class_field.c

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// SPDX-FileCopyrightText: 2021 deroad <wargio@libero.it>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include "class_field.h"
#include "class_private.h"
 
#define FIELD_ACCESS_FLAGS_SIZE 16
static const AccessFlagsReadable access_flags_list[FIELD_ACCESS_FLAGS_SIZE] = {
    { FIELD_ACCESS_FLAG_PUBLIC, "public" },
    { FIELD_ACCESS_FLAG_PRIVATE, "private" },
    { FIELD_ACCESS_FLAG_PROTECTED, "protected" },
    { FIELD_ACCESS_FLAG_STATIC, "static" },
    { FIELD_ACCESS_FLAG_FINAL, "final" },
    { FIELD_ACCESS_FLAG_VOLATILE, "volatile" },
    { FIELD_ACCESS_FLAG_TRANSIENT, "transient" },
    { FIELD_ACCESS_FLAG_SYNTHETIC, "synthetic" },
    { FIELD_ACCESS_FLAG_ENUM, "enum" },
};
 
char *java_field_access_flags_readable(const Field *field) {
    rz_return_val_if_fail(field, NULL);
    RzStrBuf *sb = NULL;
 
    for (ut32 i = 0; i < FIELD_ACCESS_FLAGS_SIZE; ++i) {
        const AccessFlagsReadable *afr = &access_flags_list[i];
        if (field->access_flags & afr->flag) {
            if (!sb) {
                sb = rz_strbuf_new(afr->readable);
                if (!sb) {
                    return NULL;
                }
            } else {
                rz_strbuf_appendf(sb, " %s", afr->readable);
            }
        }
    }
 
    return sb ? rz_strbuf_drain(sb) : NULL;
}
 
Field *java_field_new(ConstPool **pool, ut32 poolsize, RzBuffer *buf, ut64 offset) {
    Field *field = RZ_NEW0(Field);
    rz_return_val_if_fail(field, NULL);
    field->offset = offset;
    ut64 base = offset - rz_buf_tell(buf);
 
    if (!rz_buf_read_be16(buf, &field->access_flags) ||
        !rz_buf_read_be16(buf, &field->name_index) ||
        !rz_buf_read_be16(buf, &field->descriptor_index) ||
        !rz_buf_read_be16(buf, &field->attributes_count)) {
        free(field);
        return NULL;
    }
 
    if (field->attributes_count < 1) {
        return field;
    }
    field->attributes = RZ_NEWS0(Attribute *, field->attributes_count);
    if (!field->attributes) {
        free(field);
        rz_warn_if_reached();
        return NULL;
    }
 
    for (ut32 i = 0; i < field->attributes_count; ++i) {
        offset = rz_buf_tell(buf) + base;
        Attribute *attr = java_attribute_new(buf, offset);
        if (attr && java_attribute_resolve(pool, poolsize, attr, buf, false)) {
            field->attributes[i] = attr;
        } else {
            java_attribute_free(attr);
            break;
        }
    }
    return field;
}
 
void java_field_free(Field *field) {
    if (!field) {
        return;
    }
    if (field->attributes) {
        for (ut32 i = 0; i < field->attributes_count; ++i) {
            java_attribute_free(field->attributes[i]);
        }
        free(field->attributes);
    }
    free(field);
}
 
bool java_field_is_global(const Field *field) {
    ut16 flag = FIELD_ACCESS_FLAG_PUBLIC | FIELD_ACCESS_FLAG_STATIC | FIELD_ACCESS_FLAG_FINAL;
    return field && (field->access_flags & flag) == flag;
}