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Add simple interpreter and let it build from de-amalgamated source code

pull/8/head
Rafal Kupiec 3 years ago
parent
commit
ef0c9a157b
2 changed files with 218 additions and 2 deletions
  1. +2
    -2
      Makefile
  2. +216
    -0
      interpreter.c

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Makefile View File

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ph7: ph7.c
cc -o ph7 ph7.c examples/ph7_intro.c -W -Wunused -Wall -I. -Ofast
ph7: api.c builtin.c compile.c constant.c hashmap.c lex.c lib.c memobj.c oo.c parse.c vfs.c vm.c interpreter.c
cc -o ph7 api.c builtin.c compile.c constant.c hashmap.c lex.c lib.c memobj.c oo.c parse.c vfs.c vm.c interpreter.c -W -Wunused -Wall -I. -Ofast

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interpreter.c View File

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/*
* Compile this file together with the ph7 engine source code to generate
* the simple PH7 interpreter executable. For example:
* gcc -W -Wall -O6 -D PH7_ENABLE_MATH_FUNC -o ph7 ph7_interp.c ph7.c
*/
/*
* The PH7 interpreter is a simple stand-alone PHP interpreter that allows
* the user to enter and execute PHP files against a PH7 engine.
* To start the ph7 program, just type "ph7" followed by the name of the PHP file
* to compile and execute. That is, the first argument is to the interpreter, the rest
* are scripts arguments, press "Enter" and the PHP code will be executed.
* If something goes wrong while processing the PHP script due to a compile-time error
* your error output (STDOUT) should display the compile-time error messages.
*
* Usage example of the ph7 interpreter:
* ph7 scripts/hello_world.php
* Running the interpreter with script arguments
* ph7 scripts/mp3_tag.php /usr/local/path/to/my_mp3s
*
* The PH7 interpreter package includes more than 70 PHP scripts to test ranging from
* simple hello world programs to XML processing, ZIP archive extracting, MP3 tag extracting,
* UUID generation, JSON encoding/decoding, INI processing, Base32 encoding/decoding and many
* more. These scripts are available in the scripts directory from the zip archive.
*/
/* $SymiscID: ph7_interp.c v1.7.4 Win7 2012-10-06 03:22 stable <devel@symisc.net> $ */
/* Make sure you have the latest release of the PH7 engine
* from:
* http://ph7.symisc.net/downloads.html
*/
#include <stdio.h>
#include <stdlib.h>
/* Make sure this header file is available.*/
#include "ph7.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"
"Simple PH7 Interpreter \n"
" http://ph7.symisc.net/\n"
"============================================================\n"
};
/*
* Display the banner,a help message and exit.
*/
static void Help(void)
{
puts(zBanner);
puts("ph7 [-h|-r|-d] path/to/php_file [script args]");
puts("\t-d: Dump PH7 byte-code instructions");
puts("\t-r: Report run-time errors");
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 */)
{
#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 */
int dump_vm = 0; /* Dump VM instructions if TRUE */
int err_report = 0; /* Report run-time errors if TRUE */
int n; /* Script arguments */
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{
/* Display a help message and exit */
Help();
}
}
if( n >= argc ){
puts("Missing PHP 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");
}
/* 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 */
);
/* 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 */
0 /* IN: Compile flags */
);
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");
}
}
/*
* Now we have our script compiled,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");
}
/* Register script agruments 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 */);
}
if( err_report ){
/* Report script run-time errors */
ph7_vm_config(pVm,PH7_VM_CONFIG_ERR_REPORT);
}
if( dump_vm ){
/* Dump PH7 byte-code instructions */
ph7_vm_dump_v2(pVm,
Output_Consumer, /* Dump consumer callback */
0
);
}
/*
* And finally, execute our program. Note that your output (STDOUT in our case)
* should display the result.
*/
ph7_vm_exec(pVm,0);
/* All done, cleanup the mess left behind.
*/
ph7_vm_release(pVm);
ph7_release(pEngine);
return 0;
}

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