Bitcoin Core  0.20.99
P2P Digital Currency
strencodings.cpp
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1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2020 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 
6 #include <util/strencodings.h>
7 #include <util/string.h>
8 
9 #include <tinyformat.h>
10 
11 #include <algorithm>
12 #include <cstdlib>
13 #include <cstring>
14 #include <errno.h>
15 #include <limits>
16 
17 static const std::string CHARS_ALPHA_NUM = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
18 
19 static const std::string SAFE_CHARS[] =
20 {
21  CHARS_ALPHA_NUM + " .,;-_/:?@()", // SAFE_CHARS_DEFAULT
22  CHARS_ALPHA_NUM + " .,;-_?@", // SAFE_CHARS_UA_COMMENT
23  CHARS_ALPHA_NUM + ".-_", // SAFE_CHARS_FILENAME
24  CHARS_ALPHA_NUM + "!*'();:@&=+$,/?#[]-_.~%", // SAFE_CHARS_URI
25 };
26 
27 std::string SanitizeString(const std::string& str, int rule)
28 {
29  std::string strResult;
30  for (std::string::size_type i = 0; i < str.size(); i++)
31  {
32  if (SAFE_CHARS[rule].find(str[i]) != std::string::npos)
33  strResult.push_back(str[i]);
34  }
35  return strResult;
36 }
37 
38 const signed char p_util_hexdigit[256] =
39 { -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
40  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
41  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
42  0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,
43  -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
44  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
45  -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
46  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
47  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
48  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
49  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
50  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
51  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
52  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
53  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
54  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, };
55 
56 signed char HexDigit(char c)
57 {
58  return p_util_hexdigit[(unsigned char)c];
59 }
60 
61 bool IsHex(const std::string& str)
62 {
63  for(std::string::const_iterator it(str.begin()); it != str.end(); ++it)
64  {
65  if (HexDigit(*it) < 0)
66  return false;
67  }
68  return (str.size() > 0) && (str.size()%2 == 0);
69 }
70 
71 bool IsHexNumber(const std::string& str)
72 {
73  size_t starting_location = 0;
74  if (str.size() > 2 && *str.begin() == '0' && *(str.begin()+1) == 'x') {
75  starting_location = 2;
76  }
77  for (const char c : str.substr(starting_location)) {
78  if (HexDigit(c) < 0) return false;
79  }
80  // Return false for empty string or "0x".
81  return (str.size() > starting_location);
82 }
83 
84 std::vector<unsigned char> ParseHex(const char* psz)
85 {
86  // convert hex dump to vector
87  std::vector<unsigned char> vch;
88  while (true)
89  {
90  while (IsSpace(*psz))
91  psz++;
92  signed char c = HexDigit(*psz++);
93  if (c == (signed char)-1)
94  break;
95  unsigned char n = (c << 4);
96  c = HexDigit(*psz++);
97  if (c == (signed char)-1)
98  break;
99  n |= c;
100  vch.push_back(n);
101  }
102  return vch;
103 }
104 
105 std::vector<unsigned char> ParseHex(const std::string& str)
106 {
107  return ParseHex(str.c_str());
108 }
109 
110 void SplitHostPort(std::string in, int &portOut, std::string &hostOut) {
111  size_t colon = in.find_last_of(':');
112  // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator
113  bool fHaveColon = colon != in.npos;
114  bool fBracketed = fHaveColon && (in[0]=='[' && in[colon-1]==']'); // if there is a colon, and in[0]=='[', colon is not 0, so in[colon-1] is safe
115  bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
116  if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
117  int32_t n;
118  if (ParseInt32(in.substr(colon + 1), &n) && n > 0 && n < 0x10000) {
119  in = in.substr(0, colon);
120  portOut = n;
121  }
122  }
123  if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
124  hostOut = in.substr(1, in.size()-2);
125  else
126  hostOut = in;
127 }
128 
130 {
131  static const char *pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
132 
133  std::string str;
134  str.reserve(((input.size() + 2) / 3) * 4);
135  ConvertBits<8, 6, true>([&](int v) { str += pbase64[v]; }, input.begin(), input.end());
136  while (str.size() % 4) str += '=';
137  return str;
138 }
139 
140 std::string EncodeBase64(const std::string& str)
141 {
142  return EncodeBase64(MakeUCharSpan(str));
143 }
144 
145 std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid)
146 {
147  static const int decode64_table[256] =
148  {
149  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
150  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
151  -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
152  -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
