for (p = symbol_chars; *p; ++p) |
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138 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
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139 | |||
140 | for (c = 128; c < 256; ++c) |
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141 | lex[c] = LEX_IS_SYMBOL_COMPONENT; |
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142 | |||
143 | #ifdef tc_symbol_chars |
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144 | /* This macro permits the processor to specify all characters which |
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145 | may appears in an operand. This will prevent the scrubber from |
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146 | discarding meaningful whitespace in certain cases. The i386 |
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147 | backend uses this to support prefixes, which can confuse the |
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148 | scrubber as to whether it is parsing operands or opcodes. */ |
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149 | for (p = tc_symbol_chars; *p; ++p) |
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150 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
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151 | #endif |
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152 | |||
153 | /* The m68k backend wants to be able to change comment_chars. */ |
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154 | #ifndef tc_comment_chars |
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155 | #define tc_comment_chars comment_chars |
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156 | #endif |
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157 | for (p = tc_comment_chars; *p; p++) |
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158 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
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159 | |||
160 | for (p = line_comment_chars; *p; p++) |
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161 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
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162 | |||
163 | for (p = line_separator_chars; *p; p++) |
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164 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
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165 | |||
166 | #ifdef tc_parallel_separator_chars |
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167 | /* This macro permits the processor to specify all characters which |
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168 | separate parallel insns on the same line. */ |
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169 | for (p = tc_parallel_separator_chars; *p; p++) |
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170 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
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171 | #endif |
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172 | |||
173 | /* Only allow slash-star comments if slash is not in use. |
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174 | FIXME: This isn't right. We should always permit them. */ |
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175 | if (lex['/'] == 0) |
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176 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
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177 | |||
178 | #ifdef TC_M68K |
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179 | if (m68k_mri) |
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180 | { |
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181 | lex['\''] = LEX_IS_STRINGQUOTE; |
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182 | lex[';'] = LEX_IS_COMMENT_START; |
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183 | lex['*'] = LEX_IS_LINE_COMMENT_START; |
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184 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but |
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185 | then it can't be used in an expression. */ |
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186 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
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187 | } |
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188 | #endif |
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189 | |||
190 | #ifdef TC_V850 |
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191 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; |
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192 | #endif |
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193 | #ifdef DOUBLEBAR_PARALLEL |
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194 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
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195 | #endif |
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196 | #ifdef TC_D30V |
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197 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
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198 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
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199 | #endif |
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200 | |||
201 | #ifdef H_TICK_HEX |
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202 | if (enable_h_tick_hex) |
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203 | { |
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204 | lex['h'] = LEX_IS_H; |
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205 | lex['H'] = LEX_IS_H; |
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206 | } |
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207 | #endif |
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208 | } |
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209 | |||
210 | /* Saved state of the scrubber. */ |
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211 | static int state; |
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212 | static int old_state; |
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213 | static char *out_string; |
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214 | static char out_buf[20]; |
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215 | static int add_newlines; |
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216 | static char *saved_input; |
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217 | static size_t saved_input_len; |
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218 | static char input_buffer[32 * 1024]; |
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219 | static const char *mri_state; |
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220 | static char mri_last_ch; |
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221 | |||
222 | /* Data structure for saving the state of app across #include's. Note that |
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223 | app is called asynchronously to the parsing of the .include's, so our |
