From 2744208ab3eab1741157e01484d08095bd8ef528 Mon Sep 17 00:00:00 2001
From: Bart Schaefer <schaefer@zsh.org>
Date: Sat, 3 Feb 2024 20:10:52 -0800
Subject: unposted: elaboration on Roman's "slurp" implementation from
 zsh-users

---
 Functions/Misc/zslurp | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Functions/Misc/zslurp

(limited to 'Functions')

diff --git a/Functions/Misc/zslurp b/Functions/Misc/zslurp
new file mode 100644
index 000000000..84df0c948
--- /dev/null
+++ b/Functions/Misc/zslurp
@@ -0,0 +1,31 @@
+#!/bin/zsh -f
+
+# Read stdin verbatim and as efficiently as possible into $REPLY,
+# stopping without any change to $REPLY in the event of any error.
+# Benchmarked by Roman Perepelitsa in zsh-users/29472
+
+# Although this function faithfully records the input stream, later
+# references to $REPLY with the multibyte option back in effect will
+# (re-)interpret the content as multibyte characters.  This may not be
+# what is desired.
+
+emulate -L zsh -o no_multibyte
+
+### Alternate formulation, faster on bigger files
+# # /dev/fd/0 is treated specially by -f so also check /dev/fd
+# if [[ -d /dev/fd && -f /dev/fd/0 ]] && zmodload zsh/mapfile
+# then
+#     local +h -Ar mapfile
+#     typeset -g REPLY="${mapfile[/dev/fd/0]}" && return
+# fi
+# # else fall through to read from pipe/socket
+
+zmodload zsh/system || return
+local -a content
+local -i i=0
+while true; do
+    sysread 'content[++i]' && continue
+    (( $? == 5 )) || return
+    break
+done
+typeset -g REPLY=${(j::)content}
-- 
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