File: c_helpers.cc

package info (click to toggle)
protobuf-c 1.3.1-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 2,500 kB
  • sloc: ansic: 5,070; sh: 4,241; cpp: 3,647; makefile: 218; xml: 181
file content (573 lines) | stat: -rw-r--r-- 19,131 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

// Copyright (c) 2008-2013, Dave Benson.  All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Modified to implement C code by Dave Benson.

#include <memory>
#include <vector>
#include <set>
#include <stdio.h>		// for snprintf
#include <float.h>

#include <protoc-c/c_helpers.h>
#include <google/protobuf/stubs/common.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace c {

#if defined(_MSC_VER)
// FIXME: In the case where the generated string is longer than the buffer,
// _snprint() returns a negative value, where snprintf() returns the number
// of characters that *would* have been stored, had there been room.
// That is fundamental, as it allows snprintf() to be used to find the size
// necessary for the buffer, simply by calling it with the size of the buffer
// passed in as zero.
// Note: at the present moment return value isn't used in the code.
#define snprintf _snprintf
#pragma warning(disable:4800)
#pragma warning(disable:4996)
#endif

string DotsToUnderscores(const string& name) {
  return StringReplace(name, ".", "_", true);
}

string DotsToColons(const string& name) {
  return StringReplace(name, ".", "::", true);
}

string SimpleFtoa(float f) {
  char buf[100];
  snprintf(buf,sizeof(buf),"%.*g", FLT_DIG, f);
  buf[sizeof(buf)-1] = 0;		/* should NOT be necessary */
  return buf;
}
string SimpleDtoa(double d) {
  char buf[100];
  snprintf(buf,sizeof(buf),"%.*g", DBL_DIG, d);
  buf[sizeof(buf)-1] = 0;		/* should NOT be necessary */
  return buf;
}

string CamelToUpper(const string &name) {
  bool was_upper = true;		// suppress initial _
  string rv = "";
  int len = name.length();
  for (int i = 0; i < len; i++) {
    bool is_upper = isupper(name[i]);
    if (is_upper) {
      if (!was_upper)
	rv += '_';
      rv += name[i];
    } else {
      rv += toupper(name[i]);
    }
    was_upper = is_upper;
  }
  return rv;
}
string CamelToLower(const string &name) {
  bool was_upper = true;		// suppress initial _
  string rv = "";
  int len = name.length();
  for (int i = 0; i < len; i++) {
    bool is_upper = isupper(name[i]);
    if (is_upper) {
      if (!was_upper)
	rv += '_';
      rv += tolower(name[i]);
    } else {
      rv += name[i];
    }
    was_upper = is_upper;
  }
  return rv;
}


string ToUpper(const string &name) {
  string rv = "";
  int len = name.length();
  for (int i = 0; i < len; i++) {
    rv += toupper(name[i]);
  }
  return rv;
}
string ToLower(const string &name) {
  string rv = "";
  int len = name.length();
  for (int i = 0; i < len; i++) {
    rv += tolower(name[i]);
  }
  return rv;
}
string ToCamel(const string &name) {
  string rv = "";
  int len = name.length();
  bool next_is_upper = true;
  for (int i = 0; i < len; i++) {
    if (name[i] == '_') {
      next_is_upper = true;
    } else if (next_is_upper) {
      rv += toupper (name[i]);
      next_is_upper = false;
    } else {
      rv += name[i];
    }
  }
  return rv;
}

string FullNameToLower(const string &full_name) {
  std::vector<string> pieces;
  SplitStringUsing(full_name, ".", &pieces);
  string rv = "";
  for (unsigned i = 0; i < pieces.size(); i++) {
    if (pieces[i] == "") continue;
    if (rv != "") rv += "__";
    rv += CamelToLower(pieces[i]);
  }
  return rv;
}
string FullNameToUpper(const string &full_name) {
  std::vector<string> pieces;
  SplitStringUsing(full_name, ".", &pieces);
  string rv = "";
  for (unsigned i = 0; i < pieces.size(); i++) {
    if (pieces[i] == "") continue;
    if (rv != "") rv += "__";
    rv += CamelToUpper(pieces[i]);
  }
  return rv;
}
string FullNameToC(const string &full_name) {
  std::vector<string> pieces;
  SplitStringUsing(full_name, ".", &pieces);
  string rv = "";
  for (unsigned i = 0; i < pieces.size(); i++) {
    if (pieces[i] == "") continue;
    if (rv != "") rv += "__";
    rv += ToCamel(pieces[i]);
  }
  return rv;
}

