1//===-- Stream.cpp --------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Utility/Stream.h"
10
11#include "lldb/Utility/AnsiTerminal.h"
12#include "lldb/Utility/Endian.h"
13#include "lldb/Utility/VASPrintf.h"
14#include "llvm/ADT/SmallString.h"
15#include "llvm/Support/Format.h"
16#include "llvm/Support/LEB128.h"
17#include "llvm/Support/Regex.h"
18
19#include <string>
20
21#include <cinttypes>
22#include <cstddef>
23
24using namespace lldb;
25using namespace lldb_private;
26
27Stream::Stream(uint32_t flags, uint32_t addr_size, ByteOrder byte_order,
28 bool colors)
29 : m_flags(flags), m_addr_size(addr_size), m_byte_order(byte_order),
30 m_forwarder(*this, colors) {}
31
32Stream::Stream(bool colors)
33 : m_flags(0), m_byte_order(endian::InlHostByteOrder()),
34 m_forwarder(*this, colors) {}
35
36// Destructor
37Stream::~Stream() = default;
38
39ByteOrder Stream::SetByteOrder(ByteOrder byte_order) {
40 ByteOrder old_byte_order = m_byte_order;
41 m_byte_order = byte_order;
42 return old_byte_order;
43}
44
45// Put an offset "uval" out to the stream using the printf format in "format".
46void Stream::Offset(uint32_t uval, const char *format) { Printf(format, uval); }
47
48// Put an SLEB128 "uval" out to the stream using the printf format in "format".
49size_t Stream::PutSLEB128(int64_t sval) {
50 if (m_flags.Test(bit: eBinary))
51 return llvm::encodeSLEB128(Value: sval, OS&: m_forwarder);
52 else
53 return Printf(format: "0x%" PRIi64, sval);
54}
55
56// Put an ULEB128 "uval" out to the stream using the printf format in "format".
57size_t Stream::PutULEB128(uint64_t uval) {
58 if (m_flags.Test(bit: eBinary))
59 return llvm::encodeULEB128(Value: uval, OS&: m_forwarder);
60 else
61 return Printf(format: "0x%" PRIx64, uval);
62}
63
64// Print a raw NULL terminated C string to the stream.
65size_t Stream::PutCString(llvm::StringRef str) {
66 size_t bytes_written = 0;
67 bytes_written = Write(src: str.data(), src_len: str.size());
68
69 // when in binary mode, emit the NULL terminator
70 if (m_flags.Test(bit: eBinary))
71 bytes_written += PutChar(ch: '\0');
72 return bytes_written;
73}
74
75void Stream::PutCStringColorHighlighted(
76 llvm::StringRef text, std::optional<HighlightSettings> pattern_info) {
77 // Only apply color formatting when a pattern information is specified.
78 // Otherwise, output the text without color formatting.
79 if (!pattern_info.has_value()) {
80 PutCString(str: text);
81 return;
82 }
83
84 llvm::Regex reg_pattern(pattern_info->pattern);
85 llvm::SmallVector<llvm::StringRef, 1> matches;
86 llvm::StringRef remaining = text;
87 std::string format_str = lldb_private::ansi::FormatAnsiTerminalCodes(
88 format: pattern_info->prefix.str() + "%.*s" + pattern_info->suffix.str());
89 while (reg_pattern.match(String: remaining, Matches: &matches)) {
90 llvm::StringRef match = matches[0];
91 size_t match_start_pos = match.data() - remaining.data();
92 PutCString(str: remaining.take_front(N: match_start_pos));
93 Printf(format: format_str.c_str(), match.size(), match.data());
94 remaining = remaining.drop_front(N: match_start_pos + match.size());
95 }
96 if (remaining.size())
97 PutCString(str: remaining);
98}
99
100// Print a double quoted NULL terminated C string to the stream using the
101// printf format in "format".
102void Stream::QuotedCString(const char *cstr, const char *format) {
103 Printf(format, cstr);
104}
105
106// Put an address "addr" out to the stream with optional prefix and suffix
107// strings.
