tadd function to print a single line, ignoring \r and \n - stagit - [fork] customized build of stagit, the static git page generator

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---

commit d87119b82df29649c7dae1569af4777cfbaea236

parent 3ac65c5b4288740388815867ad0d2d2997ec3c7a

Author: Hiltjo Posthuma 

Date:   Thu, 25 Mar 2021 18:13:13 +0100

add function to print a single line, ignoring \r and \n

This can happen when there is no newline at end of file in the diff which is
served by libgit2 as:

"\n\ No newline at end of file\n".

Diffstat:
  M stagit.c                            |      23 ++++++++++++++++++++++-

1 file changed, 22 insertions(+), 1 deletion(-)
---

diff --git a/stagit.c b/stagit.c

t@@ -380,6 +380,26 @@ xmlencode(FILE *fp, const char *s, size_t len)
         }
 }
 
+/* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
+void
+xmlencodeline(FILE *fp, const char *s, size_t len)
+{
+        size_t i;
+
+        for (i = 0; *s && i < len; s++, i++) {
+                switch(*s) {
+                case '<':  fputs("<",   fp); break;
+                case '>':  fputs(">",   fp); break;
+                case '\'': fputs("'",  fp); break;
+                case '&':  fputs("&",  fp); break;
+                case '"':  fputs(""", fp); break;
+                case '\r': break; /* ignore CR */
+                case '\n': break; /* ignore LF */
+                default:   putc(*s, fp);
+                }
+        }
+}
+
 int
 mkdirp(const char *path)
 {
t@@ -691,7 +711,8 @@ printshowfile(FILE *fp, struct commitinfo *ci)
                                                 i, j, k, i, j, k);
                                 else
                                         putc(' ', fp);
-                                xmlencode(fp, line->content, line->content_len);
+                                xmlencodeline(fp, line->content, line->content_len);
+                                putc('\n', fp);
                                 if (line->old_lineno == -1 || line->new_lineno == -1)
                                         fputs("", fp);
                         }