Add an arg for the output filename to cleanpdf.c

prog/cleanpdf.c

@@ -36,7 +36,7 @@
  *    It will also take as input clean, orthographically-generated pdfs,
  *    and concatenate them into a single pdf file of images.
  *
- *     Syntax:  cleanpdf basedir threshold resolution [rotation]
+ *     Syntax:  cleanpdf basedir threshold resolution outfile [rotation]
  *
  *    The basedir is a directory where the input pdf files are located.
  *    The program will operate on every file in this directory with
@@ -50,6 +50,8 @@
  *    The resolution should be the scanned resolution.  This is typically
  *    300 ppi, which for an 8.5 x 11 page would be 2550 x 3300 pixels.
  *
+ *    The pdf output is written to outfile; suggest it has a '.pdf' extension.
+ *
  *    The optional rotation is an integer:
  *       0      no rotation
  *       1      90 degrees cw
@@ -58,6 +60,14 @@
  *
  *    Whenever possible, the images have been deskewed.
  *
+ *    The file-handling functions in leptonica do not support filenames
+ *    that have spaces.  To use cleanpdf in linux with such filenames,
+ *    substitute an ascii character for the spaces; e.g., '^'.
+ *       char *newstr = stringReplaceEachSubstr(str, " ", "^", NULL);
+ *    Then run cleanpdf on the file(s).  Note that you can have an
+ *    output filename with spaces by using single quotes; e.g.,
+ *       cleanpdf dir thresh res 'filename with spaces'
+ *
  *    N.B.  This requires pdfimages.  For non-unix systems, this requires
  *    installation of the cygwin Poppler package:
  *       https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86/poppler/
@@ -85,21 +95,22 @@ l_int32 main(int    argc,
              char **argv)
 {
 char         buf[256];
-char        *basedir, *fname, *tail, *basename, *imagedir;
+char        *basedir, *fname, *tail, *basename, *imagedir, *outfile;
 l_int32      thresh, res, rotation, i, n, ret;
 PIX         *pixs, *pix1, *pix2, *pix3, *pix4, *pix5;
 SARRAY      *sa;
 static char  mainName[] = "cleanpdf";
 
-    if (argc != 4 && argc != 5)
+    if (argc != 5 && argc != 6)
         return ERROR_INT(
-            "Syntax: cleanpdf basedir threshold resolution [rotation]",
+            "Syntax: cleanpdf basedir threshold resolution outfile [rotation]",
             mainName, 1);
     basedir = argv[1];
     thresh = atoi(argv[2]);
     res = atoi(argv[3]);
-    if (argc == 5)
-        rotation = atoi(argv[4]);
+    outfile = argv[4];
+    if (argc == 6)
+        rotation = atoi(argv[5]);
     else
         rotation = 0;
     if (rotation < 0 || rotation > 3) {
@@ -132,7 +143,7 @@ static char  mainName[] = "cleanpdf";
                  fname, imagedir, basename);
         lept_free(tail);
         lept_free(basename);
-        lept_stderr("%s\n", buf);
+        fprintf(stderr, "%s\n", buf);
         ret = system(buf);   /* pdfimages -j */
     }
     sarrayDestroy(&sa);
@@ -158,7 +169,7 @@ static char  mainName[] = "cleanpdf";
         splitPathAtDirectory(fname, NULL, &tail);
         splitPathAtExtension(tail, &basename, NULL);
         snprintf(buf, sizeof(buf), "%s/%s.tif", imagedir, basename);
-        lept_stderr("%s\n", buf);
+        fprintf(stderr, "%s\n", buf);
         pixWrite(buf, pix5, IFF_TIFF_G4);
         pixDestroy(&pixs);
         pixDestroy(&pix1);
@@ -174,10 +185,11 @@ static char  mainName[] = "cleanpdf";
 
 #if 1
         /* Generate the pdf */
-    lept_stderr("Write output to /tmp/output.pdf\n");
-    convertFilesToPdf(imagedir, "tif", res, 1.0, L_G4_ENCODE, 0, NULL,
-                      "/tmp/output.pdf");
+    fprintf(stderr, "Write output to %s\n", outfile);
+    convertFilesToPdf(imagedir, "tif", res, 1.0, L_G4_ENCODE, 0, NULL, outfile);
 #endif
 
     return 0;
 }
+
+