From 32639324a5ed0b1678d1066680ed6d2e469ae271 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michael=20G=C3=B6hler?= <somebody.here@gmx.de>
Date: Tue, 26 Aug 2014 00:09:09 +0200
Subject: [PATCH] calculate length of lines including backslashes correctly

---
 include/parser.h |  3 +++
 parser.c         | 59 +++++++++++++++++++++++++++++++++++++-----------
 sample.md        |  7 +++++-
 3 files changed, 55 insertions(+), 14 deletions(-)

diff --git a/include/parser.h b/include/parser.h
index 89e1a5d..f7e6847 100644
--- a/include/parser.h
+++ b/include/parser.h
@@ -3,6 +3,9 @@
 
 #include "markdown.h"
 
+#define EXPAND_TABS 4
+#define CODE_INDENT 4
+
 deck_t *markdown_load(FILE *input);
 int markdown_analyse(cstring_t *text);
 void markdown_debug(deck_t *deck, int debug);
diff --git a/parser.c b/parser.c
index 4121964..9931b02 100644
--- a/parser.c
+++ b/parser.c
@@ -80,11 +80,35 @@ deck_t *markdown_load(FILE *input) {
         } else if(c == '\t') {
 
             // expand tab to spaces
-            for (i = 0;  i <= 4;  i++) {
+            for (i = 0;  i <= EXPAND_TABS;  i++) {
                 (text->expand)(text, ' ');
                 l++;
             }
 
+        } else if(c == '\\') {
+
+            // add char to line
+            (text->expand)(text, c);
+            l++;
+
+            // if !IS_CODE add next char to line
+            // and do not increase line count
+            if(next_nonblank(text, 0) < CODE_INDENT) {
+
+                c = fgetc(input);
+                (text->expand)(text, c);
+
+                if(is_utf8(c)) {
+
+                    // if utf-8 char > 1 byte add remaing to line
+                    for(i = 0; i < length_utf8(c) - 1; i++) {
+                        c = fgetc(input);
+                        (text->expand)(text, c);
+                    }
+                }
+
+            }
+
         } else if(isprint(c) || isspace(c)) {
 
             // add char to line
@@ -101,6 +125,7 @@ deck_t *markdown_load(FILE *input) {
                 c = fgetc(input);
                 (text->expand)(text, c);
             }
+
             l++;
         }
     }
@@ -187,15 +212,28 @@ int markdown_analyse(cstring_t *text) {
     // strip trailing spaces
     for(eol = text->size; eol > offset && isspace(text->text[eol - 1]); eol--);
 
+    // IS_CODE
+    if(offset >= CODE_INDENT) {
+        SET_BIT(bits, IS_CODE);
+    }
+
     for(i = offset; i < eol; i++) {
 
-        switch(text->text[i]) {
-            case '=': equals++;  break;
-            case '#': hashes++;  break;
-            case '*': stars++;   break;
-            case '-': minus++;   break;
-            case ' ': spaces++;  break;
-            default:  other++;   break;
+        if(text->text[i] == ' ') {
+            spaces++;
+
+        } else if(CHECK_BIT(bits, IS_CODE)) {
+            other++;
+
+        } else {
+            switch(text->text[i]) {
+                case '=': equals++;  break;
+                case '#': hashes++;  break;
+                case '*': stars++;   break;
+                case '-': minus++;   break;
+                case '\\': other++; i++; break;
+                default:  other++;   break;
+            }
         }
     }
 
@@ -229,11 +267,6 @@ int markdown_analyse(cstring_t *text) {
         SET_BIT(bits, IS_QUOTE);
     }
 
-    // IS_CODE
-    if(offset >= 4) {
-        SET_BIT(bits, IS_CODE);
-    }
-
     // IS_HR
     if((minus >= 3 && equals + hashes + stars + other == 0) ||
        (stars >= 3 && equals + hashes + minus + other == 0)) {
diff --git a/sample.md b/sample.md
index e99bc8c..e35b9e8 100644
--- a/sample.md
+++ b/sample.md
@@ -7,7 +7,12 @@ Title
 
 This is the first page.
 
---------------------------------------------------------------------------------
+------------------------------------
+
+These are 3 stars: \*\*\*
+And two backslashes: \\\\
+
+---
 
 # Page 2
 
-- 
2.20.1