[20] | 1 | %option backup nostdinit noyywrap never-interactive full ecs |
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| 2 | %option 8bit backup nodefault perf-report perf-report |
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| 3 | %x COMMAND HELP STRING PARAM |
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| 4 | %{ |
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| 5 | /* |
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| 6 | * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> |
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| 7 | * Released under the terms of the GNU GPL v2.0. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <limits.h> |
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| 11 | #include <stdio.h> |
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| 12 | #include <stdlib.h> |
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| 13 | #include <string.h> |
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| 14 | #include <unistd.h> |
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| 15 | |
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| 16 | #define LKC_DIRECT_LINK |
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| 17 | #include "lkc.h" |
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| 18 | |
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| 19 | #define START_STRSIZE 16 |
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| 20 | |
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| 21 | static struct { |
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| 22 | struct file *file; |
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| 23 | int lineno; |
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| 24 | } current_pos; |
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| 25 | |
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| 26 | static char *text; |
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| 27 | static int text_size, text_asize; |
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| 28 | |
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| 29 | struct buffer { |
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| 30 | struct buffer *parent; |
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| 31 | YY_BUFFER_STATE state; |
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| 32 | }; |
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| 33 | |
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| 34 | struct buffer *current_buf; |
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| 35 | |
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| 36 | static int last_ts, first_ts; |
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| 37 | |
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| 38 | static void zconf_endhelp(void); |
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| 39 | static void zconf_endfile(void); |
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| 40 | |
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| 41 | void new_string(void) |
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| 42 | { |
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| 43 | text = malloc(START_STRSIZE); |
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| 44 | text_asize = START_STRSIZE; |
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| 45 | text_size = 0; |
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| 46 | *text = 0; |
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| 47 | } |
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| 48 | |
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| 49 | void append_string(const char *str, int size) |
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| 50 | { |
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| 51 | int new_size = text_size + size + 1; |
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| 52 | if (new_size > text_asize) { |
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| 53 | new_size += START_STRSIZE - 1; |
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| 54 | new_size &= -START_STRSIZE; |
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| 55 | text = realloc(text, new_size); |
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| 56 | text_asize = new_size; |
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| 57 | } |
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| 58 | memcpy(text + text_size, str, size); |
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| 59 | text_size += size; |
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| 60 | text[text_size] = 0; |
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| 61 | } |
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| 62 | |
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| 63 | void alloc_string(const char *str, int size) |
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| 64 | { |
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| 65 | text = malloc(size + 1); |
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| 66 | memcpy(text, str, size); |
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| 67 | text[size] = 0; |
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| 68 | } |
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| 69 | %} |
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| 70 | |
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| 71 | ws [ \n\t] |
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| 72 | n [A-Za-z0-9_] |
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| 73 | |
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| 74 | %% |
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| 75 | int str = 0; |
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| 76 | int ts, i; |
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| 77 | |
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| 78 | [ \t]*#.*\n | |
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| 79 | [ \t]*\n { |
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| 80 | current_file->lineno++; |
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| 81 | return T_EOL; |
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| 82 | } |
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| 83 | [ \t]*#.* |
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| 84 | |
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| 85 | |
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| 86 | [ \t]+ { |
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| 87 | BEGIN(COMMAND); |
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| 88 | } |
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| 89 | |
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| 90 | . { |
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| 91 | unput(yytext[0]); |
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| 92 | BEGIN(COMMAND); |
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| 93 | } |
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| 94 | |
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| 95 | |
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| 96 | <COMMAND>{ |
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| 97 | {n}+ { |
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| 98 | struct kconf_id *id = kconf_id_lookup(yytext, yyleng); |
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| 99 | BEGIN(PARAM); |
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| 100 | current_pos.file = current_file; |
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| 101 | current_pos.lineno = current_file->lineno; |
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| 102 | if (id && id->flags & TF_COMMAND) { |
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| 103 | zconflval.id = id; |
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| 104 | return id->token; |
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| 105 | } |
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| 106 | alloc_string(yytext, yyleng); |
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| 107 | zconflval.string = text; |
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| 108 | return T_WORD; |
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| 109 | } |
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| 110 | . |
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| 111 | \n { |
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| 112 | BEGIN(INITIAL); |
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| 113 | current_file->lineno++; |
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| 114 | return T_EOL; |
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| 115 | } |
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| 116 | } |
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| 117 | |
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| 118 | <PARAM>{ |
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| 119 | "&&" return T_AND; |
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| 120 | "||" return T_OR; |
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| 121 | "(" return T_OPEN_PAREN; |
