328 lines
13 KiB
Python
Executable file
328 lines
13 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import print_function
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from __future__ import unicode_literals
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from builtins import str
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from builtins import range
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from builtins import object
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from io import open
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import os
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import argparse
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import re
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import fnmatch
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import collections
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import textwrap
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import functools
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# list files here which should not be parsed
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ignore_files = [ 'components/mdns/test_afl_fuzz_host/esp32_compat.h' ]
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# add directories here which should not be parsed
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ignore_dirs = ( 'examples' )
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# macros from here have higher priorities in case of collisions
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priority_headers = [ 'components/esp32/include/esp_err.h' ]
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err_dict = collections.defaultdict(list) #identified errors are stored here; mapped by the error code
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rev_err_dict = dict() #map of error string to error code
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unproc_list = list() #errors with unknown codes which depend on other errors
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class ErrItem(object):
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"""
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Contains information about the error:
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- name - error string
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- file - relative path inside the IDF project to the file which defines this error
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- comment - (optional) comment for the error
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- rel_str - (optional) error string which is a base for the error
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- rel_off - (optional) offset in relation to the base error
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"""
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def __init__(self, name, file, comment, rel_str = "", rel_off = 0):
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self.name = name
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self.file = file
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self.comment = comment
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self.rel_str = rel_str
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self.rel_off = rel_off
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def __str__(self):
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ret = self.name + " from " + self.file
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if (self.rel_str != ""):
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ret += " is (" + self.rel_str + " + " + str(self.rel_off) + ")"
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if self.comment != "":
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ret += " // " + self.comment
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return ret
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def __cmp__(self, other):
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if self.file in priority_headers and other.file not in priority_headers:
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return -1
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elif self.file not in priority_headers and other.file in priority_headers:
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return 1
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base = "_BASE"
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if self.file == other.file:
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if self.name.endswith(base) and not(other.name.endswith(base)):
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return 1
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elif not(self.name.endswith(base)) and other.name.endswith(base):
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return -1
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self_key = self.file + self.name
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other_key = other.file + other.name
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if self_key < other_key:
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return -1
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elif self_key > other_key:
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return 1
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else:
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return 0
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class InputError(RuntimeError):
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"""
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Represents and error on the input
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"""
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def __init__(self, p, e):
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super(InputError, self).__init__(p + ": " + e)
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def process(line, idf_path):
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"""
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Process a line of text from file idf_path (relative to IDF project).
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Fills the global list unproc_list and dictionaries err_dict, rev_err_dict
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"""
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if idf_path.endswith(".c"):
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# We would not try to include a C file
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raise InputError(idf_path, "This line should be in a header file: %s" % line)
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words = re.split(r' +', line, 2)
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# words[1] is the error name
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# words[2] is the rest of the line (value, base + value, comment)
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if len(words) < 3:
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raise InputError(idf_path, "Error at line %s" % line)
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line = ""
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todo_str = words[2]
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comment = ""
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# identify possible comment
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m = re.search(r'/\*!<(.+?(?=\*/))', todo_str)
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if m:
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comment = m.group(1).strip()
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todo_str = todo_str[:m.start()].strip() # keep just the part before the comment
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# identify possible parentheses ()
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m = re.search(r'\((.+)\)', todo_str)
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if m:
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todo_str = m.group(1) #keep what is inside the parentheses
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# identify BASE error code, e.g. from the form BASE + 0x01
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m = re.search(r'\s*(\w+)\s*\+(.+)', todo_str)
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if m:
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related = m.group(1) # BASE
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todo_str = m.group(2) # keep and process only what is after "BASE +"
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# try to match a hexadecimal number
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m = re.search(r'0x([0-9A-Fa-f]+)', todo_str)
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if m:
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num = int(m.group(1), 16)
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else:
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# Try to match a decimal number. Negative value is possible for some numbers, e.g. ESP_FAIL
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m = re.search(r'(-?[0-9]+)', todo_str)
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if m:
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num = int(m.group(1), 10)
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elif re.match(r'\w+', todo_str):
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# It is possible that there is no number, e.g. #define ERROR BASE
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related = todo_str # BASE error
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num = 0 # (BASE + 0)
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else:
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raise InputError(idf_path, "Cannot parse line %s" % line)
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try:
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related
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except NameError:
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# The value of the error is known at this moment because it do not depends on some other BASE error code
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err_dict[num].append(ErrItem(words[1], idf_path, comment))
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rev_err_dict[words[1]] = num
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else:
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# Store the information available now and compute the error code later
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unproc_list.append(ErrItem(words[1], idf_path, comment, related, num))
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def process_remaining_errors():
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"""
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Create errors which could not be processed before because the error code
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for the BASE error code wasn't known.
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This works for sure only if there is no multiple-time dependency, e.g.:
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#define BASE1 0
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#define BASE2 (BASE1 + 10)
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#define ERROR (BASE2 + 10) - ERROR will be processed successfully only if it processed later than BASE2
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"""
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for item in unproc_list:
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if item.rel_str in rev_err_dict:
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base_num = rev_err_dict[item.rel_str]
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base = err_dict[base_num][0]
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num = base_num + item.rel_off
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err_dict[num].append(ErrItem(item.name, item.file, item.comment))
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rev_err_dict[item.name] = num
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else:
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print(item.rel_str + " referenced by " + item.name + " in " + item.file + " is unknown")
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del unproc_list[:]
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def path_to_include(path):
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"""
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Process the path (relative to the IDF project) in a form which can be used
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to include in a C file. Using just the filename does not work all the
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time because some files are deeper in the tree. This approach tries to
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find an 'include' parent directory an include its subdirectories, e.g.