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224 | state at the time .include is interpreted is completely unrelated. |
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225 | That's why we have to save it all. */ |
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226 | |||
227 | struct app_save |
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228 | { |
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229 | int state; |
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230 | int old_state; |
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231 | char * out_string; |
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232 | char out_buf[sizeof (out_buf)]; |
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233 | int add_newlines; |
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234 | char * saved_input; |
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235 | size_t saved_input_len; |
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236 | #ifdef TC_M68K |
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237 | int scrub_m68k_mri; |
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238 | #endif |
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239 | const char * mri_state; |
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240 | char mri_last_ch; |
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241 | #if defined TC_ARM && defined OBJ_ELF |
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242 | const char * symver_state; |
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243 | #endif |
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244 | }; |
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245 | |||
246 | char * |
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247 | app_push (void) |
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248 | { |
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249 | register struct app_save *saved; |
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250 | |||
251 | saved = (struct app_save *) xmalloc (sizeof (*saved)); |
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252 | saved->state = state; |
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253 | saved->old_state = old_state; |
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254 | saved->out_string = out_string; |
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255 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); |
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256 | saved->add_newlines = add_newlines; |
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257 | if (saved_input == NULL) |
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258 | saved->saved_input = NULL; |
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259 | else |
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260 | { |
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261 | saved->saved_input = (char *) xmalloc (saved_input_len); |
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262 | memcpy (saved->saved_input, saved_input, saved_input_len); |
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263 | saved->saved_input_len = saved_input_len; |
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264 | } |
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265 | #ifdef TC_M68K |
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266 | saved->scrub_m68k_mri = scrub_m68k_mri; |
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267 | #endif |
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268 | saved->mri_state = mri_state; |
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269 | saved->mri_last_ch = mri_last_ch; |
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270 | #if defined TC_ARM && defined OBJ_ELF |
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271 | saved->symver_state = symver_state; |
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272 | #endif |
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273 | |||
274 | /* do_scrub_begin() is not useful, just wastes time. */ |
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275 | |||
276 | state = 0; |
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277 | saved_input = NULL; |
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278 | add_newlines = 0; |
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279 | |||
280 | return (char *) saved; |
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281 | } |
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282 | |||
283 | void |
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284 | app_pop (char *arg) |
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285 | { |
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286 | register struct app_save *saved = (struct app_save *) arg; |
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287 | |||
288 | /* There is no do_scrub_end (). */ |
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289 | state = saved->state; |
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290 | old_state = saved->old_state; |
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291 | out_string = saved->out_string; |
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292 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); |
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293 | add_newlines = saved->add_newlines; |
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294 | if (saved->saved_input == NULL) |
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295 | saved_input = NULL; |
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296 | else |
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297 | { |
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298 | gas_assert (saved->saved_input_len <= sizeof (input_buffer)); |
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299 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
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300 | saved_input = input_buffer; |
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301 | saved_input_len = saved->saved_input_len; |
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302 | free (saved->saved_input); |
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303 | } |
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304 | #ifdef TC_M68K |
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305 | scrub_m68k_mri = saved->scrub_m68k_mri; |
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306 | #endif |
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307 | mri_state = saved->mri_state; |
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308 | mri_last_ch = saved->mri_last_ch; |
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309 | #if defined TC_ARM && defined OBJ_ELF |
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310 | symver_state = saved->symver_state; |
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311 | #endif |
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312 | |||
313 | free (arg); |
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314 | } |
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315 | |||
