1 files changed, 255 insertions, 0 deletions
diff --git a/Source/kwsys/IOStream.cxx b/Source/kwsys/IOStream.cxx
new file mode 100644
index 0000000..e21f87d
--- /dev/null
+++ b/Source/kwsys/IOStream.cxx
@@ -0,0 +1,255 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#include "kwsysPrivate.h"
+#include KWSYS_HEADER(Configure.hxx)
+
+// Include the streams library.
+#include <iostream>
+#include KWSYS_HEADER(IOStream.hxx)
+
+// Work-around CMake dependency scanning limitation.  This must
+// duplicate the above list of headers.
+#if 0
+#  include "Configure.hxx.in"
+#  include "IOStream.hxx.in"
+#endif
+
+// Implement the rest of this file only if it is needed.
+#if KWSYS_IOS_NEED_OPERATORS_LL
+
+#  include <stdio.h>  // sscanf, sprintf
+#  include <string.h> // memchr
+
+#  if defined(_MAX_INT_DIG)
+#    define KWSYS_IOS_INT64_MAX_DIG _MAX_INT_DIG
+#  else
+#    define KWSYS_IOS_INT64_MAX_DIG 32
+#  endif
+
+namespace KWSYS_NAMESPACE {
+
+// Scan an input stream for an integer value.
+static int IOStreamScanStream(std::istream& is, char* buffer)
+{
+  // Prepare to write to buffer.
+  char* out = buffer;
+  char* end = buffer + KWSYS_IOS_INT64_MAX_DIG - 1;
+
+  // Look for leading sign.
+  if (is.peek() == '+') {
+    *out++ = '+';
+    is.ignore();
+  } else if (is.peek() == '-') {
+    *out++ = '-';
+    is.ignore();
+  }
+
+  // Determine the base.  If not specified in the stream, try to
+  // detect it from the input.  A leading 0x means hex, and a leading
+  // 0 alone means octal.
+  int base = 0;
+  int flags = is.flags() & std::ios_base::basefield;
+  if (flags == std::ios_base::oct) {
+    base = 8;
+  } else if (flags == std::ios_base::dec) {
+    base = 10;
+  } else if (flags == std::ios_base::hex) {
+    base = 16;
+  }
+  bool foundDigit = false;
+  bool foundNonZero = false;
+  if (is.peek() == '0') {
+    foundDigit = true;
+    is.ignore();
+    if ((is.peek() == 'x' || is.peek() == 'X') && (base == 0 || base == 16)) {
+      base = 16;
+      foundDigit = false;
+      is.ignore();
+    } else if (base == 0) {
+      base = 8;
+    }
+  }
+
+  // Determine the range of digits allowed for this number.
+  const char* digits = "0123456789abcdefABCDEF";
+  int maxDigitIndex = 10;
+  if (base == 8) {
+    maxDigitIndex = 8;
+  } else if (base == 16) {
+    maxDigitIndex = 10 + 6 + 6;
+  }
+
+  // Scan until an invalid digit is found.
+  for (; is.peek() != EOF; is.ignore()) {
+    if (memchr(digits, *out = (char)is.peek(), maxDigitIndex) != 0) {
+      if ((foundNonZero || *out != '0') && out < end) {
+        ++out;
+        foundNonZero = true;
+      }
+      foundDigit = true;
+    } else {
+      break;
+    }
+  }
+
+  // Correct the buffer contents for degenerate cases.
+  if (foundDigit && !foundNonZero) {
+    *out++ = '0';
+  } else if (!foundDigit) {
+    out = buffer;
+  }
+
+  // Terminate the string in the buffer.
+  *out = '\0';
+
+  return base;
+}
+
+// Read an integer value from an input stream.
+template <class T>
+std::istream& IOStreamScanTemplate(std::istream& is, T& value, char type)
+{
+  int state = std::ios_base::goodbit;
+
+  // Skip leading whitespace.
+  std::istream::sentry okay(is);
+
+  if (okay) {
+    try {
+      // Copy the string to a buffer and construct the format string.
