From 74d3bdc68cb86f734c9de11a5d179960384b22b7 Mon Sep 17 00:00:00 2001
From: timoore <timoore>
Date: Thu, 7 Aug 2008 22:24:01 +0000
Subject: [PATCH] Return eof after a number of reptetitions of file input.

---
 simgear/io/sg_file.cxx | 10 ++++++----
 simgear/io/sg_file.hxx |  7 +++++--
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/simgear/io/sg_file.cxx b/simgear/io/sg_file.cxx
index 213a1790..bbfc3247 100644
--- a/simgear/io/sg_file.cxx
+++ b/simgear/io/sg_file.cxx
@@ -39,8 +39,8 @@
 using std::string;
 
 
-SGFile::SGFile(const string &file, bool repeat_)
-    : file_name(file), fp(-1), eof_flag(true), repeat(repeat_)
+SGFile::SGFile(const string &file, int repeat_)
+    : file_name(file), fp(-1), eof_flag(true), repeat(repeat_), iteration(0)
 {
     set_type( sgFileType );
 }
@@ -84,7 +84,8 @@ int SGFile::read( char *buf, int length ) {
     // read a chunk
     ssize_t result = ::read( fp, buf, length );
     if ( length > 0 && result == 0 ) {
-        if (repeat) {
+        if (repeat < 0 || iteration < repeat - 1) {
+            iteration++;
             // loop reading the file, unless it is empty
             off_t fileLen = ::lseek(fp, 0, SEEK_CUR);
             if (fileLen == 0) {
@@ -110,7 +111,8 @@ int SGFile::readline( char *buf, int length ) {
     // read a chunk
     ssize_t result = ::read( fp, buf, length );
     if ( length > 0 && result == 0 ) {
-        if (repeat && pos != 0) {
+        if ((repeat < 0 || iteration < repeat - 1) && pos != 0) {
+            iteration++;
             pos = ::lseek(fp, 0, SEEK_SET);
             result = ::read(fp, buf, length);
         } else {
diff --git a/simgear/io/sg_file.hxx b/simgear/io/sg_file.hxx
index a64dd6ee..1bf3800d 100644
--- a/simgear/io/sg_file.hxx
+++ b/simgear/io/sg_file.hxx
@@ -55,7 +55,10 @@ class SGFile : public SGIOChannel {
     string file_name;
     int fp;
     bool eof_flag;
-    bool repeat;
+    // Number of repetitions to play. -1 means loop infinitely.
+    const int repeat;
+    int iteration;              // number of current repetition,
+                                // starting at 0
 
 public:
 
@@ -67,7 +70,7 @@ public:
      * @param file name of file to open
      * @param repeat On eof restart at the beginning of the file
      */
-    SGFile( const string& file, bool repeat_ = false );
+    SGFile( const string& file, int repeat_ = 1 );
 
     /** Destructor */
     ~SGFile();
-- 
2.39.5