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| 122 | ")" return T_CLOSE_PAREN; |
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| 123 | "!" return T_NOT; |
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| 124 | "=" return T_EQUAL; |
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| 125 | "!=" return T_UNEQUAL; |
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| 126 | \"|\' { |
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| 127 | str = yytext[0]; |
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| 128 | new_string(); |
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| 129 | BEGIN(STRING); |
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| 130 | } |
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| 131 | \n BEGIN(INITIAL); current_file->lineno++; return T_EOL; |
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| 132 | --- /* ignore */ |
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| 133 | ({n}|[-/.])+ { |
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| 134 | struct kconf_id *id = kconf_id_lookup(yytext, yyleng); |
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| 135 | if (id && id->flags & TF_PARAM) { |
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| 136 | zconflval.id = id; |
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| 137 | return id->token; |
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| 138 | } |
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| 139 | alloc_string(yytext, yyleng); |
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| 140 | zconflval.string = text; |
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| 141 | return T_WORD; |
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| 142 | } |
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| 143 | #.* /* comment */ |
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| 144 | \\\n current_file->lineno++; |
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| 145 | . |
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| 146 | <<EOF>> { |
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| 147 | BEGIN(INITIAL); |
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| 148 | } |
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| 149 | } |
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| 150 | |
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| 151 | <STRING>{ |
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| 152 | [^'"\\\n]+/\n { |
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| 153 | append_string(yytext, yyleng); |
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| 154 | zconflval.string = text; |
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| 155 | return T_WORD_QUOTE; |
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| 156 | } |
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| 157 | [^'"\\\n]+ { |
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| 158 | append_string(yytext, yyleng); |
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| 159 | } |
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| 160 | \\.?/\n { |
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| 161 | append_string(yytext + 1, yyleng - 1); |
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| 162 | zconflval.string = text; |
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| 163 | return T_WORD_QUOTE; |
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| 164 | } |
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| 165 | \\.? { |
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| 166 | append_string(yytext + 1, yyleng - 1); |
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| 167 | } |
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| 168 | \'|\" { |
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| 169 | if (str == yytext[0]) { |
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| 170 | BEGIN(PARAM); |
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| 171 | zconflval.string = text; |
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| 172 | return T_WORD_QUOTE; |
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| 173 | } else |
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| 174 | append_string(yytext, 1); |
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| 175 | } |
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| 176 | \n { |
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| 177 | printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno()); |
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| 178 | current_file->lineno++; |
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| 179 | BEGIN(INITIAL); |
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| 180 | return T_EOL; |
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| 181 | } |
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| 182 | <<EOF>> { |
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| 183 | BEGIN(INITIAL); |
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| 184 | } |
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| 185 | } |
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| 186 | |
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| 187 | <HELP>{ |
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| 188 | [ \t]+ { |
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| 189 | ts = 0; |
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| 190 | for (i = 0; i < yyleng; i++) { |
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| 191 | if (yytext[i] == '\t') |
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| 192 | ts = (ts & ~7) + 8; |
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| 193 | else |
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| 194 | ts++; |
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| 195 | } |
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| 196 | last_ts = ts; |
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| 197 | if (first_ts) { |
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| 198 | if (ts < first_ts) { |
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| 199 | zconf_endhelp(); |
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| 200 | return T_HELPTEXT; |
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| 201 | } |
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| 202 | ts -= first_ts; |
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| 203 | while (ts > 8) { |
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| 204 | append_string(" ", 8); |
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| 205 | ts -= 8; |
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| 206 | } |
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| 207 | append_string(" ", ts); |
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| 208 | } |
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| 209 | } |
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| 210 | [ \t]*\n/[^ \t\n] { |
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| 211 | current_file->lineno++; |
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| 212 | zconf_endhelp(); |
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| 213 | return T_HELPTEXT; |
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| 214 | } |
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| 215 | [ \t]*\n { |
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| 216 | current_file->lineno++; |
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| 217 | append_string("\n", 1); |
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| 218 | } |
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| 219 | [^ \t\n].* { |
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| 220 | append_string(yytext, yyleng); |
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| 221 | if (!first_ts) |
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| 222 | first_ts = last_ts; |
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| 223 | } |
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| 224 | <<EOF>> { |
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| 225 | zconf_endhelp(); |
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| 226 | return T_HELPTEXT; |
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| 227 | } |
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| 228 | } |
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| 229 | |
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| 230 | <<EOF>> { |
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| 231 | if (current_file) { |
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| 232 | zconf_endfile(); |
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| 233 | return T_EOL; |
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| 234 | } |
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| 235 | fclose(yyin); |
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| 236 | yyterminate(); |
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| 237 | } |
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| 238 | |