+      char buffer[KWSYS_IOS_INT64_MAX_DIG];
+#  if defined(_MSC_VER)
+      char format[] = "%I64_";
+      const int typeIndex = 4;
+#  else
+      char format[] = "%ll_";
+      const int typeIndex = 3;
+#  endif
+      switch (IOStreamScanStream(is, buffer)) {
+        case 8:
+          format[typeIndex] = 'o';
+          break;
+        case 0: // Default to decimal if not told otherwise.
+        case 10:
+          format[typeIndex] = type;
+          break;
+        case 16:
+          format[typeIndex] = 'x';
+          break;
+      };
+
+      // Use sscanf to parse the number from the buffer.
+      T result;
+      int success = (sscanf(buffer, format, &result) == 1) ? 1 : 0;
+
+      // Set flags for resulting state.
+      if (is.peek() == EOF) {
+        state |= std::ios_base::eofbit;
+      }
+      if (!success) {
+        state |= std::ios_base::failbit;
+      } else {
+        value = result;
+      }
+    } catch (...) {
+      state |= std::ios_base::badbit;
+    }
+  }
+
+  is.setstate(std::ios_base::iostate(state));
+  return is;
+}
+
+// Print an integer value to an output stream.
+template <class T>
+std::ostream& IOStreamPrintTemplate(std::ostream& os, T value, char type)
+{
+  std::ostream::sentry okay(os);
+  if (okay) {
+    try {
+      // Construct the format string.
+      char format[8];
+      char* f = format;
+      *f++ = '%';
+      if (os.flags() & std::ios_base::showpos) {
+        *f++ = '+';
+      }
+      if (os.flags() & std::ios_base::showbase) {
+        *f++ = '#';
+      }
+#  if defined(_MSC_VER)
+      *f++ = 'I';
+      *f++ = '6';
+      *f++ = '4';
+#  else
+      *f++ = 'l';
+      *f++ = 'l';
+#  endif
+      long bflags = os.flags() & std::ios_base::basefield;
+      if (bflags == std::ios_base::oct) {
+        *f++ = 'o';
+      } else if (bflags != std::ios_base::hex) {
+        *f++ = type;
+      } else if (os.flags() & std::ios_base::uppercase) {
+        *f++ = 'X';
+      } else {
+        *f++ = 'x';
+      }
+      *f = '\0';
+
+      // Use sprintf to print to a buffer and then write the
+      // buffer to the stream.
+      char buffer[2 * KWSYS_IOS_INT64_MAX_DIG];
+      sprintf(buffer, format, value);
+      os << buffer;
+    } catch (...) {
+      os.clear(os.rdstate() | std::ios_base::badbit);
+    }
+  }
+  return os;
+}
+
+#  if !KWSYS_IOS_HAS_ISTREAM_LONG_LONG
+// Implement input stream operator for IOStreamSLL.
+std::istream& IOStreamScan(std::istream& is, IOStreamSLL& value)
+{
+  return IOStreamScanTemplate(is, value, 'd');
+}
+
+// Implement input stream operator for IOStreamULL.
+std::istream& IOStreamScan(std::istream& is, IOStreamULL& value)
+{
+  return IOStreamScanTemplate(is, value, 'u');
+}
+#  endif
+
+#  if !KWSYS_IOS_HAS_OSTREAM_LONG_LONG
+// Implement output stream operator for IOStreamSLL.
+std::ostream& IOStreamPrint(std::ostream& os, IOStreamSLL value)
+{
+  return IOStreamPrintTemplate(os, value, 'd');
+}
+
+// Implement output stream operator for IOStreamULL.
+std::ostream& IOStreamPrint(std::ostream& os, IOStreamULL value)
+{
+  return IOStreamPrintTemplate(os, value, 'u');
+}
+#  endif
+
+} // namespace KWSYS_NAMESPACE
+
+#else
+
+namespace KWSYS_NAMESPACE {
+
+// Create one public symbol in this object file to avoid warnings from
+// archivers.
+void IOStreamSymbolToAvoidWarning();
+void IOStreamSymbolToAvoidWarning()
+{
+}
+
+} // namespace KWSYS_NAMESPACE
+
+#endif // KWSYS_IOS_NEED_OPERATORS_LL