sh: Code size optimizations to "stack string" memory allocation:

* Prefer one CHECKSTRSPACE with multiple USTPUTC to multiple STPUTC.
* Add STPUTS macro (based on function) and use it instead of loops that add
  nul-terminated strings to the stack string.

No functional change is intended, but code size is about 1K less on i386.

1 files changed, 17 insertions, 0 deletions

diff --git a/bin/sh/memalloc.c b/bin/sh/memalloc.c
index 9158719..d00b4d9 100644
--- a/bin/sh/memalloc.c
+++ b/bin/sh/memalloc.c
@@ -340,3 +340,20 @@ ungrabstackstr(char *s, char *p)
 	stacknxt = s;
 	sstrnleft = stacknleft - (p - s);
 }
+
+
+char *
+stputbin(const char *data, int len, char *p)
+{
+	int i;
+
+	for (i = 0; i < len; i++)
+		STPUTC(data[i], p);
+	return (p);
+}
+
+char *
+stputs(const char *data, char *p)
+{
+	return (stputbin(data, strlen(data), p));
+}