void PrintComment (io::Printer* printer, string comment)
{
   if (!comment.empty())
   {
      std::vector<string> comment_lines;
      SplitStringUsing (comment, "\r\n", &comment_lines);
      printer->Print ("/*\n");
      for (int i = 0; i < comment_lines.size(); i++)
      {
         if (!comment_lines[i].empty())
         {
            /* Make sure we don't inadvertently close the comment block */
            if (comment_lines[i][0] == '/')
               comment_lines[i] = ' ' + comment_lines[i];

            /* Or cause other compiler issues. */
            size_t delim_i;
            while ((delim_i = comment_lines[i].find("/*")) != string::npos)
               comment_lines[i][delim_i] = ' ';

            while ((delim_i = comment_lines[i].find("*/")) != string::npos)
               comment_lines[i][delim_i + 1] = ' ';

            printer->Print (" *$line$\n", "line", comment_lines[i]);
         }
      }
      printer->Print (" */\n");
   }
}

string ConvertToSpaces(const string &input) {
  return string(input.size(), ' ');
}

int compare_name_indices_by_name(const void *a, const void *b)
{
  const NameIndex *ni_a = (const NameIndex *) a;
  const NameIndex *ni_b = (const NameIndex *) b;
  return strcmp (ni_a->name, ni_b->name);
}


string CEscape(const string& src);

const char* const kKeywordList[] = {
  "and", "and_eq", "asm", "auto", "bitand", "bitor", "bool", "break", "case",
  "catch", "char", "class", "compl", "const", "const_cast", "continue",
  "default", "delete", "do", "double", "dynamic_cast", "else", "enum",
  "explicit", "extern", "false", "float", "for", "friend", "goto", "if",
  "inline", "int", "long", "mutable", "namespace", "new", "not", "not_eq",
  "operator", "or", "or_eq", "private", "protected", "public", "register",
  "reinterpret_cast", "return", "short", "signed", "sizeof", "static",
  "static_cast", "struct", "switch", "template", "this", "throw", "true", "try",
  "typedef", "typeid", "typename", "union", "unsigned", "using", "virtual",
  "void", "volatile", "wchar_t", "while", "xor", "xor_eq"
};

std::set<string> MakeKeywordsMap() {
  std::set<string> result;
  for (int i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
    result.insert(kKeywordList[i]);
  }
  return result;
}

std::set<string> kKeywords = MakeKeywordsMap();

string ClassName(const Descriptor* descriptor, bool qualified) {
  // Find "outer", the descriptor of the top-level message in which
  // "descriptor" is embedded.
  const Descriptor* outer = descriptor;
  while (outer->containing_type() != NULL) outer = outer->containing_type();

  const string& outer_name = outer->full_name();
  string inner_name = descriptor->full_name().substr(outer_name.size());

  if (qualified) {
    return "::" + DotsToColons(outer_name) + DotsToUnderscores(inner_name);
  } else {
    return outer->name() + DotsToUnderscores(inner_name);
  }
}

string ClassName(const EnumDescriptor* enum_descriptor, bool qualified) {
  if (enum_descriptor->containing_type() == NULL) {
    if (qualified) {
      return DotsToColons(enum_descriptor->full_name());
    } else {
      return enum_descriptor->name();
    }
  } else {
    string result = ClassName(enum_descriptor->containing_type(), qualified);
    result += '_';
    result += enum_descriptor->name();
    return result;
  }
}

string FieldName(const FieldDescriptor* field) {
  string result = ToLower(field->name());
  if (kKeywords.count(result) > 0) {
    result.append("_");
  }
  return result;
}

string FieldDeprecated(const FieldDescriptor* field) {
  if (field->options().deprecated()) {
    return " PROTOBUF_C__DEPRECATED";
  }
  return "";
}

string StripProto(const string& filename) {
  if (HasSuffixString(filename, ".protodevel")) {
    return StripSuffixString(filename, ".protodevel");
  } else {
    return StripSuffixString(filename, ".proto");
  }
}