108void lldb_private::DumpAddress(llvm::raw_ostream &s, uint64_t addr,
109 uint32_t addr_size, const char *prefix,
110 const char *suffix) {
111 if (prefix == nullptr)
112 prefix = "";
113 if (suffix == nullptr)
114 suffix = "";
115 s << prefix << llvm::format_hex(N: addr, Width: 2 + 2 * addr_size) << suffix;
116}
117
118// Put an address range out to the stream with optional prefix and suffix
119// strings.
120void lldb_private::DumpAddressRange(llvm::raw_ostream &s, uint64_t lo_addr,
121 uint64_t hi_addr, uint32_t addr_size,
122 const char *prefix, const char *suffix) {
123 if (prefix && prefix[0])
124 s << prefix;
125 DumpAddress(s, addr: lo_addr, addr_size, prefix: "[");
126 DumpAddress(s, addr: hi_addr, addr_size, prefix: "-", suffix: ")");
127 if (suffix && suffix[0])
128 s << suffix;
129}
130
131size_t Stream::PutChar(char ch) { return Write(src: &ch, src_len: 1); }
132
133// Print some formatted output to the stream.
134size_t Stream::Printf(const char *format, ...) {
135 va_list args;
136 va_start(args, format);
137 size_t result = PrintfVarArg(format, args);
138 va_end(args);
139 return result;
140}
141
142// Print some formatted output to the stream.
143size_t Stream::PrintfVarArg(const char *format, va_list args) {
144 llvm::SmallString<1024> buf;
145 VASprintf(buf, fmt: format, args);
146
147 // Include the NULL termination byte for binary output
148 size_t length = buf.size();
149 if (m_flags.Test(bit: eBinary))
150 ++length;
151 return Write(src: buf.c_str(), src_len: length);
152}
153
154// Print and End of Line character to the stream
155size_t Stream::EOL() { return PutChar(ch: '\n'); }
156
157size_t Stream::Indent(llvm::StringRef str) {
158 const size_t ind_length = PutCString(str: std::string(m_indent_level, ' '));
159 const size_t str_length = PutCString(str);
160 return ind_length + str_length;
161}
162
163// Stream a character "ch" out to this stream.
164Stream &Stream::operator<<(char ch) {
165 PutChar(ch);
166 return *this;
167}
168
169// Stream the NULL terminated C string out to this stream.
170Stream &Stream::operator<<(const char *s) {
171 Printf(format: "%s", s);
172 return *this;
173}
174
175Stream &Stream::operator<<(llvm::StringRef str) {
176 Write(src: str.data(), src_len: str.size());
177 return *this;
178}
179
180// Stream the pointer value out to this stream.
181Stream &Stream::operator<<(const void *p) {
182 Printf(format: "0x%.*tx", static_cast<int>(sizeof(const void *)) * 2, (ptrdiff_t)p);
183 return *this;
184}
185
186// Get the current indentation level
187unsigned Stream::GetIndentLevel() const { return m_indent_level; }
188
189// Set the current indentation level
190void Stream::SetIndentLevel(unsigned indent_level) {
191 m_indent_level = indent_level;
192}
193
194// Increment the current indentation level
195void Stream::IndentMore(unsigned amount) { m_indent_level += amount; }
196
197// Decrement the current indentation level
198void Stream::IndentLess(unsigned amount) {
199 if (m_indent_level >= amount)
200 m_indent_level -= amount;
201 else
202 m_indent_level = 0;
203}
204
205// Get the address size in bytes
206uint32_t Stream::GetAddressByteSize() const { return m_addr_size; }
207
208// Set the address size in bytes
209void Stream::SetAddressByteSize(uint32_t addr_size) { m_addr_size = addr_size; }
