def merge_adjacent_comment_lines(lines):
"""Given a list of numered Fortran source code lines, i.e., pairs of the
form (n, code_line) where n is a line number and code_line is a line
of code, merge_adjacent_comment_lines() merges sequences of lines that are
indicated to be comment lines.
"""
i = 0
while i < len(lines) - 1:
lnum, line = lines[i]
if line_is_comment(line):
j = i + 1
while j < len(lines) and line_is_comment(lines[j][1]):
line += lines[j][1]
lines.pop(j)
# pop() removes a line so lines[j] now refers to the next line
lines[i] = (lnum, line)
i += 1
return lines
def separate_trailing_comments(lines: List[str]) -> List[Tuple[int, str]]:
"""Given a list of Fortran source code linesseparate_trailing_comments()
removes partial-line comments and returns the resulting list of lines.
"""
i = 0
while i < len(lines):
code_line = lines[i]
if not line_is_comment(code_line):
(code_part, comment_part) = split_trailing_comment(code_line)
if comment_part is not None:
lines[i] = code_part
i += 1
return lines
def type_of_line(line):
"""Given a line of code, type_of_line() returns a string indicating
what kind of code it is."""
if line_is_comment(line):
return "comment"
elif line_is_executable(line):
return "exec_stmt"
elif line_is_pgm_unit_end(line):
return "pgm_unit_end"
else:
if line_is_pgm_unit_start(line):
return "pgm_unit_start"
else:
return "other"
def merge_continued_lines(lines):
"""Given a list of numered Fortran source code lines, i.e., pairs of the
form (n, code_line) where n is a line number and code_line is a line
of code, merge_continued_lines() merges sequences of lines that are
indicated to be continuation lines.
"""
# Before a continuation line L1 is merged with the line L0 before it (and
# presumably the one L1 is continuing), ensure that L0 is not a comment.
# If L0 is a comment, swap L0 and L1.
chg = True
while chg:
chg = False
i = 0
while i < len(lines) - 1:
ln0, ln1 = lines[i], lines[i + 1]
if line_is_comment(ln0[1]) and line_is_continuation(ln1[1]):
# swap the code portions of lines[i] and lines[i+1]
lines[i], lines[i + 1] = (ln0[0], ln1[1]), (ln1[0], ln0[1])
chg = True
i += 1
# Merge continuation lines
chg = True
while chg:
chg = False
i = 0
while i < len(lines):
line = lines[i]
if line_is_continuation(line[1]):
assert i > 0
(prev_linenum, prev_line_code) = lines[i - 1]
curr_line_code = line[1].lstrip()[
1:
] # remove continuation char
merged_code = prev_line_code.rstrip() + curr_line_code.lstrip()
lines[i - 1] = (prev_linenum, merged_code)
lines.pop(i)
chg = True
i += 1
return lines
def separate_trailing_comments(lines: List[str]) -> List[Tuple[int, str]]:
"""Given a list of numbered Fortran source code lines, i.e., pairs of the
form (n, code_line) where n is a line number and code_line is a line
of code, separate_trailing_comments() behaves as follows: for each
pair (n, code_line) where code_line can be broken into two parts -- a
code portion code_part and a trailing comment portion comment_part, such
that code_part and comment_part are both non-empty, it replaces the
pair (n, code_line) by two pairs (n, comment_part) and (n, code_part).
The return value is the resulting list of numbered lines.
"""
i = 0
while i < len(lines):
(n, code_line) = lines[i]
if not line_is_comment(code_line):
(code_part, comment_part) = split_trailing_comment(code_line)
if comment_part is not None:
lines[i] = (n, comment_part)
lines.insert(i + 1, (n, code_part))
i += 1
return lines
def merge_continued_lines(lines):
"""Given a list of numered Fortran source code lines, i.e., pairs of the
form (n, code_line) where n is a line number and code_line is a line
of code, merge_continued_lines() merges sequences of lines that are
indicated to be continuation lines.
