Add fz_write_buffer_rune to append a utf-8 character to a buffer.

2 files changed, 13 insertions, 0 deletions

diff --git a/fitz/fitz-internal.h b/fitz/fitz-internal.h
index 76a3e774..043449db 100644
--- a/fitz/fitz-internal.h
+++ b/fitz/fitz-internal.h
@@ -617,6 +617,8 @@ void fz_write_buffer(fz_context *ctx, fz_buffer *buf, unsigned char *data, int l
 
 void fz_write_buffer_byte(fz_context *ctx, fz_buffer *buf, int val);
 
+void fz_write_buffer_rune(fz_context *ctx, fz_buffer *buf, int val);
+
 void fz_write_buffer_bits(fz_context *ctx, fz_buffer *buf, int val, int bits);
 
 void fz_write_buffer_pad(fz_context *ctx, fz_buffer *buf);
diff --git a/fitz/stm_buffer.c b/fitz/stm_buffer.c
index 8445ebc9..42a40584 100644
--- a/fitz/stm_buffer.c
+++ b/fitz/stm_buffer.c
@@ -124,6 +124,17 @@ void fz_write_buffer_byte(fz_context *ctx, fz_buffer *buf, int val)
 	buf->unused_bits = 0;
 }
 
+void fz_write_buffer_rune(fz_context *ctx, fz_buffer *buf, int c)
+{
+	char data[10];
+	int len = fz_runetochar(data, c);
+	if (buf->len + len > buf->cap)
+		fz_ensure_buffer(ctx, buf, buf->len + len);
+	memcpy(buf->data + buf->len, data, len);
+	buf->len += len;
+	buf->unused_bits = 0;
+}
+
 void fz_write_buffer_bits(fz_context *ctx, fz_buffer *buf, int val, int bits)
 {
 	int shift;