Thread: Organize words from a text file

Hi,
I am trying to create a code that will find words and organize them in a text file in the following manner:

For the following input text file:

Code:

[PARAMETER: Left Pedal]
    Mnemonic="Left Pedal";
    Operational check=1;
    Word=232;
[PARAMETER: Right Pedal]
    Mnemonic="Right Pedal";
    Operational check=1;
    Word=232;
[PARAMETER: Character 1]
    Mnemonic="Character 1";
    Operational check=1;
    Word=192;
[PARAMETER: Size]
    Mnemonic="Size";
    Decimal places=0;
    Word=192;

I would like the output to be the following:

Code:

Character 1  192
Size              192
Left Pedal     232
Right Pedal   232

So the code extracted all Mnemonic names from the input file and their word number. It proceeded to organize them in order according to their word number.

Here is what I have so far:

Code:

#include "stdafx.h"
#include <stdio.h>
#include <string.h>
 
#define MAX_LEN_LINE   300   // ?

 
int main()
{
	const char mnemonic[80] = "Mnemonic=";
	char buffer[MAX_LEN_LINE+2];
    char *buff_ptr, *find_ptr;
	fpos_t position;
    FILE *fp1, *fp2;
    size_t find_len = strlen(mnemonic);
 
    fp1 = fopen("originalfile.txt","r");
    fp2 = fopen("filecreated.txt","w");
 
    while(fgets(buffer,MAX_LEN_LINE+2,fp1))
    {
        buff_ptr = buffer;
        while ((find_ptr = strstr(buff_ptr,mnemonic)))
        {
			fgetpos (fp1, &position);
			char avoid[]=";";
			int i;
			i = strcspn (buff_ptr,avoid);
			fsetpos (fp1, &position);

			fgets ( buffer, (i-2), fp1 );

            while(buff_ptr < find_ptr)
            fputc((int)*buff_ptr++,fp2);
			fputs("\n",fp2);
            fputs(buffer,fp2);
 
            buff_ptr += find_len;
        }
        
    }
 
    fclose(fp2);
    fclose(fp1);
 
    return 0;
}

The code above was supposed to extract all parameter names from the input, but for some reason it prints the line proceeding the one where the Mnemonic is found and cuts words.

Here's my output:

Code:

    
    Operational check=    
    Operational check=1    
    Operational check=1    
    Decimal plac

Can anyone please point me in the right direction?

Code:

while ((find_ptr = strstr(buff_ptr,mnemonic)))
{
    fgetpos (fp1, &position);
    char avoid[]=";";
    int i;
    i = strcspn (buff_ptr,avoid);
    fsetpos (fp1, &position);

    fgets ( buffer, (i-2), fp1 );

As written, the two lines highlighted do nothing. The position saved by the fgetpos function gets the current file position after the line containing "Mnemonic" is read from the file. The fsetpos then does nothing because the current position has not changed at all in between calls. The fgets call then reads the next line after the "Mnemonic" line which is why you are seeing the results you mention.

Code:

        while ((find_ptr = strstr(buff_ptr,mnemonic)))
        {
			fgetpos (fp1, &position);
			char avoid[]=";";
			int i;
			i = strcspn (buff_ptr,avoid);
			fsetpos (fp1, &position);

			fgets ( buffer, (i-2), fp1 );

All of this fgetpos/fsetpos and calling fgets again is totally unnecessary.

> Mnemonic="Left Pedal";
fgets() will have stored this whole line in buffer to begin with.
Identify "Mnemonic" advance past the =" and scan up to the next "

Code:

while(fgets(buffer,MAX_LEN_LINE+2,fp1)) {
    if ( strncmp( buffer, mnemonic, find_len ) == 0 ) {
        char *p = buffer + find_len;  // p points to ="Left Pedal";
    }
}

Once you've got p set-up, there are many things you could do.
strchr() and strrchr() to find the first and last double quotes for example.



You can even do the whole thing in one rather complex sscanf call.

Code:

while(fgets(buffer,MAX_LEN_LINE+2,fp1)) {
    char field[MAX_LEN_LINE];
    if ( sscanf( buffer, "Mnemonic=\"%[^\"]", field ) == 1 ) {
        // field contains the string between ""
    }
}

Thanks Salem! I figured it would be better to acquire the PARAMETER name instead of the Mnemonic. The code looks a lot cleaner now:

Code:

while ((find_ptr = strstr(buff_ptr,mnemonic)))
        {
	        char field[MAX_LEN_LINE];
		if (sscanf(buff_ptr, "  [PARAMETER: %[^]]", field)==1)
		{
			fputs("\n",fp2);
                        fputs(field,fp2);
		}
                buff_ptr += find_len;
			
			
        }

@yohannes
organize words
Post YOUR attempt on your other thread.