diff options
Diffstat (limited to 'kconfiglib.py')
| -rw-r--r-- | kconfiglib.py | 59 |
1 files changed, 27 insertions, 32 deletions
diff --git a/kconfiglib.py b/kconfiglib.py index ca6ce8f..f0abe11 100644 --- a/kconfiglib.py +++ b/kconfiglib.py @@ -1584,7 +1584,7 @@ class Kconfig(object): self._line = s # [1:] removes the _T_IF token self._tokens = self._tokenize("if " + s)[1:] - self._tokens_i = -1 + self._tokens_i = 0 return expr_value(self._expect_expr_and_eol()) @@ -1807,7 +1807,7 @@ class Kconfig(object): # it's part of a different construct if self._reuse_tokens: self._reuse_tokens = False - self._tokens_i = -1 + self._tokens_i = 0 return True # Note: readline() returns '' over and over at EOF, which we rely on @@ -1823,7 +1823,7 @@ class Kconfig(object): self._linenr += 1 self._tokens = self._tokenize(self._line) - self._tokens_i = -1 # Token index (minus one) + self._tokens_i = 0 # Token index return True @@ -2088,22 +2088,12 @@ class Kconfig(object): return tokens - def _next_token(self): - self._tokens_i += 1 - return self._tokens[self._tokens_i] - - def _peek_token(self): - return self._tokens[self._tokens_i + 1] - - # The functions below are just _next_token() and _parse_expr() with extra - # syntax checking. Inlining _next_token() and _peek_token() into them saves - # a few % of parsing time. - # - # See the 'Intro to expressions' section for what a constant symbol is. + # Helpers for syntax checking. See the 'Intro to expressions' section for + # what a constant symbol is. def _expect_sym(self): - self._tokens_i += 1 token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is not Symbol: self._parse_error("expected symbol") @@ -2111,8 +2101,8 @@ class Kconfig(object): return token def _expect_nonconst_sym(self): - self._tokens_i += 1 token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is not Symbol or token.is_constant: self._parse_error("expected nonconstant symbol") @@ -2120,20 +2110,20 @@ class Kconfig(object): return token def _expect_nonconst_sym_and_eol(self): - self._tokens_i += 1 token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is not Symbol or token.is_constant: self._parse_error("expected nonconstant symbol") - if self._tokens[self._tokens_i + 1] is not None: + if self._tokens[self._tokens_i] is not None: self._parse_error("extra tokens at end of line") return token def _expect_str(self): - self._tokens_i += 1 token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is not str: self._parse_error("expected string") @@ -2141,13 +2131,13 @@ class Kconfig(object): return token def _expect_str_and_eol(self): - self._tokens_i += 1 token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is not str: self._parse_error("expected string") - if self._tokens[self._tokens_i + 1] is not None: + if self._tokens[self._tokens_i] is not None: self._parse_error("extra tokens at end of line") return token @@ -2155,7 +2145,7 @@ class Kconfig(object): def _expect_expr_and_eol(self): expr = self._parse_expr(True) - if self._peek_token() is not None: + if self._tokens[self._tokens_i] is not None: self._parse_error("extra tokens at end of line") return expr @@ -2163,7 +2153,7 @@ class Kconfig(object): def _check_token(self, token): # If the next token is 'token', removes it and returns True - if self._tokens[self._tokens_i + 1] is token: + if self._tokens[self._tokens_i] is token: self._tokens_i += 1 return True return False @@ -2483,9 +2473,10 @@ class Kconfig(object): # empty). This allows chaining. while self._next_line(): - t0 = self._next_token() + t0 = self._tokens[self._tokens_i] + self._tokens_i += 1 - if t0 in (_T_CONFIG, _T_MENUCONFIG): + if t0 is _T_CONFIG or t0 is _T_MENUCONFIG: # The tokenizer allocates Symbol objects for us sym = self._expect_nonconst_sym_and_eol() self.defined_syms.append(sym) @@ -2617,7 +2608,7 @@ class Kconfig(object): prev.next = prev = node elif t0 is _T_CHOICE: - if self._peek_token() is None: + if self._tokens[self._tokens_i] is None: choice = Choice() choice.direct_dep = self.n else: @@ -2703,11 +2694,12 @@ class Kconfig(object): node.dep = self.y while self._next_line(): - t0 = self._next_token() + t0 = self._tokens[self._tokens_i] + self._tokens_i += 1 if t0 in _TYPE_TOKENS: self._set_type(node, _TOKEN_TO_TYPE[t0]) - if self._peek_token() is not None: + if self._tokens[self._tokens_i] is not None: self._parse_prompt(node) elif t0 is _T_DEPENDS: @@ -2982,12 +2974,13 @@ class Kconfig(object): (AND, factor, self._parse_and_expr(transform_m)) def _parse_factor(self, transform_m): - token = self._next_token() + token = self._tokens[self._tokens_i] + self._tokens_i += 1 if token.__class__ is Symbol: # Plain symbol or relation - if self._peek_token() not in _RELATIONS: + if self._tokens[self._tokens_i] not in _RELATIONS: # Plain symbol # For conditional expressions ('depends on <expr>', @@ -3001,7 +2994,9 @@ class Kconfig(object): # # _T_EQUAL, _T_UNEQUAL, etc., deliberately have the same values as # EQUAL, UNEQUAL, etc., so we can just use the token directly - return (self._next_token(), token, self._expect_sym()) + self._tokens_i += 1 + return (self._tokens[self._tokens_i - 1], token, + self._expect_sym()) if token is _T_NOT: # token == _T_NOT == NOT |