in some circumstances, temporary files are not created as they are supposed to (windows tries to create it in a place protected by Admin.) We need to be able to try to create them in the location pointed to by the TEMP env var. Note that this is not threadsafe, but it's unlikely to cause a problem at the moment.

git-svn-id: https://flam3.googlecode.com/svn/trunk@154 77852712-ef1d-11de-8684-7d64432d61a3

1 files changed, 28 insertions, 0 deletions

diff --git a/src/flam3.c b/src/flam3.c
index c56b233..9df618c 100644
--- a/src/flam3.c
+++ b/src/flam3.c
@@ -28,6 +28,7 @@
 #include "parser.h"
 #include "filters.h"
 #include "palettes.h"
+#include "unistd.h"
 #include <limits.h>
 #include <locale.h>
 #include <math.h>
@@ -1617,7 +1618,31 @@ char *flam3_print_to_string(flam3_genome *cp) {
    long stringbytes;
    char *genome_string;
    
+   int using_tmpdir = 0;
+   char *tmp_path;
+   char tmpnam[256];
+   
    tmpflame = tmpfile();
+   if (NULL==tmpflame) {
+#ifdef _WIN32       
+       // This might be a permissions problem, so let's try to open a
+       // tempfile in the env var TEMP's area instead
+       tmp_path = getenv("TEMP");
+
+       if (tmp_path != NULL) {
+          strcpy(tmpnam, tmp_path);
+          strcat(tmpnam, "\\fr0st.tmp");
+          tmpflame = fopen(tmpnam, "w+");
+          if (tmpflame != NULL) {
+             using_tmpdir = 1;
+          }
+       }
+#endif
+       if (using_tmpdir == 0) {
+          perror("FLAM3: opening temporary file");
+          return (NULL);
+       }
+   }
    flam3_print(tmpflame,cp,NULL,flam3_dont_print_edits);
    stringbytes = ftell(tmpflame);
    fseek(tmpflame,0L, SEEK_SET);
@@ -1626,6 +1651,9 @@ char *flam3_print_to_string(flam3_genome *cp) {
        perror("FLAM3: reading string from temp file");
    }
    fclose(tmpflame);
+
+   if (using_tmpdir)
+      unlink(tmpnam);
    
    return(genome_string);
 }