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authorDoug Zongker <dougz@android.com>2009-07-15 01:31:56 +0200
committerDoug Zongker <dougz@android.com>2009-07-15 01:58:42 +0200
commit64893ccc09b25ac31bc6a17f5c7f43c7fa789576 (patch)
treea56912e18b608b123f1c4454293d2b2aa36fa96a /amend/lexer.l
parentskip over all-zero blocks when reading MTD partition (diff)
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Diffstat (limited to '')
-rw-r--r--amend/lexer.l299
1 files changed, 0 insertions, 299 deletions
diff --git a/amend/lexer.l b/amend/lexer.l
deleted file mode 100644
index 80896d11f..000000000
--- a/amend/lexer.l
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * Copyright (C) 2007 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-%{
- #include <stdio.h>
- #include <stdlib.h>
- #include "ast.h"
- #include "lexer.h"
- #include "parser.h"
-
- const char *tokenToString(int token)
- {
- static char scratch[128];
-
- switch (token) {
- case TOK_AND:
- return "&&";
- case TOK_OR:
- return "||";
- case TOK_EQ:
- return "==";
- case TOK_NE:
- return "!=";
- case TOK_GE:
- return ">=";
- case TOK_LE:
- return "<=";
- case TOK_EOF:
- return "EOF";
- case TOK_EOL:
- return "EOL\n";
- case TOK_STRING:
- snprintf(scratch, sizeof(scratch),
- "STRING<%s>", yylval.literalString);
- return scratch;
- case TOK_IDENTIFIER:
- snprintf(scratch, sizeof(scratch), "IDENTIFIER<%s>",
- yylval.literalString);
- return scratch;
- case TOK_WORD:
- snprintf(scratch, sizeof(scratch), "WORD<%s>",
- yylval.literalString);
- return scratch;
- default:
- if (token > ' ' && token <= '~') {
- scratch[0] = (char)token;
- scratch[1] = '\0';
- } else {
- snprintf(scratch, sizeof(scratch), "??? <%d>", token);
- }
- return scratch;
- }
- }
-
- typedef struct {
- char *value;
- char *nextc;
- unsigned int alloc_size;
- } AmString;
-
- static int addCharToString(AmString *str, char c)
- {
- if ((unsigned int)(str->nextc - str->value) >= str->alloc_size) {
- char *new_value;
- unsigned int new_size;
-
- new_size = (str->alloc_size + 1) * 2;
- if (new_size < 64) {
- new_size = 64;
- }
-
- new_value = (char *)realloc(str->value, new_size);
- if (new_value == NULL) {
- yyerror("out of memory");
- return -1;
- }
- str->nextc = str->nextc - str->value + new_value;
- str->value = new_value;
- str->alloc_size = new_size;
- }
- *str->nextc++ = c;
- return 0;
- }
-
- static int setString(AmString *str, const char *p)
- {
- str->nextc = str->value;
- while (*p != '\0') {
-//TODO: add the whole string at once
- addCharToString(str, *p++);
- }
- return addCharToString(str, '\0');
- }
-
- static AmString gStr = { NULL, NULL, 0 };
- static int gLineNumber = 1;
- static AmArgumentType gArgumentType = AM_UNKNOWN_ARGS;
- static const char *gErrorMessage = NULL;
-
-#if AMEND_LEXER_BUFFER_INPUT
- static const char *gInputBuffer;
- static const char *gInputBufferNext;
- static const char *gInputBufferEnd;
-
-# define YY_INPUT(buf, result, max_size) \
- do { \
- int nbytes = gInputBufferEnd - gInputBufferNext; \
- if (nbytes > 0) { \
- if (nbytes > max_size) { \
- nbytes = max_size; \
- } \
- memcpy(buf, gInputBufferNext, nbytes); \
- gInputBufferNext += nbytes; \
- result = nbytes; \
- } else { \
- result = YY_NULL; \
- } \
- } while (false)
-#endif // AMEND_LEXER_BUFFER_INPUT
-
-%}
-
-%option noyywrap
-
-%x QUOTED_STRING BOOLEAN WORDS
-
-ident [a-zA-Z_][a-zA-Z_0-9]*
-word [^ \t\r\n"]+
-
-%%
- /* This happens at the beginning of each call to yylex().
