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%{
#include "aidl_language.h"
#include "aidl_language_y.h"
#include "search_path.h"
#include <string.h>
#include <stdlib.h>
extern YYSTYPE yylval;
// comment and whitespace handling
// these functions save a copy of the buffer
static void begin_extra_text(unsigned lineno, which_extra_text which);
static void append_extra_text(char* text);
static extra_text_type* get_extra_text(void); // you now own the object
// this returns
static void drop_extra_text(void);
// package handling
static void do_package_statement(const char* importText);
#define SET_BUFFER(t) \
do { \
yylval.buffer.lineno = yylineno; \
yylval.buffer.token = (t); \
yylval.buffer.data = strdup(yytext); \
yylval.buffer.extra = get_extra_text(); \
} while(0)
%}
%option yylineno
%option noyywrap
%x COPYING LONG_COMMENT
identifier [_a-zA-Z][_a-zA-Z0-9\.]*
whitespace ([ \t\n\r]+)
brackets \[{whitespace}?\]
idvalue (0|[1-9][0-9]*)
%%
\%\%\{ { begin_extra_text(yylineno, COPY_TEXT); BEGIN(COPYING); }
<COPYING>\}\%\% { BEGIN(INITIAL); }
<COPYING>.*\n { append_extra_text(yytext); }
<COPYING>.* { append_extra_text(yytext); }
<COPYING>\n+ { append_extra_text(yytext); }
\/\* { begin_extra_text(yylineno, (which_extra_text)LONG_COMMENT);
BEGIN(LONG_COMMENT); }
<LONG_COMMENT>[^*]* { append_extra_text(yytext); }
<LONG_COMMENT>\*+[^/] { append_extra_text(yytext); }
<LONG_COMMENT>\n { append_extra_text(yytext); }
<LONG_COMMENT>\**\/ { BEGIN(INITIAL); }
^{whitespace}?import{whitespace}[^ \t\r\n]+{whitespace}?; {
SET_BUFFER(IMPORT);
return IMPORT;
}
^{whitespace}?package{whitespace}[^ \t\r\n]+{whitespace}?; {
do_package_statement(yytext);
SET_BUFFER(PACKAGE);
return PACKAGE;
}
<<EOF>> { yyterminate(); }
\/\/.*\n { begin_extra_text(yylineno, SHORT_COMMENT);
append_extra_text(yytext); }
{whitespace} { /* begin_extra_text(yylineno, WHITESPACE);
append_extra_text(yytext); */ }
; { SET_BUFFER(';'); return ';'; }
\{ { SET_BUFFER('{'); return '{'; }
\} { SET_BUFFER('}'); return '}'; }
\( { SET_BUFFER('('); return '('; }
\) { SET_BUFFER(')'); return ')'; }
, { SET_BUFFER(','); return ','; }
= { SET_BUFFER('='); return '='; }
/* keywords */
parcelable { SET_BUFFER(PARCELABLE); return PARCELABLE; }
interface { SET_BUFFER(INTERFACE); return INTERFACE; }
flattenable { SET_BUFFER(FLATTENABLE); return FLATTENABLE; }
rpc { SET_BUFFER(INTERFACE); return RPC; }
in { SET_BUFFER(IN); return IN; }
out { SET_BUFFER(OUT); return OUT; }
inout { SET_BUFFER(INOUT); return INOUT; }
oneway { SET_BUFFER(ONEWAY); return ONEWAY; }
{brackets}+ { SET_BUFFER(ARRAY); return ARRAY; }
{idvalue} { SET_BUFFER(IDVALUE); return IDVALUE; }
{identifier} { SET_BUFFER(IDENTIFIER); return IDENTIFIER; }
{identifier}\<{whitespace}*{identifier}({whitespace}*,{whitespace}*{identifier})*{whitespace}*\> {
SET_BUFFER(GENERIC); return GENERIC; }
/* syntax error! */
. { printf("UNKNOWN(%s)", yytext);
yylval.buffer.lineno = yylineno;
yylval.buffer.token = IDENTIFIER;
yylval.buffer.data = strdup(yytext);
return IDENTIFIER;
}
%%
// comment and whitespace handling
// ================================================
extra_text_type* g_extraText = NULL;
extra_text_type* g_nextExtraText = NULL;
void begin_extra_text(unsigned lineno, which_extra_text which)
{
extra_text_type* text = (extra_text_type*)malloc(sizeof(extra_text_type));
text->lineno = lineno;
text->which = which;
text->data = NULL;
text->len = 0;
text->next = NULL;
if (g_nextExtraText == NULL) {
g_extraText = text;
} else {
g_nextExtraText->next = text;
}
g_nextExtraText = text;
}
void append_extra_text(char* text)
{
if (g_nextExtraText->data == NULL) {
g_nextExtraText->data = strdup(text);
g_nextExtraText->len = strlen(text);
} else {
char* orig = g_nextExtraText->data;
unsigned oldLen = g_nextExtraText->len;
unsigned len = strlen(text);
g_nextExtraText->len += len;
g_nextExtraText->data = (char*)malloc(g_nextExtraText->len+1);
memcpy(g_nextExtraText->data, orig, oldLen);
memcpy(g_nextExtraText->data+oldLen, text, len);
g_nextExtraText->data[g_nextExtraText->len] = '\0';
free(orig);
}
}
extra_text_type*
get_extra_text(void)
{
extra_text_type* result = g_extraText;
g_extraText = NULL;
g_nextExtraText = NULL;
return result;
}
void drop_extra_text(void)
{
extra_text_type* p = g_extraText;
while (p) {
extra_text_type* next = p->next;
free(p->data);
free(p);
free(next);
}
g_extraText = NULL;
g_nextExtraText = NULL;
}
// package handling
// ================================================
void do_package_statement(const char* importText)
{
if (g_currentPackage) free((void*)g_currentPackage);
g_currentPackage = parse_import_statement(importText);
}
// main parse function
// ================================================
char const* g_currentFilename = NULL;
char const* g_currentPackage = NULL;
int yyparse(void);
int parse_aidl(char const *filename)
{
yyin = fopen(filename, "r");
if (yyin) {
char const* oldFilename = g_currentFilename;
char const* oldPackage = g_currentPackage;
g_currentFilename = strdup(filename);
g_error = 0;
yylineno = 1;
int rv = yyparse();
if (g_error != 0) {
rv = g_error;
}
free((void*)g_currentFilename);
g_currentFilename = oldFilename;
if (g_currentPackage) free((void*)g_currentPackage);
g_currentPackage = oldPackage;
return rv;
} else {
fprintf(stderr, "aidl: unable to open file for read: %s\n", filename);
return 1;
}
}
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