GopherProxy

	do some extra checks to be safe - sob - simple output bar
	git clone git://git.codemadness.org/sob
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	---
	commit 44fdd353a9864ddb98cf5ef72f57936c42805038
	parent f9bbf270b93c85592b54d7d2c6b4cb769feecc64
	Author: Hiltjo Posthuma <[email protected]>
	Date: Sat, 4 Oct 2014 12:36:16 +0000

	do some extra checks to be safe

	Diffstat:
	M sob.c \| 21 +++++++++++++++------

	1 file changed, 15 insertions(+), 6 deletions(-)
	---
	diff --git a/sob.c b/sob.c
	@@ -151,7 +151,7 @@ utfuntilchar(size_t b, size_t u, int (*f)(int), int dir)
	}

	} else {
	- while(*u > 0) {
	+ while(u > 0 && b > 0) {
	if(f(line.line[*b - 1]))
	break;
	if((n = utfprevn(line.line, *b, 1)) == 0)
	@@ -289,10 +289,14 @@ line_cursor_begin(void)
	static void
	line_cursor_prev(void)
	{
	+ size_t n;
	+
	if(line.utfpos <= 0)
	return;
	+ if((n = utfprevn(line.line, line.bytepos, 1)) == 0)
	+ return;

	- line.bytepos -= utfprevn(line.line, line.bytepos, 1);
	+ line.bytepos -= n;
	line.utfpos--;
	line_cursor_move(line.utfpos);
	}
	@@ -300,10 +304,14 @@ line_cursor_prev(void)
	static void
	line_cursor_next(void)
	{
	+ size_t n;
	+
	if(line.utfpos >= line.utflen)
	return;

	- line.bytepos += utfnextn(line.line, line.bytepos, 1);
	+ if((n = utfnextn(line.line, line.bytepos, 1)) == 0)
	+ return;
	+ line.bytepos += n;
	line.utfpos++;
	line_cursor_move(line.utfpos);
	}
	@@ -332,7 +340,8 @@ line_delcharnext(void)
	if(line.utfpos == line.utflen \|\| line.utflen <= 0)
	return;

	- siz = utfnextn(line.line, line.bytepos, 1);
	+ if((siz = utfnextn(line.line, line.bytepos, 1)) == 0)
	+ return;
	memmove(&line.line[line.bytepos], &line.line[line.bytepos + siz],
	line.bytesiz - line.bytepos - siz);

	@@ -348,8 +357,8 @@ line_delcharprev(void)

	if(line.utfpos <= 0 \|\| line.utflen <= 0)
	return;
	-
	- siz = utfprevn(line.line, line.bytepos, 1);
	+ if((siz = utfprevn(line.line, line.bytepos, 1)) == 0)
	+ return;

	memmove(&line.line[line.bytepos - siz], &line.line[line.bytepos],
	line.bytesiz - line.bytepos);