// Convert a file name into a valid identifier.
string FilenameIdentifier(const string& filename) {
  string result;
  for (unsigned i = 0; i < filename.size(); i++) {
    if (isalnum(filename[i])) {
      result.push_back(filename[i]);
    } else {
      // Not alphanumeric.  To avoid any possibility of name conflicts we
      // use the hex code for the character.
      result.push_back('_');
      char buffer[32];
      result.append(FastHexToBuffer(static_cast<uint8>(filename[i]), buffer));
    }
  }
  return result;
}

// Return the name of the BuildDescriptors() function for a given file.
string GlobalBuildDescriptorsName(const string& filename) {
  return "proto_BuildDescriptors_" + FilenameIdentifier(filename);
}

string GetLabelName(FieldDescriptor::Label label) {
  switch (label) {
    case FieldDescriptor::LABEL_OPTIONAL: return "optional";
    case FieldDescriptor::LABEL_REQUIRED: return "required";
    case FieldDescriptor::LABEL_REPEATED: return "repeated";
  }
  return "bad-label";
}

unsigned
WriteIntRanges(io::Printer* printer, int n_values, const int *values, const string &name)
{
  std::map<string, string> vars;
  vars["name"] = name;
  if (n_values > 0) {
    int n_ranges = 1;
    for (int i = 1; i < n_values; i++) {
      if (values[i-1] + 1 != values[i])
        n_ranges++;
    }
    vars["n_ranges"] = SimpleItoa(n_ranges);
    printer->Print(vars, "static const ProtobufCIntRange $name$[$n_ranges$ + 1] =\n"
                         "{\n");
    int last_range_start = 0;
    for (int i = 1; i < n_values; i++) {
      if (values[i-1] + 1 != values[i]) {
        int count = i - last_range_start;
	int expected = values[i-1] + 1;
        vars["start_value"] = SimpleItoa(expected - count);
        vars["orig_offset"] = SimpleItoa(last_range_start);
        printer->Print (vars, "  { $start_value$, $orig_offset$ },\n");
	last_range_start = i;
      }
    }
    // write last real entry
    {
      int i = n_values;
      int count = i - last_range_start;
      int expected = values[i-1] + 1;
      vars["start_value"] = SimpleItoa(expected - count);
      vars["orig_offset"] = SimpleItoa(last_range_start);
      printer->Print (vars, "  { $start_value$, $orig_offset$ },\n");
    }
    // write sentinel entry
    vars["n_entries"] = SimpleItoa(n_values);
    printer->Print (vars, "  { 0, $n_entries$ }\n");
    printer->Print (vars, "};\n");
    return n_ranges;
  } else {
    printer->Print (vars, "#define $name$ NULL\n");
    return 0;
  }
}
    


// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx
// XXXXXXXXX  this stuff is copied from strutils.cc !!!!   XXXXXXXXXXXXXXXXXXXXXXXXXXXXx
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx
// ----------------------------------------------------------------------
// StringReplace()
//    Replace the "old" pattern with the "new" pattern in a string,
//    and append the result to "res".  If replace_all is false,
//    it only replaces the first instance of "old."
// ----------------------------------------------------------------------

void StringReplace(const string& s, const string& oldsub,
                   const string& newsub, bool replace_all,
                   string* res) {
  if (oldsub.empty()) {
    res->append(s);  // if empty, append the given string.
    return;
  }

  string::size_type start_pos = 0;
  string::size_type pos;
  do {
    pos = s.find(oldsub, start_pos);
    if (pos == string::npos) {
      break;
    }
    res->append(s, start_pos, pos - start_pos);
    res->append(newsub);
    start_pos = pos + oldsub.size();  // start searching again after the "old"
  } while (replace_all);
  res->append(s, start_pos, s.length() - start_pos);
}