153  15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28,
154  29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
155  49, 50, 51, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
156  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
157  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
158  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
159  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
160  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
161  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
162  };
163 
164  const char* e = p;
165  std::vector<uint8_t> val;
166  val.reserve(strlen(p));
167  while (*p != 0) {
168  int x = decode64_table[(unsigned char)*p];
169  if (x == -1) break;
170  val.push_back(x);
171  ++p;
172  }
173 
174  std::vector<unsigned char> ret;
175  ret.reserve((val.size() * 3) / 4);
176  bool valid = ConvertBits<6, 8, false>([&](unsigned char c) { ret.push_back(c); }, val.begin(), val.end());
177 
178  const char* q = p;
179  while (valid && *p != 0) {
180  if (*p != '=') {
181  valid = false;
182  break;
183  }
184  ++p;
185  }
186  valid = valid && (p - e) % 4 == 0 && p - q < 4;
187  if (pf_invalid) *pf_invalid = !valid;
188 
189  return ret;
190 }
191 
192 std::string DecodeBase64(const std::string& str, bool* pf_invalid)
193 {
194  if (!ValidAsCString(str)) {
195  if (pf_invalid) {
196  *pf_invalid = true;
197  }
198  return {};
199  }
200  std::vector<unsigned char> vchRet = DecodeBase64(str.c_str(), pf_invalid);
201  return std::string((const char*)vchRet.data(), vchRet.size());
202 }
203 
204 std::string EncodeBase32(Span<const unsigned char> input, bool pad)
205 {
206  static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
207 
208  std::string str;
209  str.reserve(((input.size() + 4) / 5) * 8);
210  ConvertBits<8, 5, true>([&](int v) { str += pbase32[v]; }, input.begin(), input.end());
211  if (pad) {
212  while (str.size() % 8) {
213  str += '=';
214  }
215  }
216  return str;
217 }
218 
219 std::string EncodeBase32(const std::string& str, bool pad)
220 {
221  return EncodeBase32(MakeUCharSpan(str), pad);
222 }
223 
224 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
225 {
226  static const int decode32_table[256] =
227  {
228  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
229  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
230  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, -1, -1, -1, -1,
231  -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
232  15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 0, 1, 2,
233  3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
234  23, 24, 25, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
235  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
236  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
237  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
238  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
239  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
240  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
241  };
242 
243  const char* e = p;
244  std::vector<uint8_t> val;
245  val.reserve(strlen(p));
246  while (*p != 0) {
247  int x = decode32_table[(unsigned char)*p];
248  if (x == -1) break;
249  val.push_back(x);
250  ++p;
251  }
252 
253  std::vector<unsigned char> ret;
254  ret.reserve((val.size() * 5) / 8);
255  bool valid = ConvertBits<5, 8, false>([&](unsigned char c) { ret.push_back(c); }, val.begin(), val.end());
256 
257  const char* q = p;
258  while (valid && *p != 0) {
259  if (*p != '=') {
260  valid = false;
261  break;
262  }
263  ++p;
264  }
265  valid = valid && (p - e) % 8 == 0 && p - q < 8;
266  if (pf_invalid) *pf_invalid = !valid;
267 
268  return ret;
269 }
270 
271 std::string DecodeBase32(const std::string& str, bool* pf_invalid)
272 {
273  if (!ValidAsCString(str)) {
274  if (pf_invalid) {
275  *pf_invalid = true;
276  }
277  return {};
278  }
279  std::vector<unsigned char> vchRet = DecodeBase32(str.c_str(), pf_invalid);
280  return std::string((const char*)vchRet.data(), vchRet.size());
281 }
282 
283 NODISCARD static bool ParsePrechecks(const std::string& str)
284 {
285  if (str.empty()) // No empty string allowed
286  return false;
287  if (str.size() >= 1 && (IsSpace(str[0]) || IsSpace(str[str.size()-1]))) // No padding allowed
288  return false;
289  if (!ValidAsCString(str)) // No embedded NUL characters allowed
290  return false;
291  return true;
292 }
293 
294 bool ParseInt32(const std::string& str, int32_t *out)
295 {
296  if (!ParsePrechecks(str))
297  return false;
298  char *endp = nullptr;
299  errno = 0; // strtol will not set errno if valid
300  long int n = strtol(str.c_str(), &endp, 10);
301  if(out) *out = (int32_t)n;
302  // Note that strtol returns a *long int*, so even if strtol doesn't report an over/underflow
303  // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
304  // platforms the size of these types may be different.