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"components/XY/include/esp32/file.h" will be transported into "esp32/file.h"
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So this solution works only works when the subdirectory or subdirectories
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are inside the "include" directory. Other special cases need to be handled
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here when the compiler gives an unknown header file error message.
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"""
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spl_path = path.split(os.sep)
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try:
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i = spl_path.index('include')
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except ValueError:
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# no include in the path -> use just the filename
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return os.path.basename(path)
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else:
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return os.sep.join(spl_path[i+1:]) # subdirectories and filename in "include"
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def print_warning(error_list, error_code):
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"""
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Print warning about errors with the same error code
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"""
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print("[WARNING] The following errors have the same code (%d):" % error_code)
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for e in error_list:
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print(" " + str(e))
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def max_string_width():
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max = 0
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for k in err_dict:
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for e in err_dict[k]:
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x = len(e.name)
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if x > max:
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max = x
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return max
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def generate_c_output(fin, fout):
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"""
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Writes the output to fout based on th error dictionary err_dict and
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template file fin.
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"""
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# make includes unique by using a set
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includes = set()
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for k in err_dict:
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for e in err_dict[k]:
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includes.add(path_to_include(e.file))
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# The order in a set in non-deterministic therefore it could happen that the
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# include order will be different in other machines and false difference
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# in the output file could be reported. In order to avoid this, the items
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# are sorted in a list.
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include_list = list(includes)
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include_list.sort()
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max_width = max_string_width() + 17 + 1 # length of " ERR_TBL_IT()," with spaces is 17
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max_decdig = max(len(str(k)) for k in err_dict)
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for line in fin:
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if re.match(r'@COMMENT@', line):
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fout.write("//Do not edit this file because it is autogenerated by " + os.path.basename(__file__) + "\n")
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elif re.match(r'@HEADERS@', line):
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for i in include_list:
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fout.write("#if __has_include(\"" + i + "\")\n#include \"" + i + "\"\n#endif\n")
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elif re.match(r'@ERROR_ITEMS@', line):
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last_file = ""
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for k in sorted(err_dict.keys()):
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if len(err_dict[k]) > 1:
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err_dict[k].sort(key=functools.cmp_to_key(ErrItem.__cmp__))
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print_warning(err_dict[k], k)
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for e in err_dict[k]:
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if e.file != last_file:
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last_file = e.file
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fout.write(" // %s\n" % last_file)
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table_line = (" ERR_TBL_IT(" + e.name + "), ").ljust(max_width) + "/* " + str(k).rjust(max_decdig)
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fout.write("# ifdef %s\n" % e.name)
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fout.write(table_line)
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hexnum_length = 0
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if k > 0: # negative number and zero should be only ESP_FAIL and ESP_OK
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hexnum = " 0x%x" % k
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hexnum_length = len(hexnum)
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fout.write(hexnum)
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if e.comment != "":
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if len(e.comment) < 50:
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fout.write(" %s" % e.comment)
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else:
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indent = " " * (len(table_line) + hexnum_length + 1)
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w = textwrap.wrap(e.comment, width=120, initial_indent = indent, subsequent_indent = indent)
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# this couldn't be done with initial_indent because there is no initial_width option
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fout.write(" %s" % w[0].strip())
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for i in range(1, len(w)):
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fout.write("\n%s" % w[i])
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fout.write(" */\n# endif\n")
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else:
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fout.write(line)
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def generate_rst_output(fout):
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for k in sorted(err_dict.keys()):
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v = err_dict[k][0]
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fout.write(':c:macro:`{}` '.format(v.name))
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if k > 0:
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fout.write('**(0x{:x})**'.format(k))
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else:
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fout.write('({:d})'.format(k))
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if len(v.comment) > 0:
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fout.write(': {}'.format(v.comment))
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fout.write('\n\n')
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def main():
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if 'IDF_PATH' in os.environ:
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idf_path = os.environ['IDF_PATH']
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else:
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idf_path = os.path.realpath(os.path.join(os.path.dirname(os.path.abspath(__file__)), '..'))
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parser = argparse.ArgumentParser(description='ESP32 esp_err_to_name lookup generator for esp_err_t')
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parser.add_argument('--c_input', help='Path to the esp_err_to_name.c.in template input.', default=idf_path + '/components/esp32/esp_err_to_name.c.in')
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parser.add_argument('--c_output', help='Path to the esp_err_to_name.c output.', default=idf_path + '/components/esp32/esp_err_to_name.c')
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parser.add_argument('--rst_output', help='Generate .rst output and save it into this file')
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args = parser.parse_args()
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for root, dirnames, filenames in os.walk(idf_path):
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for filename in fnmatch.filter(filenames, '*.[ch]'):
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full_path = os.path.join(root, filename)
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path_in_idf = os.path.relpath(full_path, idf_path)
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if path_in_idf in ignore_files or path_in_idf.startswith(ignore_dirs):
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continue
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with open(full_path, encoding='utf-8') as f:
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try:
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for line in f:
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# match also ESP_OK and ESP_FAIL because some of ESP_ERRs are referencing them
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if re.match(r"\s*#define\s+(ESP_ERR_|ESP_OK|ESP_FAIL)", line):
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try:
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process(line.strip(), path_in_idf)
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except InputError as e:
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print (e)
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except UnicodeDecodeError:
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raise ValueError("The encoding of {} is not Unicode.".format(path_in_idf))
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process_remaining_errors()
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if args.rst_output is not None:
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with open(args.rst_output, 'w', encoding='utf-8') as fout:
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generate_rst_output(fout)
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else:
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with open(args.c_input, 'r', encoding='utf-8') as fin, open(args.c_output, 'w', encoding='utf-8') as fout:
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generate_c_output(fin, fout)
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if __name__ == "__main__":
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main()
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