210
211// The flags get accessor
212Flags &Stream::GetFlags() { return m_flags; }
213
214// The flags const get accessor
215const Flags &Stream::GetFlags() const { return m_flags; }
216
217// The byte order get accessor
218
219lldb::ByteOrder Stream::GetByteOrder() const { return m_byte_order; }
220
221size_t Stream::PrintfAsRawHex8(const char *format, ...) {
222 va_list args;
223 va_start(args, format);
224
225 llvm::SmallString<1024> buf;
226 VASprintf(buf, fmt: format, args);
227
228 ByteDelta delta(*this);
229 for (char C : buf)
230 _PutHex8(uvalue: C, add_prefix: false);
231
232 va_end(args);
233
234 return *delta;
235}
236
237size_t Stream::PutNHex8(size_t n, uint8_t uvalue) {
238 ByteDelta delta(*this);
239 for (size_t i = 0; i < n; ++i)
240 _PutHex8(uvalue, add_prefix: false);
241 return *delta;
242}
243
244void Stream::_PutHex8(uint8_t uvalue, bool add_prefix) {
245 if (m_flags.Test(bit: eBinary)) {
246 Write(src: &uvalue, src_len: 1);
247 } else {
248 if (add_prefix)
249 PutCString(str: "0x");
250
251 static char g_hex_to_ascii_hex_char[16] = {'0', '1', '2', '3', '4', '5',
252 '6', '7', '8', '9', 'a', 'b',
253 'c', 'd', 'e', 'f'};
254 char nibble_chars[2];
255 nibble_chars[0] = g_hex_to_ascii_hex_char[(uvalue >> 4) & 0xf];
256 nibble_chars[1] = g_hex_to_ascii_hex_char[(uvalue >> 0) & 0xf];
257 Write(src: nibble_chars, src_len: sizeof(nibble_chars));
258 }
259}
260
261size_t Stream::PutHex8(uint8_t uvalue) {
262 ByteDelta delta(*this);
263 _PutHex8(uvalue, add_prefix: false);
264 return *delta;
265}
266
267size_t Stream::PutHex16(uint16_t uvalue, ByteOrder byte_order) {
268 ByteDelta delta(*this);
269
270 if (byte_order == eByteOrderInvalid)
271 byte_order = m_byte_order;
272
273 if (byte_order == eByteOrderLittle) {
274 for (size_t byte = 0; byte < sizeof(uvalue); ++byte)
275 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
276 } else {
277 for (size_t byte = sizeof(uvalue) - 1; byte < sizeof(uvalue); --byte)
278 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
279 }
280 return *delta;
281}
282
283size_t Stream::PutHex32(uint32_t uvalue, ByteOrder byte_order) {
284 ByteDelta delta(*this);
285
286 if (byte_order == eByteOrderInvalid)
287 byte_order = m_byte_order;
288
289 if (byte_order == eByteOrderLittle) {
290 for (size_t byte = 0; byte < sizeof(uvalue); ++byte)
291 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
292 } else {
293 for (size_t byte = sizeof(uvalue) - 1; byte < sizeof(uvalue); --byte)
294 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
295 }
296 return *delta;
297}
298
299size_t Stream::PutHex64(uint64_t uvalue, ByteOrder byte_order) {
300 ByteDelta delta(*this);
301
302 if (byte_order == eByteOrderInvalid)
303 byte_order = m_byte_order;
304
305 if (byte_order == eByteOrderLittle) {
306 for (size_t byte = 0; byte < sizeof(uvalue); ++byte)
307 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
308 } else {
309 for (size_t byte = sizeof(uvalue) - 1; byte < sizeof(uvalue); --byte)
310 _PutHex8(uvalue: static_cast<uint8_t>(uvalue >> (byte * 8)), add_prefix: false);
311 }
312 return *delta;
313}
314
315size_t Stream::PutMaxHex64(uint64_t uvalue, size_t byte_size,
316 lldb::ByteOrder byte_order) {
317 switch (byte_size) {
318 case 1:
