Changes between Version 7 and Version 8 of FileCompression

Timestamp:

Mar 4, 2008, 10:55:18 AM (17 years ago)

Author:

Kevin Reed

Comment:

--

FileCompression

@@ -4 +4 @@
 
 If you include the `<gzip_when_done>` tag in an [XmlFormat#Files output file description], the file will be gzip-compressed after it has been generated. 
+
+The gzip_when_done is only supported in client version 5.8 (version # needs to be confirmed) and more recently.  If you will receive files from clients that do not support the gzip_when_done flag then you should open the files with a function similar to this:
+
+int read_gzip_file_string(string file, string* result) {
+    FILE *infile;
+    char cmd[512];
+    char buf[4096];
+    result->erase();
+
+    //build the command
+    cmd[0]='\0';
+    strcat(cmd, "gzip -dcf ");
+    strcat(cmd, file.c_str());
+
+    infile = popen(cmd, "r");
+    if (infile == NULL) {
+        return ERR_FOPEN;
+    }
+
+    while( fgets(buf, 4096, infile) != NULL ) {
+        result->append(buf);
+    }
+    result->append("\0");
+    if (pclose(infile) != 0) {
+            fprintf(stderr, "%s: pclose failed\n", file.c_str());
+            return 1;
+    }
+    return 0;
+}
+
+This will automatically uncompress the file if it is compressed or it will open it without modification if it is not compressed.
+
 
 == Compression of input files == #compress-input