summaryrefslogtreecommitdiffstats
path: root/edify/lexer.l
diff options
context:
space:
mode:
authorJean-Baptiste Queru <jbq@google.com>2009-07-26 02:48:00 +0200
committerJean-Baptiste Queru <jbq@google.com>2009-07-26 02:48:00 +0200
commit7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7 (patch)
tree88c0fc6a69cade6f9d4437666c6420e0f757e278 /edify/lexer.l
parentMerge commit 'korg/cupcake' (diff)
parentskip over all-zero blocks when reading MTD partition (diff)
downloadandroid_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar.gz
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar.bz2
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar.lz
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar.xz
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.tar.zst
android_bootable_recovery-7bd5c660752ddd1b4ff6127b316fd6d8fb1005c7.zip
Diffstat (limited to 'edify/lexer.l')
-rw-r--r--edify/lexer.l110
1 files changed, 110 insertions, 0 deletions
diff --git a/edify/lexer.l b/edify/lexer.l
new file mode 100644
index 000000000..2c4489cc6
--- /dev/null
+++ b/edify/lexer.l
@@ -0,0 +1,110 @@
+%{
+/*
+ * Copyright (C) 2009 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 "expr.h"
+#include "yydefs.h"
+#include "parser.h"
+
+int gLine = 1;
+int gColumn = 1;
+int gPos = 0;
+
+// TODO: enforce MAX_STRING_LEN during lexing
+char string_buffer[MAX_STRING_LEN];
+char* string_pos;
+
+#define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
+ gColumn+=yyleng; gPos+=yyleng;} while(0)
+
+%}
+
+%x STR
+
+%option noyywrap
+
+%%
+
+
+\" {
+ BEGIN(STR);
+ string_pos = string_buffer;
+ yylloc.start = gPos;
+ ++gColumn;
+ ++gPos;
+}
+
+<STR>{
+ \" {
+ ++gColumn;
+ ++gPos;
+ BEGIN(INITIAL);
+ *string_pos = '\0';
+ yylval.str = strdup(string_buffer);
+ yylloc.end = gPos;
+ return STRING;
+ }
+
+ \\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; }
+ \\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; }
+ \\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; }
+ \\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; }
+
+ \\x[0-9a-fA-F]{2} {
+ gColumn += yyleng;
+ gPos += yyleng;
+ int val;
+ sscanf(yytext+2, "%x", &val);
+ *string_pos++ = val;
+ }
+
+ \n {
+ ++gLine;
+ ++gPos;
+ gColumn = 1;
+ *string_pos++ = yytext[0];
+ }
+
+ . {
+ ++gColumn;
+ ++gPos;
+ *string_pos++ = yytext[0];
+ }
+}
+
+if ADVANCE; return IF;
+then ADVANCE; return THEN;
+else ADVANCE; return ELSE;
+endif ADVANCE; return ENDIF;
+
+[a-zA-Z0-9_:/.]+ {
+ ADVANCE;
+ yylval.str = strdup(yytext);
+ return STRING;
+}
+
+\&\& ADVANCE; return AND;
+\|\| ADVANCE; return OR;
+== ADVANCE; return EQ;
+!= ADVANCE; return NE;
+
+[+(),!;] ADVANCE; return yytext[0];
+
+[ \t]+ ADVANCE;
+
+(#.*)?\n gPos += yyleng; ++gLine; gColumn = 1;
+
+. return BAD;