1 files changed, 294 insertions, 0 deletions
diff --git a/Source/cmCommandArgumentParserHelper.cxx b/Source/cmCommandArgumentParserHelper.cxx
new file mode 100644
index 0000000..deddba8
--- /dev/null
+++ b/Source/cmCommandArgumentParserHelper.cxx
@@ -0,0 +1,294 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmCommandArgumentParserHelper.h"
+
+#include <cstring>
+#include <iostream>
+#include <sstream>
+#include <utility>
+
+#include <cm/memory>
+#include <cm/optional>
+#include <cmext/string_view>
+
+#include "cmCommandArgumentLexer.h"
+#include "cmListFileCache.h"
+#include "cmMakefile.h"
+#include "cmProperty.h"
+#include "cmState.h"
+#include "cmStringAlgorithms.h"
+#include "cmSystemTools.h"
+
+int cmCommandArgument_yyparse(yyscan_t yyscanner);
+//
+cmCommandArgumentParserHelper::cmCommandArgumentParserHelper()
+{
+  this->FileLine = -1;
+  this->FileName = nullptr;
+  this->RemoveEmpty = true;
+
+  this->NoEscapeMode = false;
+  this->ReplaceAtSyntax = false;
+}
+
+cmCommandArgumentParserHelper::~cmCommandArgumentParserHelper()
+{
+  this->CleanupParser();
+}
+
+void cmCommandArgumentParserHelper::SetLineFile(long line, const char* file)
+{
+  this->FileLine = line;
+  this->FileName = file;
+}
+
+const char* cmCommandArgumentParserHelper::AddString(const std::string& str)
+{
+  if (str.empty()) {
+    return "";
+  }
+  auto stVal = cm::make_unique<char[]>(str.size() + 1);
+  strcpy(stVal.get(), str.c_str());
+  this->Variables.push_back(std::move(stVal));
+  return this->Variables.back().get();
+}
+
+const char* cmCommandArgumentParserHelper::ExpandSpecialVariable(
+  const char* key, const char* var)
+{
+  if (!key) {
+    return this->ExpandVariable(var);
+  }
+  if (!var) {
+    return "";
+  }
+  if (strcmp(key, "ENV") == 0) {
+    std::string str;
+    if (cmSystemTools::GetEnv(var, str)) {
+      if (this->EscapeQuotes) {
+        return this->AddString(cmEscapeQuotes(str));
+      }
+      return this->AddString(str);
+    }
+    return "";
+  }
+  if (strcmp(key, "CACHE") == 0) {
+    if (cmProp c = this->Makefile->GetState()->GetInitializedCacheValue(var)) {
+      if (this->EscapeQuotes) {
+        return this->AddString(cmEscapeQuotes(*c));
+      }
+      return this->AddString(*c);
+    }
+    return "";
+  }
+  std::ostringstream e;
+  e << "Syntax $" << key << "{} is not supported.  "
+    << "Only ${}, $ENV{}, and $CACHE{} are allowed.";
+  this->SetError(e.str());
+  return nullptr;
+}
+
+const char* cmCommandArgumentParserHelper::ExpandVariable(const char* var)
+{
+  if (!var) {
+    return nullptr;
+  }
+  if (this->FileLine >= 0 && strcmp(var, "CMAKE_CURRENT_LIST_LINE") == 0) {
+    std::string line;
+    cmListFileContext const& top = this->Makefile->GetBacktrace().Top();
+    if (top.DeferId) {
+      line = cmStrCat("DEFERRED:"_s, *top.DeferId);
+    } else {
+      line = std::to_string(this->FileLine);
+    }
+    return this->AddString(line);
+  }
+  cmProp value = this->Makefile->GetDefinition(var);
+  if (!value) {
+    this->Makefile->MaybeWarnUninitialized(var, this->FileName);
+    if (!this->RemoveEmpty) {
+      return nullptr;
+    }
+  }
+  if (this->EscapeQuotes && value) {
+    return this->AddString(cmEscapeQuotes(*value));
+  }
+  return this->AddString(cmToCStrSafe(value));
+}
+
+const char* cmCommandArgumentParserHelper::ExpandVariableForAt(const char* var)
+{
+  if (this->ReplaceAtSyntax) {
+    // try to expand the variable
+    const char* ret = this->ExpandVariable(var);
+    // if the return was 0 and we want to replace empty strings
+    // then return an empty string
+    if (!ret && this->RemoveEmpty) {
+      return this->AddString("");
+    }
+    // if the ret was not 0, then return it
+    if (ret) {
+      return ret;
+    }
+  }
+  // at this point we want to put it back because of one of these cases:
+  // - this->ReplaceAtSyntax is false
+  // - this->ReplaceAtSyntax is true, but this->RemoveEmpty is false,