305  return endp && *endp == 0 && !errno &&
306  n >= std::numeric_limits<int32_t>::min() &&
307  n <= std::numeric_limits<int32_t>::max();
308 }
309 
310 bool ParseInt64(const std::string& str, int64_t *out)
311 {
312  if (!ParsePrechecks(str))
313  return false;
314  char *endp = nullptr;
315  errno = 0; // strtoll will not set errno if valid
316  long long int n = strtoll(str.c_str(), &endp, 10);
317  if(out) *out = (int64_t)n;
318  // Note that strtoll returns a *long long int*, so even if strtol doesn't report an over/underflow
319  // we still have to check that the returned value is within the range of an *int64_t*.
320  return endp && *endp == 0 && !errno &&
321  n >= std::numeric_limits<int64_t>::min() &&
322  n <= std::numeric_limits<int64_t>::max();
323 }
324 
325 bool ParseUInt8(const std::string& str, uint8_t *out)
326 {
327  uint32_t u32;
328  if (!ParseUInt32(str, &u32) || u32 > std::numeric_limits<uint8_t>::max()) {
329  return false;
330  }
331  if (out != nullptr) {
332  *out = static_cast<uint8_t>(u32);
333  }
334  return true;
335 }
336 
337 bool ParseUInt32(const std::string& str, uint32_t *out)
338 {
339  if (!ParsePrechecks(str))
340  return false;
341  if (str.size() >= 1 && str[0] == '-') // Reject negative values, unfortunately strtoul accepts these by default if they fit in the range
342  return false;
343  char *endp = nullptr;
344  errno = 0; // strtoul will not set errno if valid
345  unsigned long int n = strtoul(str.c_str(), &endp, 10);
346  if(out) *out = (uint32_t)n;
347  // Note that strtoul returns a *unsigned long int*, so even if it doesn't report an over/underflow
348  // we still have to check that the returned value is within the range of an *uint32_t*. On 64-bit
349  // platforms the size of these types may be different.
350  return endp && *endp == 0 && !errno &&
351  n <= std::numeric_limits<uint32_t>::max();
352 }
353 
354 bool ParseUInt64(const std::string& str, uint64_t *out)
355 {
356  if (!ParsePrechecks(str))
357  return false;
358  if (str.size() >= 1 && str[0] == '-') // Reject negative values, unfortunately strtoull accepts these by default if they fit in the range
359  return false;
360  char *endp = nullptr;
361  errno = 0; // strtoull will not set errno if valid
362  unsigned long long int n = strtoull(str.c_str(), &endp, 10);
363  if(out) *out = (uint64_t)n;
364  // Note that strtoull returns a *unsigned long long int*, so even if it doesn't report an over/underflow
365  // we still have to check that the returned value is within the range of an *uint64_t*.
366  return endp && *endp == 0 && !errno &&
367  n <= std::numeric_limits<uint64_t>::max();
368 }
369 
370 
371 bool ParseDouble(const std::string& str, double *out)
372 {
373  if (!ParsePrechecks(str))
374  return false;
375  if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed
376  return false;
377  std::istringstream text(str);
378  text.imbue(std::locale::classic());
379  double result;
380  text >> result;
381  if(out) *out = result;
382  return text.eof() && !text.fail();
383 }
384 
385 std::string FormatParagraph(const std::string& in, size_t width, size_t indent)
386 {
387  std::stringstream out;
388  size_t ptr = 0;
389  size_t indented = 0;
390  while (ptr < in.size())
391  {
392  size_t lineend = in.find_first_of('\n', ptr);
393  if (lineend == std::string::npos) {
394  lineend = in.size();
395  }
396  const size_t linelen = lineend - ptr;
397  const size_t rem_width = width - indented;
398  if (linelen <= rem_width) {
399  out << in.substr(ptr, linelen + 1);
400  ptr = lineend + 1;
401  indented = 0;
402  } else {
403  size_t finalspace = in.find_last_of(" \n", ptr + rem_width);
404  if (finalspace == std::string::npos || finalspace < ptr) {
405  // No place to break; just include the entire word and move on
406  finalspace = in.find_first_of("\n ", ptr);
407  if (finalspace == std::string::npos) {
408  // End of the string, just add it and break
409  out << in.substr(ptr);
410  break;
411  }
412  }
413  out << in.substr(ptr, finalspace - ptr) << "\n";
414  if (in[finalspace] == '\n') {
415  indented = 0;
416  } else if (indent) {
417  out << std::string(indent, ' ');
418  indented = indent;
419  }
420  ptr = finalspace + 1;
421  }
422  }
423  return out.str();
424 }
425 
