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gen_php.c
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gen_php.c
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/*
* gen_php.c - Generate Php source code from "treecc" input files.
*
* Copyright (C) 2001 Southern Storm Software, Pty Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "system.h"
#include "input.h"
#include "info.h"
#include "gen.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Declare the fields for a node type.
*/
static void DeclareFields(TreeCCContext *context,
TreeCCStream *stream, TreeCCNode *node)
{
TreeCCField *field;
field = node->fields;
while(field != 0)
{
TreeCCStreamPrint(stream, " var $%s;\n",
/*field->type, */ field->name);
field = field->next;
}
}
/*
* Declare the type definitions for a node type.
*/
static void DeclareTypeDefs(TreeCCContext *context,
TreeCCNode *node)
{
if((node->flags & TREECC_NODE_ENUM) != 0)
{
/* Define an enumerated type */
/* since PHP doesnt have enums - we are going to have to create defines...
*/
int i=1;
TreeCCStream *stream = node->source;
TreeCCNode *child;
/* TreeCCStreamPrint(stream, "public enum %s\n", node->name); */
/* TreeCCStreamPrint(stream, "{\n"); */
child = node->firstChild;
while(child != 0)
{
if((child->flags & TREECC_NODE_ENUM_VALUE) != 0)
{
TreeCCStreamPrint(stream, "define('%s_%s',%d);\n", node->name,child->name,i);
i++;
}
child = child->nextSibling;
}
TreeCCStreamPrint(stream, "\n\n");
}
}
/*
* Output the parameters for a node creation function.
*/
static int CreateParams(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, int needComma)
{
TreeCCField *field;
if(node->parent)
{
needComma = CreateParams(context, stream, node->parent, needComma);
}
field = node->fields;
while(field != 0)
{
if((field->flags & TREECC_FIELD_NOCREATE) == 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
TreeCCStreamPrint(stream, " $%s", /*field->type,*/ field->name);
needComma = 1;
}
field = field->next;
}
return needComma;
}
/*
* Output the parameters to call an inherited constructor.
*/
static int InheritParamsSource(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, int needComma)
{
TreeCCField *field;
if(node->parent)
{
needComma = InheritParamsSource(context, stream,
node->parent, needComma);
}
field = node->fields;
while(field != 0)
{
if((field->flags & TREECC_FIELD_NOCREATE) == 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
TreeCCStreamPrint(stream, "$%s", field->name);
needComma = 1;
}
field = field->next;
}
return needComma;
}
/*
* Implement the virtual methods that have implementations in a node type.
*/
static void ImplementVirtuals(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, TreeCCNode *actualNode)
{
TreeCCVirtual *virt;
TreeCCParam *param;
TreeCCOperationCase *operCase;
int declareCase, abstractCase;
TreeCCNode *tempNode;
int num, first;
int needComma;
if(node->parent)
{
ImplementVirtuals(context, stream, node->parent, actualNode);
}
virt = node->virtuals;
while(virt != 0)
{
/* Determine if we need a definition for this virtual,
and whether the definition is real or abstract */
operCase = TreeCCOperationFindCase(context, actualNode, virt->name);
if(!operCase)
{
tempNode = actualNode->parent;
abstractCase = 1;
while(tempNode != 0)
{
operCase = TreeCCOperationFindCase
(context, tempNode, virt->name);
if(operCase != 0)
{
abstractCase = 0;
break;
}
tempNode = tempNode->parent;
}
declareCase = abstractCase;
}
else
{
declareCase = 1;
abstractCase = 0;
}
if(declareCase)
{
if(abstractCase)
{
if(node == actualNode)
{
/* TreeCCStreamPrint(stream,
" public abstract %s %s(",
virt->returnType, virt->name); */
TreeCCStreamPrint(stream, " function %s(", virt->name);
}
else
{
/* Inherit the "abstract" definition from the parent */
virt = virt->next;
continue;
}
}
else
{
/*if(node == actualNode)
{
TreeCCStreamPrint(stream, " public virtual %s %s(",
virt->returnType, virt->name);
}
else
{
TreeCCStreamPrint(stream, " public override %s %s(",
virt->returnType, virt->name);
