I'm passing an array of character pointers to sqlite3_exec
, which takes 1 parameter and presents it as a void *
, but then I want to access it as the array of character pointers in the callback function.
char *output_params[] = {"one", "two"};
result = sqlite3_exec(db, sql_statement, callback, output_params, &zErrMsg);
....
static int callback(void *param, int argc, char **argv, char **azColName) {
// How do I access my character array?
char *output_params[2] = (char **)param;
}
How do I access it after I pass it?
This works for me:
int callback(void *param, int argc, char **argv, char **azColName)
{
const char** p = (const char **)param;
printf("%s\n", p[0]);
printf("%s\n", p[1]);
}
Here's simple program that demonstrates the concept.
#include <stdio.h>
void foo(void* in)
{
char **p = (char**)in;
printf("%s\n", p[0]);
printf("%s\n", p[1]);
}
void main(int argc, char** argv)
{
char *output_params[] = {"one", "two"};
foo(output_params);
}
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