316 | /* @@ This assumes that \n &c are the same on host and target. This is not |
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317 | necessarily true. */ |
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318 | |||
319 | static int |
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320 | process_escape (int ch) |
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321 | { |
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322 | switch (ch) |
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323 | { |
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324 | case 'b': |
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325 | return '\b'; |
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326 | case 'f': |
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327 | return '\f'; |
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328 | case 'n': |
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329 | return '\n'; |
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330 | case 'r': |
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331 | return '\r'; |
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332 | case 't': |
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333 | return '\t'; |
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334 | case '\'': |
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335 | return '\''; |
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336 | case '"': |
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337 | return '\"'; |
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338 | default: |
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339 | return ch; |
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340 | } |
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341 | } |
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342 | |||
343 | /* This function is called to process input characters. The GET |
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344 | parameter is used to retrieve more input characters. GET should |
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345 | set its parameter to point to a buffer, and return the length of |
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346 | the buffer; it should return 0 at end of file. The scrubbed output |
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347 | characters are put into the buffer starting at TOSTART; the TOSTART |
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348 | buffer is TOLEN bytes in length. The function returns the number |
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349 | of scrubbed characters put into TOSTART. This will be TOLEN unless |
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350 | end of file was seen. This function is arranged as a state |
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351 | machine, and saves its state so that it may return at any point. |
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352 | This is the way the old code used to work. */ |
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353 | |||
354 | size_t |
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355 | do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) |
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356 | { |
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357 | char *to = tostart; |
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358 | char *toend = tostart + tolen; |
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359 | char *from; |
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360 | char *fromend; |
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361 | size_t fromlen; |
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362 | register int ch, ch2 = 0; |
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363 | /* Character that started the string we're working on. */ |
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364 | static char quotechar; |
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365 | |||
366 | /*State 0: beginning of normal line |
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367 | 1: After first whitespace on line (flush more white) |
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368 | 2: After first non-white (opcode) on line (keep 1white) |
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369 | 3: after second white on line (into operands) (flush white) |
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370 | 4: after putting out a .linefile, put out digits |
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371 | 5: parsing a string, then go to old-state |
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372 | 6: putting out \ escape in a "d string. |
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373 | 7: no longer used |
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374 | 8: no longer used |
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375 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
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376 | 10: After seeing whitespace in state 9 (keep white before symchar) |
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377 | 11: After seeing a symbol character in state 0 (eg a label definition) |
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378 | -1: output string in out_string and go to the state in old_state |
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379 | -2: flush text until a '*' '/' is seen, then go to state old_state |
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380 | #ifdef TC_V850 |
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381 | 12: After seeing a dash, looking for a second dash as a start |
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382 | of comment. |
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383 | #endif |
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384 | #ifdef DOUBLEBAR_PARALLEL |
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385 | 13: After seeing a vertical bar, looking for a second |
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386 | vertical bar as a parallel expression separator. |
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387 | #endif |
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388 | #ifdef TC_PREDICATE_START_CHAR |
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389 | 14: After seeing a predicate start character at state 0, looking |
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390 | for a predicate end character as predicate. |
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391 | 15: After seeing a predicate start character at state 1, looking |
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392 | for a predicate end character as predicate. |
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393 | #endif |
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394 | #ifdef TC_Z80 |
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395 | 16: After seeing an 'a' or an 'A' at the start of a symbol |
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396 | 17: After seeing an 'f' or an 'F' in state 16 |
