How to parse a C array in a .c file using a Python script?

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I have a .c file and it contains several arrays. I need to parse a specific array which has the following name: s_InfoDay day_stat[] = { ... };

My python script has to be able to read this .c file and look for this specific array and perform the process on it. The c array has information in the following format:

s_InfoDay day_stat[] = {
//-------------------------//
//|  Rank        |   Stat   |    Level |       Stance | //
{ 0              , "ALPHA",  "NOTPRESENT", "NOTPRESENT" },
{  NA             , "LAURA",  "UNKNOWN",    "UNKNOWN" },
{  1 | LEAGUE_1   , "MANU" ,   "SECOND",    "ONGOING" },
{  2 | LEAGUE_2   , "MANU" ,   "SECOND",    "ONGOING" },
{  1 | TEAM_3 | (1<<3), "CHELSEA", " FIRST", "WINNERS" },
{  3 |(1<<3) | TEAM_3 , "CHELSEA", " FIRST", "WINNERS" },   
{  0                  , NULL     , NULL    , NULL      }  } ;
The array contains almost 500 lines and it has data in this specific format. I only want to be able to extract the values under the  |   Stat   |    Level | and able to place the in the form of an xml like structure for display purposes.

The xml tags has the following fixed format. I will have a group of 500 of these tags which have the correct values in the stat and level section in the xml tag below:

What I have tried:

Whenever I parse each line the array, I need to be able to place the string in " " under the Stat in the location of the STAT in the PrimierLeague/Information/STAT and same for the Level in the tag <Description>**Level**</Description>.

The xml format is shown below:

<League name="PrimierLeague/Information/**STAT**" TeamType="Team"    visibility="false">
    <Description>**Level**</Description>
    <Target><Property/></Target>
    <Info type="String">EMPTY</Info>
  </League >

Posted 9-Mar-17 3:21am

Member 13048699

Updated 9-Mar-17 7:19am

v2

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Member 13048699 9-Mar-17 9:30am

The xml has the follwinf format. I could not past all of it above there.
<League name="PrimierLeague/Information/**STAT**" TeamType="Team" visibility="false">
<description>**Level**
<target><property>
<Info type="String">EMPTY
</League >

CPallini 9-Mar-17 17:02pm

An alternative could be making the C program producing the XML output.

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Jochen Arndt · Accepted Answer · 2017-03-09T03:41:00

Solution 1

A possible implementation:

Declare and clear a variable indicating that the array is processed

Read file line by line:

Python

with open(path_to_file) as f:
    for line in f:
        process(line)

If array is processed
- Split the line using split(",") or use a regular expression (6.2. re — Regular expression operations — Python 3.6.1rc1 documentation[^])
- If necessary trim the extracted field strings using strip().
- Check for end of array and break if so
- Put the matched / extracted fields into your XML structure
Else check for the array definition and set indicator if found

To create the XML strings use the String Formatting Operations[^].

Posted 9-Mar-17 3:41am

Jochen Arndt

Updated 9-Mar-17 4:03am

v3

Comments

Member 13048699 9-Mar-17 9:45am

I want to be able to use python and not php here. Can you help me with a solution regarding python? I would be grateful to you.

Jochen Arndt 9-Mar-17 9:48am

Uups. I will change it. But should be the same principle.

Member 13048699 9-Mar-17 10:25am

I am not sure on what you mean by this: Declare and clear a variable indicating that the array is processed. Could you provide me with an example? Thanks in advance.

Member 13048699 9-Mar-17 10:27am

Could you please provide me with some code layout as I am relatively new to python. I have experience mostly in C++. I would be grateful to you. I am sorry if I am troubling you but I am in real need of help.

Member 13048699 9-Mar-17 10:42am

@Jochen Arndt Currently i am able to print the opened file in python code. Unsure on how to implement the process() function. May you please help me?

Member 13048699 9-Mar-17 10:53am

@Jochen Arndt Something I got in the meanwhile.

def process(line):
if line.startswith(' s_InfoDay day_stat[] = {'):
print line

with open("C:\..\test.c") as f:
for line in f:
process(line)
It just prints the line s_InfoDay day_stat[] = {. How do I perform processing on the array. Please advise me something.

Jochen Arndt 9-Mar-17 11:29am

Just think like you would do in C/C++ (untested):

isProcessing = false
with open("C:\..\test.c") as f:
for line in f:
  if isProcessing:
   isProcessing = process(line)
  elif line.startswith(' s_InfoDay day_stat[] = {'):
   isProcessing = True

The process() function must now return False when the last line is detected and True otherwise:

def process(line):
items = line.split(',')
stat = items[1].strip()
level = items[2].strip()
if stat == "NULL":
  return False
# Create XML here
return True

Member 13048699 9-Mar-17 11:42am

I dont understand why would this be in an elif statement.
elif line.startswith(' s_InfoDay day_stat[] = {'):
isProcessing = True

Jochen Arndt 9-Mar-17 11:45am

When already processing you process the array line.
If not (else), check if the beginning of the array.

It is just an example. You can do it also without a function.

Member 13048699 9-Mar-17 13:19pm

I just posted my solution below. It does not seem to work. Could you please help?