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-rw-r--r--libraries/classparser/src/constants.h399
1 files changed, 204 insertions, 195 deletions
diff --git a/libraries/classparser/src/constants.h b/libraries/classparser/src/constants.h
index 9c74ab20..3b6c3b7a 100644
--- a/libraries/classparser/src/constants.h
+++ b/libraries/classparser/src/constants.h
@@ -4,152 +4,161 @@
namespace java
{
+enum class constant_type_t : uint8_t
+{
+ j_hole = 0, // HACK: this is a hole in the array, because java is crazy
+ j_string_data = 1,
+ j_int = 3,
+ j_float = 4,
+ j_long = 5,
+ j_double = 6,
+ j_class = 7,
+ j_string = 8,
+ j_fieldref = 9,
+ j_methodref = 10,
+ j_interface_methodref = 11,
+ j_nameandtype = 12
+ // FIXME: missing some constant types, see https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
+};
+
+struct ref_type_t
+{
+ /**
+ * Class reference:
+ * an index within the constant pool to a UTF-8 string containing
+ * the fully qualified class name (in internal format)
+ * Used for j_class, j_fieldref, j_methodref and j_interface_methodref
+ */
+ uint16_t class_idx;
+ // used for j_fieldref, j_methodref and j_interface_methodref
+ uint16_t name_and_type_idx;
+};
+
+struct name_and_type_t
+{
+ uint16_t name_index;
+ uint16_t descriptor_index;
+};
+
class constant
{
public:
- enum type_t : uint8_t
- {
- j_hole = 0, // HACK: this is a hole in the array, because java is crazy
- j_string_data = 1,
- j_int = 3,
- j_float = 4,
- j_long = 5,
- j_double = 6,
- j_class = 7,
- j_string = 8,
- j_fieldref = 9,
- j_methodref = 10,
- j_interface_methodref = 11,
- j_nameandtype = 12
- // FIXME: missing some constant types, see https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
- } type;
+ constant_type_t type = constant_type_t::j_hole;
- constant(util::membuffer &buf)
- {
- buf.read(type);
+ constant(util::membuffer &buf)
+ {
+ buf.read(type);
- // load data depending on type
- switch (type)
- {
- case j_float:
- case j_int:
- buf.read_be(int_data); // same as float data really
- break;
- case j_double:
- case j_long:
- buf.read_be(long_data); // same as double
- break;
- case j_class:
- buf.read_be(ref_type.class_idx);
- break;
- case j_fieldref:
- case j_methodref:
- case j_interface_methodref:
- buf.read_be(ref_type.class_idx);
- buf.read_be(ref_type.name_and_type_idx);
- break;
- case j_string:
- buf.read_be(index);
- break;
- case j_string_data:
- // HACK HACK: for now, we call these UTF-8 and do no further processing.
- // Later, we should do some decoding. It's really modified UTF-8
- // * U+0000 is represented as 0xC0,0x80 invalid character
- // * any single zero byte ends the string
- // * characters above U+10000 are encoded like in CESU-8
- buf.read_jstr(str_data);
- break;
- case j_nameandtype:
- buf.read_be(name_and_type.name_index);
- buf.read_be(name_and_type.descriptor_index);
- break;
- default:
- // invalid constant type!
- throw new classfile_exception();
- }
- }
+ // load data depending on type
+ switch (type)
+ {
+ case constant_type_t::j_float:
+ buf.read_be(data.int_data);
+ break;
+ case constant_type_t::j_int:
+ buf.read_be(data.int_data); // same as float data really
+ break;
+ case constant_type_t::j_double:
+ buf.read_be(data.long_data);
+ break;
+ case constant_type_t::j_long:
+ buf.read_be(data.long_data); // same as double
+ break;
+ case constant_type_t::j_class:
+ buf.read_be(data.ref_type.class_idx);
+ break;
+ case constant_type_t::j_fieldref:
+ case constant_type_t::j_methodref:
+ case constant_type_t::j_interface_methodref:
+ buf.read_be(data.ref_type.class_idx);
+ buf.read_be(data.ref_type.name_and_type_idx);
+ break;
+ case constant_type_t::j_string:
+ buf.read_be(data.index);
+ break;
+ case constant_type_t::j_string_data:
+ // HACK HACK: for now, we call these UTF-8 and do no further processing.
+ // Later, we should do some decoding. It's really modified UTF-8
+ // * U+0000 is represented as 0xC0,0x80 invalid character
+ // * any single zero byte ends the string
+ // * characters above U+10000 are encoded like in CESU-8
+ buf.read_jstr(str_data);
+ break;
+ case constant_type_t::j_nameandtype:
+ buf.read_be(data.name_and_type.name_index);
+ buf.read_be(data.name_and_type.descriptor_index);
+ break;
+ default:
+ // invalid constant type!
