[lasem] render: don't overwrite input file if neither -f or -o option is present

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 16030a377624b86281d31410a4720eb67ff10958
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Aug 3 14:59:15 2015 +0200

    render: don't overwrite input file if neither -f or -o option is present

 src/lasemrender.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/src/lasemrender.c b/src/lasemrender.c
index 7c6e7fa..c73a579 100644
--- a/src/lasemrender.c
+++ b/src/lasemrender.c
@@ -104,21 +104,21 @@ int main(int argc, char **argv)
        if (!g_option_context_parse (context, &argc, &argv, &error))
        {
                g_option_context_free (context);
-               g_print (_("Option parsing failed: %s\n"), error->message);
+               printf ("%s %s\n", _("Option parsing failed:"), error->message);
                return EXIT_FAILURE;
        }
 
        g_option_context_free (context);
 
        if (option_zoom < 0.0) {
-               g_print (_("Invalid zoom value"));
+               printf ("%s\n", _("Invalid zoom value"));
                return EXIT_FAILURE;
        }
 
        lsm_debug_enable (option_debug_domains);
 
        if (option_input_filenames == NULL || g_strv_length (option_input_filenames) > 1) {
-               g_print (_("One input file name is required\n"));
+               printf ("%s\n", _("Missing input filename"));
                return EXIT_FAILURE;
        }
 
@@ -129,7 +129,7 @@ int main(int argc, char **argv)
                        if (g_ascii_strcasecmp (option_output_file_format, file_formats[format]) == 0)
                                break;
                if (FORMAT_UNKNOWN == format) {
-                       g_print (_("Unknown format: %s\n"), option_output_file_format);
+                       printf ("%s %s\n", _("Unknown format:"), option_output_file_format);
                        return EXIT_FAILURE;
                }
        } else
@@ -168,6 +168,11 @@ int main(int argc, char **argv)
                g_free (directory);
        }
 
+       if (format == FORMAT_UNKNOWN) {
+               printf ("%s\n", _("Don't know which format to use, please either give a format (-f) or an 
output filename (-o)"));
+               return EXIT_FAILURE;
+       }
+
        document = lsm_dom_document_new_from_path (input_filename,
                                                   NULL);
        if (document == NULL) {
@@ -191,7 +196,7 @@ int main(int argc, char **argv)
                        lsm_dom_document_save_to_memory (document, &buffer, &size, NULL);
 
                        if (buffer != NULL) {
-                               g_printf ("%*s\n", (int) size, (char *) buffer);
+                               printf ("%*s\n", (int) size, (char *) buffer);
                                g_free (buffer);
                        }
                }
@@ -254,7 +259,8 @@ int main(int argc, char **argv)
 
                lsm_debug_render ("width = %g pt, height = %g pt",  width_pt, height_pt);
        } else {
-               g_print (_("Can't load '%s'\n"), input_filename);
+               printf (_("Can't load '%s'"), input_filename);
+               printf ("\n");
 
                return EXIT_FAILURE;
        }