1 files changed, 291 insertions, 0 deletions
diff --git a/Source/cmCommandArgumentParserHelper.cxx b/Source/cmCommandArgumentParserHelper.cxx
new file mode 100644
index 0000000..ca29967
--- /dev/null
+++ b/Source/cmCommandArgumentParserHelper.cxx
@@ -0,0 +1,291 @@
+/* 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 "cmCommandArgumentLexer.h"
+#include "cmMakefile.h"
+#include "cmState.h"
+#include "cmSystemTools.h"
+
+#include <iostream>
+#include <sstream>
+#include <string.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 "";
+  }
+  char* stVal = new char[str.size() + 1];
+  strcpy(stVal, str.c_str());
+  this->Variables.push_back(stVal);
+  return stVal;
+}
+
+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(cmSystemTools::EscapeQuotes(str));
+      }
+      return this->AddString(str);
+    }
+    return "";
+  }
+  if (strcmp(key, "CACHE") == 0) {
+    if (const std::string* c =
+          this->Makefile->GetState()->GetInitializedCacheValue(var)) {
+      if (this->EscapeQuotes) {
+        return this->AddString(cmSystemTools::EscapeQuotes(*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::ostringstream ostr;
+    ostr << this->FileLine;
+    return this->AddString(ostr.str());
+  }
+  const char* 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(cmSystemTools::EscapeQuotes(value));
+  }
+  return this->AddString(value ? 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 = "@";
+  ref += var;
+  ref += "@";
+  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;
+  char* out = new char[len];
+  strcpy(out, in1);
+  strcat(out, in2);
+  this->Variables.push_back(out);
+  return out;
+}
+
+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;
+  }
+  char* out = new char[len + 1];
+  memcpy(out, str, len);
+  out[len] = 0;
+  pt->str = out;
+  this->Variables.push_back(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(const char* str, int verb)
+{
+  if (!str) {
+    return 0;
+  }
+  this->Verbose = verb;
+  this->InputBuffer = str;
+  this->InputBufferPos = 0;
+  this->CurrentLine = 0;
+
+  this->Result.clear();
+
+  yyscan_t yyscanner;
+  cmCommandArgument_yylex_init(&yyscanner);
+  cmCommandArgument_yyset_extra(this, yyscanner);
+  cmCommandArgument_SetupEscapes(yyscanner, this->NoEscapeMode);
+  int res = cmCommandArgument_yyparse(yyscanner);
+  cmCommandArgument_yylex_destroy(yyscanner);
+  if (res != 0) {
+    return 0;
+  }
+
+  this->CleanupParser();
+
+  if (Verbose) {
+    std::cerr << "Expanding [" << str << "] produced: [" << this->Result << "]"
+              << std::endl;
+  }
+  return 1;
+}
+
+void cmCommandArgumentParserHelper::CleanupParser()
+{
+  for (char* var : this->Variables) {
+    delete[] var;
+  }
+  this->Variables.erase(this->Variables.begin(), this->Variables.end());
+}
+
+int cmCommandArgumentParserHelper::LexInput(char* buf, int maxlen)
+{
+  if (maxlen < 1) {
+    return 0;
+  }
+  if (this->InputBufferPos < this->InputBuffer.size()) {
+    buf[0] = this->InputBuffer[this->InputBufferPos++];
+    if (buf[0] == '\n') {
+      this->CurrentLine++;
+    }
+    return (1);
+  }
+  buf[0] = '\n';
+  return (0);
+}
+
+void cmCommandArgumentParserHelper::Error(const char* str)
+{
+  unsigned long pos = static_cast<unsigned long>(this->InputBufferPos);
+  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;
+  }
+}