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//
// csvsplit.c: simple CSV splitting (csvForeach), useful utility functions
// Now one function that strdup()s it's strings, another that
// modifies them in place.
//
// (C) Duncan C. White, May 2017-March 2023
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include "csvsplit.h"
// csvForeach( csvstring, &foreach_callback, (void *)extravalue );
// Split csvstring (modifying it in place) into each comma-separated field,
// calling the foreach calback for each comma-separated field, passing the
// value and extravalue as parameters to it. It doesn't deal
// with commas in quoted strings, however.
//
void csvForeach( char *csvstring, csvforeachcb cb, void *extra )
{
char *start = csvstring;
for(;;)
{
char *comma=strchr( start, ',' );
if( comma != NULL )
{
// found the first comma after start
*comma = '\0';
}
//printf( "debug: csvForeach: found value %s\n", start );
(*cb)( start, extra );
if( comma == NULL ) break;
// move start to one beyond where comma was..
start = comma+1;
}
}
// csvForeachstrdup( csvstring, &foreach_callback, (void *)extravalue );
// Split csvstring into each comma-separated field, duplicating it
// in order to modify the copy, calling the foreach calback for each
// comma-separated field it finds, passing the value and extravalue as
// parameters to it. It doesn't deal with commas in quoted strings, however.
//
void csvForeachstrdup( char *csvstring, csvforeachcb cb, void *extra )
{
// make a modifiable copy..
char *copy = strdup( csvstring );
assert( copy != NULL );
csvForeach( copy, cb, extra );
// don't forget to..
free( copy );
}
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