From 29b56ef4e4113bcd091b19d6926f18814162ca53 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Tue, 26 Oct 2021 21:01:41 -0700
Subject: Feat(libunicode): Added an explicit unicode library

Refactored code to pull out utf8 functions from base into a standalone
library. Also left the required function inside arg.c so that code that
calls ARG_BEGIN doesn't have to link to libunicode.
---
 sys/cmd/rc/exec.c   |  2 +-
 sys/cmd/rc/input.c  |  6 +++---
 sys/cmd/rc/lex.c    |  1 +
 sys/cmd/rc/prompt.c | 19 ++++++++++++++-----
 sys/cmd/rc/rc.h     |  4 ++--
 5 files changed, 21 insertions(+), 11 deletions(-)

(limited to 'sys/cmd/rc')

diff --git a/sys/cmd/rc/exec.c b/sys/cmd/rc/exec.c
index 1b311ec..5baaf1a 100644
--- a/sys/cmd/rc/exec.c
+++ b/sys/cmd/rc/exec.c
@@ -914,7 +914,7 @@ Xreadcmd(void)
     flush(shell.err);
     root = runner;
 
-    shell.prompt = "> ";
+    resetprompt();
 
     if(yyparse()){
         // resource cleanup?
diff --git a/sys/cmd/rc/input.c b/sys/cmd/rc/input.c
index a89dbda..56f1780 100644
--- a/sys/cmd/rc/input.c
+++ b/sys/cmd/rc/input.c
@@ -309,11 +309,11 @@ refreshsingleline(struct TerminalState *term)
     char esc[64];
     struct Buffer ab;
 
-    intptr plen = term->plen;
+    intptr plen  = term->plen;
     int     fd   = term->ofd;
     char   *buf  = term->buf;
-    intptr len  = term->len;
-    intptr pos  = term->pos;
+    intptr len   = term->len;
+    intptr pos   = term->pos;
 
     while((plen+pos) >= term->cols) {
         buf++;
diff --git a/sys/cmd/rc/lex.c b/sys/cmd/rc/lex.c
index 596021b..9a58f21 100644
--- a/sys/cmd/rc/lex.c
+++ b/sys/cmd/rc/lex.c
@@ -52,6 +52,7 @@ readc(void)
         peek = EOF;
         return c;
     }
+
     if(runner->flag.eof)
         return EOF;
 
diff --git a/sys/cmd/rc/prompt.c b/sys/cmd/rc/prompt.c
index d6846e6..6a32d59 100644
--- a/sys/cmd/rc/prompt.c
+++ b/sys/cmd/rc/prompt.c
@@ -1,21 +1,30 @@
 #include "rc.h"
 
+static char promptbuf[7] = {'>', ' ', 0, ' ' , ' ', ' ', 0};
+
+void
+resetprompt(void)
+{
+    promptbuf[2] = 0;
+}
 
 int
 prompt(ushort *flag)
 {
-    int fd, f = *flag;
+    int f = *flag;
+
     if(f){
-        if(!readline(shell.prompt)){
+        if(!readline(promptbuf)){
             runner->flag.eof = 1;
             return 0;
         }
-        fd = mapfd(0);
-        write(fd, "\n\r", 2);
-        shell.prompt = ">    "; // NOTE: can't use tab here: we have a hacky prompt length computation
+        write(mapfd(0), "\n\r", 2);
+
+        promptbuf[2] = ' ';
 
         runner->line++;
         *flag = 0;
     }
+
     return 1;
 }
diff --git a/sys/cmd/rc/rc.h b/sys/cmd/rc/rc.h
index 5a9aac5..eaf668a 100644
--- a/sys/cmd/rc/rc.h
+++ b/sys/cmd/rc/rc.h
@@ -152,7 +152,6 @@ struct Shell
     Io *err;
     int status;
     int interactive;
-    char *prompt;
     Thread *jobs;
 };
 
@@ -178,7 +177,8 @@ int  readline(char *);
 void enablevi(void);
 
 /* prompt.c */
-int prompt(ushort *);
+void resetprompt(void);
+int  prompt(ushort *);
 
 /* io.c */
 Io  *openfd(int fd);
-- 
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