Python Results Converted To C Struct Header File

Applications Programming
1

I created python code that produce output in the form of:

moses-red-sea=1.00.03
genesis-snake=2.03
deliverance=5.0.010

I need to take this output and create a "C" header file and have it look like this:

struct {

        char *name;
        char *fixed_version;

} filename_versions[] = {

{"moses-red-sea","1.00.03"},
{"genesis-snake","2.03"},
{"deliverance","5.0.010"},
        {NULL, NULL}
};

I have looked at Python modules "struct":

https://docs.python.org/2/library/struct.html

and "ctype"

https://docs.python.org/2/library/ctypes.html

but am not sure if thats the ticket. Can someone shed some light? Thank you in advance.

2

Its just more string processing. You don't need extra modules to do the job. Whatever code writes output in this form var=value , make it write as {"var","val"}

1 Like
3

balajesuri, thank you for your response. So essentially just treat it as regular output and just redirect the output to a regular file (ex. versions.h) so it can be used by the existing C code in place correct?

4

Yup. Something of this sort:

fh_out = open('versions.h', 'w')
...
...
fh_out.write('{"deliverance","5.0.010"},\n')
...
..
fh_out.close()
5

Do not include this file in more than one C file in the same program, this would either cause mass duplication of the data, or symbol errors on compilation due to it being defined repeatedly in every file you use.

6

Awesome, I will give you an update when its all said and done. Thanks

7

Thanks for pointing me in the right direction. Here is a snippet of what I did to help anyone else out who is trying to do the samething:

dest=open('wp.h', 'a+')
dest.write('struct {\n')
dest.write('{0:>12} {1:6}\n'.format('char','*name;'))
dest.write('{0:>12} {1:16}\n\n'.format('char','*fixed_versions;'))
dest.write('} filename_versions[] = {\n\n')
   blah blah blah .....
dest.write('{0:>19}\n'.format('{NULL, NULL}'))
dest.write('{0}\n'.format('};'))
dest.close()

A sample output:

struct {

        char *name;
        char *fixed_version;

} filename_versions[] = {

{"moses-red-sea","1.00.03"},
{"genesis-snake","2.03"},
{"deliverance","5.0.010"},
        {NULL, NULL}
};
8

Here's a simplified and easier version:

dest = open('wp.h', 'a+')

dest.write(
'''
struct {

        char *name;
        char *fixed_version;

} filename_versions[] = {

{"moses-red-sea","1.00.03"},
{"genesis-snake","2.03"},
{"deliverance","5.0.010"},
        {NULL, NULL}
};
'''
);

dest.close()

Trick here is to use the triple quotes (''' ... ''') ; ain't python cool B-)