}*/
TreeCCStreamPrint(stream, " function %s(", virt->name);
}
param = virt->oper->params;
needComma = 0;
num = 1;
first = 1;
while(param != 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
if(first)
{
/* Skip the first argument, which corresponds to "this" */
if(!(param->name))
{
++num;
}
first = 0;
}
else
{
if(param->name)
{
TreeCCStreamPrint(stream, "$%s ",
/* param->type, */ param->name);
}
else
{
TreeCCStreamPrint(stream, "$P%d__",
/* param->type, */ num);
++num;
}
needComma = 1;
}
param = param->next;
}
if(!abstractCase)
{
TreeCCStreamPrint(stream, ")\n");
TreeCCStreamLine(stream, operCase->codeLinenum,
operCase->codeFilename);
TreeCCStreamPrint(stream, " {");
if(!(virt->oper->params->name) ||
!strcmp(virt->oper->params->name, "this"))
{
/* The first parameter is called "this", so we don't
need to declare it at the head of the function */
TreeCCStreamCodeIndent(stream, operCase->code, 1);
}
else
{
/* The first parameter is called something else,
so create a temporary variable to hold "this" */
/*
TreeCCStreamPrint(stream, "\n %s %s = $this;\n ",
actualNode->name,
virt->oper->params->name);
TreeCCStreamCodeIndent(stream, operCase->code, 1);
*/
TreeCCStreamPrint(stream, "\n $%s = &$this;\n ", virt->oper->params->name);
TreeCCStreamCodeIndent(stream, operCase->code, 1);
}
TreeCCStreamPrint(stream, "}\n");
TreeCCStreamFixLine(stream);
TreeCCStreamPrint(stream, "\n");
}
else
{
TreeCCStreamPrint(stream, ") {}\n\n");
}
}
virt = virt->next;
}
}
/*
* Build the type declarations for a node type.
*/
static void BuildTypeDecls(TreeCCContext *context,
TreeCCNode *node)
{
TreeCCStream *stream;
int needComma;
const char *constructorAccess;
TreeCCField *field;
int isAbstract;
/* Ignore if this is an enumerated type node */
if((node->flags & (TREECC_NODE_ENUM | TREECC_NODE_ENUM_VALUE)) != 0)
{
return;
}
/* Determine if this class has abstract virtuals */
isAbstract = TreeCCNodeHasAbstracts(context, node);
/* Output the class header */
stream = node->source;
if(node->parent)
{
/*
TreeCCStreamPrint(stream, " public new const int KIND = %d;\n\n",
node->number);
*/
TreeCCStreamPrint(stream, "define('%s_KIND',%d);\n",
node->name,node->number);
}
else
{
/*
TreeCCStreamPrint(stream, " public const int KIND = %d;\n\n",
node->number);
*/
TreeCCStreamPrint(stream, "define('%s_KIND', %d);\n",
node->name,node->number);
}
if(node->parent)
{
/* Inherit from a specified parent type */
if(isAbstract)
{
TreeCCStreamPrint(stream, "class %s extends %s\n{\n",
node->name, node->parent->name);
}
else
{
TreeCCStreamPrint(stream, "class %s extends %s\n{\n",
node->name, node->parent->name);
}
}
else
{
/* This type is the base of a class hierarchy */
if(isAbstract)
{
TreeCCStreamPrint(stream, "class %s\n{\n",
node->name);
}
else
{
TreeCCStreamPrint(stream, "class %s\n{\n", node->name);
}
/* Declare the node kind member variable */
TreeCCStreamPrint(stream, " var $kind__;\n");
/* Declare the filename and linenum fields if we are tracking lines */
if(context->track_lines)
{
TreeCCStreamPrint(stream, " var $filename__;\n");
TreeCCStreamPrint(stream, " var $linenum__;\n");
}
TreeCCStreamPrint(stream, "\n");
/* Declare the public methods for access to the above fields */
TreeCCStreamPrint(stream,
" function getKind() { return $this->kind__; }\n");
if(context->track_lines)
{
TreeCCStreamPrint(stream,
" function getFilename() { return $this->filename__; }\n");
TreeCCStreamPrint(stream,
" function getLinenum() { return $this->linenum__; }\n");
TreeCCStreamPrint(stream,
" function setFilename($filename) "
"{ $this->filename__ = $filename; }\n");
TreeCCStreamPrint(stream,
" function setLinenum($linenum) "
"{ $this->linenum__ = $linenum; }\n");
}
TreeCCStreamPrint(stream, "\n");
}
/* Declare the kind value */
/* Declare the fields */
if(node->fields)
{
DeclareFields(context, stream, node);
TreeCCStreamPrint(stream, "\n");
}
/* Declare the constructor for the node type */
if(context->reentrant)
{
/* Re-entrant systems use a factory to create the nodes.
