d9c9d10d9d
A few more changes to edify:
- fix write_raw_image(); my last change neglected to close the write
context, so the written image was corrupt.
- each expression tracks the span of the source code from which it
was compiled, so that assert()'s error message can include the
source of the expression that failed.
- the 'cookie' argument to each Function is replaced with a State
object, which contains the cookie, the source script (for use with
the above spans), and the current error message (replacing the
global variables that were used for this purpose).
- in the recovery image, a new command "ui_print" can be sent back
through the command pipe to cause text to appear on the screen.
Add a new ui_print() function to print things from scripts.
Rename existing "print" function to "stdout".
110 lines
2.4 KiB
Text
110 lines
2.4 KiB
Text
%{
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "expr.h"
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#include "yydefs.h"
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#include "parser.h"
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int gLine = 1;
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int gColumn = 1;
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int gPos = 0;
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// TODO: enforce MAX_STRING_LEN during lexing
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char string_buffer[MAX_STRING_LEN];
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char* string_pos;
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#define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
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gColumn+=yyleng; gPos+=yyleng;} while(0)
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%}
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%x STR
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%option noyywrap
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%%
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\" {
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BEGIN(STR);
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string_pos = string_buffer;
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yylloc.start = gPos;
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++gColumn;
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++gPos;
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}
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<STR>{
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\" {
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++gColumn;
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++gPos;
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BEGIN(INITIAL);
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*string_pos = '\0';
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yylval.str = strdup(string_buffer);
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yylloc.end = gPos;
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return STRING;
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}
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\\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; }
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\\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; }
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\\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; }
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\\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; }
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\\x[0-9a-fA-F]{2} {
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gColumn += yyleng;
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gPos += yyleng;
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int val;
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sscanf(yytext+2, "%x", &val);
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*string_pos++ = val;
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}
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\n {
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++gLine;
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++gPos;
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gColumn = 1;
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*string_pos++ = yytext[0];
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}
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. {
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++gColumn;
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++gPos;
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*string_pos++ = yytext[0];
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}
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}
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if ADVANCE; return IF;
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then ADVANCE; return THEN;
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else ADVANCE; return ELSE;
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endif ADVANCE; return ENDIF;
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[a-zA-Z0-9_:/.]+ {
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ADVANCE;
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yylval.str = strdup(yytext);
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return STRING;
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}
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\&\& ADVANCE; return AND;
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\|\| ADVANCE; return OR;
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== ADVANCE; return EQ;
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!= ADVANCE; return NE;
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[+(),!;] ADVANCE; return yytext[0];
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[ \t]+ ADVANCE;
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(#.*)?\n gPos += yyleng; ++gLine; gColumn = 1;
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. return BAD;
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