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397 | #endif |
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398 | */ |
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399 | |||
400 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses |
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401 | constructs like ``.loc 1 20''. This was turning into ``.loc |
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402 | 120''. States 9 and 10 ensure that a space is never dropped in |
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403 | between characters which could appear in an identifier. Ian |
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404 | Taylor, ian@cygnus.com. |
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405 | |||
406 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works |
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407 | correctly on the PA (and any other target where colons are optional). |
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408 | Jeff Law, law@cs.utah.edu. |
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409 | |||
410 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not |
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411 | get squashed into "cmp r1,r2||trap#1", with the all important space |
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412 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ |
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413 | |||
414 | /* This macro gets the next input character. */ |
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415 | |||
416 | #define GET() \ |
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417 | (from < fromend \ |
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418 | ? * (unsigned char *) (from++) \ |
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419 | : (saved_input = NULL, \ |
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420 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ |
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421 | from = input_buffer, \ |
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422 | fromend = from + fromlen, \ |
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423 | (fromlen == 0 \ |
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424 | ? EOF \ |
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425 | : * (unsigned char *) (from++)))) |
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426 | |||
427 | /* This macro pushes a character back on the input stream. */ |
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428 | |||
429 | #define UNGET(uch) (*--from = (uch)) |
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430 | |||
431 | /* This macro puts a character into the output buffer. If this |
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432 | character fills the output buffer, this macro jumps to the label |
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433 | TOFULL. We use this rather ugly approach because we need to |
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434 | handle two different termination conditions: EOF on the input |
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435 | stream, and a full output buffer. It would be simpler if we |
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436 | always read in the entire input stream before processing it, but |
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437 | I don't want to make such a significant change to the assembler's |
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438 | memory usage. */ |
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439 | |||
440 | #define PUT(pch) \ |
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441 | do \ |
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442 | { \ |
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443 | *to++ = (pch); \ |
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444 | if (to >= toend) \ |
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445 | goto tofull; \ |
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446 | } \ |
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447 | while (0) |
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448 | |||
449 | if (saved_input != NULL) |
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450 | { |
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451 | from = saved_input; |
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452 | fromend = from + saved_input_len; |
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453 | } |
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454 | else |
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455 | { |
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456 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
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457 | if (fromlen == 0) |
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458 | return 0; |
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459 | from = input_buffer; |
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460 | fromend = from + fromlen; |
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461 | } |
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462 | |||
463 | while (1) |
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464 | { |
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465 | /* The cases in this switch end with continue, in order to |
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466 | branch back to the top of this while loop and generate the |
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467 | next output character in the appropriate state. */ |
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468 | switch (state) |
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469 | { |
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470 | case -1: |
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471 | ch = *out_string++; |
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472 | if (*out_string == '\0') |
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473 | { |
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474 | state = old_state; |
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475 | old_state = 3; |
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476 | } |
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477 | PUT (ch); |
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478 | continue; |
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479 | |||
480 | case -2: |
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481 | for (;;) |
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482 | { |
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483 | do |
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484 | { |
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485 | ch = GET (); |
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486 | |||
487 | if (ch == EOF) |
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488 | { |
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489 | as_warn (_("end of file in comment")); |
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490 | goto fromeof; |
