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author | Richard Purdie <richard@openedhand.com> | 2007-11-17 22:21:42 +0000 |
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committer | Richard Purdie <richard@openedhand.com> | 2007-11-17 22:21:42 +0000 |
commit | 636e360eea3a0faadd669a409b76fae372c6c38b (patch) | |
tree | 19efa4ed475df669bbbbfac8c69a76415d1a8030 /bitbake/lib/bb/parse/parse_c/bitbakescanner.l | |
parent | 688eca78c088dc45957dde6cc74204f5ac83e5ca (diff) | |
download | openembedded-core-636e360eea3a0faadd669a409b76fae372c6c38b.tar.gz openembedded-core-636e360eea3a0faadd669a409b76fae372c6c38b.tar.bz2 openembedded-core-636e360eea3a0faadd669a409b76fae372c6c38b.tar.xz openembedded-core-636e360eea3a0faadd669a409b76fae372c6c38b.zip |
Remove broken c based parser code
git-svn-id: https://svn.o-hand.com/repos/poky/trunk@3192 311d38ba-8fff-0310-9ca6-ca027cbcb966
Diffstat (limited to 'bitbake/lib/bb/parse/parse_c/bitbakescanner.l')
-rw-r--r-- | bitbake/lib/bb/parse/parse_c/bitbakescanner.l | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/bitbake/lib/bb/parse/parse_c/bitbakescanner.l b/bitbake/lib/bb/parse/parse_c/bitbakescanner.l deleted file mode 100644 index b6592f28e..000000000 --- a/bitbake/lib/bb/parse/parse_c/bitbakescanner.l +++ /dev/null @@ -1,319 +0,0 @@ -/* bbf.flex - - written by Marc Singer - 6 January 2005 - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - USA. - - DESCRIPTION - ----------- - - flex lexer specification for a BitBake input file parser. - - Unfortunately, flex doesn't welcome comments within the rule sets. - I say unfortunately because this lexer is unreasonably complex and - comments would make the code much easier to comprehend. - - The BitBake grammar is not regular. In order to interpret all - of the available input files, the lexer maintains much state as it - parses. There are places where this lexer will emit tokens that - are invalid. The parser will tend to catch these. - - The lexer requires C++ at the moment. The only reason for this has - to do with a very small amount of managed state. Producing a C - lexer should be a reasonably easy task as long as the %reentrant - option is used. - - - NOTES - ----- - - o RVALUES. There are three kinds of RVALUES. There are unquoted - values, double quote enclosed strings, and single quote - strings. Quoted strings may contain unescaped quotes (of either - type), *and* any type may span more than one line by using a - continuation '\' at the end of the line. This requires us to - recognize all types of values with a single expression. - Moreover, the only reason to quote a value is to include - trailing or leading whitespace. Whitespace within a value is - preserved, ugh. - - o CLASSES. C_ patterns define classes. Classes ought not include - a repitition operator, instead letting the reference to the class - define the repitition count. - - C_SS - symbol start - C_SB - symbol body - C_SP - whitespace - -*/ - -%option never-interactive -%option yylineno -%option noyywrap -%option reentrant stack - - -%{ - -#include "token.h" -#include "lexer.h" -#include "bitbakeparser.h" -#include <ctype.h> - -extern void *bbparseAlloc(void *(*mallocProc)(size_t)); -extern void bbparseFree(void *p, void (*freeProc)(void*)); -extern void *bbparseAlloc(void *(*mallocProc)(size_t)); -extern void *bbparse(void*, int, token_t, lex_t*); -extern void bbparseTrace(FILE *TraceFILE, char *zTracePrompt); - -//static const char* rgbInput; -//static size_t cbInput; - -extern "C" { - -int lineError; -int errorParse; - -enum { - errorNone = 0, - errorUnexpectedInput, - errorUnsupportedFeature, -}; - -} - -#define YY_EXTRA_TYPE lex_t* - - /* Read from buffer */ -#define YY_INPUT(buf,result,max_size) \ - { yyextra->input(buf, &result, max_size); } - -//#define YY_DECL static size_t yylex () - -#define ERROR(e) \ - do { lineError = yylineno; errorParse = e; yyterminate (); } while (0) - -static const char* fixup_escapes (const char* sz); - -%} - - -C_SP [ \t] -COMMENT #.*\n -OP_ASSIGN "=" -OP_PREDOT ".=" -OP_POSTDOT "=." -OP_IMMEDIATE ":=" -OP_PREPEND "=+" -OP_APPEND "+=" -OP_COND "?=" -B_OPEN "{" -B_CLOSE "}" - -K_ADDTASK "addtask" -K_ADDHANDLER "addhandler" -K_AFTER "after" -K_BEFORE "before" -K_DEF "def" -K_INCLUDE "include" -K_REQUIRE "require" -K_INHERIT "inherit" -K_PYTHON "python" -K_FAKEROOT "fakeroot" -K_EXPORT "export" -K_EXPORT_FUNC "EXPORT_FUNCTIONS" - -STRING \"([^\n\r]|"\\\n")*\" -SSTRING \'([^\n\r]|"\\\n")*\' -VALUE ([^'" \t\n])|([^'" \t\n]([^\n]|(\\\n))*[^'" \t\n]) - -C_SS [a-zA-Z_] -C_SB [a-zA-Z0-9_+-./] -REF $\{{C_SS}{C_SB}*\} -SYMBOL {C_SS}{C_SB}* -VARIABLE $?{C_SS}({C_SB}*|{REF})*(\[[a-zA-Z0-9_]*\])? -FILENAME ([a-zA-Z_./]|{REF})(([-+a-zA-Z0-9_./]*)|{REF})* - -PROC \({C_SP}*\) - -%s S_DEF -%s S_DEF_ARGS -%s S_DEF_BODY -%s S_FUNC -%s S_INCLUDE -%s S_INHERIT -%s S_REQUIRE -%s S_PROC -%s S_RVALUE -%s S_TASK - -%% - -{OP_APPEND} { BEGIN S_RVALUE; - yyextra->accept (T_OP_APPEND); } -{OP_PREPEND} { BEGIN S_RVALUE; - yyextra->accept (T_OP_PREPEND); } -{OP_IMMEDIATE} { BEGIN S_RVALUE; - yyextra->accept (T_OP_IMMEDIATE); } -{OP_ASSIGN} { BEGIN S_RVALUE; - yyextra->accept (T_OP_ASSIGN); } -{OP_PREDOT} { BEGIN S_RVALUE; - yyextra->accept (T_OP_PREDOT); } -{OP_POSTDOT} { BEGIN S_RVALUE; - yyextra->accept (T_OP_POSTDOT); } -{OP_COND} { BEGIN S_RVALUE; - yyextra->accept (T_OP_COND); } - -<S_RVALUE>\\\n{C_SP}* { } -<S_RVALUE>{STRING} { BEGIN INITIAL; - size_t cb = yyleng; - while (cb && isspace (yytext[cb - 1])) - --cb; - yytext[cb - 1] = 0; - yyextra->accept (T_STRING, yytext + 1); } -<S_RVALUE>{SSTRING} { BEGIN INITIAL; - size_t cb = yyleng; - while (cb && isspace (yytext[cb - 1])) - --cb; - yytext[cb - 1] = 0; - yyextra->accept (T_STRING, yytext + 1); } - -<S_RVALUE>{VALUE} { ERROR (errorUnexpectedInput); } -<S_RVALUE>{C_SP}*\n+ { BEGIN INITIAL; - yyextra->accept (T_STRING, NULL); } - -{K_INCLUDE} { BEGIN S_INCLUDE; - yyextra->accept (T_INCLUDE); } -{K_REQUIRE} { BEGIN S_REQUIRE; - yyextra->accept (T_REQUIRE); } -{K_INHERIT} { BEGIN S_INHERIT; - yyextra->accept (T_INHERIT); } -{K_ADDTASK} { BEGIN S_TASK; - yyextra->accept (T_ADDTASK); } -{K_ADDHANDLER} { yyextra->accept (T_ADDHANDLER); } -{K_EXPORT_FUNC} { BEGIN S_FUNC; - yyextra->accept (T_EXPORT_FUNC); } -<S_TASK>{K_BEFORE} { yyextra->accept (T_BEFORE); } -<S_TASK>{K_AFTER} { yyextra->accept (T_AFTER); } -<INITIAL>{K_EXPORT} { yyextra->accept (T_EXPORT); } - -<INITIAL>{K_FAKEROOT} { yyextra->accept (T_FAKEROOT); } -<INITIAL>{K_PYTHON} { yyextra->accept (T_PYTHON); } -{PROC}{C_SP}*{B_OPEN}{C_SP}*\n* { BEGIN S_PROC; - yyextra->accept (T_PROC_OPEN); } -<S_PROC>{B_CLOSE}{C_SP}*\n* { BEGIN INITIAL; - yyextra->accept (T_PROC_CLOSE); } -<S_PROC>([^}][^\n]*)?\n* { yyextra->accept (T_PROC_BODY, yytext); } - -{K_DEF} { BEGIN S_DEF; } -<S_DEF>{SYMBOL} { BEGIN S_DEF_ARGS; - yyextra->accept (T_SYMBOL, yytext); } -<S_DEF_ARGS>[^\n:]*: { yyextra->accept (T_DEF_ARGS, yytext); } -<S_DEF_ARGS>{C_SP}*\n { BEGIN S_DEF_BODY; } -<S_DEF_BODY>{C_SP}+[^\n]*\n { yyextra->accept (T_DEF_BODY, yytext); } -<S_DEF_BODY>\n { yyextra->accept (T_DEF_BODY, yytext); } -<S_DEF_BODY>. { BEGIN INITIAL; unput (yytext[0]); } - -{COMMENT} { } - -<INITIAL>{SYMBOL} { yyextra->accept (T_SYMBOL, yytext); } -<INITIAL>{VARIABLE} { yyextra->accept (T_VARIABLE, yytext); } - -<S_TASK>{SYMBOL} { yyextra->accept (T_TSYMBOL, yytext); } -<S_FUNC>{SYMBOL} { yyextra->accept (T_FSYMBOL, yytext); } -<S_INHERIT>{SYMBOL} { yyextra->accept (T_ISYMBOL, yytext); } -<S_INCLUDE>{FILENAME} { BEGIN INITIAL; - yyextra->accept (T_ISYMBOL, yytext); } -<S_REQUIRE>{FILENAME} { BEGIN INITIAL; - yyextra->accept (T_ISYMBOL, yytext); } -<S_TASK>\n { BEGIN INITIAL; } -<S_FUNC>\n { BEGIN INITIAL; } -<S_INHERIT>\n { BEGIN INITIAL; } - -[ \t\r\n] /* Insignificant whitespace */ - -. { ERROR (errorUnexpectedInput); } - - /* Check for premature termination */ -<<EOF>> { return T_EOF; } - -%% - -void lex_t::accept (int token, const char* sz) -{ - token_t t; - memset (&t, 0, sizeof (t)); - t.copyString(sz); - - /* tell lemon to parse the token */ - parse (parser, token, t, this); -} - -void lex_t::input (char *buf, int *result, int max_size) -{ - /* printf("lex_t::input %p %d\n", buf, max_size); */ - *result = fread(buf, 1, max_size, file); - /* printf("lex_t::input result %d\n", *result); */ -} - -int lex_t::line ()const -{ - /* printf("lex_t::line\n"); */ - return yyget_lineno (scanner); -} - - -extern "C" { - - void parse (FILE* file, char* name, PyObject* data, int config) - { - /* printf("parse bbparseAlloc\n"); */ - void* parser = bbparseAlloc (malloc); - yyscan_t scanner; - lex_t lex; - - /* printf("parse yylex_init\n"); */ - yylex_init (&scanner); - - lex.parser = parser; - lex.scanner = scanner; - lex.file = file; - lex.name = name; - lex.data = data; - lex.config = config; - lex.parse = bbparse; - /*printf("parse yyset_extra\n"); */ - yyset_extra (&lex, scanner); - - /* printf("parse yylex\n"); */ - int result = yylex (scanner); - - /* printf("parse result %d\n", result); */ - - lex.accept (0); - /* printf("parse lex.accept\n"); */ - bbparseTrace (NULL, NULL); - /* printf("parse bbparseTrace\n"); */ - - if (result != T_EOF) - printf ("premature end of file\n"); - - yylex_destroy (scanner); - bbparseFree (parser, free); - } - -} |