Remove gmx::File (except for File::exists())

[alexxy/gromacs.git] / src / gromacs / utility / filestream.cpp

diff --git a/src/gromacs/utility/filestream.cpp b/src/gromacs/utility/filestream.cpp
index 08d975421fef26a33e760aa7b0a6ade3d719ae6d..5f245858a5662fd6a0bace6138f10771179ad668 100644 (file)
--- a/src/gromacs/utility/filestream.cpp
+++ b/src/gromacs/utility/filestream.cpp
@@ -43,9 +43,15 @@
 
 #include "filestream.h"
 
+#include "config.h"
+
 #include <cerrno>
 #include <cstdio>
 
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
 #include "gromacs/utility/exceptions.h"
 #include "gromacs/utility/gmxassert.h"
 #include "gromacs/utility/stringutil.h"
@@ -53,6 +59,37 @@
 namespace gmx
 {
 
+namespace
+{
+
+//! Helper function for implementing readLine() for input streams.
+bool readLineImpl(FILE *fp, std::string *line)
+{
+    line->clear();
+    const size_t bufsize = 256;
+    std::string  result;
+    char         buf[bufsize];
+    buf[0] = '\0';
+    while (std::fgets(buf, bufsize, fp) != NULL)
+    {
+        const size_t length = std::strlen(buf);
+        result.append(buf, length);
+        if (length < bufsize - 1 || buf[length - 1] == '\n')
+        {
+            break;
+        }
+    }
+    if (std::ferror(fp))
+    {
+        GMX_THROW_WITH_ERRNO(FileIOError("Error while reading file"),
+                             "fgets", errno);
+    }
+    *line = result;
+    return !result.empty() || !std::feof(fp);
+}
+
+}   // namespace
+
 namespace internal
 {
 
@@ -122,6 +159,83 @@ class FileStreamImpl
 
 using internal::FileStreamImpl;
 
+/********************************************************************
+ * StandardInputStream
+ */
+
+bool StandardInputStream::isInteractive() const
+{
+#ifdef HAVE_UNISTD_H
+    return isatty(fileno(stdin));
+#else
+    return true;
+#endif
+}
+
+bool StandardInputStream::readLine(std::string *line)
+{
+    return readLineImpl(stdin, line);
+}
+
+// static
+StandardInputStream &StandardInputStream::instance()
+{
+    static StandardInputStream stdinObject;
+    return stdinObject;
+}
+
+/********************************************************************
+ * TextInputFile
+ */
+
+// static
+FILE *TextInputFile::openRawHandle(const char *filename)
+{
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        GMX_THROW_WITH_ERRNO(
+                FileIOError(formatString("Could not open file '%s'", filename)),
+                "fopen", errno);
+    }
+    return fp;
+}
+
+// static
+FILE *TextInputFile::openRawHandle(const std::string &filename)
+{
+    return openRawHandle(filename.c_str());
+}
+
+TextInputFile::TextInputFile(const std::string &filename)
+    : impl_(new FileStreamImpl(filename.c_str(), "r"))
+{
+}
+
+TextInputFile::TextInputFile(FILE *fp)
+    : impl_(new FileStreamImpl(fp))
+{
+}
+
+TextInputFile::~TextInputFile()
+{
+}
+
+FILE *TextInputFile::handle()
+{
+    return impl_->handle();
+}
+
+bool TextInputFile::readLine(std::string *line)
+{
+    return readLineImpl(impl_->handle(), line);
+}
+
+void TextInputFile::close()
+{
+    impl_->close();
+}
+
 /********************************************************************
  * TextOutputFile
  */