C# doesn't have a notion of "access by members of
the namespace only". The closest is "internal", but
even that isn't quite right, so we always use "public" */
/*constructorAccess = "public "; */
constructorAccess = "";
}
else
{
/* Non-reentrant systems can construct nodes directly,
unless the node happens to be abstract, in which
case we force the constructor to be protected */
if((node->flags & TREECC_NODE_ABSTRACT) != 0)
{
/* constructorAccess = "protected "; */
constructorAccess = "";
}
else
{
/* constructorAccess = "public "; */
constructorAccess = "";
}
}
TreeCCStreamPrint(stream, " function %s%s(", constructorAccess, node->name);
if(context->reentrant)
{
/* TreeCCStreamPrint(stream, "%s state__", context->state_type); */
TreeCCStreamPrint(stream, "&$state__");
needComma = 1;
}
else
{
needComma = 0;
}
CreateParams(context, stream, node, needComma);
TreeCCStreamPrint(stream, ")\n");
TreeCCStreamPrint(stream, " {\n");
/* Call the parent class constructor */
if(node->parent)
{
TreeCCStreamPrint(stream, " parent::%s (",node->parent->name);
if(context->reentrant)
{
TreeCCStreamPrint(stream, "&$state__");
needComma = 1;
}
else
{
needComma = 0;
}
InheritParamsSource(context, stream, node->parent, needComma);
TreeCCStreamPrint(stream, ");\n");
}
/* Set the node kind */
TreeCCStreamPrint(stream, " $this->kind__ = %s_KIND;\n",node->name);
/* Track the filename and line number if necessary */
if(context->track_lines && !(node->parent))
{
if(context->reentrant)
{
TreeCCStreamPrint(stream,
" $this->filename__ = $state__->currFilename();\n");
TreeCCStreamPrint(stream,
" $this->linenum__ = $state__->currLinenum();\n");
}
else
{
TreeCCStreamPrint(stream,
" $_tmp = &%s::getState(); $this->filename__ = $_tmp->currFilename();\n",
context->state_type);
TreeCCStreamPrint(stream,
" $_tmp = &%s::getState(); $this->linenum__ = $_tmp->currLinenum();\n",
context->state_type);
}
}
/* Initialize the fields that are specific to this node type */
field = node->fields;
while(field != 0)
{
if((field->flags & TREECC_FIELD_NOCREATE) == 0)
{
TreeCCStreamPrint(stream, " $this->%s = $%s;\n",
field->name, field->name);
}
else if(field->value)
{
TreeCCStreamPrint(stream, " $this->%s = $%s;\n",
field->name, field->value);
}
field = field->next;
}
TreeCCStreamPrint(stream, " }\n\n");
/* Implement the virtual functions */
ImplementVirtuals(context, stream, node, node);
/* Declare the "isA" and "getKindName" helper methods */
if(node->parent)
{
TreeCCStreamPrint(stream, " function isA($kind)\n");
}
else
{
TreeCCStreamPrint(stream, " function isA($kind)\n");
}
TreeCCStreamPrint(stream, " {\n");
TreeCCStreamPrint(stream, " if($kind == %s_KIND)\n",node->name);
TreeCCStreamPrint(stream, " return 1;\n");
TreeCCStreamPrint(stream, " else\n");
if(node->parent)
{
TreeCCStreamPrint(stream, " return parent::isA($kind);\n");
}
else
{
TreeCCStreamPrint(stream, " return 0;\n");
}
TreeCCStreamPrint(stream, " }\n\n");
if(node->parent)
{
TreeCCStreamPrint(stream, " function getKindName()\n");
}
else
{
TreeCCStreamPrint(stream, " function getKindName()\n");
}
TreeCCStreamPrint(stream, " {\n");
TreeCCStreamPrint(stream, " return \"%s\";\n", node->name);
TreeCCStreamPrint(stream, " }\n");
/* Output the class footer */
TreeCCStreamPrint(stream, "}\n\n");
}
/*
* Declare the parameters for a factory method in the state type.
