Aer Interpreter Source
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/**
* @PROJECT AerScript Interpreter
* @COPYRIGHT See COPYING in the top level directory
* @FILE sapi/cli/main.c
* @DESCRIPTION Command line SAPI for the AerScript Interpreter
* @DEVELOPERS Symisc Systems <devel@symisc.net>
* Rafal Kupiec <belliash@codingworkshop.eu.org>
*/
#include <stdio.h>
#include <stdlib.h>
/* Make sure this header file is available.*/
#include "ph7.h"
#include "ph7int.h"
/*
* Display an error message and exit.
*/
static void Fatal(const char *zMsg) {
puts(zMsg);
/* Shutdown the library */
ph7_lib_shutdown();
/* Exit immediately */
exit(0);
}
/*
* Banner.
*/
static const char zBanner[] = {
"============================================================\n"
"AerScript Interpreter \n"
" https://git.codingworkshop.eu.org/AerScript/Aer\n"
"============================================================\n"
};
/*
* Display the banner,a help message and exit.
*/
static void Help(void) {
puts(zBanner);
puts("aer [-h|-r|-d] path/to/aer_file [script args]");
puts("\t-d: Dump PH7 Engine byte-code instructions");
puts("\t-r: Report run-time errors");
puts("\t-m: Set memory limit");
puts("\t-h: Display this message an exit");
/* Exit immediately */
exit(0);
}
#ifdef __WINNT__
#include <Windows.h>
#else
/* Assume UNIX */
#include <unistd.h>
#endif
/*
* The following define is used by the UNIX built and have
* no particular meaning on windows.
*/
#ifndef STDOUT_FILENO
#define STDOUT_FILENO 1
#endif
/*
* VM output consumer callback.
* Each time the virtual machine generates some outputs,the following
* function gets called by the underlying virtual machine to consume
* the generated output.
* All this function does is redirecting the VM output to STDOUT.
* This function is registered later via a call to ph7_vm_config()
* with a configuration verb set to: PH7_VM_CONFIG_OUTPUT.
*/
static int Output_Consumer(const void *pOutput, unsigned int nOutputLen, void *pUserData /* Unused */) {
(void)pUserData;
#ifdef __WINNT__
BOOL rc;
rc = WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), pOutput, (DWORD)nOutputLen, 0, 0);
if(!rc) {
/* Abort processing */
return PH7_ABORT;
}
#else
ssize_t nWr;
nWr = write(STDOUT_FILENO, pOutput, nOutputLen);
if(nWr < 0) {
/* Abort processing */
return PH7_ABORT;
}
#endif /* __WINT__ */
/* All done,VM output was redirected to STDOUT */
return PH7_OK;
}
/*
* Main program: Compile and execute the PHP file.
*/
int main(int argc, char **argv) {
ph7 *pEngine; /* PH7 engine */
ph7_vm *pVm; /* Compiled PHP program */
char *sLimitArg = NULL; /* Memory limit */
int dump_vm = 0; /* Dump VM instructions if TRUE */
int err_report = 0; /* Report run-time errors if TRUE */
int n; /* Script arguments */
int status = 0; /* Script exit code */
int rc;
/* Process interpreter arguments first*/
for(n = 1 ; n < argc ; ++n) {
int c;
if(argv[n][0] != '-') {
/* No more interpreter arguments */
break;
}
c = argv[n][1];
if(c == 'd' || c == 'D') {
/* Dump byte-code instructions */
dump_vm = 1;
} else if(c == 'r' || c == 'R') {
/* Report run-time errors */
err_report = 1;
} else if((c == 'm' || c == 'M') && SyStrlen(argv[n]) > 2) {
sLimitArg = argv[n] + 2;
} else {
/* Display a help message and exit */
Help();
}
}
if(n >= argc) {
puts("Missing AER file to compile");
Help();
}
/* Allocate a new PH7 engine instance */
rc = ph7_init(&pEngine);
if(rc != PH7_OK) {
/*
* If the supplied memory subsystem is so sick that we are unable
* to allocate a tiny chunk of memory,there is no much we can do here.
*/
Fatal("Error while allocating a new PH7 Engine instance");
}
rc = ph7_config(pEngine, PH7_CONFIG_MEM_LIMIT, sLimitArg, 0);
if(rc != PH7_OK) {
Fatal("Error while setting memory limit");
}
/* Set an error log consumer callback. This callback [Output_Consumer()] will
* redirect all compile-time error messages to STDOUT.
*/
ph7_config(pEngine, PH7_CONFIG_ERR_OUTPUT,
Output_Consumer, /* Error log consumer */
0 /* NULL: Callback Private data */
);
/* Initialize the VM */
rc = ph7_vm_init(pEngine, &pVm, dump_vm);
if(rc != PH7_OK) {
if(rc == PH7_NOMEM) {
Fatal("Out of memory");
} else if(rc == PH7_VM_ERR) {
Fatal("VM initialization error");
}
}
/*
* Now we have our VM initialized,it's time to configure our VM.
* We will install the VM output consumer callback defined above
* so that we can consume the VM output and redirect it to STDOUT.
*/
rc = ph7_vm_config(pVm,
PH7_VM_CONFIG_OUTPUT,
Output_Consumer, /* Output Consumer callback */
0 /* Callback private data */
);
if(rc != PH7_OK) {
Fatal("Error while installing the VM output consumer callback");
}
rc = ph7_vm_config(pVm, PH7_VM_CONFIG_ERR_REPORT, 1, 0);
if(rc != PH7_OK) {
Fatal("Error while configuring the VM error reporting");
}
if(err_report) {
/* Report script run-time errors */
ph7_vm_config(pVm, PH7_VM_CONFIG_ERR_REPORT);
}
/* Now,it's time to compile our PHP file */
rc = ph7_compile_file(
pEngine, /* PH7 Engine */
argv[n], /* Path to the PHP file to compile */
&pVm /* OUT: Compiled PHP program */
);
if(rc != PH7_OK) { /* Compile error */
if(rc == PH7_IO_ERR) {
Fatal("IO error while opening the target file");
} else if(rc == PH7_VM_ERR) {
Fatal("VM initialization error");
} else {
/* Compile-time error, your output (STDOUT) should display the error messages */
Fatal("Compile error");
}
}
/* Register script arguments so we can access them later using the $argv[]
* array from the compiled PHP program.
*/
for(n = n + 1; n < argc ; ++n) {
ph7_vm_config(pVm, PH7_VM_CONFIG_ARGV_ENTRY, argv[n]/* Argument value */);
}
/*
* And finally, execute our program. Note that your output (STDOUT in our case)
* should display the result.
*/
ph7_vm_exec(pVm, &status);
if(dump_vm) {
/* Dump PH7 byte-code instructions */
ph7_vm_dump(pVm,
Output_Consumer, /* Dump consumer callback */
0
);
}
/* All done, cleanup the mess left behind.
*/
ph7_vm_release(pVm);
ph7_release(pEngine);
return status;
}