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, 4 insertions, 0 deletions

diff --git a/bin/sh/memalloc.h b/bin/sh/memalloc.h
index 563927a..88848dd 100644
--- a/bin/sh/memalloc.h
+++ b/bin/sh/memalloc.h
@@ -61,6 +61,8 @@ void grabstackblock(int);
 char *growstackstr(void);
 char *makestrspace(void);
 void ungrabstackstr(char *, char *);
+char *stputbin(const char *data, int len, char *p);
+char *stputs(const char *data, char *p);
 
 
 
@@ -82,3 +84,5 @@ void ungrabstackstr(char *, char *);
 #define STTOPC(p)	p[-1]
 #define STADJUST(amount, p)	(p += (amount), sstrnleft -= (amount))
 #define grabstackstr(p)	stalloc(stackblocksize() - sstrnleft)
+#define STPUTBIN(s, len, p)	p = stputbin((s), (len), p)
+#define STPUTS(s, p)	p = stputs((s), p)