- embed and use asmjit to JIT ZScript VM functions
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Magnus Norddahl
parent
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commit
cbb945d8a7
79 changed files with 50124 additions and 2 deletions
289
asmjit/asmjit/base/string.h
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289
asmjit/asmjit/base/string.h
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// [AsmJit]
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// Complete x86/x64 JIT and Remote Assembler for C++.
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//
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// [License]
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// Zlib - See LICENSE.md file in the package.
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// [Guard]
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#ifndef _ASMJIT_BASE_STRING_H
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#define _ASMJIT_BASE_STRING_H
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// [Dependencies]
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#include "../base/globals.h"
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// [Api-Begin]
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#include "../asmjit_apibegin.h"
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namespace asmjit {
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//! \addtogroup asmjit_base
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//! \{
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// ============================================================================
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// [asmjit::SmallString]
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// ============================================================================
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//! Small string is a template that helps to create strings that can be either
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//! statically allocated if they are small, or externally allocated in case
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//! their length exceed the limit. The `WholeSize` represents the size of the
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//! whole `SmallString` structure, based on that size the maximum size of the
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//! internal buffer is determined.
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template<size_t WholeSize>
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class SmallString {
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public:
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enum { kMaxEmbeddedLength = WholeSize - 5 };
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ASMJIT_INLINE SmallString() noexcept { reset(); }
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ASMJIT_INLINE void reset() noexcept { ::memset(this, 0, sizeof(*this)); }
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ASMJIT_INLINE bool isEmpty() const noexcept { return _length == 0; }
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ASMJIT_INLINE bool isEmbedded() const noexcept { return _length <= kMaxEmbeddedLength; }
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ASMJIT_INLINE bool mustEmbed(size_t len) const noexcept { return len <= kMaxEmbeddedLength; }
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ASMJIT_INLINE uint32_t getLength() const noexcept { return _length; }
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ASMJIT_INLINE char* getData() const noexcept {
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return _length <= kMaxEmbeddedLength ? const_cast<char*>(_embedded) : _external[1];
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}
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ASMJIT_INLINE void setEmbedded(const char* data, size_t len) noexcept {
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ASMJIT_ASSERT(len <= kMaxEmbeddedLength);
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_length = static_cast<uint32_t>(len);
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::memcpy(_embedded, data, len);
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_embedded[len] = '\0';
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}
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ASMJIT_INLINE void setExternal(const char* data, size_t len) noexcept {
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ASMJIT_ASSERT(len > kMaxEmbeddedLength);
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ASMJIT_ASSERT(len <= ~static_cast<uint32_t>(0));
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_length = static_cast<uint32_t>(len);
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_external[1] = const_cast<char*>(data);
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}
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union {
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struct {
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uint32_t _length;
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char _embedded[WholeSize - 4];
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};
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char* _external[2];
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};
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};
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// ============================================================================
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// [asmjit::StringBuilder]
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// ============================================================================
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//! String builder.
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//!
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//! String builder was designed to be able to build a string using append like
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//! operation to append numbers, other strings, or signle characters. It can
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//! allocate it's own buffer or use a buffer created on the stack.
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//!
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//! String builder contains method specific to AsmJit functionality, used for
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//! logging or HTML output.
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class StringBuilder {
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public:
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ASMJIT_NONCOPYABLE(StringBuilder)
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//! \internal
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//!
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//! String operation.
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ASMJIT_ENUM(OpType) {
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kStringOpSet = 0, //!< Replace the current string by a given content.
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kStringOpAppend = 1 //!< Append a given content to the current string.
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};
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//! \internal
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//!
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//! String format flags.
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ASMJIT_ENUM(StringFormatFlags) {
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kStringFormatShowSign = 0x00000001,
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kStringFormatShowSpace = 0x00000002,
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kStringFormatAlternate = 0x00000004,
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kStringFormatSigned = 0x80000000
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};
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// --------------------------------------------------------------------------
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// [Construction / Destruction]
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// --------------------------------------------------------------------------
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ASMJIT_API StringBuilder() noexcept;
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ASMJIT_API ~StringBuilder() noexcept;
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ASMJIT_INLINE StringBuilder(const _NoInit&) noexcept {}
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// --------------------------------------------------------------------------
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// [Accessors]
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// --------------------------------------------------------------------------
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//! Get string builder capacity.
