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	Warn on invalid encoding. - sam - An updated version of the sam text editor.
	git clone git://vernunftzentrum.de/sam.git
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	---
	commit 520490c05a3d2049cd9df74efdacffd459fe66a5
	parent 5482032dce9b0f38b192198665de4c9beb14b52e
	Author: Rob King <[email protected]>
	Date: Mon, 3 Oct 2016 22:15:35 -0500

	Warn on invalid encoding.

	Diffstat:
	sam/error.c \| 1 +
	sam/errors.h \| 3 ++-
	sam/io.c \| 5 +++++

	3 files changed, 8 insertions(+), 1 deletion(-)
	---
	diff --git a/sam/error.c b/sam/error.c
	@@ -62,6 +62,7 @@ static char *wmsg[]={
	"can't run pwd",
	"last char not newline",
	"exit status not 0",
	+ "file is not text"
	};

	void
	diff --git a/sam/errors.h b/sam/errors.h
	@@ -59,5 +59,6 @@ typedef enum Warn{
	Wnulls,
	Wpwd,
	Wnotnewline,
	- Wbadstatus
	+ Wbadstatus,
	+ Wnottext
	}Warn;
	diff --git a/sam/io.c b/sam/io.c
	@@ -88,6 +88,11 @@ readio(File f, int nulls, int setdate)
	n = read(io, buf, BLOCKSIZE);
	while (n > 0){
	size_t w = mbsrtowcs(wbuf, &bp, BLOCKSIZE, &ps);
	+ if ((ssize_t)w < 0){
	+ *nulls = true;
	+ warn(Wnottext);
	+ return nt;
	+ }
	Finsert(f, tmprstr(wbuf, w), p);

	memset(buf, 0, sizeof(buf));