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491 | } |
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492 | |||
493 | if (ch == '\n') |
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494 | PUT ('\n'); |
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495 | } |
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496 | while (ch != '*'); |
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497 | |||
498 | while ((ch = GET ()) == '*') |
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499 | ; |
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500 | |||
501 | if (ch == EOF) |
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502 | { |
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503 | as_warn (_("end of file in comment")); |
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504 | goto fromeof; |
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505 | } |
||
506 | |||
507 | if (ch == '/') |
||
508 | break; |
||
509 | |||
510 | UNGET (ch); |
||
511 | } |
||
512 | |||
513 | state = old_state; |
||
514 | UNGET (' '); |
||
515 | continue; |
||
516 | |||
517 | case 4: |
||
518 | ch = GET (); |
||
519 | if (ch == EOF) |
||
520 | goto fromeof; |
||
521 | else if (ch >= '0' && ch <= '9') |
||
522 | PUT (ch); |
||
523 | else |
||
524 | { |
||
525 | while (ch != EOF && IS_WHITESPACE (ch)) |
||
526 | ch = GET (); |
||
527 | if (ch == '"') |
||
528 | { |
||
529 | quotechar = ch; |
||
530 | state = 5; |
||
531 | old_state = 3; |
||
532 | PUT (ch); |
||
533 | } |
||
534 | else |
||
535 | { |
||
536 | while (ch != EOF && ch != '\n') |
||
537 | ch = GET (); |
||
538 | state = 0; |
||
539 | PUT (ch); |
||
540 | } |
||
541 | } |
||
542 | continue; |
||
543 | |||
544 | case 5: |
||
545 | /* We are going to copy everything up to a quote character, |
||
546 | with special handling for a backslash. We try to |
||
547 | optimize the copying in the simple case without using the |
||
548 | GET and PUT macros. */ |
||
549 | { |
||
550 | char *s; |
||
551 | ptrdiff_t len; |
||
552 | |||
553 | for (s = from; s < fromend; s++) |
||
554 | { |
||
555 | ch = *s; |
||
556 | if (ch == '\\' |
||
557 | || ch == quotechar |
||
558 | || ch == '\n') |
||
559 | break; |
||
560 | } |
||
561 | len = s - from; |
||
562 | if (len > toend - to) |
||
563 | len = toend - to; |
||
564 | if (len > 0) |
||
565 | { |
||
566 | memcpy (to, from, len); |
||
567 | to += len; |
||
568 | from += len; |
||
569 | if (to >= toend) |
||
570 | goto tofull; |
||
571 | } |
||
572 | } |
||
573 | |||
574 | ch = GET (); |
||
575 | if (ch == EOF) |
||
576 | { |
||
577 | /* This buffer is here specifically so |
||
578 | that the UNGET below will work. */ |
||
579 | static char one_char_buf[1]; |
||
580 | |||
581 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
||
582 | state = old_state; |
||
583 | from = fromend = one_char_buf + 1; |
||
584 | fromlen = 1; |
||
585 | UNGET ('\n'); |
||
586 | PUT (quotechar); |
||
587 | } |
||
588 | else if (ch == quotechar) |
||
589 | { |
||
590 | state = old_state; |
||
591 | PUT (ch); |
||
592 | } |
||
593 | #ifndef NO_STRING_ESCAPES |
||
594 | else if (ch == '\\') |
||
595 | { |
||
596 | state = 6; |
||
597 | PUT (ch); |
||
598 | } |
||
599 | #endif |
||
600 | else if (scrub_m68k_mri && ch == '\n') |
||
601 | { |
||
602 | /* Just quietly terminate the string. This permits lines like |
||
603 | bne label loop if we haven't reach end yet. */ |
||
604 | state = old_state; |
||
605 | UNGET (ch); |
||
606 | PUT ('\''); |
||
607 | } |
||
608 | else |
||
609 | { |
||
610 | PUT (ch); |
||
611 | } |
||
612 | continue; |
||
613 | |||
614 | case 6: |
||
615 | state = 5; |
||
616 | ch = GET (); |
||
617 | switch (ch) |
||
618 | { |
||
619 | /* Handle strings broken across lines, by turning '\n' into |
||
620 | '\\' and 'n'. */ |
||
621 | case '\n': |
||
622 | UNGET ('n'); |
||
623 | add_newlines++; |
||
624 | PUT ('\\'); |
||
625 | continue; |
||
626 | |||
627 | case EOF: |
||
628 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
||
629 | PUT (quotechar); |
||
630 | continue; |
||
631 | |||
632 | case '"': |
||
633 | case '\\': |
||
634 | case 'b': |
||
635 | case 'f': |
||
636 | case 'n': |
||
637 | case 'r': |
||
638 | case 't': |
||
639 | case 'v': |
||
640 | case 'x': |
||
641 | case 'X': |
||
642 | case '0': |
||
643 | case '1': |
||
644 | case '2': |
||
645 | case '3': |
||
646 | case '4': |
||
647 | case '5': |
||
648 | case '6': |
||
649 | case '7': |
||
650 | break; |
||
651 | |||
652 | default: |
||
653 | #ifdef ONLY_STANDARD_ESCAPES |
||
654 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
||
655 | #endif |
||
656 | break; |
||
657 | } |
||
658 | PUT (ch); |
||
659 | continue; |
||
660 | |||
661 | #ifdef DOUBLEBAR_PARALLEL |
||
662 | case 13: |
||
663 | ch = GET (); |
||
664 | if (ch != '|') |
||
665 | abort (); |
||
666 | |||
667 | /* Reset back to state 1 and pretend that we are parsing a |
||
668 | line from just after the first white space. */ |
||
669 | state = 1; |
||
670 | PUT ('|'); |
||
671 | #ifdef TC_TIC6X |
||
672 | /* "||^" is used for SPMASKed instructions. */ |
||
673 | ch = GET (); |
||
674 | if (ch == EOF) |
||
675 | goto fromeof; |
||
676 | else if (ch == '^') |
||
677 | PUT ('^'); |
||
678 | else |
||
679 | UNGET (ch); |
||
680 | #endif |
||
681 | continue; |
||
682 | #endif |
||
683 | #ifdef TC_Z80 |
||
684 | case 16: |
||
685 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ |
||
686 | ch = GET (); |
||
687 | if (ch == 'f' || ch == 'F') |
||
688 | { |
||
689 | state = 17; |
||
690 | PUT (ch); |
||
691 | } |
||
692 | else |
||
693 | { |
||
694 | state = 9; |
||
695 | break; |
||
696 | } |
||
697 | case 17: |
||
698 | /* We have seen "af" at the start of a symbol, |
||
699 | a ' here is a part of that symbol. */ |
||
700 | ch = GET (); |
||
701 | state = 9; |
||
702 | if (ch == '\'') |
||
703 | /* Change to avoid warning about unclosed string. */ |
||
704 | PUT ('`'); |
||
705 | else if (ch != EOF) |
||
706 | UNGET (ch); |
||
707 | break; |
||
708 | #endif |
||
709 | } |
||
710 | |||
711 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
||
712 | |||
713 | /* flushchar: */ |
||
714 | ch = GET (); |
||
715 | |||
716 | #ifdef TC_PREDICATE_START_CHAR |
||
717 | if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) |
||
718 | { |
||
719 | state += 14; |
||
720 | PUT (ch); |
||
721 | continue; |
||
722 | } |
||
723 | else if (state == 14 || state == 15) |
||
724 | { |
||
725 | if (ch == TC_PREDICATE_END_CHAR) |
||
726 | { |
||
727 | state -= 14; |
||
728 | PUT (ch); |
||
729 | ch = GET (); |
||
730 | } |
||
731 | else |
||
732 | { |
||
733 | PUT (ch); |
||
734 | continue; |
||
735 | } |
||
736 | } |
||
737 | #endif |
||
738 | |||
739 | recycle: |
||
740 | |||
741 | #if defined TC_ARM && defined OBJ_ELF |
||
742 | /* We need to watch out for .symver directives. See the comment later |
||
743 | in this function. */ |
||
744 | if (symver_state == NULL) |
||
745 | { |
||
746 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) |
||
747 | symver_state = symver_pseudo + 1; |
||
748 | } |
||
749 | else |
||
750 | { |
||
751 | /* We advance to the next state if we find the right |
||
