M block.go → block.go

@@ -662,11 +662,20 @@
 	return i
 }
 
+// check if the specified position is preceeded by an odd number of backslashes
+func isBackslashEscaped(data []byte, i int) bool {
+	backslashes := 0
+	for i-backslashes-1 >= 0 && data[i-backslashes-1] == '\\' {
+		backslashes++
+	}
+	return backslashes&1 == 1
+}
+
 func (p *parser) tableHeader(out *bytes.Buffer, data []byte) (size int, columns []int) {
 	i := 0
 	colCount := 1
 	for i = 0; data[i] != '\n'; i++ {
-		if data[i] == '|' {
+		if data[i] == '|' && !isBackslashEscaped(data, i) {
 			colCount++
 		}
 	}
@@ -683,7 +692,7 @@ // column count ignores pipes at beginning or end of line
 	if data[0] == '|' {
 		colCount--
 	}
-	if i > 2 && data[i-1] == '|' {
+	if i > 2 && data[i-1] == '|' && !isBackslashEscaped(data, i-1) {
 		colCount--
 	}
 
@@ -695,7 +704,7 @@ if i >= len(data) {
 		return
 	}
 
-	if data[i] == '|' {
+	if data[i] == '|' && !isBackslashEscaped(data, i) {
 		i++
 	}
 	for data[i] == ' ' {
@@ -732,7 +741,7 @@ case dashes < 3:
 			// not a valid column
 			return
 
-		case data[i] == '|':
+		case data[i] == '|' && !isBackslashEscaped(data, i):
 			// marker found, now skip past trailing whitespace
 			col++
 			i++
@@ -745,7 +754,7 @@ if col >= colCount && data[i] != '\n' {
 				return
 			}
 
-		case data[i] != '|' && col+1 < colCount:
+		case (data[i] != '|' || isBackslashEscaped(data, i)) && col+1 < colCount:
 			// something else found where marker was required
 			return
 
@@ -771,7 +780,7 @@ func (p *parser) tableRow(out *bytes.Buffer, data []byte, columns []int) {
 	i, col := 0, 0
 	var rowWork bytes.Buffer
 
-	if data[i] == '|' {
+	if data[i] == '|' && !isBackslashEscaped(data, i) {
 		i++
 	}
 
@@ -782,7 +791,7 @@ }
 
 		cellStart := i
 
-		for data[i] != '|' && data[i] != '\n' {
+		for (data[i] != '|' || isBackslashEscaped(data, i)) && data[i] != '\n' {
 			i++
 		}
 

M block_test.go → block_test.go

@@ -686,6 +686,9 @@
 		"a| b|c | d | e\n---|---|---|---|---\nf| g|h | i |j\n",
 		"<table>\n<thead>\n<tr>\n<td>a</td>\n<td>b</td>\n<td>c</td>\n<td>d</td>\n<td>e</td>\n</tr>\n</thead>\n\n" +
 			"<tbody>\n<tr>\n<td>f</td>\n<td>g</td>\n<td>h</td>\n<td>i</td>\n<td>j</td>\n</tr>\n</tbody>\n</table>\n",
+
+		"a|b\\|c|d\n---|---|---\nf|g\\|h|i\n",
+		"<table>\n<thead>\n<tr>\n<td>a</td>\n<td>b|c</td>\n<td>d</td>\n</tr>\n</thead>\n\n<tbody>\n<tr>\n<td>f</td>\n<td>g|h</td>\n<td>i</td>\n</tr>\n</tbody>\n</table>\n",
 	}
 	doTestsBlock(t, tests, EXTENSION_TABLES)
 }