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Faster printf in bash SI script

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Part of #212090
This commit is contained in:
Daniel Imms 2024-06-10 13:38:37 -07:00
parent cd55bece71
commit a22269e421
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GPG key ID: 5F0FF45B19E3A5D2
1 changed files with 16 additions and 43 deletions
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59
src/vs/workbench/contrib/terminal/browser/media/shellIntegration-bash.sh
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@ -112,48 +112,26 @@ __vsc_escape_value() {
fi
# Process text byte by byte, not by codepoint.
builtin local LC_ALL=C str="${1}" i byte token out=''
local -r LC_ALL=C
local -r str="${1}"
local -ir len="${#str}"
local -i i
local -i val
local byte
local token
local out=''
for (( i=0; i < "${#str}"; ++i )); do
byte="${str:$i:1}"
# Escape backslashes, semi-colons specially, then special ASCII chars below space (0x20).
# This is done in an unwrapped loop instead of using printf as the latter is very slow.
if [ "$byte" = "\\" ]; then
byte="${str:$i:1}"
builtin printf -v val '%d' "'$byte"
if (( val < 31 )); then
builtin printf -v token '\\x%02x' "'$byte"
elif (( val == 92 )); then
token="\\\\"
elif [ "$byte" = ";" ]; then
elif (( val == 59 )); then
token="\\x3b"
elif [ "$byte" = $'\x00' ]; then token="\\x00"
elif [ "$byte" = $'\x01' ]; then token="\\x01"
elif [ "$byte" = $'\x02' ]; then token="\\x02"
elif [ "$byte" = $'\x03' ]; then token="\\x03"
elif [ "$byte" = $'\x04' ]; then token="\\x04"
elif [ "$byte" = $'\x05' ]; then token="\\x05"
elif [ "$byte" = $'\x06' ]; then token="\\x06"
elif [ "$byte" = $'\x07' ]; then token="\\x07"
elif [ "$byte" = $'\x08' ]; then token="\\x08"
elif [ "$byte" = $'\x09' ]; then token="\\x09"
elif [ "$byte" = $'\x0a' ]; then token="\\x0a"
elif [ "$byte" = $'\x0b' ]; then token="\\x0b"
elif [ "$byte" = $'\x0c' ]; then token="\\x0c"
elif [ "$byte" = $'\x0d' ]; then token="\\x0d"
elif [ "$byte" = $'\x0e' ]; then token="\\x0e"
elif [ "$byte" = $'\x0f' ]; then token="\\x0f"
elif [ "$byte" = $'\x10' ]; then token="\\x10"
elif [ "$byte" = $'\x11' ]; then token="\\x11"
elif [ "$byte" = $'\x12' ]; then token="\\x12"
elif [ "$byte" = $'\x13' ]; then token="\\x13"
elif [ "$byte" = $'\x14' ]; then token="\\x14"
elif [ "$byte" = $'\x15' ]; then token="\\x15"
elif [ "$byte" = $'\x16' ]; then token="\\x16"
elif [ "$byte" = $'\x17' ]; then token="\\x17"
elif [ "$byte" = $'\x18' ]; then token="\\x18"
elif [ "$byte" = $'\x19' ]; then token="\\x19"
elif [ "$byte" = $'\x1a' ]; then token="\\x1a"
elif [ "$byte" = $'\x1b' ]; then token="\\x1b"
elif [ "$byte" = $'\x1c' ]; then token="\\x1c"
elif [ "$byte" = $'\x1d' ]; then token="\\x1d"
elif [ "$byte" = $'\x1e' ]; then token="\\x1e"
elif [ "$byte" = $'\x1f' ]; then token="\\x1f"
else
token="$byte"
fi
@ -161,7 +139,7 @@ __vsc_escape_value() {
out+="$token"
done
builtin printf '%s\n' "${out}"
builtin printf '%s\n' "$out"
}
# Send the IsWindows property if the environment looks like Windows
@ -196,11 +174,6 @@ unset VSCODE_NONCE
builtin printf "\e]633;P;ContinuationPrompt=$(echo "$PS2" | sed 's/\x1b/\\\\x1b/g')\a"
__vsc_report_prompt() {
# HACK: Git bash is too slow at reporting the prompt, so skip for now
if [ "$__vsc_is_windows" = "1" ]; then
return
fi
# Expand the original PS1 similarly to how bash would normally
# See https://stackoverflow.com/a/37137981 for technique
if ((BASH_VERSINFO[0] >= 5 || (BASH_VERSINFO[0] == 4 && BASH_VERSINFO[1] >= 4))); then