752 | character. */ |
||
753 | if (ch != '\0' && (*symver_state == ch)) |
||
754 | ++symver_state; |
||
755 | else if (*symver_state != '\0') |
||
756 | /* We did not get the expected character, or we didn't |
||
757 | get a valid terminating character after seeing the |
||
758 | entire pseudo-op, so we must go back to the beginning. */ |
||
759 | symver_state = NULL; |
||
760 | else |
||
761 | { |
||
762 | /* We've read the entire pseudo-op. If this is the end |
||
763 | of the line, go back to the beginning. */ |
||
764 | if (IS_NEWLINE (ch)) |
||
765 | symver_state = NULL; |
||
766 | } |
||
767 | } |
||
768 | #endif /* TC_ARM && OBJ_ELF */ |
||
769 | |||
770 | #ifdef TC_M68K |
||
771 | /* We want to have pseudo-ops which control whether we are in |
||
772 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
||
773 | the scrubber, that means that we need a special purpose |
||
774 | recognizer here. */ |
||
775 | if (mri_state == NULL) |
||
776 | { |
||
777 | if ((state == 0 || state == 1) |
||
778 | && ch == mri_pseudo[0]) |
||
779 | mri_state = mri_pseudo + 1; |
||
780 | } |
||
781 | else |
||
782 | { |
||
783 | /* We advance to the next state if we find the right |
||
784 | character, or if we need a space character and we get any |
||
785 | whitespace character, or if we need a '0' and we get a |
||
786 | '1' (this is so that we only need one state to handle |
||
787 | ``.mri 0'' and ``.mri 1''). */ |
||
788 | if (ch != '\0' |
||
789 | && (*mri_state == ch |
||
790 | || (*mri_state == ' ' |
||
791 | && lex[ch] == LEX_IS_WHITESPACE) |
||
792 | || (*mri_state == '0' |
||
793 | && ch == '1'))) |
||
794 | { |
||
795 | mri_last_ch = ch; |
||
796 | ++mri_state; |
||
797 | } |
||
798 | else if (*mri_state != '\0' |
||
799 | || (lex[ch] != LEX_IS_WHITESPACE |
||
800 | && lex[ch] != LEX_IS_NEWLINE)) |
||
801 | { |
||
802 | /* We did not get the expected character, or we didn't |
||
803 | get a valid terminating character after seeing the |
||
804 | entire pseudo-op, so we must go back to the |
||
805 | beginning. */ |
||
806 | mri_state = NULL; |
||
807 | } |
||
808 | else |
||
809 | { |
||
810 | /* We've read the entire pseudo-op. mips_last_ch is |
||
811 | either '0' or '1' indicating whether to enter or |
||
812 | leave MRI mode. */ |
||
813 | do_scrub_begin (mri_last_ch == '1'); |
||
814 | mri_state = NULL; |
||
815 | |||
816 | /* We continue handling the character as usual. The |
||
817 | main gas reader must also handle the .mri pseudo-op |
||
818 | to control expression parsing and the like. */ |
||
819 | } |
||
820 | } |
||
821 | #endif |
||
822 | |||
823 | if (ch == EOF) |
||
824 | { |
||
825 | if (state != 0) |
||
826 | { |
||
827 | as_warn (_("end of file not at end of a line; newline inserted")); |
||
828 | state = 0; |
||
829 | PUT ('\n'); |
||
830 | } |
||
831 | goto fromeof; |
||
832 | } |
||
833 | |||
834 | switch (lex[ch]) |
||
835 | { |
||
836 | case LEX_IS_WHITESPACE: |
||
837 | do |
||
838 | { |
||
839 | ch = GET (); |
||
840 | } |
||
841 | while (ch != EOF && IS_WHITESPACE (ch)); |
||
842 | if (ch == EOF) |
||
843 | goto fromeof; |
||
844 | |||
845 | if (state == 0) |
||
846 | { |
||
847 | /* Preserve a single whitespace character at the |
||
848 | beginning of a line. */ |
||
849 | state = 1; |
||
850 | UNGET (ch); |
||
851 | PUT (' '); |
||
852 | break; |
||
853 | } |
||
854 | |||
855 | #ifdef KEEP_WHITE_AROUND_COLON |
||
856 | if (lex[ch] == LEX_IS_COLON) |
||
857 | { |
||
858 | /* Only keep this white if there's no white *after* the |
||
859 | colon. */ |
||
860 | ch2 = GET (); |
||
861 | if (ch2 != EOF) |
||
862 | UNGET (ch2); |
||
863 | if (!IS_WHITESPACE (ch2)) |
||
864 | { |
||
865 | state = 9; |
||
866 | UNGET (ch); |
||
867 | PUT (' '); |
||
868 | break; |
||
869 | } |
||
870 | } |
||
871 | #endif |
||
872 | if (IS_COMMENT (ch) |
||
873 | || ch == '/' |
||
874 | || IS_LINE_SEPARATOR (ch) |
||
875 | || IS_PARALLEL_SEPARATOR (ch)) |
||
876 | { |
||
877 | if (scrub_m68k_mri) |
||
878 | { |
||
879 | /* In MRI mode, we keep these spaces. */ |
||
880 | UNGET (ch); |
||
881 | PUT (' '); |
||
882 | break; |
||
883 | } |
||
884 | goto recycle; |
||
885 | } |
||
886 | |||
887 | /* If we're in state 2 or 11, we've seen a non-white |
||
888 | character followed by whitespace. If the next character |
||
889 | is ':', this is whitespace after a label name which we |
||
890 | normally must ignore. In MRI mode, though, spaces are |
||
891 | not permitted between the label and the colon. */ |
||
892 | if ((state == 2 || state == 11) |
||
893 | && lex[ch] == LEX_IS_COLON |
||
894 | && ! scrub_m68k_mri) |
||
895 | { |
||
896 | state = 1; |
||
897 | PUT (ch); |
||
898 | break; |
||
899 | } |
||
900 | |||
901 | switch (state) |
||
902 | { |
||
903 | case 1: |
||
904 | /* We can arrive here if we leave a leading whitespace |
||
905 | character at the beginning of a line. */ |
||
906 | goto recycle; |
||
907 | case 2: |
||
908 | state = 3; |
||
909 | if (to + 1 < toend) |
||
910 | { |
||
911 | /* Optimize common case by skipping UNGET/GET. */ |
||
912 | PUT (' '); /* Sp after opco */ |
||
913 | goto recycle; |
||
914 | } |
||
915 | UNGET (ch); |
||
916 | PUT (' '); |
||
917 | break; |
||
918 | case 3: |
||
919 | #ifndef TC_KEEP_OPERAND_SPACES |
||
920 | /* For TI C6X, we keep these spaces as they may separate |
||
921 | functional unit specifiers from operands. */ |
||
922 | if (scrub_m68k_mri) |
||
923 | #endif |
||
924 | { |
||
925 | /* In MRI mode, we keep these spaces. */ |
||
926 | UNGET (ch); |
||
927 | PUT (' '); |
||
928 | break; |
||
929 | } |
||
930 | goto recycle; /* Sp in operands */ |
||
931 | case 9: |
||
932 | case 10: |
||
933 | #ifndef TC_KEEP_OPERAND_SPACES |
||
934 | if (scrub_m68k_mri) |
||
935 | #endif |
||
936 | { |
||
937 | /* In MRI mode, we keep these spaces. */ |
||
938 | state = 3; |
||
939 | UNGET (ch); |
||
940 | PUT (' '); |
||
941 | break; |
||
942 | } |
||
943 | state = 10; /* Sp after symbol char */ |
||
944 | goto recycle; |
||
945 | case 11: |
||
946 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
||
947 | state = 1; |
||
948 | else |
||
949 | { |
||
950 | /* We know that ch is not ':', since we tested that |
||
951 | case above. Therefore this is not a label, so it |
||
952 | must be the opcode, and we've just seen the |
||
953 | whitespace after it. */ |
||
954 | state = 3; |
||
955 | } |
||
956 | UNGET (ch); |
||
957 | PUT (' '); /* Sp after label definition. */ |
||
958 | break; |
||
959 | default: |
||
960 | BAD_CASE (state); |
||
961 | } |
||
962 | break; |
||
963 | |||
964 | case LEX_IS_TWOCHAR_COMMENT_1ST: |
||
965 | ch2 = GET (); |
||
966 | if (ch2 == '*') |
||
967 | { |
||
968 | for (;;) |
||
969 | { |
||
970 | do |
||
971 | { |
||
972 | ch2 = GET (); |
||
973 | if (ch2 != EOF && IS_NEWLINE (ch2)) |
||
974 | add_newlines++; |
||
975 | } |
||
976 | while (ch2 != EOF && ch2 != '*'); |
||
977 | |||
978 | while (ch2 == '*') |
||
979 | ch2 = GET (); |
||
980 | |||
981 | if (ch2 == EOF || ch2 == '/') |
||
982 | break; |
||
983 | |||
984 | /* This UNGET will ensure that we count newlines |
||
985 | correctly. */ |
||
986 | UNGET (ch2); |
||
987 | } |
||
988 | |||
989 | if (ch2 == EOF) |
||
990 | as_warn (_("end of file in multiline comment")); |
