flexible sed command needed to handle multiple input types - Shell Programming and Scripting

SiftinDotCom · #1 (**permalink**) 03-19-2008

Hello, I need a smart sed command that can take any of the following two as an input and give below mentioned output. As you can see, I am trying to convert some C code

INPUT:
struct abc_sample1 {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
};

typedef struct {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
} abc_sample1;

OUTPUT:

ABC_DataDesc_T abc_sample1_desc[] = {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
};

Thanks a bunch

jim mcnamara · #2 (**permalink**) 03-19-2008

This is a candidate for lex & yacc if you need to do a lot of it. .

Code:

awk ' BEGIN {found=0;
             keep=""
             abc_found=0;
             replacement=sprintf("%s\n%s\n%s\n%s\n%s\n",
                       "ABC_DataDesc_T abc_sample1_desc[] = {",
	                   "char myString[32];",
	                   "UINT16 myValue1[10];",
	                   "UINT64 myValue2;", 
	                   "};" )
              }
       {       
       if( index($0, "}")> 0 && found==1 ){       
       	   if($0 ~ /abc_sample1/) {abc_found=1} 
           if(abc_found==1) { print replacement }
           else          {printf"%s%s\n", keep, $0}
           keep=""
           found=0
           abc_found=0
           continue
       }
       if($0 ~ /struct/ ){ found=1 }
       if($0 ~ /abc_sample1/) {abc_found=1}
       if(found==1) { keep=sprintf("%s%s\n", keep, $0) }
       else         {print $0}  
       }  ' filename.c

input

Code:

struct abc_sample1 {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
};
typedef int fd;

typedef struct{
   char    customer_number [9];
   char    premise_number [7];
   char    service_number [4];
   char    bill_no [6];
   char    record_type [8];
}SORT_KEY;
typedef struct {
        SORT_KEY sort_key;
        char     service_category[4];
        char     conversion_factor [8];
        char     meter_number [10];
        char     days_of_service [3];
        char     meter_previous_read_date [11];
        char     meter_previous_read_value [10];
        char     meter_present_read_date [11];
        char     meter_present_read_value [10];
        char     meter_consumption_value [10];
        char     meter_read_type [4];
        char     meter_multiplier [8];
        char     meter_read_route [8];
        char     units_of_leakage [10];
        char     chng_out_meter_number [10];
        char     chng_out_DOS [3];
        char     chng_out_previous_read_date [11];
        char     chng_out_previous_read_value [10];
        char     chng_out_present_read_date [11];
        char     chng_out_present_read_value [10];
        char     chng_out_consumption_value [10];
        char     chng_out_read_type [4];
        char     chng_out_multiplier [8];
        char     previous_printed_date [11];
} my_urrshis_t;


typedef struct {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
} abc_sample1;

output

Code:

ABC_DataDesc_T abc_sample1_desc[] = {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
};

typedef int fd;

typedef struct{
   char    customer_number [9];
   char    premise_number [7];
   char    service_number [4];
   char    bill_no [6];
   char    record_type [8];
}SORT_KEY;
typedef struct {
        SORT_KEY sort_key;
        char     service_category[4];
        char     conversion_factor [8];
        char     meter_number [10];
        char     days_of_service [3];
        char     meter_previous_read_date [11];
        char     meter_previous_read_value [10];
        char     meter_present_read_date [11];
        char     meter_present_read_value [10];
        char     meter_consumption_value [10];
        char     meter_read_type [4];
        char     meter_multiplier [8];
        char     meter_read_route [8];
        char     units_of_leakage [10];
        char     chng_out_meter_number [10];
        char     chng_out_DOS [3];
        char     chng_out_previous_read_date [11];
        char     chng_out_previous_read_value [10];
        char     chng_out_present_read_date [11];
        char     chng_out_present_read_value [10];
        char     chng_out_consumption_value [10];
        char     chng_out_read_type [4];
        char     chng_out_multiplier [8];
        char     previous_printed_date [11];
} my_urrshis_t;


ABC_DataDesc_T abc_sample1_desc[] = {
char myString[32];
UINT16 myValue1[10];
UINT64 myValue2;
};

SiftinDotCom · #3 (**permalink**) 03-19-2008

Thanks a lot for your input and code. As I see following two inputs

Input pattern is
^.*struct $1 { multi-line structure } $2;

Output is
ABC_DataDesc_T $1/$2_desc { multi-line structure };

where
1. only one out of $1 and $2 is non-empty
2. Anything before string "struct" (including struct) is replaced by a static string ABC_DataDesc_T (sorry about the confusing name, which made it look that it depends on name of struct)
3. everything between multi-line matching braces { } need to remain intact.
4. ; at the end

I will see if I can figure out lex/yacc

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