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|
import glob
from ply import lex
from ply import yacc
#lex stuff begins here
def scanincludes(string,inclst,curdir,incpaths):
"""Scan ctype files for #includes
Adds and returns new includes to the supplied include list
input:
string with the file contents to scan,
a include list
string with the current working dir
"""
tokens = (
"GINCLUDE",
"LINCLUDE",
#"BUNDLEINC",
"IFDEF",
"ENDIF",
)
states = (
("com","exclusive"), #comment
("ifdef","inclusive"),
)
t_ANY_ignore = " \t"
def t_begin_com(t):
r"/\*"
t.lexer.push_state("com")
def t_com_end(t):
r"\*/"
t.lexer.pop_state()
pass
def t_line_com(t):
r"//.*"
pass
def t_ANY_begin_if0(t):
r"\#if[ \t]+0"
t.lexer.push_state("com")
def t_com_endif(t):
r"\#endif"
t.lexer.pop_state()
pass
def t_com_ifdef(t):
r"\#ifdef"
t.lexer.push_state("com")
def t_IFDEF(t):
r"\#ifdef[ \t]+[a-zA-Z_][a-zA-Z0-9_]*"
t.value = t.value[6:].strip() #return the ifdef name
t.lexer.push_state("ifdef")
return t
def t_ifdef_ENDIF(t):
r"\#endif"
t.lexer.pop_state()
return t
def t_GINCLUDE(t):
r"\#[ \t]*[Ii][Nn][Cc][Ll][Uu][Dd][Ee][ \t]+<.*\.h>"
t.value = t.value[t.value.find("<"):].strip().strip("<>")
return t
def t_LINCLUDE(t):
r"\#[ \t]*[Ii][Nn][Cc][Ll][Uu][Dd][Ee][ \t]+\".*\.h\""
t.value = t.value[t.value.find('"'):].strip().strip('""')
return t
def t_BUNDLEINC(t):
r"\#[ \t]*[Ii][Nn][Cc][Ll][Uu][Dd][Ee][ \t]+<.*>"
pass
def t_ANY_error(t):
#print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
lexer = lex.lex()
#lexer.input(string)
#
#for tok in lexer:
# print(tok)
#
#YACC stuff here
def p_includes2(p):
"""
includes : includes ginc
"""
if islocalinc(p[2],curdir,incpaths):
p[1][1].add(p[2])
else:
p[1][0].add(p[2])
p[0] = p[1]
def p_lincludes(p):
"""
includes : includes linc
"""
locincpaths = incpaths + [curdir + "/"]
if islocalinc(p[2],curdir,locincpaths):
p[1][1].add(p[2])
else:
p[1][0].add(p[2])
p[0] = p[1]
def p_ifdef(p):
"""
includes : includes IFDEF includes ENDIF
| IFDEF includes ENDIF
"""
if len(p) == 5:
p[1][2] = addnewifdefs(p[1][2],{p[2] : p[3]})
p[0] = p[1]
else:
ifdef = {}
ifdef[p[1]] = p[2]
p[0] = [set(),set(),ifdef]
def p_ifdefempty(p):
"""
includes : includes IFDEF ENDIF
| IFDEF ENDIF
"""
if len(p) == 4:
p[0] = p[1]
else:
p[0] = [set(),set(),{}]
def p_ginc(p):
"includes : ginc"
globinc = set()
globinc.add(p[1])
if islocalinc(p[1], curdir, incpaths):
p[0] = [set(),globinc,{}]
else:
p[0] = [globinc,set(),{}]
def p_linc(p):
"includes : linc"
locinc = set()
locinc.add(p[1])
locincpaths = incpaths + [curdir + "/"]
if islocalinc(p[1], curdir, locincpaths):
p[0] = [set(),locinc,{}]
else:
p[0] = [locinc,set(),{}]
def p_ginclude(p):
"ginc : GINCLUDE"
p[0] = p[1]
def p_linclude(p):
"linc : LINCLUDE"
p[0] = p[1]
def p_error(p):
print("syntax error at '%s'" % p.type)
pass
yacc.yacc()
newinclst = yacc.parse(string)
if newinclst == None:
#Check if the file didn't have any includes
return(inclst)
newinclst = addnewincludes(newinclst,inclst)
return(newinclst)
def islocalinc(inc, curdir, incpaths):
"""Checks if this is a local include
Checks if the file can be found with the path that is supplied.
If not this is probably a global include and thus return False
"""
for incpath in incpaths:
#check if the path for a local inc is correct.
#The work dir is in /tmp.
if incpath[:4] == "/tmp":
if not glob.glob(incpath + inc) == []:
return True
return False
def addnewincludes(inclist1,inclist2):
"""Adds new includes to the first inclist and return it
Does a deeper scan for ifdef includes
"""
#come up with better names!!
inclist1[0] = inclist1[0] | inclist2[0]
inclist1[1] = inclist1[1] | inclist2[1]
inclist1[2] = addnewifdefs(inclist1[2],inclist2[2])
return(inclist1)
def addnewifdefs(dict1,dict2):
"""Merges the ifdef section of the inclst
Returns a new list with all of the ifdefs
"""
if dict1 == {} and dict2 == {}:
#we are done here
return(dict())
dups = dict1.keys() & dict2.keys()
if dups == set():
#no duplicates, empty set()
for name in dict2:
dict1[name] = dict2[name]
return(dict1)
for name in dups:
dict1[name][0] = dict1[name][0] | dict2[name][0]
dict1[name][1] = dict1[name][1] | dict2[name][1]
dict1[name][2] = addnewifdefs(dict1[name][2],dict2[name][2])
dict2.pop(name)
for name in dict2:
dict1[name] = dict2[name]
return(dict1)
|
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