+ throw new classfile_exception();
+ }
+ }
+ constant(int)
+ {
+ }
- constant(int)
- {
- type = j_hole;
- }
+ std::string toString()
+ {
+ std::ostringstream ss;
+ switch (type)
+ {
+ case constant_type_t::j_hole:
+ ss << "Fake legacy entry";
+ break;
+ case constant_type_t::j_float:
+ ss << "Float: " << data.float_data;
+ break;
+ case constant_type_t::j_double:
+ ss << "Double: " << data.double_data;
+ break;
+ case constant_type_t::j_int:
+ ss << "Int: " << data.int_data;
+ break;
+ case constant_type_t::j_long:
+ ss << "Long: " << data.long_data;
+ break;
+ case constant_type_t::j_string_data:
+ ss << "StrData: " << str_data;
+ break;
+ case constant_type_t::j_string:
+ ss << "Str: " << data.index;
+ break;
+ case constant_type_t::j_fieldref:
+ ss << "FieldRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
+ break;
+ case constant_type_t::j_methodref:
+ ss << "MethodRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
+ break;
+ case constant_type_t::j_interface_methodref:
+ ss << "IfMethodRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
+ break;
+ case constant_type_t::j_class:
+ ss << "Class: " << data.ref_type.class_idx;
+ break;
+ case constant_type_t::j_nameandtype:
+ ss << "NameAndType: " << data.name_and_type.name_index << " "
+ << data.name_and_type.descriptor_index;
+ break;
+ default:
+ ss << "Invalid entry (" << int(type) << ")";
+ break;
+ }
+ return ss.str();
+ }
- std::string toString()
- {
- std::ostringstream ss;
- switch (type)
- {
- case j_hole:
- ss << "Fake legacy entry";
- break;
- case j_float:
- ss << "Float: " << float_data;
- break;
- case j_double:
- ss << "Double: " << double_data;
- break;
- case j_int:
- ss << "Int: " << int_data;
- break;
- case j_long:
- ss << "Long: " << long_data;
- break;
- case j_string_data:
- ss << "StrData: " << str_data;
- break;
- case j_string:
- ss << "Str: " << index;
- break;
- case j_fieldref:
- ss << "FieldRef: " << ref_type.class_idx << " " << ref_type.name_and_type_idx;
- break;
- case j_methodref:
- ss << "MethodRef: " << ref_type.class_idx << " " << ref_type.name_and_type_idx;
- break;
- case j_interface_methodref:
- ss << "IfMethodRef: " << ref_type.class_idx << " " << ref_type.name_and_type_idx;
- break;
- case j_class:
- ss << "Class: " << ref_type.class_idx;
- break;
- case j_nameandtype:
- ss << "NameAndType: " << name_and_type.name_index << " "
- << name_and_type.descriptor_index;
- break;
- default:
- ss << "Invalid entry (" << int(type) << ")";
- break;
- }
- return ss.str();
- }
+ std::string str_data; /** String data in 'modified utf-8'.*/
- std::string str_data; /** String data in 'modified utf-8'.*/
- // store everything here.
- union
- {
- int32_t int_data;
- int64_t long_data;
- float float_data;
- double double_data;
- uint16_t index;
- struct
- {
- /**
- * Class reference:
- * an index within the constant pool to a UTF-8 string containing
- * the fully qualified class name (in internal format)
- * Used for j_class, j_fieldref, j_methodref and j_interface_methodref
- */
- uint16_t class_idx;
- // used for j_fieldref, j_methodref and j_interface_methodref
- uint16_t name_and_type_idx;
- } ref_type;
- struct
- {
- uint16_t name_index;
- uint16_t descriptor_index;
- } name_and_type;
- };
+ // store everything here.
+ union
+ {
+ int32_t int_data;
+ int64_t long_data;
+ float float_data;
+ double double_data;
+ uint16_t index;
+ ref_type_t ref_type;
+ name_and_type_t name_and_type;
+ } data = {0};
};
/**
@@ -159,64 +168,64 @@ public:
class constant_pool
{
public:
- /**
- * Create a pool of constants
- */
- constant_pool()
- {
- }
- /**
- * Load a java constant pool
- */
- void load(util::membuffer &buf)
- {
- // FIXME: @SANITY this should check for the end of buffer.
- uint16_t length = 0;
- buf.read_be(length);
- length--;
- const constant *last_constant = nullptr;
- while (length)
- {
- const constant &cnst = constant(buf);
- constants.push_back(cnst);
- last_constant = &constants[constants.size() - 1];
- if (last_constant->type == constant::j_double ||
- last_constant->type == constant::j_long)
- {
- // push in a fake constant to preserve indexing
- constants.push_back(constant(0));
- length -= 2;
- }
- else
- {
- length--;
- }
- }
- }
- typedef std::vector<java::constant> container_type;
- /**
- * Access constants based on jar file index numbers (index of the first element is 1)
- */
- java::constant &operator[](std::size_t constant_index)
- {
- if (constant_index == 0 || constant_index > constants.size())
- {
- throw new classfile_exception();
- }
- return constants[constant_index - 1];
- }
- ;
- container_type::const_iterator begin() const
- {
- return constants.begin();
- }
- ;
- container_type::const_iterator end() const
- {
- return constants.end();
- }
+ /**
+ * Create a pool of constants
+ */
+ constant_pool()
+ {
+ }
+ /**
+ * Load a java constant pool
+ */
+ void load(util::membuffer &buf)
+ {
+ // FIXME: @SANITY this should check for the end of buffer.
+ uint16_t length = 0;
+ buf.read_be(length);
+ length--;
+ const constant *last_constant = nullptr;
+ while (length)
+ {
+ const constant &cnst = constant(buf);
+ constants.push_back(cnst);
+ last_constant = &constants[constants.size() - 1];
+ if (last_constant->type == constant_type_t::j_double ||
+ last_constant->type == constant_type_t::j_long)
+ {
+ // push in a fake constant to preserve indexing
+ constants.push_back(constant(0));
+ length -= 2;
+ }
+ else
+ {
+ length--;
+ }
+ }
+ }
+ typedef std::vector<java::constant> container_type;
+ /**
+ * Access constants based on jar file index numbers (index of the first element is 1)
+ */
+ java::constant &operator[](std::size_t constant_index)
+ {
+ if (constant_index == 0 || constant_index > constants.size())
+ {
+ throw new classfile_exception();
+ }
+ return constants[constant_index - 1];
+ }
+ ;
+ container_type::const_iterator begin() const
+ {
+ return constants.begin();
+ }
+ ;
+ container_type::const_iterator end() const
+ {
+ return constants.end();
+ }
private:
- container_type constants;
+ container_type constants;
};
}
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