[src/trunk]: src/lib/libedit abstract read code to a single function (Ingo Sc...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/648aec0fd3d8
branches:  trunk
changeset: 345411:648aec0fd3d8
user:      christos <christos%NetBSD.org@localhost>
date:      Wed May 25 13:01:11 2016 +0000

description:
abstract read code to a single function (Ingo Schwarze)

diffstat:

 lib/libedit/read.c |  98 +++++++++++++++++++----------------------------------
 1 files changed, 35 insertions(+), 63 deletions(-)

diffs (162 lines):

diff -r 5fcb440bc5be -r 648aec0fd3d8 lib/libedit/read.c
--- a/lib/libedit/read.c        Wed May 25 12:43:08 2016 +0000
+++ b/lib/libedit/read.c        Wed May 25 13:01:11 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: read.c,v 1.100 2016/05/24 19:31:27 christos Exp $      */
+/*     $NetBSD: read.c,v 1.101 2016/05/25 13:01:11 christos Exp $      */
 
 /*-
  * Copyright (c) 1992, 1993
@@ -37,13 +37,12 @@
 #if 0
 static char sccsid[] = "@(#)read.c     8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: read.c,v 1.100 2016/05/24 19:31:27 christos Exp $");
+__RCSID("$NetBSD: read.c,v 1.101 2016/05/25 13:01:11 christos Exp $");
 #endif
 #endif /* not lint && not SCCSID */
 
 /*
- * read.c: Clean this junk up! This is horrible code.
- *        Terminal read functions
+ * read.c: Terminal read functions
  */
 #include <ctype.h>
 #include <errno.h>
@@ -76,6 +75,7 @@
 static int     read_getcmd(EditLine *, el_action_t *, wchar_t *);
 static void    read_clearmacros(struct macros *);
 static void    read_pop(struct macros *);
+static const wchar_t *noedit_wgets(EditLine *, int *);
 
 /* read_init():
  *     Initialize the read stuff
@@ -453,15 +453,37 @@
                sig_clr(el);
 }
 
+static const wchar_t *
+noedit_wgets(EditLine *el, int *nread)
+{
+       el_line_t       *lp = &el->el_line;
+       int              num;
+
+       while ((num = (*el->el_read->read_char)(el, lp->lastchar)) == 1) {
+               if (lp->lastchar + 1 >= lp->limit &&
+                   !ch_enlargebufs(el, (size_t)2))
+                       break;
+               lp->lastchar++;
+               if (el->el_flags & UNBUFFERED ||
+                   lp->lastchar[-1] == '\r' ||
+                   lp->lastchar[-1] == '\n')
+                       break;
+       }
+       if (num == -1 && errno == EINTR)
+               lp->lastchar = lp->buffer;
+       lp->cursor = lp->lastchar;
+       *lp->lastchar = '\0';
+       *nread = (int)(lp->lastchar - lp->buffer);
+       return *nread ? lp->buffer : NULL;
+}
+
 const wchar_t *
 el_wgets(EditLine *el, int *nread)
 {
        int retval;
        el_action_t cmdnum = 0;
        int num;                /* how many chars we have read at NL */
-       wchar_t wc;
-       wchar_t ch, *cp;
-       int crlf = 0;
+       wchar_t ch;
        int nrb;
 
        if (nread == NULL)
@@ -470,30 +492,10 @@
        el->el_read->read_errno = 0;
 
        if (el->el_flags & NO_TTY) {
-               size_t idx;
-
-               cp = el->el_line.buffer;
-               while ((num = (*el->el_read->read_char)(el, &wc)) == 1) {
-                       *cp = wc;
-                       /* make sure there is space for next character */
-                       if (cp + 1 >= el->el_line.limit) {
-                               idx = (size_t)(cp - el->el_line.buffer);
-                               if (!ch_enlargebufs(el, (size_t)2))
-                                       break;
-                               cp = &el->el_line.buffer[idx];
-                       }
-                       cp++;
-                       if (el->el_flags & UNBUFFERED)
-                               break;
-                       if (cp[-1] == '\r' || cp[-1] == '\n')
-                               break;
-               }
-               if (num == -1 && errno == EINTR)
-                       cp = el->el_line.buffer;
-               goto noedit;
+               el->el_line.lastchar = el->el_line.buffer;
+               return noedit_wgets(el, nread);
        }
 
-
 #ifdef FIONREAD
        if (el->el_tty.t_mode == EX_IO && el->el_read->macros.level < 0) {
                int chrs = 0;
@@ -513,34 +515,10 @@
                read_prepare(el);
 
        if (el->el_flags & EDIT_DISABLED) {
-               size_t idx;
-
                if ((el->el_flags & UNBUFFERED) == 0)
-                       cp = el->el_line.buffer;
-               else
-                       cp = el->el_line.lastchar;
-
+                       el->el_line.lastchar = el->el_line.buffer;
                terminal__flush(el);
-
-               while ((num = (*el->el_read->read_char)(el, &wc)) == 1) {
-                       *cp = wc;
-                       /* make sure there is space next character */
-                       if (cp + 1 >= el->el_line.limit) {
-                               idx = (size_t)(cp - el->el_line.buffer);
-                               if (!ch_enlargebufs(el, (size_t)2))
-                                       break;
-                               cp = &el->el_line.buffer[idx];
-                       }
-                       cp++;
-                       crlf = cp[-1] == '\r' || cp[-1] == '\n';
-                       if (el->el_flags & UNBUFFERED)
-                               break;
-                       if (crlf)
-                               break;
-               }
-               if (num == -1 && errno == EINTR)
-                       cp = el->el_line.buffer;
-               goto noedit;
+               return noedit_wgets(el, nread);
        }
 
        for (num = -1; num == -1;) {  /* while still editing this line */
@@ -635,15 +613,9 @@
        if ((el->el_flags & UNBUFFERED) == 0) {
                read_finish(el);
                *nread = num != -1 ? num : 0;
-       } else {
+       } else
                *nread = (int)(el->el_line.lastchar - el->el_line.buffer);
-       }
-       goto done;
-noedit:
-       el->el_line.cursor = el->el_line.lastchar = cp;
-       *cp = '\0';
-       *nread = (int)(el->el_line.cursor - el->el_line.buffer);
-done:
+
        if (*nread == 0) {
                if (num == -1) {
                        *nread = -1;