This is technically undefined behavior and may result in bad
codegen in other cases as well. @q66

https://github.com/cmus/cmus/pull/941

From 55cbb02c414fb5c41373e022974fc417e493a5ab Mon Sep 17 00:00:00 2001
From: Chris Grahn <grahn@posteo.net>
Date: Sun, 17 Nov 2019 23:42:16 -0600
Subject: [PATCH] Fix bug on ppc64 caused by narrowing cast

diff --git a/format_print.c b/format_print.c
index 0fee984..c7c0ef7 100644
--- format_print.c
+++ format_print.c
@@ -216,7 +216,8 @@ static void print_str(const char *src)
 
 		}
 	} else {
-		int s = 0, d = 0;
+		int s = 0;
+		size_t d = 0;
 		uchar u;
 
 		while (1) {
@@ -471,7 +472,7 @@ static void format_parse(int str_width, const char *format, const struct format_
 		u = u_get_char(format, &s);
 		if (u != '%') {
 			gbuf_grow(str, 4);
-			u_set_char(str->buffer, (int *)&str->len, u);
+			u_set_char(str->buffer, &str->len, u);
 			(*len) += u_char_width(u);
 			continue;
 		}
@@ -594,7 +595,7 @@ static void format_write(char *buf, int str_width)
 		strcpy(buf + pos + ws_len, r_str.buffer);
 	} else {
 		int l_space = str_width - str_len.rlen;
-		int pos = 0;
+		size_t pos = 0;
 		int idx = 0;
 
 		if (l_space > 0)
diff --git a/id3.c b/id3.c
index d505ba9..d5947b9 100644
--- id3.c
+++ id3.c
@@ -287,10 +287,10 @@ static int utf16_is_special(uchar uch)
 	return utf16_is_hsurrogate(uch) || utf16_is_lsurrogate(uch) || utf16_is_bom(uch);
 }
 
-static char *utf16_to_utf8(const unsigned char *buf, int buf_size)
+static char *utf16_to_utf8(const unsigned char *buf, size_t buf_size)
 {
 	char *out;
-	int i, idx;
+	size_t i, idx;
 	int little_endian = 0;
 
 	if (buf_size < 2)
diff --git a/uchar.c b/uchar.c
index 7b8691a..36509d7 100644
--- uchar.c
+++ uchar.c
@@ -428,7 +428,7 @@ void u_set_char_raw(char *str, int *idx, uchar uch)
  * Printing functions, these lose information
  */
 
-void u_set_char(char *str, int *idx, uchar uch)
+void u_set_char(char *str, size_t *idx, uchar uch)
 {
 	int i = *idx;
 
@@ -476,10 +476,11 @@ invalid:
 	}
 }
 
-int u_copy_chars(char *dst, const char *src, int *width)
+size_t u_copy_chars(char *dst, const char *src, int *width)
 {
 	int w = *width;
-	int si = 0, di = 0;
+	int si = 0;
+	size_t di = 0;
 	int cw;
 	uchar u;
 
diff --git a/uchar.h b/uchar.h
index 237cd55..8e03162 100644
--- uchar.h
+++ uchar.h
@@ -137,7 +137,7 @@ uchar u_get_char(const char *str, int *idx);
  * @uch  unicode character
  */
 void u_set_char_raw(char *str, int *idx, uchar uch);
-void u_set_char(char *str, int *idx, uchar uch);
+void u_set_char(char *str, size_t *idx, uchar uch);
 
 /*
  * @dst    destination buffer
@@ -150,7 +150,7 @@ void u_set_char(char *str, int *idx, uchar uch);
  *
  * Returns number of _bytes_ copied.
  */
-int u_copy_chars(char *dst, const char *src, int *width);
+size_t u_copy_chars(char *dst, const char *src, int *width);
 
 /*
  * @dst    destination buffer
diff --git a/ui_curses.c b/ui_curses.c
index 564b205..9621d94 100644
--- ui_curses.c
+++ ui_curses.c
@@ -467,7 +467,8 @@ static void dump_print_buffer(int row, int col)
  */
 static int format_str(char *buf, const char *str, int width)
 {
-	int s = 0, d = 0, ellipsis_pos = 0, cut_double_width = 0;
+	int s = 0, ellipsis_pos = 0, cut_double_width = 0;
+	size_t d = 0;
 
 	while (1) {
 		uchar u;
@@ -1237,7 +1238,8 @@ static void dump_buffer(const char *buffer)
 static void do_update_commandline(void)
 {
 	char *str;
-	int w, idx;
+	int w;
+	size_t idx;
 	char ch;
 
 	move(LINES - 1, 0);