426 int64_t atoi64(const std::string& str)
427 {
428 #ifdef _MSC_VER
429  return _atoi64(str.c_str());
430 #else
431  return strtoll(str.c_str(), nullptr, 10);
432 #endif
433 }
434 
435 int atoi(const std::string& str)
436 {
437  return atoi(str.c_str());
438 }
439 
448 static const int64_t UPPER_BOUND = 1000000000000000000LL - 1LL;
449 
451 static inline bool ProcessMantissaDigit(char ch, int64_t &mantissa, int &mantissa_tzeros)
452 {
453  if(ch == '0')
454  ++mantissa_tzeros;
455  else {
456  for (int i=0; i<=mantissa_tzeros; ++i) {
457  if (mantissa > (UPPER_BOUND / 10LL))
458  return false; /* overflow */
459  mantissa *= 10;
460  }
461  mantissa += ch - '0';
462  mantissa_tzeros = 0;
463  }
464  return true;
465 }
466 
467 bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out)
468 {
469  int64_t mantissa = 0;
470  int64_t exponent = 0;
471  int mantissa_tzeros = 0;
472  bool mantissa_sign = false;
473  bool exponent_sign = false;
474  int ptr = 0;
475  int end = val.size();
476  int point_ofs = 0;
477 
478  if (ptr < end && val[ptr] == '-') {
479  mantissa_sign = true;
480  ++ptr;
481  }
482  if (ptr < end)
483  {
484  if (val[ptr] == '0') {
485  /* pass single 0 */
486  ++ptr;
487  } else if (val[ptr] >= '1' && val[ptr] <= '9') {
488  while (ptr < end && IsDigit(val[ptr])) {
489  if (!ProcessMantissaDigit(val[ptr], mantissa, mantissa_tzeros))
490  return false; /* overflow */
491  ++ptr;
492  }
493  } else return false; /* missing expected digit */
494  } else return false; /* empty string or loose '-' */
495  if (ptr < end && val[ptr] == '.')
496  {
497  ++ptr;
498  if (ptr < end && IsDigit(val[ptr]))
499  {
500  while (ptr < end && IsDigit(val[ptr])) {
501  if (!ProcessMantissaDigit(val[ptr], mantissa, mantissa_tzeros))
502  return false; /* overflow */
503  ++ptr;
504  ++point_ofs;
505  }
506  } else return false; /* missing expected digit */
507  }
508  if (ptr < end && (val[ptr] == 'e' || val[ptr] == 'E'))
509  {
510  ++ptr;
511  if (ptr < end && val[ptr] == '+')
512  ++ptr;
513  else if (ptr < end && val[ptr] == '-') {
514  exponent_sign = true;
515  ++ptr;
516  }
517  if (ptr < end && IsDigit(val[ptr])) {
518  while (ptr < end && IsDigit(val[ptr])) {
519  if (exponent > (UPPER_BOUND / 10LL))
520  return false; /* overflow */
521  exponent = exponent * 10 + val[ptr] - '0';
522  ++ptr;
523  }
524  } else return false; /* missing expected digit */
525  }
526  if (ptr != end)
527  return false; /* trailing garbage */
528 
529  /* finalize exponent */
530  if (exponent_sign)
531  exponent = -exponent;
532  exponent = exponent - point_ofs + mantissa_tzeros;
533 
534  /* finalize mantissa */
535  if (mantissa_sign)
536  mantissa = -mantissa;
537 
538  /* convert to one 64-bit fixed-point value */
539  exponent += decimals;
540  if (exponent < 0)
541  return false; /* cannot represent values smaller than 10^-decimals */
542  if (exponent >= 18)
543  return false; /* cannot represent values larger than or equal to 10^(18-decimals) */
544 
545  for (int i=0; i < exponent; ++i) {
546  if (mantissa > (UPPER_BOUND / 10LL) || mantissa < -(UPPER_BOUND / 10LL))
547  return false; /* overflow */
548  mantissa *= 10;
549  }
550  if (mantissa > UPPER_BOUND || mantissa < -UPPER_BOUND)
551  return false; /* overflow */
552 
553  if (amount_out)
554  *amount_out = mantissa;
555 
556  return true;
557 }
558 
559 std::string ToLower(const std::string& str)
560 {
561  std::string r;
562  for (auto ch : str) r += ToLower((unsigned char)ch);
563  return r;
564 }
565 
566 std::string ToUpper(const std::string& str)
567 {
568  std::string r;
569  for (auto ch : str) r += ToUpper((unsigned char)ch);
570  return r;
571 }
572 
573 std::string Capitalize(std::string str)
574 {
575  if (str.empty()) return str;
576  str[0] = ToUpper(str.front());
577  return str;
578 }
579 
580 std::string HexStr(const Span<const uint8_t> s)
581 {
582  std::string rv;
583  static constexpr char hexmap[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
584  '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
585  rv.reserve(s.size() * 2);
586  for (uint8_t v: s) {
587  rv.push_back(hexmap[v >> 4]);
588  rv.push_back(hexmap[v & 15]);
589  }
590  return rv;
591 }
std::string SanitizeString(const std::string &str, int rule)
Remove unsafe chars.