*/
static int FactoryCreateParams(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, int needComma)
{
TreeCCField *field;
if(node->parent)
{
needComma = FactoryCreateParams(context, stream,
node->parent, needComma);
}
field = node->fields;
while(field != 0)
{
if((field->flags & TREECC_FIELD_NOCREATE) == 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
TreeCCStreamPrint(stream, "$%s",
/* field->type, */ field->name);
needComma = 1;
}
field = field->next;
}
return needComma;
}
/*
* Output invocation parameters for a call to a constructor
* from within a factory method.
*/
static int FactoryInvokeParams(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, int needComma)
{
TreeCCField *field;
if(node->parent)
{
needComma = FactoryInvokeParams(context, stream,
node->parent, needComma);
}
field = node->fields;
while(field != 0)
{
if((field->flags & TREECC_FIELD_NOCREATE) == 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
TreeCCStreamPrint(stream, "$%s", field->name);
needComma = 1;
}
field = field->next;
}
return needComma;
}
/*
* Implement the create function for a node type.
*/
static void ImplementCreateFuncs(TreeCCContext *context, TreeCCNode *node)
{
TreeCCStream *stream;
/* Ignore if this is an enumerated type node */
if((node->flags & (TREECC_NODE_ENUM | TREECC_NODE_ENUM_VALUE)) != 0)
{
return;
}
/* Ignore this if it is an abstract node */
if((node->flags & TREECC_NODE_ABSTRACT) != 0)
{
return;
}
/* Determine which stream to write to */
if(context->commonSource)
{
stream = context->commonSource;
}
else
{
stream = context->sourceStream;
}
/* Output the start of the function definition */
if(context->abstract_factory)
{
TreeCCStreamPrint(stream, " function %sCreate(",
/* node->name, */ node->name);
}
else if(context->virtual_factory)
{
TreeCCStreamPrint(stream, " function %sCreate(",
/*node->name, */ node->name);
}
else
{
TreeCCStreamPrint(stream, " function %sCreate(",
/* node->name, */ node->name);
}
/* Output the parameters for the create function */
FactoryCreateParams(context, stream, node, 0);
/* Output the body of the creation function */
if(context->abstract_factory)
{
TreeCCStreamPrint(stream, ");\n");
}
else
{
TreeCCStreamPrint(stream, ")\n");
TreeCCStreamPrint(stream, " {\n");
TreeCCStreamPrint(stream, " return new %s($this", node->name);
FactoryInvokeParams(context, stream, node, 1);
TreeCCStreamPrint(stream, ");\n");
TreeCCStreamPrint(stream, " }\n\n");
}
}
/*
* Implement the state type in the source stream.
