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author | 2011-07-01 23:20:20 +0200 | |
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committer | 2011-07-01 23:20:20 +0200 | |
commit | 0f120eed0324c9277a9ada63d793ee6f0defe1fd (patch) | |
tree | bfb17b46044a812d955bc02a17cb2ffa2a1f3dd6 | |
parent | Created a verybasic automake parser (diff) | |
download | ebuildgen-0f120eed0324c9277a9ada63d793ee6f0defe1fd.tar.gz ebuildgen-0f120eed0324c9277a9ada63d793ee6f0defe1fd.tar.bz2 ebuildgen-0f120eed0324c9277a9ada63d793ee6f0defe1fd.zip |
Added a basic autoconf lex parser
-rw-r--r-- | filetypes/autoconf.py | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/filetypes/autoconf.py b/filetypes/autoconf.py new file mode 100644 index 0000000..2bbd934 --- /dev/null +++ b/filetypes/autoconf.py @@ -0,0 +1,147 @@ +from ply import lex +from ply import yacc + +def scanacfile(acfile): + + tokens = ( + "FUNC", + "FUNCOPT", #func options + "FUNCEND", + "VAR", + "ECHO", + "TEXT", + "IF", + "ELSE", + "THEN", + "IFEND", + "CASE", + "CASEEND", + ) + + states = ( + ("func", "exclusive"), + ("funcopt", "exclusive"), + ) + + def t_ANY_contline(t): + r"\\\n" + t.lexer.lineno += 1 + pass + + def t_ANY_space(t): + r"[ \t]" + pass + + def t_ANY_newline(t): + r"\n" + t.lexer.lineno += 1 + pass + + def t_INITIAL_func_FUNC(t): + r'[a-zA-Z_][a-zA-Z0-9_]*\(' + t.lexer.push_state('func') + t.value = t.value[:-1] #return name of func + return t + + def t_func_funcopt(t): + r'\[' + t.lexer.code_start = t.lexer.lexpos # Record the starting position + t.lexer.level = 1 # Initial level + t.lexer.push_state('funcopt') # Enter 'ccode' state + + # Rules for the ccode state + def t_funcopt_newcom(t): + r'\[' + t.lexer.level +=1 + + def t_funcopt_endcom(t): + r'\]' + t.lexer.level -=1 + + # If closing command, return the code fragment + if t.lexer.level == 0: + t.value = t.lexer.lexdata[t.lexer.code_start-1:t.lexer.lexpos] + t.type = "FUNCOPT" + t.lexer.lineno += t.value.count('\n') + t.lexer.pop_state() + return t + + def t_funcopt_opt(t): + r"[^\\\[\]]+" + + def t_func_FUNCOPT(t): + r"[^\\\(\)\[\],]+" + t.lexer.lineno += t.value.count('\n') + return t + + def t_func_comma(t): + r"[ \t]*,[ \t]*" + pass + + def t_func_FUNCEND(t): + r"\)" + t.lexer.pop_state() + return t + + def t_comment(t): + r"(dnl|\#).*\n" + t.lexer.lineno += t.value.count('\n') + pass + + def t_ECHO(t): + r"echo.*\n" + t.lexer.lineno += t.value.count('\n') + return t + + def t_VAR(t): + r"[a-zA-Z_][a-zA-Z0-9_]*=([^\\\n]|\\\n)*\n" + return t + + def t_IF(t): + r"if" + return t + + def t_THEN(t): + r"then" + return t + + def t_ELSE(t): + r"else" + return t + + def t_IFEND(t): + r"fi" + return t + + def t_CASE(t): + r"case.*in" + return t + + def t_CASEEND(t): + r"esac" + return t + + def t_literal(t): + r"\\[^\n]" + t.type = "TEXT" + t.value = t.value[-1] #return litral char + return t + + def t_TEXT(t): + r"[^ \t\n\(\)]+" + return t + + def t_ANY_error(t): + print("Illegal character '%s'" % t.value[0]) + t.lexer.skip(1) + + lexer = lex.lex() + + lexer.input(acfile) + for tok in lexer: + print(tok) + +file="configure.in" + +with open(file, encoding="utf-8", errors="replace") as inputfile: + scanacfile(inputfile.read()) |