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| 239 | %% |
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| 240 | void zconf_starthelp(void) |
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| 241 | { |
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| 242 | new_string(); |
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| 243 | last_ts = first_ts = 0; |
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| 244 | BEGIN(HELP); |
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| 245 | } |
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| 246 | |
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| 247 | static void zconf_endhelp(void) |
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| 248 | { |
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| 249 | zconflval.string = text; |
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| 250 | BEGIN(INITIAL); |
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| 251 | } |
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| 252 | |
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| 253 | |
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| 254 | /* |
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| 255 | * Try to open specified file with following names: |
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| 256 | * ./name |
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| 257 | * $(srctree)/name |
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| 258 | * The latter is used when srctree is separate from objtree |
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| 259 | * when compiling the kernel. |
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| 260 | * Return NULL if file is not found. |
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| 261 | */ |
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| 262 | FILE *zconf_fopen(const char *name) |
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| 263 | { |
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| 264 | char *env, fullname[PATH_MAX+1]; |
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| 265 | FILE *f; |
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| 266 | |
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| 267 | f = fopen(name, "r"); |
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| 268 | if (!f && name[0] != '/') { |
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| 269 | env = getenv(SRCTREE); |
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| 270 | if (env) { |
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| 271 | sprintf(fullname, "%s/%s", env, name); |
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| 272 | f = fopen(fullname, "r"); |
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| 273 | } |
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| 274 | } |
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| 275 | return f; |
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| 276 | } |
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| 277 | |
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| 278 | void zconf_initscan(const char *name) |
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| 279 | { |
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| 280 | yyin = zconf_fopen(name); |
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| 281 | if (!yyin) { |
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| 282 | printf("can't find file %s\n", name); |
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| 283 | exit(1); |
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| 284 | } |
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| 285 | |
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| 286 | current_buf = malloc(sizeof(*current_buf)); |
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| 287 | memset(current_buf, 0, sizeof(*current_buf)); |
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| 288 | |
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| 289 | current_file = file_lookup(name); |
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| 290 | current_file->lineno = 1; |
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| 291 | current_file->flags = FILE_BUSY; |
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| 292 | } |
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| 293 | |
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| 294 | void zconf_nextfile(const char *name) |
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| 295 | { |
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| 296 | struct file *file = file_lookup(name); |
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| 297 | struct buffer *buf = malloc(sizeof(*buf)); |
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| 298 | memset(buf, 0, sizeof(*buf)); |
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| 299 | |
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| 300 | current_buf->state = YY_CURRENT_BUFFER; |
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| 301 | yyin = zconf_fopen(name); |
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| 302 | if (!yyin) { |
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| 303 | printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name); |
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| 304 | exit(1); |
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| 305 | } |
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| 306 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); |
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| 307 | buf->parent = current_buf; |
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| 308 | current_buf = buf; |
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| 309 | |
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| 310 | if (file->flags & FILE_BUSY) { |
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| 311 | printf("recursive scan (%s)?\n", name); |
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| 312 | exit(1); |
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| 313 | } |
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| 314 | if (file->flags & FILE_SCANNED) { |
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| 315 | printf("file %s already scanned?\n", name); |
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| 316 | exit(1); |
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| 317 | } |
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| 318 | file->flags |= FILE_BUSY; |
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| 319 | file->lineno = 1; |
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| 320 | file->parent = current_file; |
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| 321 | current_file = file; |
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| 322 | } |
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| 323 | |
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| 324 | static void zconf_endfile(void) |
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| 325 | { |
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| 326 | struct buffer *parent; |
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| 327 | |
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| 328 | current_file->flags |= FILE_SCANNED; |
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| 329 | current_file->flags &= ~FILE_BUSY; |
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| 330 | current_file = current_file->parent; |
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| 331 | |
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| 332 | parent = current_buf->parent; |
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| 333 | if (parent) { |
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| 334 | fclose(yyin); |
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| 335 | yy_delete_buffer(YY_CURRENT_BUFFER); |
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| 336 | yy_switch_to_buffer(parent->state); |
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| 337 | } |
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| 338 | free(current_buf); |
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| 339 | current_buf = parent; |
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| 340 | } |
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| 341 | |
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| 342 | int zconf_lineno(void) |
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| 343 | { |
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| 344 | return current_pos.lineno; |
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| 345 | } |
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| 346 | |
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| 347 | char *zconf_curname(void) |
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| 348 | { |
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| 349 | return current_pos.file ? current_pos.file->name : "<none>"; |
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| 350 | } |
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