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ASMJIT_INLINE size_t getCapacity() const noexcept { return _capacity; }
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//! Get length.
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ASMJIT_INLINE size_t getLength() const noexcept { return _length; }
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//! Get null-terminated string data.
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ASMJIT_INLINE char* getData() noexcept { return _data; }
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//! Get null-terminated string data (const).
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ASMJIT_INLINE const char* getData() const noexcept { return _data; }
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// --------------------------------------------------------------------------
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// [Prepare / Reserve]
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// --------------------------------------------------------------------------
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//! Prepare to set/append.
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ASMJIT_API char* prepare(uint32_t op, size_t len) noexcept;
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//! Reserve `to` bytes in string builder.
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ASMJIT_API Error reserve(size_t to) noexcept;
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// --------------------------------------------------------------------------
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// [Clear]
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// --------------------------------------------------------------------------
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//! Clear the content in String builder.
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ASMJIT_API void clear() noexcept;
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// --------------------------------------------------------------------------
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// [Op]
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// --------------------------------------------------------------------------
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ASMJIT_API Error _opString(uint32_t op, const char* str, size_t len = Globals::kInvalidIndex) noexcept;
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ASMJIT_API Error _opVFormat(uint32_t op, const char* fmt, va_list ap) noexcept;
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ASMJIT_API Error _opChar(uint32_t op, char c) noexcept;
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ASMJIT_API Error _opChars(uint32_t op, char c, size_t n) noexcept;
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ASMJIT_API Error _opNumber(uint32_t op, uint64_t i, uint32_t base = 0, size_t width = 0, uint32_t flags = 0) noexcept;
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ASMJIT_API Error _opHex(uint32_t op, const void* data, size_t len) noexcept;
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// --------------------------------------------------------------------------
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// [Set]
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// --------------------------------------------------------------------------
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//! Replace the current string with `str` having `len` characters (or `kInvalidIndex` if it's null terminated).
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ASMJIT_INLINE Error setString(const char* str, size_t len = Globals::kInvalidIndex) noexcept { return _opString(kStringOpSet, str, len); }
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//! Replace the current content by a formatted string `fmt`.
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ASMJIT_API Error setFormat(const char* fmt, ...) noexcept;
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//! Replace the current content by a formatted string `fmt` (va_list version).
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ASMJIT_INLINE Error setFormatVA(const char* fmt, va_list ap) noexcept { return _opVFormat(kStringOpSet, fmt, ap); }
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//! Replace the current content by a single `c` character.
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ASMJIT_INLINE Error setChar(char c) noexcept { return _opChar(kStringOpSet, c); }
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//! Replace the current content by `c` character `n` times.
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ASMJIT_INLINE Error setChars(char c, size_t n) noexcept { return _opChars(kStringOpSet, c, n); }
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//! Replace the current content by a formatted integer `i` (signed).
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ASMJIT_INLINE Error setInt(uint64_t i, uint32_t base = 0, size_t width = 0, uint32_t flags = 0) noexcept {
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return _opNumber(kStringOpSet, i, base, width, flags | kStringFormatSigned);
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}
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//! Replace the current content by a formatted integer `i` (unsigned).
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ASMJIT_INLINE Error setUInt(uint64_t i, uint32_t base = 0, size_t width = 0, uint32_t flags = 0) noexcept {
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return _opNumber(kStringOpSet, i, base, width, flags);
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}
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//! Replace the current content by the given `data` converted to a HEX string.
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ASMJIT_INLINE Error setHex(const void* data, size_t len) noexcept {
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return _opHex(kStringOpSet, data, len);
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}
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// --------------------------------------------------------------------------
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// [Append]
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// --------------------------------------------------------------------------
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//! Append string `str` having `len` characters (or `kInvalidIndex` if it's null terminated).