// ----------------------------------------------------------------------
// StringReplace()
//    Give me a string and two patterns "old" and "new", and I replace
//    the first instance of "old" in the string with "new", if it
//    exists.  If "global" is true; call this repeatedly until it
//    fails.  RETURN a new string, regardless of whether the replacement
//    happened or not.
// ----------------------------------------------------------------------

string StringReplace(const string& s, const string& oldsub,
                     const string& newsub, bool replace_all) {
  string ret;
  StringReplace(s, oldsub, newsub, replace_all, &ret);
  return ret;
}

// ----------------------------------------------------------------------
// SplitStringUsing()
//    Split a string using a character delimiter. Append the components
//    to 'result'.
//
// Note: For multi-character delimiters, this routine will split on *ANY* of
// the characters in the string, not the entire string as a single delimiter.
// ----------------------------------------------------------------------
template <typename ITR>
static inline
void SplitStringToIteratorUsing(const string& full,
                                const char* delim,
                                ITR& result) {
  // Optimize the common case where delim is a single character.
  if (delim[0] != '\0' && delim[1] == '\0') {
    char c = delim[0];
    const char* p = full.data();
    const char* end = p + full.size();
    while (p != end) {
      if (*p == c) {
        ++p;
      } else {
        const char* start = p;
        while (++p != end && *p != c);
        *result++ = string(start, p - start);
      }
    }
    return;
  }

  string::size_type begin_index, end_index;
  begin_index = full.find_first_not_of(delim);
  while (begin_index != string::npos) {
    end_index = full.find_first_of(delim, begin_index);
    if (end_index == string::npos) {
      *result++ = full.substr(begin_index);
      return;
    }
    *result++ = full.substr(begin_index, (end_index - begin_index));
    begin_index = full.find_first_not_of(delim, end_index);
  }
}

void SplitStringUsing(const string& full,
                      const char* delim,
                      std::vector<string>* result) {
  std::back_insert_iterator< std::vector<string> > it(*result);
  SplitStringToIteratorUsing(full, delim, it);
}

char* FastHexToBuffer(int i, char* buffer)
{
  snprintf(buffer, 16, "%x", i);
  return buffer;
}


static int CEscapeInternal(const char* src, int src_len, char* dest,
                           int dest_len, bool use_hex) {
  const char* src_end = src + src_len;
  int used = 0;
  bool last_hex_escape = false; // true if last output char was \xNN

  for (; src < src_end; src++) {
    if (dest_len - used < 2)   // Need space for two letter escape
      return -1;

    bool is_hex_escape = false;
    switch (*src) {
      case '\n': dest[used++] = '\\'; dest[used++] = 'n';  break;
      case '\r': dest[used++] = '\\'; dest[used++] = 'r';  break;
      case '\t': dest[used++] = '\\'; dest[used++] = 't';  break;
      case '\"': dest[used++] = '\\'; dest[used++] = '\"'; break;
      case '\'': dest[used++] = '\\'; dest[used++] = '\''; break;
      case '\\': dest[used++] = '\\'; dest[used++] = '\\'; break;
      default:
        // Note that if we emit \xNN and the src character after that is a hex
        // digit then that digit must be escaped too to prevent it being
        // interpreted as part of the character code by C.
        if (!isprint(*src) || (last_hex_escape && isxdigit(*src))) {
          if (dest_len - used < 4) // need space for 4 letter escape
            return -1;
          sprintf(dest + used, (use_hex ? "\\x%02x" : "\\%03o"),
                  static_cast<uint8>(*src));
          is_hex_escape = use_hex;
          used += 4;
        } else {
          dest[used++] = *src; break;
        }
    }
    last_hex_escape = is_hex_escape;
  }

  if (dest_len - used < 1)   // make sure that there is room for \0
    return -1;

  dest[used] = '\0';   // doesn't count towards return value though
  return used;
}
string CEscape(const string& src) {
  const int dest_length = src.size() * 4 + 1; // Maximum possible expansion
  std::unique_ptr<char[]> dest(new char[dest_length]);
  const int len = CEscapeInternal(src.data(), src.size(),
                                  dest.get(), dest_length, false);
  GOOGLE_DCHECK_GE(len, 0);
  return string(dest.get(), len);
}

}  // namespace c
}  // namespace compiler
}  // namespace protobuf
}  // namespace google