- */
- if (gArgumentType == AM_WORD_ARGS) {
- BEGIN(WORDS);
- } else if (gArgumentType == AM_BOOLEAN_ARGS) {
- BEGIN(BOOLEAN);
- }
-
- /*xxx require everything to be 7-bit-clean, printable characters */
-<INITIAL>{
- {ident}/[ \t\r\n] {
- /* The only token we recognize in the initial
- * state is an identifier followed by whitespace.
- */
- setString(&gStr, yytext);
- yylval.literalString = gStr.value;
- return TOK_IDENTIFIER;
- }
- }
-
-<BOOLEAN>{
- {ident} {
- /* Non-quoted identifier-style string */
- setString(&gStr, yytext);
- yylval.literalString = gStr.value;
- return TOK_IDENTIFIER;
- }
- "&&" return TOK_AND;
- "||" return TOK_OR;
- "==" return TOK_EQ;
- "!=" return TOK_NE;
- ">=" return TOK_GE;
- "<=" return TOK_LE;
- [<>()!,] return yytext[0];
- }
-
- /* Double-quoted string handling */
-
-<WORDS,BOOLEAN>\" {
- /* Initial quote */
- gStr.nextc = gStr.value;
- BEGIN(QUOTED_STRING);
- }
-
-<QUOTED_STRING>{
- \" {
- /* Closing quote */
- BEGIN(INITIAL);
- addCharToString(&gStr, '\0');
- yylval.literalString = gStr.value;
- if (gArgumentType == AM_WORD_ARGS) {
- return TOK_WORD;
- } else {
- return TOK_STRING;
- }
- }
-
- <<EOF>> |
- \n {
- /* Unterminated string */
- yyerror("unterminated string");
- return TOK_ERROR;
- }
-
- \\\" {
- /* Escaped quote */
- addCharToString(&gStr, '"');
- }
-
- \\\\ {
- /* Escaped backslash */
- addCharToString(&gStr, '\\');
- }
-
- \\. {
- /* No other escapes allowed. */
- gErrorMessage = "illegal escape";
- return TOK_ERROR;
- }
-
- [^\\\n\"]+ {
- /* String contents */
- char *p = yytext;
- while (*p != '\0') {
- /* TODO: add the whole string at once */
- addCharToString(&gStr, *p++);
- }
- }
- }
-
-<WORDS>{
- /*xxx look out for backslashes; escape backslashes and quotes */
- /*xxx if a quote is right against a char, we should append */
- {word} {
- /* Whitespace-separated word */
- setString(&gStr, yytext);
- yylval.literalString = gStr.value;
- return TOK_WORD;
- }
- }
-
-<INITIAL,WORDS,BOOLEAN>{
- \n {
- /* Count lines */
- gLineNumber++;
- gArgumentType = AM_UNKNOWN_ARGS;
- BEGIN(INITIAL);
- return TOK_EOL;
- }
-
- /*xxx backslashes to extend lines? */
- /* Skip whitespace and comments.
- */
- [ \t\r]+ ;
- #.* ;
-
- . {
- /* Fail on anything we didn't expect. */
- gErrorMessage = "unexpected character";
- return TOK_ERROR;
- }
- }
-%%
-
-void
-yyerror(const char *msg)
-{
- if (!strcmp(msg, "syntax error") && gErrorMessage != NULL) {
- msg = gErrorMessage;
- gErrorMessage = NULL;
- }
- fprintf(stderr, "line %d: %s at '%s'\n", gLineNumber, msg, yytext);
-}
-
-#if AMEND_LEXER_BUFFER_INPUT
-void
-setLexerInputBuffer(const char *buf, size_t buflen)
-{
- gLineNumber = 1;
- gInputBuffer = buf;
- gInputBufferNext = gInputBuffer;
- gInputBufferEnd = gInputBuffer + buflen;
-}
-#endif // AMEND_LEXER_BUFFER_INPUT
-
-void
-setLexerArgumentType(AmArgumentType type)
-{
- gArgumentType = type;
-}
-
-int
-getLexerLineNumber(void)
-{
- return gLineNumber;
-}