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/********************************************************************
*
* Date: 11-May-97
*
* Purpose: Imbed PERL code in C.
*
* Notes: This code is based on the examples found in the
* Perl man pages.
*
* Compile: To compile this code you will need a starement simular too:
*
* g++ perl2.c -L/usr/lib/perl5/i586-linux/5.003/CORE
* -I/usr/lib/perl5/i586-linux/5.003/CORE
* -lperl
* -lm
*
* This program uses the C++ compiler as there seem to be problems
* With the header files on Linux when using GCC.
*
********************************************************************/
#include <stdio.h>
#include <EXTERN.h>
#include <perl.h>
/********************************************************************/
PerlInterpreter *my_perl;
void PerlInit(char **env);
int PerlEval(char *string);
void PerlEnd (void);
/********************************************************************/
main (
int argc,
char **argv,
char **env)
{
unsigned int Length;
// ... Initalise.
PerlInit(env);
// ... Some basic Perl statements
PerlEval("$a = 3;");
PerlEval("$a = $a+2;");
// ... Extract an integer perl value into the C code.
printf("a = %d\n", SvIV(perl_get_sv("a", FALSE)));
PerlEval("$a = $a+2.5;");
// ... Extract a float perl value into the C code.
printf("a = %f5.2\n", SvNV(perl_get_sv("a", FALSE)));
// ... Play with strings.
PerlEval("$a = 'rekcaH lreP rehtonA tsuJ';");
PerlEval("$a = reverse($a); ");
// ... Extract a string perl value into the C code.
printf("a = %s\n", SvPV(perl_get_sv("a", FALSE), Length));
printf("%d\n", Length);
// ... Tidy up.
PerlEnd();
}
/********************************************************************/
void PerlInit( char **env)
{
char *Embedding[] = { "", "-e", "sub _eval_ { eval $_[0] }" };
my_perl = perl_alloc();
perl_construct( my_perl );
perl_parse(my_perl, NULL, 3, Embedding, env);
}
/********************************************************************/
int PerlEval(char *string)
{
char *argv[2];
argv[0] = string;
argv[1] = NULL;
perl_call_argv("_eval_", 0, argv);
}
/********************************************************************/
void PerlEnd(void)
{
perl_destruct(my_perl);
perl_free(my_perl);
}
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