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ASMJIT_INLINE Error appendString(const char* str, size_t len = Globals::kInvalidIndex) noexcept { return _opString(kStringOpAppend, str, len); }
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//! Append a formatted string `fmt`.
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ASMJIT_API Error appendFormat(const char* fmt, ...) noexcept;
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//! Append a formatted string `fmt` (va_list version).
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ASMJIT_INLINE Error appendFormatVA(const char* fmt, va_list ap) noexcept { return _opVFormat(kStringOpAppend, fmt, ap); }
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//! Append a single `c` character.
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ASMJIT_INLINE Error appendChar(char c) noexcept { return _opChar(kStringOpAppend, c); }
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//! Append `c` character `n` times.
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ASMJIT_INLINE Error appendChars(char c, size_t n) noexcept { return _opChars(kStringOpAppend, c, n); }
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//! Append `i`.
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ASMJIT_INLINE Error appendInt(int64_t i, uint32_t base = 0, size_t width = 0, uint32_t flags = 0) noexcept {
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return _opNumber(kStringOpAppend, static_cast<uint64_t>(i), base, width, flags | kStringFormatSigned);
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}
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//! Append `i`.
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ASMJIT_INLINE Error appendUInt(uint64_t i, uint32_t base = 0, size_t width = 0, uint32_t flags = 0) noexcept {
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return _opNumber(kStringOpAppend, i, base, width, flags);
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}
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//! Append the given `data` converted to a HEX string.
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ASMJIT_INLINE Error appendHex(const void* data, size_t len) noexcept {
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return _opHex(kStringOpAppend, data, len);
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}
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// --------------------------------------------------------------------------
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// [Eq]
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// --------------------------------------------------------------------------
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//! Check for equality with other `str` of length `len`.
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ASMJIT_API bool eq(const char* str, size_t len = Globals::kInvalidIndex) const noexcept;
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//! Check for equality with `other`.
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ASMJIT_INLINE bool eq(const StringBuilder& other) const noexcept { return eq(other._data, other._length); }
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// --------------------------------------------------------------------------
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// [Operator Overload]
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// --------------------------------------------------------------------------
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ASMJIT_INLINE bool operator==(const StringBuilder& other) const noexcept { return eq(other); }
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ASMJIT_INLINE bool operator!=(const StringBuilder& other) const noexcept { return !eq(other); }
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ASMJIT_INLINE bool operator==(const char* str) const noexcept { return eq(str); }
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ASMJIT_INLINE bool operator!=(const char* str) const noexcept { return !eq(str); }
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// --------------------------------------------------------------------------
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// [Members]
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// --------------------------------------------------------------------------
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char* _data; //!< String data.
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size_t _length; //!< String length.
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size_t _capacity; //!< String capacity.
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size_t _canFree; //!< If the string data can be freed.
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};
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// ============================================================================
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// [asmjit::StringBuilderTmp]
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// ============================================================================
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//! Temporary string builder, has statically allocated `N` bytes.
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template<size_t N>
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class StringBuilderTmp : public StringBuilder {
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public:
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ASMJIT_NONCOPYABLE(StringBuilderTmp<N>)
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// --------------------------------------------------------------------------
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// [Construction / Destruction]
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// --------------------------------------------------------------------------
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ASMJIT_INLINE StringBuilderTmp() noexcept : StringBuilder(NoInit) {
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_data = _embeddedData;
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_data[0] = 0;
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_length = 0;
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_capacity = N;
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_canFree = false;
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}
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// --------------------------------------------------------------------------
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// [Members]
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// --------------------------------------------------------------------------
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//! Embedded data.
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char _embeddedData[static_cast<size_t>(
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N + 1 + sizeof(intptr_t)) & ~static_cast<size_t>(sizeof(intptr_t) - 1)];
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};
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//! \}
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} // asmjit namespace
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// [Api-End]
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#include "../asmjit_apiend.h"
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// [Guard]
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#endif // _ASMJIT_BASE_STRING_H
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