+  //   and the variable was not defined
+  std::string ref = cmStrCat('@', var, '@');
+  return this->AddString(ref);
+}
+
+const char* cmCommandArgumentParserHelper::CombineUnions(const char* in1,
+                                                         const char* in2)
+{
+  if (!in1) {
+    return in2;
+  }
+  if (!in2) {
+    return in1;
+  }
+  size_t len = strlen(in1) + strlen(in2) + 1;
+  auto out = cm::make_unique<char[]>(len);
+  strcpy(out.get(), in1);
+  strcat(out.get(), in2);
+  this->Variables.push_back(std::move(out));
+  return this->Variables.back().get();
+}
+
+void cmCommandArgumentParserHelper::AllocateParserType(
+  cmCommandArgumentParserHelper::ParserType* pt, const char* str, int len)
+{
+  pt->str = nullptr;
+  if (len == 0) {
+    len = static_cast<int>(strlen(str));
+  }
+  if (len == 0) {
+    return;
+  }
+  auto out = cm::make_unique<char[]>(len + 1);
+  memcpy(out.get(), str, len);
+  out.get()[len] = 0;
+  pt->str = out.get();
+  this->Variables.push_back(std::move(out));
+}
+
+bool cmCommandArgumentParserHelper::HandleEscapeSymbol(
+  cmCommandArgumentParserHelper::ParserType* pt, char symbol)
+{
+  switch (symbol) {
+    case '\\':
+    case '"':
+    case ' ':
+    case '#':
+    case '(':
+    case ')':
+    case '$':
+    case '@':
+    case '^':
+      this->AllocateParserType(pt, &symbol, 1);
+      break;
+    case ';':
+      this->AllocateParserType(pt, "\\;", 2);
+      break;
+    case 't':
+      this->AllocateParserType(pt, "\t", 1);
+      break;
+    case 'n':
+      this->AllocateParserType(pt, "\n", 1);
+      break;
+    case 'r':
+      this->AllocateParserType(pt, "\r", 1);
+      break;
+    case '0':
+      this->AllocateParserType(pt, "\0", 1);
+      break;
+    default: {
+      std::ostringstream e;
+      e << "Invalid escape sequence \\" << symbol;
+      this->SetError(e.str());
+    }
+      return false;
+  }
+  return true;
+}
+
+void cmCommandArgument_SetupEscapes(yyscan_t yyscanner, bool noEscapes);
+
+int cmCommandArgumentParserHelper::ParseString(std::string const& str,
+                                               int verb)
+{
+  if (str.empty()) {
+    return 0;
+  }
+  this->InputSize = str.size();
+  this->Verbose = verb;
+
+  this->Result.clear();
+
+  yyscan_t yyscanner;
+  cmCommandArgument_yylex_init(&yyscanner);
+  auto* scanBuf = cmCommandArgument_yy_scan_string(str.c_str(), yyscanner);
+  cmCommandArgument_yyset_extra(this, yyscanner);
+  cmCommandArgument_SetupEscapes(yyscanner, this->NoEscapeMode);
+  int res = cmCommandArgument_yyparse(yyscanner);
+  cmCommandArgument_yy_delete_buffer(scanBuf, yyscanner);
+  cmCommandArgument_yylex_destroy(yyscanner);
+  if (res != 0) {
+    return 0;
+  }
+
+  this->CleanupParser();
+
+  if (this->Verbose) {
+    std::cerr << "Expanding [" << str << "] produced: [" << this->Result << "]"
+              << std::endl;
+  }
+  return 1;
+}
+
+void cmCommandArgumentParserHelper::CleanupParser()
+{
+  this->Variables.clear();
+}
+
+void cmCommandArgumentParserHelper::Error(const char* str)
+{
+  auto pos = this->InputBufferPos;
+  auto const isEof = (this->InputSize < this->InputBufferPos);
+  if (!isEof) {
+    pos -= this->LastTokenLength;
+  }
+
+  std::ostringstream ostr;
+  ostr << str << " (" << pos << ")";
+  this->SetError(ostr.str());
+}
+
+void cmCommandArgumentParserHelper::SetMakefile(const cmMakefile* mf)
+{
+  this->Makefile = mf;
+}
+
+void cmCommandArgumentParserHelper::SetResult(const char* value)
+{
+  if (!value) {
+    this->Result.clear();
+    return;
+  }
+  this->Result = value;
+}
+
+void cmCommandArgumentParserHelper::SetError(std::string const& msg)
+{
+  // Keep only the first error.
+  if (this->ErrorString.empty()) {
+    this->ErrorString = msg;
+  }
+}
+
+void cmCommandArgumentParserHelper::UpdateInputPosition(int const tokenLength)
+{
+  this->InputBufferPos += tokenLength;
+  this->LastTokenLength = tokenLength;
+}