1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17D                   [0-9]
18L                   [a-zA-Z_]
19H                   [a-fA-F0-9]
20E                   [Ee][+-]?{D}+
21FS                  (f|F|l|L)
22IS                  (u|U|l|L)*
23
24COMPONENT           {L}({L}|{D})*
25DOT                 [.]
26AT                  [@]
27VERSION             {AT}{D}+{DOT}{D}+
28FQNAME              ({COMPONENT}|{VERSION})(({DOT}|":"+){COMPONENT}|{VERSION})*
29
30%{
31
32#include "Annotation.h"
33#include "AST.h"
34#include "ArrayType.h"
35#include "CompoundType.h"
36#include "ConstantExpression.h"
37#include "DeathRecipientType.h"
38#include "DocComment.h"
39#include "EnumType.h"
40#include "HandleType.h"
41#include "MemoryType.h"
42#include "Method.h"
43#include "PointerType.h"
44#include "ScalarType.h"
45#include "Scope.h"
46#include "StringType.h"
47#include "VectorType.h"
48#include "FmqType.h"
49
50#include "hidl-gen_y-helpers.h"
51
52#include <assert.h>
53#include <algorithm>
54#include <hidl-util/StringHelper.h>
55
56using namespace android;
57using token = yy::parser::token;
58
59#define SCALAR_TYPE(kind)                                        \
60    {                                                            \
61        yylval->type = new ScalarType(ScalarType::kind, *scope); \
62        return token::TYPE;                                      \
63    }
64
65#define YY_DECL int yylex(YYSTYPE* yylval_param, YYLTYPE* yylloc_param,  \
66    yyscan_t yyscanner, android::AST* const ast, android::Scope** const scope)
67
68#define YY_USER_ACTION yylloc->step(); yylloc->columns(yyleng);
69
70%}
71
72%option yylineno
73%option noyywrap
74%option nounput
75%option noinput
76%option reentrant
77%option bison-bridge
78%option bison-locations
79
80%%
81
82\/\*([^*]|\*+[^*\/])*\*+\/  {
83                                std::string str(yytext);
84
85                                // Add the lines to location (to keep it updated)
86                                yylloc->lines(std::count(str.begin(), str.end(), '\n'));
87
88                                str = StringHelper::LTrim(str, "/");
89                                bool isDoc = StringHelper::StartsWith(str, "**");
90                                str = StringHelper::LTrimAll(str, "*");
91                                str = StringHelper::RTrim(str, "/");
92                                str = StringHelper::RTrimAll(str, "*");
93
94                                yylval->str = strdup(str.c_str());
95                                return isDoc ? token::DOC_COMMENT : token::MULTILINE_COMMENT;
96                            }
97
98"//"[^\r\n]*        {
99                        ast->addUnhandledComment(
100                                new DocComment(yytext,
101                                               convertYYLoc(*yylloc, ast),
102                                               CommentType::SINGLELINE));
103                    }
104
105"enum"              { return token::ENUM; }
106"extends"           { return token::EXTENDS; }
107"generates"         { return token::GENERATES; }
108"import"            { return token::IMPORT; }
109"interface"         { return token::INTERFACE; }
110"package"           { return token::PACKAGE; }
111"safe_union"        { return token::SAFE_UNION; }
112"struct"            { return token::STRUCT; }
113"typedef"           { return token::TYPEDEF; }
114"union"             { return token::UNION; }
115"bitfield"          { yylval->templatedType = new BitFieldType(*scope); return token::TEMPLATED; }
116"vec"               { yylval->templatedType = new VectorType(*scope); return token::TEMPLATED; }
117"oneway"            { return token::ONEWAY; }
118
119"bool"              { SCALAR_TYPE(KIND_BOOL); }
120"int8_t"            { SCALAR_TYPE(KIND_INT8); }
121"uint8_t"           { SCALAR_TYPE(KIND_UINT8); }
122"int16_t"           { SCALAR_TYPE(KIND_INT16); }
123"uint16_t"          { SCALAR_TYPE(KIND_UINT16); }
