constantpool.c File Reference

#include "debugging.h"
#include <string.h>
#include <inttypes.h>
#include "readfunctions.h"
#include "constantpool.h"
#include "utf8.h"

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Functions
char	readConstantPool_Class (JavaClass *jc, cp_info *entry)
	Reads a cp_info of type CONSTANT_Class from the file. More...
char	readConstantPool_Fieldref (JavaClass *jc, cp_info *entry)
	Reads a cp_info of type CONSTANT_Fieldref from the file. More...
char	readConstantPool_Integer (JavaClass *jc, cp_info *entry)
	Reads a cp_info of type CONSTANT_Integer from the file. More...
char	readConstantPool_Long (JavaClass *jc, cp_info *entry)
	Reads a cp_info of type CONSTANT_Long from the file. More...
char	readConstantPool_Utf8 (JavaClass *jc, cp_info *entry)
	Reads a cp_info of type CONSTANT_Utf8 from the file. More...
char	readConstantPoolEntry (JavaClass *jc, cp_info *entry)
	Reads a cp_info from the file. More...
const char *	decodeTag (uint8_t tag)
	Decodes ConstantPoolTag enumeration elements. More...
void	printConstantPoolEntry (JavaClass *jc, cp_info *entry)
	Print one single constant from the constant pool. More...
void	printConstantPool (JavaClass *jc)
	Function to print all the constants from the constant pool of the class file. More...

Function Documentation

decodeTag()

const char* decodeTag

(

uint8_t

tag

)

Decodes ConstantPoolTag enumeration elements.

Parameters

uint8_t

tag - identifier of the enumeration to be translated.

Returns

const char* - pointer to char containing the decoded tag

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printConstantPool()

void printConstantPool

(

JavaClass *

jc

)

Function to print all the constants from the constant pool of the class file.

Parameters

JavaClass

*jc - pointer to JavaClass structure that must already be loaded

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printConstantPoolEntry()

void printConstantPoolEntry	(	JavaClass *	jc,
		cp_info *	entry
	)

Print one single constant from the constant pool.

Parameters

JavaClass*	jc - pointer to JavaClass structure that must already be loaded, no checks are made.
*entry	- the pointer to the constant that will be printed.

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readConstantPool_Class()

char readConstantPool_Class	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info of type CONSTANT_Class from the file.

Reads a cp_info of type CONSTANT_Class from the file Data read is written to pointer *entry. CONSTANT_Class has the same structure as CONSTANT_String, so this function could be used to read that too.

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened or failure, 1 in case of success

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readConstantPool_Fieldref()

char readConstantPool_Fieldref	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info of type CONSTANT_Fieldref from the file.

CONSTANT_Fieldref has the same internal structure as CONSTANT_Methodref CONSTANT_InterfaceMethodref and CONSTANT_NameAndType, so this function can be also used to read those.

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened or failure, 1 in case of success

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readConstantPool_Integer()

char readConstantPool_Integer	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info of type CONSTANT_Integer from the file.

CONSTANT_Integer has the same structure as CONSTANT_Float, so this function could be used to read that too.

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened 1 in case of success

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readConstantPool_Long()

char readConstantPool_Long	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info of type CONSTANT_Long from the file.

CONSTANT_Long has the same structure as CONSTANT_Double, so this function could be used to read that too.

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened or failure, 1 in case of success

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readConstantPool_Utf8()

char readConstantPool_Utf8	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info of type CONSTANT_Utf8 from the file.

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened or failure, 1 in case of success

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readConstantPoolEntry()

char readConstantPoolEntry	(	JavaClass *	jc,
		cp_info *	entry
	)

Reads a cp_info from the file.

This function identifies the structure indicated by the tag byte and selects the corresponding reading type

Parameters

JavaClass*	jc - pointer to the structure to be read.
cp_info*	entry - where the data read is written

Returns

char - retuns 0 if something unexpected happened or failure, 1 in case of success

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