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, 1 insertions, 2 deletions

diff --git a/bin/sh/eval.c b/bin/sh/eval.c
index c306e73..5bae2f2 100644
--- a/bin/sh/eval.c
+++ b/bin/sh/eval.c
@@ -135,8 +135,7 @@ evalcmd(int argc, char **argv)
                         STARTSTACKSTR(concat);
                         ap = argv + 2;
                         for (;;) {
-                                while (*p)
-                                        STPUTC(*p++, concat);
+                                STPUTS(p, concat);
                                 if ((p = *ap++) == NULL)
                                         break;
                                 STPUTC(' ', concat);