static bool ProcessMantissaDigit(char ch, int64_t &mantissa, int &mantissa_tzeros)
Helper function for ParseFixedPoint.
std::string Capitalize(std::string str)
Capitalizes the first character of the given string.
std::string FormatParagraph(const std::string &in, size_t width, size_t indent)
Format a paragraph of text to a fixed width, adding spaces for indentation to any added line...
std::deque< CInv >::iterator it
std::string ToLower(const std::string &str)
Returns the lowercase equivalent of the given string.
constexpr C * end() const noexcept
Definition: span.h:142
std::string ToUpper(const std::string &str)
Returns the uppercase equivalent of the given string.
signed char HexDigit(char c)
NODISCARD bool ValidAsCString(const std::string &str) noexcept
Check if a string does not contain any embedded NUL (\0) characters.
Definition: string.h:62
static const std::string CHARS_ALPHA_NUM
bool ParseUInt32(const std::string &str, uint32_t *out)
Convert decimal string to unsigned 32-bit integer with strict parse error feedback.
std::vector< unsigned char > ParseHex(const char *psz)
constexpr std::size_t size() const noexcept
Definition: span.h:153
constexpr bool IsDigit(char c)
Tests if the given character is a decimal digit.
Definition: strencodings.h:79
std::vector< unsigned char > DecodeBase32(const char *p, bool *pf_invalid)
std::vector< unsigned char > DecodeBase64(const char *p, bool *pf_invalid)
bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out)
Parse number as fixed point according to JSON number syntax.
bool ParseInt64(const std::string &str, int64_t *out)
Convert string to signed 64-bit integer with strict parse error feedback.
std::string EncodeBase64(Span< const unsigned char > input)
constexpr auto MakeUCharSpan(V &&v) -> decltype(UCharSpanCast(MakeSpan(std::forward< V >(v))))
Like MakeSpan, but for (const) unsigned char member types only.
Definition: span.h:220
static const std::string SAFE_CHARS[]
bool ParseUInt64(const std::string &str, uint64_t *out)
Convert decimal string to unsigned 64-bit integer with strict parse error feedback.
#define NODISCARD
Definition: attributes.h:18
int atoi(const std::string &str)
bool IsHex(const std::string &str)
bool ParseInt32(const std::string &str, int32_t *out)
Convert string to signed 32-bit integer with strict parse error feedback.
static const int64_t UPPER_BOUND
Upper bound for mantissa.
bool IsHexNumber(const std::string &str)
Return true if the string is a hex number, optionally prefixed with "0x".
std::string HexStr(const Span< const uint8_t > s)
Convert a span of bytes to a lower-case hexadecimal string.
int64_t atoi64(const std::string &str)
std::string EncodeBase32(Span< const unsigned char > input, bool pad)
Base32 encode.
constexpr C * begin() const noexcept
Definition: span.h:141
bool ParseDouble(const std::string &str, double *out)
Convert string to double with strict parse error feedback.
constexpr bool IsSpace(char c) noexcept
Tests if the given character is a whitespace character.
Definition: strencodings.h:95
static NODISCARD bool ParsePrechecks(const std::string &str)
const signed char p_util_hexdigit[256]
bool ParseUInt8(const std::string &str, uint8_t *out)
Convert decimal string to unsigned 8-bit integer with strict parse error feedback.
A Span is an object that can refer to a contiguous sequence of objects.
Definition: span.h:82
void SplitHostPort(std::string in, int &portOut, std::string &hostOut)