124"int32_t"           { SCALAR_TYPE(KIND_INT32); }
125"uint32_t"          { SCALAR_TYPE(KIND_UINT32); }
126"int64_t"           { SCALAR_TYPE(KIND_INT64); }
127"uint64_t"          { SCALAR_TYPE(KIND_UINT64); }
128"float"             { SCALAR_TYPE(KIND_FLOAT); }
129"double"            { SCALAR_TYPE(KIND_DOUBLE); }
130
131"death_recipient"   { yylval->type = new DeathRecipientType(*scope); return token::TYPE; }
132"handle"            { yylval->type = new HandleType(*scope); return token::TYPE; }
133"memory"            { yylval->type = new MemoryType(*scope); return token::TYPE; }
134"pointer"           { yylval->type = new PointerType(*scope); return token::TYPE; }
135"string"            { yylval->type = new StringType(*scope); return token::TYPE; }
136
137"fmq_sync"          { yylval->type = new FmqType("::android::hardware", "MQDescriptorSync", *scope, "fmq_sync"); return token::TEMPLATED; }
138"fmq_unsync"        { yylval->type = new FmqType("::android::hardware", "MQDescriptorUnsync", *scope, "fmq_unsync"); return token::TEMPLATED; }
139
140"("                 { return('('); }
141")"                 { return(')'); }
142"<"                 { return('<'); }
143">"                 { return('>'); }
144"{"                 { return('{'); }
145"}"                 { return('}'); }
146"["                 { return('['); }
147"]"                 { return(']'); }
148":"                 { return(':'); }
149";"                 { return(';'); }
150","                 { return(','); }
151"."                 { return('.'); }
152"="                 { return('='); }
153"+"                 { return('+'); }
154"-"                 { return('-'); }
155"*"                 { return('*'); }
156"/"                 { return('/'); }
157"%"                 { return('%'); }
158"&"                 { return('&'); }
159"|"                 { return('|'); }
160"^"                 { return('^'); }
161"<<"                { return(token::LSHIFT); }
162">>"                { return(token::RSHIFT); }
163"&&"                { return(token::LOGICAL_AND); }
164"||"                { return(token::LOGICAL_OR);  }
165"!"                 { return('!'); }
166"~"                 { return('~'); }
167"<="                { return(token::LEQ); }
168">="                { return(token::GEQ); }
169"=="                { return(token::EQUALITY); }
170"!="                { return(token::NEQ); }
171"?"                 { return('?'); }
172"@"                 { return('@'); }
173"#"                 { return('#'); }
174
175{COMPONENT}         { yylval->str = strdup(yytext); return token::IDENTIFIER; }
176{FQNAME}            { yylval->str = strdup(yytext); return token::FQNAME; }
177
1780[xX]{H}+{IS}?      { yylval->str = strdup(yytext); return token::INTEGER; }
1790{D}+{IS}?          { yylval->str = strdup(yytext); return token::INTEGER; }
180{D}+{IS}?           { yylval->str = strdup(yytext); return token::INTEGER; }
181L?\"(\\.|[^\\"])*\" { yylval->str = strdup(yytext); return token::STRING_LITERAL; }
182
183{D}+{E}{FS}?        { yylval->str = strdup(yytext); return token::FLOAT; }
184{D}+\.{E}?{FS}?     { yylval->str = strdup(yytext); return token::FLOAT; }
185{D}*\.{D}+{E}?{FS}? { yylval->str = strdup(yytext); return token::FLOAT; }
186
187\n|\r\n             { yylloc->lines(); }
188[ \t\f\v]           { /* ignore all other whitespace */ }
189
190.                   { yylval->str = strdup(yytext); return token::UNKNOWN; }
191
192%%
193
194namespace android {
195
196status_t parseFile(AST* ast, std::unique_ptr<FILE, std::function<void(FILE *)>> file) {
197    yyscan_t scanner;
198    yylex_init(&scanner);
199
200    yyset_in(file.get(), scanner);
201
202    Scope* scopeStack = ast->getMutableRootScope();
203    int res = yy::parser(scanner, ast, &scopeStack).parse();
204
205    yylex_destroy(scanner);
206
207    if (res != 0 || ast->syntaxErrors() != 0) {
208        return UNKNOWN_ERROR;
209    }
210
211    return OK;
212}
213
214}  // namespace android
215