def include_once(filename, lineno, local_first):
""" Performs a file inclusion (#include) in the preprocessor.
Writes down that "filename" was included at the current file,
at line <lineno>.
The file is ignored if it was previuosly included (a warning will
be emitted though).
If local_first is True, then it will first search the file in the
local path before looking for it in the include path chain.
This is used when doing a #include "filename".
"""
filename = search_filename(filename, lineno, local_first)
if filename not in INCLUDED.keys(): # If not already included
return include_file(filename, lineno, local_first) # include it and return
# Now checks if the file has been included more than once
if len(INCLUDED[filename]) > 1:
warning(lineno, "file '%s' already included more than once, in file "
"'%s' at line %i" %
(filename, INCLUDED[filename][0][0], INCLUDED[filename][0][1]))
# Empty file (already included)
LEXER.next_token = '_ENDFILE_'
return ''
def p_define(p):
""" define : DEFINE ID params defs
"""
if ENABLED:
if p[4]:
if SPACES.match(p[4][0]):
p[4][0] = p[4][0][1:]
else:
warning(p.lineno(1), "missing whitespace after the macro name")
ID_TABLE.define(p[2], args=p[3], value=p[4], lineno=p.lineno(2),
fname=CURRENT_FILE[-1])
p[0] = []
def warning(self, msg):
""" Emits a warning and continue execution.
"""
warning(self.lex.lineno, msg)
def p_warningmsg(p):
""" warningmsg : WARNING STRING
"""
if ENABLED:
warning(p.lineno(1), p[2])
p[0] = []