||
991 | |||
992 | ch = ' '; |
||
993 | goto recycle; |
||
994 | } |
||
995 | #ifdef DOUBLESLASH_LINE_COMMENTS |
||
996 | else if (ch2 == '/') |
||
997 | { |
||
998 | do |
||
999 | { |
||
1000 | ch = GET (); |
||
1001 | } |
||
1002 | while (ch != EOF && !IS_NEWLINE (ch)); |
||
1003 | if (ch == EOF) |
||
1004 | as_warn ("end of file in comment; newline inserted"); |
||
1005 | state = 0; |
||
1006 | PUT ('\n'); |
||
1007 | break; |
||
1008 | } |
||
1009 | #endif |
||
1010 | else |
||
1011 | { |
||
1012 | if (ch2 != EOF) |
||
1013 | UNGET (ch2); |
||
1014 | if (state == 9 || state == 10) |
||
1015 | state = 3; |
||
1016 | PUT (ch); |
||
1017 | } |
||
1018 | break; |
||
1019 | |||
1020 | case LEX_IS_STRINGQUOTE: |
||
1021 | quotechar = ch; |
||
1022 | if (state == 10) |
||
1023 | { |
||
1024 | /* Preserve the whitespace in foo "bar". */ |
||
1025 | UNGET (ch); |
||
1026 | state = 3; |
||
1027 | PUT (' '); |
||
1028 | |||
1029 | /* PUT didn't jump out. We could just break, but we |
||
1030 | know what will happen, so optimize a bit. */ |
||
1031 | ch = GET (); |
||
1032 | old_state = 3; |
||
1033 | } |
||
1034 | else if (state == 9) |
||
1035 | old_state = 3; |
||
1036 | else |
||
1037 | old_state = state; |
||
1038 | state = 5; |
||
1039 | PUT (ch); |
||
1040 | break; |
||
1041 | |||
1042 | #ifndef IEEE_STYLE |
||
1043 | case LEX_IS_ONECHAR_QUOTE: |
||
1044 | #ifdef H_TICK_HEX |
||
1045 | if (state == 9 && enable_h_tick_hex) |
||
1046 | { |
||
1047 | char c; |
||
1048 | |||
1049 | c = GET (); |
||
1050 | as_warn ("'%c found after symbol", c); |
||
1051 | UNGET (c); |
||
1052 | } |
||
1053 | #endif |
||
1054 | if (state == 10) |
||
1055 | { |
||
1056 | /* Preserve the whitespace in foo 'b'. */ |
||
1057 | UNGET (ch); |
||
1058 | state = 3; |
||
1059 | PUT (' '); |
||
1060 | break; |
||
1061 | } |
||
1062 | ch = GET (); |
||
1063 | if (ch == EOF) |
||
1064 | { |
||
1065 | as_warn (_("end of file after a one-character quote; \\0 inserted")); |
||
1066 | ch = 0; |
||
1067 | } |
||
1068 | if (ch == '\\') |
||
1069 | { |
||
1070 | ch = GET (); |
||
1071 | if (ch == EOF) |
||
1072 | { |
||
1073 | as_warn (_("end of file in escape character")); |
||
1074 | ch = '\\'; |
||
1075 | } |
||
1076 | else |
||
1077 | ch = process_escape (ch); |
||
1078 | } |
||
1079 | sprintf (out_buf, "%d", (int) (unsigned char) ch); |
||
1080 | |||
1081 | /* None of these 'x constants for us. We want 'x'. */ |
||
1082 | if ((ch = GET ()) != '\'') |
||
1083 | { |
||
1084 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE |
||
1085 | as_warn (_("missing close quote; (assumed)")); |
||
1086 | #else |
||
1087 | if (ch != EOF) |
||
1088 | UNGET (ch); |
||
1089 | #endif |
||
1090 | } |
||
1091 | if (strlen (out_buf) == 1) |
||
1092 | { |
||
1093 | PUT (out_buf[0]); |
||
1094 | break; |
||
1095 | } |
||
1096 | if (state == 9) |
||
1097 | old_state = 3; |
||
1098 | else |
||
1099 | old_state = state; |
||
1100 | state = -1; |
||
1101 | out_string = out_buf; |
||
1102 | PUT (*out_string++); |
||
1103 | break; |
||
1104 | #endif |
||
1105 | |||
1106 | case LEX_IS_COLON: |
||
1107 | #ifdef KEEP_WHITE_AROUND_COLON |
||
1108 | state = 9; |
||
1109 | #else |
||
1110 | if (state == 9 || state == 10) |
||
1111 | state = 3; |
||
1112 | else if (state != 3) |
||
1113 | state = 1; |
||
1114 | #endif |
||
1115 | PUT (ch); |
||
1116 | break; |
||
1117 | |||
1118 | case LEX_IS_NEWLINE: |
||
1119 | /* Roll out a bunch of newlines from inside comments, etc. */ |
||
1120 | if (add_newlines) |
||
1121 | { |
||
1122 | --add_newlines; |
||
1123 | UNGET (ch); |
||
1124 | } |
||
1125 | /* Fall through. */ |
||
1126 | |||
1127 | case LEX_IS_LINE_SEPARATOR: |
||
1128 | state = 0; |
||
1129 | PUT (ch); |
||
1130 | break; |
||
1131 | |||
1132 | case LEX_IS_PARALLEL_SEPARATOR: |
||
1133 | state = 1; |
||
1134 | PUT (ch); |
||
1135 | break; |
||
1136 | |||
1137 | #ifdef TC_V850 |
||
1138 | case LEX_IS_DOUBLEDASH_1ST: |
||
1139 | ch2 = GET (); |
||
1140 | if (ch2 != '-') |
||
1141 | { |
||
1142 | if (ch2 != EOF) |
||
1143 | UNGET (ch2); |
||
1144 | goto de_fault; |
||
1145 | } |
||
1146 | /* Read and skip to end of line. */ |
||
1147 | do |
||
1148 | { |
||
1149 | ch = GET (); |
||
1150 | } |
||
1151 | while (ch != EOF && ch != '\n'); |
||
1152 | |||
1153 | if (ch == EOF) |
||
1154 | as_warn (_("end of file in comment; newline inserted")); |
||
1155 | |||
1156 | state = 0; |
||
1157 | PUT ('\n'); |
||
1158 | break; |
||
1159 | #endif |
||
1160 | #ifdef DOUBLEBAR_PARALLEL |
||
1161 | case LEX_IS_DOUBLEBAR_1ST: |
||
1162 | ch2 = GET (); |
||
1163 | if (ch2 != EOF) |
||
1164 | UNGET (ch2); |
||
1165 | if (ch2 != '|') |
||
1166 | goto de_fault; |
||
1167 | |||
1168 | /* Handle '||' in two states as invoking PUT twice might |
||
1169 | result in the first one jumping out of this loop. We'd |
||
1170 | then lose track of the state and one '|' char. */ |
||
1171 | state = 13; |
||
1172 | PUT ('|'); |
||
1173 | break; |
||
1174 | #endif |
||
1175 | case LEX_IS_LINE_COMMENT_START: |
||
1176 | /* FIXME-someday: The two character comment stuff was badly |
||
1177 | thought out. On i386, we want '/' as line comment start |
||
1178 | AND we want C style comments. hence this hack. The |
||
1179 | whole lexical process should be reworked. xoxorich. */ |
||
1180 | if (ch == '/') |
||
1181 | { |
||
1182 | ch2 = GET (); |
||
1183 | if (ch2 == '*') |
||
1184 | { |
||
1185 | old_state = 3; |
||
1186 | state = -2; |
||
1187 | break; |
||
1188 | } |
||
1189 | else |
||
1190 | { |
||
1191 | UNGET (ch2); |
||
1192 | } |
||
1193 | } |
||
1194 | |||
1195 | if (state == 0 || state == 1) /* Only comment at start of line. */ |
||
1196 | { |
||
1197 | int startch; |
||
1198 | |||
1199 | startch = ch; |
||
1200 | |||
1201 | do |
||
1202 | { |
||
1203 | ch = GET (); |
||
1204 | } |
||
1205 | while (ch != EOF && IS_WHITESPACE (ch)); |
||
1206 | |||
1207 | if (ch == EOF) |
||
1208 | { |
||
1209 | as_warn (_("end of file in comment; newline inserted")); |
||
1210 | PUT ('\n'); |
||
1211 | break; |
||
1212 | } |
||
1213 | |||
1214 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
||
1215 | { |
||
1216 | /* Not a cpp line. */ |
||
1217 | while (ch != EOF && !IS_NEWLINE (ch)) |
||
1218 | ch = GET (); |
||
1219 | if (ch == EOF) |
||
1220 | as_warn (_("end of file in comment; newline inserted")); |
||
1221 | state = 0; |
||
1222 | PUT ('\n'); |
||
1223 | break; |
||
1224 | } |
||
1225 | /* Looks like `# 123 "filename"' from cpp. */ |
||
1226 | UNGET (ch); |
||
1227 | old_state = 4; |
||
1228 | state = -1; |
||
1229 | if (scrub_m68k_mri) |
||
1230 | out_string = "\tlinefile "; |
||
1231 | else |
||
1232 | out_string = "\t.linefile "; |
||
1233 | PUT (*out_string++); |
||
1234 | break; |
||
1235 | } |
||
1236 | |||
1237 | #ifdef TC_D10V |
||
1238 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. |
||
1239 | Trap is the only short insn that has a first operand that is |
||
1240 | neither register nor label. |
||
1241 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . |
||
1242 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
||
1243 | already LEX_IS_LINE_COMMENT_START. However, it is the |
||
1244 | only character in line_comment_chars for d10v, hence we |