*/
static void ImplementStateType(TreeCCContext *context, TreeCCStream *stream)
{
/* Declare the class header */
if(context->reentrant && context->abstract_factory)
{
TreeCCStreamPrint(stream, "class %s\n{\n\n",
context->state_type);
}
else
{
TreeCCStreamPrint(stream, "class %s\n{\n\n",
context->state_type);
}
/* Singleton handling for non-reentrant systems */
if(!(context->reentrant))
{
/* TreeCCStreamPrint(stream, " var $state;\n\n" ,
context->state_type );*/
TreeCCStreamPrint(stream, " function &getState()\n" /*,
context->state_type*/ );
TreeCCStreamPrint(stream, " {\n");
TreeCCStreamPrint(stream, " static $state = null;\n");
TreeCCStreamPrint(stream, " if($state != null) return $state;\n");
TreeCCStreamPrint(stream, " $state = new %s();\n",
context->state_type);
TreeCCStreamPrint(stream, " return $state;\n");
TreeCCStreamPrint(stream, " }\n\n");
}
/* Implement the constructor */
/*
-- we cant do constructor too well for this - (as $state is a static var in getState..)
if(context->reentrant)
{
TreeCCStreamPrint(stream, " function %s() {}\n\n", context->state_type);
}
else
{
TreeCCStreamPrint(stream, " function %s() { $this->state__ = $this; }\n\n",
context->state_type);
}
*/
/* Implement the create functions for all of the node types */
if(context->reentrant)
{
TreeCCNodeVisitAll(context, ImplementCreateFuncs);
}
/* Implement the line number tracking methods */
if(context->track_lines)
{
TreeCCStreamPrint(stream,
" function currFilename() { return null; }\n");
TreeCCStreamPrint(stream,
" function currLinenum() { return 0; }\n\n");
}
/* Declare the end of the state type */
TreeCCStreamPrint(stream, "}\n\n");
}
/*
* Write out header information for all streams.
*/
static void WritePHPHeaders(TreeCCContext *context)
{
TreeCCStream *stream = context->streamList;
while(stream != 0)
{
if(!(stream->isHeader))
{
TreeCCStreamPrint(stream,
"<?php\n\n/* %s. Generated automatically by treecc */\n\n",
stream->embedName);
/* if(context->namespace)
{
TreeCCStreamPrint(stream, "namespace %s\n{\n\n",
context->namespace);
}
TreeCCStreamPrint(stream, "using System;\n\n");
*/
TreeCCStreamSourceTopCS(stream);
}
if(stream->defaultFile)
{
/* Reset the dirty flag if this is a default stream,
because we don't want to write out the final file
if it isn't actually written to in practice */
stream->dirty = 0;
}
stream = stream->nextStream;
}
}
/*
* Write out footer information for all streams.
*/
static void WritePHPFooters(TreeCCContext *context)
{
TreeCCStream *stream = context->streamList;
while(stream != 0)
{
if(stream->defaultFile && !(stream->dirty))
{
/* Clear the default file's contents, which we don't need */
TreeCCStreamClear(stream);
}
else if(!(stream->isHeader))
{
TreeCCStreamSourceBottom(stream);
/* if(context->namespace)
{
TreeCCStreamPrint(stream, "}\n");
}
*/
}
TreeCCStreamPrint(stream, "\n?>");
stream = stream->nextStream;
}
}
static int IsEnumType(TreeCCContext *context, const char *type)
{
TreeCCNode *node = TreeCCNodeFindByType(context, type);
if(node)
{
if((node->flags & TREECC_NODE_ENUM) != 0)
{
return 1;
}
}
return 0;
}
/*
* Generate the start declarations for a non-virtual operation.
*/
static void PHP_GenStart(TreeCCContext *context, TreeCCStream *stream,
TreeCCOperation *oper)
{
if(oper->className)
{
TreeCCStreamPrint(stream, "class %s\n{\n", oper->className);
}
else
{
TreeCCStreamPrint(stream, "class %s\n{\n", oper->name);
}
}
/*
* Generate the entry point for a non-virtual operation.
