From b6d455a02bd338e9dc0faa09d4d8177ecd8d569a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= Date: Sun, 10 Apr 2016 15:53:05 +0200 Subject: NOISSUE reorganize and document libraries --- libraries/pack200/src/bytes.h | 286 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 286 insertions(+) create mode 100644 libraries/pack200/src/bytes.h (limited to 'libraries/pack200/src/bytes.h') diff --git a/libraries/pack200/src/bytes.h b/libraries/pack200/src/bytes.h new file mode 100644 index 00000000..b116efda --- /dev/null +++ b/libraries/pack200/src/bytes.h @@ -0,0 +1,286 @@ +/* + * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +#pragma once + +struct bytes +{ + int8_t *ptr; + size_t len; + int8_t *limit() + { + return ptr + len; + } + + void set(int8_t *ptr_, size_t len_) + { + ptr = ptr_; + len = len_; + } + void set(const char *str) + { + ptr = (int8_t *)str; + len = strlen(str); + } + bool inBounds(const void *p); // p in [ptr, limit) + void malloc(size_t len_); + void realloc(size_t len_); + void free(); + void copyFrom(const void *ptr_, size_t len_, size_t offset = 0); + void saveFrom(const void *ptr_, size_t len_); + void saveFrom(const char *str) + { + saveFrom(str, strlen(str)); + } + void copyFrom(bytes &other, size_t offset = 0) + { + copyFrom(other.ptr, other.len, offset); + } + void saveFrom(bytes &other) + { + saveFrom(other.ptr, other.len); + } + void clear(int fill_byte = 0) + { + memset(ptr, fill_byte, len); + } + int8_t *writeTo(int8_t *bp); + bool equals(bytes &other) + { + return 0 == compareTo(other); + } + int compareTo(bytes &other); + bool contains(int8_t c) + { + return indexOf(c) >= 0; + } + int indexOf(int8_t c); + // substrings: + static bytes of(int8_t *ptr, size_t len) + { + bytes res; + res.set(ptr, len); + return res; + } + bytes slice(size_t beg, size_t end) + { + bytes res; + res.ptr = ptr + beg; + res.len = end - beg; + assert(res.len == 0 ||(inBounds(res.ptr) && inBounds(res.limit() - 1))); + return res; + } + // building C strings inside byte buffers: + bytes &strcat(const char *str) + { + ::strcat((char *)ptr, str); + return *this; + } + bytes &strcat(bytes &other) + { + ::strncat((char *)ptr, (char *)other.ptr, other.len); + return *this; + } + char *strval() + { + assert(strlen((char *)ptr) == len); + return (char *)ptr; + } +}; +#define BYTES_OF(var) (bytes::of((int8_t *)&(var), sizeof(var))) + +struct fillbytes +{ + bytes b; + size_t allocated; + + int8_t *base() + { + return b.ptr; + } + size_t size() + { + return b.len; + } + int8_t *limit() + { + return b.limit(); + } // logical limit + void setLimit(int8_t *lp) + { + assert(isAllocated(lp)); + b.len = lp - b.ptr; + } + int8_t *end() + { + return b.ptr + allocated; + } // physical limit + int8_t *loc(size_t o) + { + assert(o < b.len); + return b.ptr + o; + } + void init() + { + allocated = 0; + b.set(nullptr, 0); + } + void init(size_t s) + { + init(); + ensureSize(s); + } + void free() + { + if (allocated != 0) + b.free(); + allocated = 0; + } + void empty() + { + b.len = 0; + } + int8_t *grow(size_t s); // grow so that limit() += s + int getByte(uint32_t i) + { + return *loc(i) & 0xFF; + } + void addByte(int8_t x) + { + *grow(1) = x; + } + void ensureSize(size_t s); // make sure allocated >= s + void trimToSize() + { + if (allocated > size()) + b.realloc(allocated = size()); + } + bool canAppend(size_t s) + { + return allocated > b.len + s; + } + bool isAllocated(int8_t *p) + { + return p >= base() && p <= end(); + } // asserts + void set(bytes &src) + { + set(src.ptr, src.len); + } + + void set(int8_t *ptr, size_t len) + { + b.set(ptr, len); + allocated = 0; // mark as not reallocatable + } + + // block operations on resizing byte buffer: + fillbytes &append(const void *ptr_, size_t len_) + { + memcpy(grow(len_), ptr_, len_); + return (*this); + } + fillbytes &append(bytes &other) + { + return append(other.ptr, other.len); + } + fillbytes &append(const char *str) + { + return append(str, strlen(str)); + } +}; + +struct ptrlist : fillbytes +{ + typedef const void *cvptr; + int length() + { + return (int)(size() / sizeof(cvptr)); + } + cvptr *base() + { + return (cvptr *)fillbytes::base(); + } + cvptr &get(int i) + { + return *(cvptr *)loc(i * sizeof(cvptr)); + } + cvptr *limit() + { + return (cvptr *)fillbytes::limit(); + } + void add(cvptr x) + { + *(cvptr *)grow(sizeof(x)) = x; + } + void popTo(int l) + { + assert(l <= length()); + b.len = l * sizeof(cvptr); + } + int indexOf(cvptr x); + bool contains(cvptr x) + { + return indexOf(x) >= 0; + } + void freeAll(); // frees every ptr on the list, plus the list itself +}; +// Use a macro rather than mess with subtle mismatches +// between member and non-member function pointers. +#define PTRLIST_QSORT(ptrls, fn) ::qsort((ptrls).base(), (ptrls).length(), sizeof(void *), fn) + +struct intlist : fillbytes +{ + int length() + { + return (int)(size() / sizeof(int)); + } + int *base() + { + return (int *)fillbytes::base(); + } + int &get(int i) + { + return *(int *)loc(i * sizeof(int)); + } + int *limit() + { + return (int *)fillbytes::limit(); + } + void add(int x) + { + *(int *)grow(sizeof(x)) = x; + } + void popTo(int l) + { + assert(l <= length()); + b.len = l * sizeof(int); + } + int indexOf(int x); + bool contains(int x) + { + return indexOf(x) >= 0; + } +}; -- cgit v1.2.3