||
1245 | can recognize it as such. */ |
||
1246 | /* An alternative approach would be to reset the state to 1 when |
||
1247 | we see '||', '<'- or '->', but that seems to be overkill. */ |
||
1248 | if (state == 10) |
||
1249 | PUT (' '); |
||
1250 | #endif |
||
1251 | /* We have a line comment character which is not at the |
||
1252 | start of a line. If this is also a normal comment |
||
1253 | character, fall through. Otherwise treat it as a default |
||
1254 | character. */ |
||
1255 | if (strchr (tc_comment_chars, ch) == NULL |
||
1256 | && (! scrub_m68k_mri |
||
1257 | || (ch != '!' && ch != '*'))) |
||
1258 | goto de_fault; |
||
1259 | if (scrub_m68k_mri |
||
1260 | && (ch == '!' || ch == '*' || ch == '#') |
||
1261 | && state != 1 |
||
1262 | && state != 10) |
||
1263 | goto de_fault; |
||
1264 | /* Fall through. */ |
||
1265 | case LEX_IS_COMMENT_START: |
||
1266 | #if defined TC_ARM && defined OBJ_ELF |
||
1267 | /* On the ARM, `@' is the comment character. |
||
1268 | Unfortunately this is also a special character in ELF .symver |
||
1269 | directives (and .type, though we deal with those another way). |
||
1270 | So we check if this line is such a directive, and treat |
||
1271 | the character as default if so. This is a hack. */ |
||
1272 | if ((symver_state != NULL) && (*symver_state == 0)) |
||
1273 | goto de_fault; |
||
1274 | #endif |
||
1275 | |||
1276 | #ifdef TC_ARM |
||
1277 | /* For the ARM, care is needed not to damage occurrences of \@ |
||
1278 | by stripping the @ onwards. Yuck. */ |
||
1279 | if (to > tostart && *(to - 1) == '\\') |
||
1280 | /* Do not treat the @ as a start-of-comment. */ |
||
1281 | goto de_fault; |
||
1282 | #endif |
||
1283 | |||
1284 | #ifdef WARN_COMMENTS |
||
1285 | if (!found_comment) |
||
1286 | as_where (&found_comment_file, &found_comment); |
||
1287 | #endif |
||
1288 | do |
||
1289 | { |
||
1290 | ch = GET (); |
||
1291 | } |
||
1292 | while (ch != EOF && !IS_NEWLINE (ch)); |
||
1293 | if (ch == EOF) |
||
1294 | as_warn (_("end of file in comment; newline inserted")); |
||
1295 | state = 0; |
||
1296 | PUT ('\n'); |
||
1297 | break; |
||
1298 | |||
1299 | #ifdef H_TICK_HEX |
||
1300 | case LEX_IS_H: |
||
1301 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace |
||
1302 | the H' with 0x to make them gas-style hex characters. */ |
||
1303 | if (enable_h_tick_hex) |
||
1304 | { |
||
1305 | char quot; |
||
1306 | |||
1307 | quot = GET (); |
||
1308 | if (quot == '\'') |
||
1309 | { |
||
1310 | UNGET ('x'); |
||
1311 | ch = '0'; |
||
1312 | } |
||
1313 | else |
||
1314 | UNGET (quot); |
||
1315 | } |
||
1316 | /* FALL THROUGH */ |
||
1317 | #endif |
||
1318 | |||
1319 | case LEX_IS_SYMBOL_COMPONENT: |
||
1320 | if (state == 10) |
||
1321 | { |
||
1322 | /* This is a symbol character following another symbol |
||
1323 | character, with whitespace in between. We skipped |
||
1324 | the whitespace earlier, so output it now. */ |
||
1325 | UNGET (ch); |
||
1326 | state = 3; |
||
1327 | PUT (' '); |
||
1328 | break; |
||
1329 | } |
||
1330 | |||
1331 | #ifdef TC_Z80 |
||
1332 | /* "af'" is a symbol containing '\''. */ |
||
1333 | if (state == 3 && (ch == 'a' || ch == 'A')) |
||
1334 | { |
||
1335 | state = 16; |
||
1336 | PUT (ch); |
||
1337 | ch = GET (); |
||
1338 | if (ch == 'f' || ch == 'F') |
||
1339 | { |
||
1340 | state = 17; |
||
1341 | PUT (ch); |
||
1342 | break; |
||
1343 | } |
||
1344 | else |
||
1345 | { |
||
1346 | state = 9; |
||
1347 | if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) |
||
1348 | { |
||
1349 | if (ch != EOF) |
||
1350 | UNGET (ch); |
||
1351 | break; |
||
1352 | } |
||
1353 | } |
||
1354 | } |
||
1355 | #endif |
||
1356 | if (state == 3) |
||
1357 | state = 9; |
||
1358 | |||
1359 | /* This is a common case. Quickly copy CH and all the |
||
1360 | following symbol component or normal characters. */ |
||
1361 | if (to + 1 < toend |
||
1362 | && mri_state == NULL |
||
1363 | #if defined TC_ARM && defined OBJ_ELF |
||
1364 | && symver_state == NULL |
||
1365 | #endif |
||
1366 | ) |
||
1367 | { |
||
1368 | char *s; |
||
1369 | ptrdiff_t len; |
||
1370 | |||
1371 | for (s = from; s < fromend; s++) |
||
1372 | { |
||
1373 | int type; |
||
1374 | |||
1375 | ch2 = *(unsigned char *) s; |
||
1376 | type = lex[ch2]; |
||
1377 | if (type != 0 |
||
1378 | && type != LEX_IS_SYMBOL_COMPONENT) |
||
1379 | break; |
||
1380 | } |
||
1381 | |||
1382 | if (s > from) |
||
1383 | /* Handle the last character normally, for |
||
1384 | simplicity. */ |
||
1385 | --s; |
||
1386 | |||
1387 | len = s - from; |
||
1388 | |||
1389 | if (len > (toend - to) - 1) |
||
1390 | len = (toend - to) - 1; |
||
1391 | |||
1392 | if (len > 0) |
||
1393 | { |
||
1394 | PUT (ch); |
||
1395 | memcpy (to, from, len); |
||
1396 | to += len; |
||
1397 | from += len; |
||
1398 | if (to >= toend) |
||
1399 | goto tofull; |
||
1400 | ch = GET (); |
||
1401 | } |
||
1402 | } |
||
1403 | |||
1404 | /* Fall through. */ |
||
1405 | default: |
||
1406 | de_fault: |
||
1407 | /* Some relatively `normal' character. */ |
||
1408 | if (state == 0) |
||
1409 | { |
||
1410 | state = 11; /* Now seeing label definition. */ |
||
1411 | } |
||
1412 | else if (state == 1) |
||
1413 | { |
||
1414 | state = 2; /* Ditto. */ |
||
1415 | } |
||
1416 | else if (state == 9) |
||
1417 | { |
||
1418 | if (!IS_SYMBOL_COMPONENT (ch)) |
||
1419 | state = 3; |
||
1420 | } |
||
1421 | else if (state == 10) |
||
1422 | { |
||
1423 | if (ch == '\\') |
||
1424 | { |
||
1425 | /* Special handling for backslash: a backslash may |
||
1426 | be the beginning of a formal parameter (of a |
||
1427 | macro) following another symbol character, with |
||
1428 | whitespace in between. If that is the case, we |
||
1429 | output a space before the parameter. Strictly |
||
1430 | speaking, correct handling depends upon what the |
||
1431 | macro parameter expands into; if the parameter |
||
1432 | expands into something which does not start with |
||
1433 | an operand character, then we don't want to keep |
||
1434 | the space. We don't have enough information to |
||
1435 | make the right choice, so here we are making the |
||
1436 | choice which is more likely to be correct. */ |
||
1437 | if (to + 1 >= toend) |
||
1438 | { |
||
1439 | /* If we're near the end of the buffer, save the |
||
1440 | character for the next time round. Otherwise |
||
1441 | we'll lose our state. */ |
||
1442 | UNGET (ch); |
||
1443 | goto tofull; |
||
1444 | } |
||
1445 | *to++ = ' '; |
||
1446 | } |
||
1447 | |||
1448 | state = 3; |
||
1449 | } |
||
1450 | PUT (ch); |
||
1451 | break; |
||
1452 | } |
||
1453 | } |
||
1454 | |||
1455 | /*NOTREACHED*/ |
||
1456 | |||
1457 | fromeof: |
||
1458 | /* We have reached the end of the input. */ |
||
1459 | return to - tostart; |
||
1460 | |||
1461 | tofull: |
||
1462 | /* The output buffer is full. Save any input we have not yet |
||
1463 | processed. */ |
||
1464 | if (fromend > from) |
||
1465 | { |
||
1466 | saved_input = from; |
||
1467 | saved_input_len = fromend - from; |
||
1468 | } |
||
1469 | else |
||
1470 | saved_input = NULL; |
||
1471 | |||
1472 | return to - tostart; |
||
1473 | }>>'->>>>=>>=>-".>> |