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Full Discussion: Get struct definition
Top Forums Programming Get struct definition Post 302934104 by migurus on Wednesday 4th of February 2015 05:18:49 PM
Old 02-04-2015
Get struct definition
I have many headers with huge amount of structures in them, typical one looks like this:

Code:
$ cat a.h
struct Rec1 {
        int     f1;
        int     f2;
};
 struct Rec2 {
        char    r1;
        char    r2;
};
 struct Rec3 {
        int     f1;
        float   k1;
        float   k2;
};

To quickly look at a given definition I do this:
Code:
$ sed -n "/Rec2/,/^$/p" a.h
struct Rec2 {
        char    r1;
        char    r2;
};

I use an alias for the command and it is easy and quick, works in all systems where I need it.

Now I inherited headers with this type of definition:
Code:
$ cat b.h
typedef struct {
        int     f1;
        int     f2;
}Rec1;
typedef struct {
        char    r1;
        char    r2;
}Rec2;
typedef struct {
        int     f1;
        float   k1;
        float   k2;
}Rec3;

so my simple sed does not work anymore. Any idea how to deal with this format?

I thought of awk:
Code:
awk 'BEGIN{ n = 1; }
{
        if($0 ~ "typedef") {
                n=1;
        }
        arr[n]=$0;
        n++;
        if($0 ~ "Rec2") {
                for(i=1;i<=n;i++)
                        print arr[i];
        }
}' b.h

but I don't like it - too complex for a simple alias I can carry with me in different environments I deal with. And I am not sure awk is available everywhere. Any bash/sed based ideas?
 

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LEARN ABOUT LINUX

irsend

IRSEND(1)							   User Commands							 IRSEND(1)

NAME

       irsend - basic LIRC program to send infra-red commands

SYNOPSIS

       irsend [options] DIRECTIVE REMOTE CODE [CODE...]

DESCRIPTION

       Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such
       as TV boxes, HiFi sets, etc.

       DIRECTIVE can be:
	  SEND_ONCE	    - send CODE [CODE ...] once
	  SEND_START	    - start repeating CODE
	  SEND_STOP	    - stop repeating CODE
	  LIST		    - list configured remote items
	  SET_TRANSMITTERS  - set transmitters NUM [NUM ...]
	  SIMULATE	    - simulate IR event

       REMOTE is the name of a remote, as described in the lircd configuration file.

       CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file.

       NUM is the transmitter number of the hardware device.

       For the LIST DIRECTIVE, REMOTE and/or CODE can be empty:

	  LIST	 ""    ""   - list all configured remote names
	  LIST REMOTE  ""   - list all codes of REMOTE
	  LIST REMOTE CODE  - list only CODE of REMOTE

       The SIMULATE command only works if it has been explicitly enabled in lircd.

       -h --help
	      display usage summary

       -v --version
	      display version

       -d --device
	      use given lircd socket [/var/run/lirc/lircd]

       -a --address=host[:port]
	      connect to lircd at this address

       -# --count=n
	      send command n times

EXAMPLES

	  irsend LIST DenonTuner ""
	  irsend SEND_ONCE  DenonTuner PROG-SCAN
	  irsend SEND_ONCE  OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP
	  irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3
	  irsend SEND_STOP  OnkyoAmpli VOL-DOWN
	  irsend SET_TRANSMITTERS 1
	  irsend SET_TRANSMITTERS 1 3 4
	  irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S"

FILES

       /etc/lirc/lircd.conf
	      Default lircd configuration file.  It should contain all the remotes, their infra-red codes and the corresponding timing	and  wave-
	      form details.

DIAGNOSTICS

       If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics:
       "irsend: could not connect to socket"
       "irsend: Connection refused" (or "Permission denied").

SEE ALSO

       The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory.

       lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org.

irsend 0.9.0-pre1						   October 2010 							 IRSEND(1)
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