"""
# Before a continuation line L1 is merged with the line L0 before it (and
# presumably the one L1 is continuing), ensure that L0 is not a comment.
# If L0 is a comment, swap L0 and L1.
chg = True
swaps = set()
while chg:
chg = False
i = 0
while i < len(lines) - 1:
ln0, ln1 = lines[i], lines[i + 1]
if (line_is_comment(ln0[1]) and line_is_continuation(ln1[1])) \
or (line_is_continued(ln0[1]) and line_is_comment(ln1[1])):
if (i, i + 1) not in swaps:
# swap the code portions of lines[i] and lines[i+1]
lines[i], lines[i + 1] = (ln0[0], ln1[1]), (ln1[0], ln0[1])
swaps.add((i, i + 1)) # to prevent infinite loops
else:
# If we get here, there is a pair of adjacent lines that
# are about to go into an infinite swap sequence; one of them
# must be a comment. We delete the comment.
if line_is_comment(ln0[1]):
lines.pop(i)
else:
assert line_is_comment(ln1[1])
lines.pop(i + 1)
chg = True
i += 1
# Merge continuation lines
chg = True
while chg:
chg = False
i = 0
while i < len(lines):
line = lines[i]
if line_is_continuation(line[1]):
assert i > 0
(prev_linenum, prev_line_code) = lines[i - 1]
curr_line_code = line[1].lstrip()[
1:] # remove continuation char
merged_code = prev_line_code.rstrip() + \
" " + \
curr_line_code.lstrip() + \
"\n"
lines[i - 1] = (prev_linenum, merged_code)
lines.pop(i)
chg = True
elif line_is_continued(line[1]):
assert i < len(lines) - 1 # there must be a next line
(next_linenum, next_line_code) = lines[i + 1]
curr_line_code = line[1].rstrip()[:-1].rstrip(
) # remove continuation char
merged_code = curr_line_code + " " + next_line_code.lstrip()
lines[i] = (i, merged_code)
lines.pop(i + 1)
chg = True
i += 1
return lines
def get_comments(src_file_name: str):
curr_comment = []
curr_fn, prev_fn, curr_marker = None, None, None
in_neck = False
comments = OrderedDict()
lineno = 1
comments["$file_head"] = None
comments["$file_foot"] = None
_, f_ext = os.path.splitext(src_file_name)
with open(src_file_name, "r", encoding="latin-1") as f:
for line in f:
if line_is_comment(line) or line.strip() == "":
curr_comment.append(line)
else:
if comments["$file_head"] is None:
comments["$file_head"] = curr_comment
f_start, f_name_maybe = line_starts_subpgm(line)
if f_start:
f_name = f_name_maybe
prev_fn = curr_fn
curr_fn = f_name
if prev_fn is not None:
comments[prev_fn]["foot"] = curr_comment
comments[curr_fn] = init_comment_map(
curr_comment, [], [], OrderedDict())
curr_comment = []
in_neck = True
elif line_ends_subpgm(line):
curr_comment = []
elif line_is_continuation(line, f_ext):
lineno += 1
continue
else:
if in_neck:
comments[curr_fn]["neck"] = curr_comment
in_neck = False
curr_comment = []
else:
match = re.match(RE_INTERNAL_COMMENT_MARKER, line)
if match != None:
curr_marker = match.group(1)
curr_comment = []
elif curr_marker != None:
comments[curr_fn]["internal"][
curr_marker] = curr_comment
curr_marker = None
curr_comment = []
lineno += 1
# if there's a comment at the very end of the file, make it the foot
# comment of curr_fn
if curr_comment != [] and comments.get(curr_fn):
comments[curr_fn]["foot"] = curr_comment
comments["$file_foot"] = curr_comment
if comments["$file_head"] is None:
comments["$file_head"] = []
if comments["$file_foot"] is None:
comments["$file_foot"] = []
return comments
def discard_comments(lines):
return [
line for line in lines
if not (line_is_comment(line) or line.strip() == "")
]