319 return PutHex8(uvalue: static_cast<uint8_t>(uvalue));
320 case 2:
321 return PutHex16(uvalue: static_cast<uint16_t>(uvalue), byte_order);
322 case 4:
323 return PutHex32(uvalue: static_cast<uint32_t>(uvalue), byte_order);
324 case 8:
325 return PutHex64(uvalue, byte_order);
326 }
327 return 0;
328}
329
330size_t Stream::PutPointer(void *ptr) {
331 return PutRawBytes(s: &ptr, src_len: sizeof(ptr), src_byte_order: endian::InlHostByteOrder(),
332 dst_byte_order: endian::InlHostByteOrder());
333}
334
335size_t Stream::PutFloat(float f, ByteOrder byte_order) {
336 if (byte_order == eByteOrderInvalid)
337 byte_order = m_byte_order;
338
339 return PutRawBytes(s: &f, src_len: sizeof(f), src_byte_order: endian::InlHostByteOrder(), dst_byte_order: byte_order);
340}
341
342size_t Stream::PutDouble(double d, ByteOrder byte_order) {
343 if (byte_order == eByteOrderInvalid)
344 byte_order = m_byte_order;
345
346 return PutRawBytes(s: &d, src_len: sizeof(d), src_byte_order: endian::InlHostByteOrder(), dst_byte_order: byte_order);
347}
348
349size_t Stream::PutLongDouble(long double ld, ByteOrder byte_order) {
350 if (byte_order == eByteOrderInvalid)
351 byte_order = m_byte_order;
352
353 return PutRawBytes(s: &ld, src_len: sizeof(ld), src_byte_order: endian::InlHostByteOrder(), dst_byte_order: byte_order);
354}
355
356size_t Stream::PutRawBytes(const void *s, size_t src_len,
357 ByteOrder src_byte_order, ByteOrder dst_byte_order) {
358 ByteDelta delta(*this);
359
360 if (src_byte_order == eByteOrderInvalid)
361 src_byte_order = m_byte_order;
362
363 if (dst_byte_order == eByteOrderInvalid)
364 dst_byte_order = m_byte_order;
365
366 const uint8_t *src = static_cast<const uint8_t *>(s);
367 bool binary_was_set = m_flags.Test(bit: eBinary);
368 if (!binary_was_set)
369 m_flags.Set(eBinary);
370 if (src_byte_order == dst_byte_order) {
371 for (size_t i = 0; i < src_len; ++i)
372 _PutHex8(uvalue: src[i], add_prefix: false);
373 } else {
374 for (size_t i = src_len; i > 0; --i)
375 _PutHex8(uvalue: src[i - 1], add_prefix: false);
376 }
377 if (!binary_was_set)
378 m_flags.Clear(mask: eBinary);
379
380 return *delta;
381}
382
383size_t Stream::PutBytesAsRawHex8(const void *s, size_t src_len,
384 ByteOrder src_byte_order,
385 ByteOrder dst_byte_order) {
386 ByteDelta delta(*this);
387
388 if (src_byte_order == eByteOrderInvalid)
389 src_byte_order = m_byte_order;
390
391 if (dst_byte_order == eByteOrderInvalid)
392 dst_byte_order = m_byte_order;
393
394 const uint8_t *src = static_cast<const uint8_t *>(s);
395 bool binary_is_set = m_flags.Test(bit: eBinary);
396 m_flags.Clear(mask: eBinary);
397 if (src_byte_order == dst_byte_order) {
398 for (size_t i = 0; i < src_len; ++i)
399 _PutHex8(uvalue: src[i], add_prefix: false);
400 } else {
401 for (size_t i = src_len; i > 0; --i)
402 _PutHex8(uvalue: src[i - 1], add_prefix: false);
403 }
404 if (binary_is_set)
405 m_flags.Set(eBinary);
406
407 return *delta;
408}
409
410size_t Stream::PutStringAsRawHex8(llvm::StringRef s) {
411 ByteDelta delta(*this);
412 bool binary_is_set = m_flags.Test(bit: eBinary);
413 m_flags.Clear(mask: eBinary);
414 for (char c : s)
415 _PutHex8(uvalue: c, add_prefix: false);
416 if (binary_is_set)
417 m_flags.Set(eBinary);
418 return *delta;
419}
420

source code of lldb/source/Utility/Stream.cpp