diff options
Diffstat (limited to 'tools/aidl/aidl_language_l.l')
| -rw-r--r-- | tools/aidl/aidl_language_l.l | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/tools/aidl/aidl_language_l.l b/tools/aidl/aidl_language_l.l new file mode 100644 index 0000000..567b1cf --- /dev/null +++ b/tools/aidl/aidl_language_l.l @@ -0,0 +1,210 @@ +%{ +#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 \[{whitespace}?\] + +%% + + +\%\%\{ { 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 ','; } + + /* keywords */ +parcelable { SET_BUFFER(PARCELABLE); return PARCELABLE; } +interface { SET_BUFFER(INTERFACE); return INTERFACE; } +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; } + +{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; + } +} + |