*/
static void PHPGenEntry(TreeCCContext *context, TreeCCStream *stream,
TreeCCOperation *oper, int number)
{
TreeCCParam *param;
int num;
int needComma;
/*
if(number != -1)
{
TreeCCStreamPrint(stream, " private static %s %s_split_%d__(",
oper->returnType, oper->name, number);
}
else
{
TreeCCStreamPrint(stream, " public static %s %s(",
oper->returnType, oper->name);
}
*/
if(number != -1)
{
TreeCCStreamPrint(stream, " function %s_split_%d__(&",
oper->name, number);
}
else
{
TreeCCStreamPrint(stream, " function %s(&", oper->name);
}
param = oper->params;
num = 1;
needComma = 0;
while(param != 0)
{
if(needComma)
{
TreeCCStreamPrint(stream, ", ");
}
/*
if(context->language == TREECC_LANG_CSHARP)
{
TreeCCStreamPrint(stream, "%s ", param->type);
}
else
{
TreeCCStreamPrint(stream, "%s ", ConvertType(context, param->type));
}
*/
if(param->name)
{
TreeCCStreamPrint(stream, "$%s", param->name);
}
else
{
TreeCCStreamPrint(stream, "$P%d__", num);
++num;
}
if((param->flags & TREECC_PARAM_TRIGGER) != 0)
{
if(!IsEnumType(context, param->type))
{
TreeCCStreamPrint(stream, "__");
}
}
needComma = 1;
param = param->next;
}
TreeCCStreamPrint(stream, ")\n");
TreeCCStreamPrint(stream, " {\n");
}
/*
* Generate the entry point for a non-virtual operation.
*/
static void PHP_GenEntry(TreeCCContext *context, TreeCCStream *stream,
TreeCCOperation *oper)
{
PHPGenEntry(context, stream, oper, -1);
}
/*
* Generate the entry point for a split-out function.
*/
static void PHP_GenSplitEntry(TreeCCContext *context, TreeCCStream *stream,
TreeCCOperation *oper, int number)
{
PHPGenEntry(context, stream, oper, number);
}
/*
* Output TAB's for a specific level of indenting.
*/
static void Indent(TreeCCStream *stream, int indent)
{
while(indent >= 4)
{
TreeCCStreamPrint(stream, " ");
indent -= 4;
}
if(indent == 1)
{
TreeCCStreamPrint(stream, " ");
}
else if(indent == 2)
{
TreeCCStreamPrint(stream, " ");
}
else if(indent == 3)
{
TreeCCStreamPrint(stream, " ");
}
}
/*
* Generate the head of a "switch" statement.
*/
static void PHP_GenSwitchHead(TreeCCContext *context, TreeCCStream *stream,
char *paramName, int level, int isEnum)
{
Indent(stream, level * 2 + 2);
if(isEnum)
{
TreeCCStreamPrint(stream, "switch($%s)\n", paramName);
}
else
{
TreeCCStreamPrint(stream, "switch($%s__->getKind())\n", paramName);
}
Indent(stream, level * 2 + 2);
TreeCCStreamPrint(stream, "{\n");
}
/*
* Generate a selector for a "switch" case.
*/
static void PHP_GenSelector(TreeCCContext *context, TreeCCStream *stream,
TreeCCNode *node, int level)
{
if((node->flags & TREECC_NODE_ENUM_VALUE) != 0)
{
Indent(stream, level * 2 + 3);
TreeCCStreamPrint(stream, "case %s_%s:\n",
node->parent->name, node->name);
}
else if((node->flags & TREECC_NODE_ENUM) == 0)
{
Indent(stream, level * 2 + 3);
TreeCCStreamPrint(stream, "case %s_KIND:\n", node->name);
}
}
/*
* Terminate the selectors and begin the body of a "switch" case.
*/
static void PHP_GenEndSelectors(TreeCCContext *context, TreeCCStream *stream,
int level)
{
Indent(stream, level * 2 + 3);
TreeCCStreamPrint(stream, "{\n");
}
/*
* Generate the code for a case within a function.
*/
static void PHP_GenCaseFunc(TreeCCContext *context, TreeCCStream *stream,
TreeCCOperationCase *operCase, int number)
{
TreeCCParam *param;
TreeCCTrigger *trigger;
int num;
int needComma;
char *type;
/* Output the header for the function */
/*TreeCCStreamPrint(stream, " private static %s %s_%d__(",
ConvertType(context, operCase->oper->returnType),
operCase->oper->name, number);
*/