feat(user/bk-copy-rand-music):Optimize file processing

[BK-2020-03.git] / unitproc / bkt-insertStr

diff --git a/unitproc/bkt-insertStr b/unitproc/bkt-insertStr
index 6cea251bbba541001398509e6ad6ae3398a89de3..5fdbf93abc130ad008136b12ccb4dd4345aa3b8c 100755 (executable)
--- a/unitproc/bkt-insertStr
+++ b/unitproc/bkt-insertStr
@@ -1,21 +1,23 @@
 #!/usr/bin/env bash
 # Desc: Insert string into provided string
 
-yell() { echo "$0:${FUNCNAME[*]}: $*" >&2; }
+yell() { echo "$0: $*" >&2; }
 die() { yell "$*"; exit 111; }
 must() { "$@" || die "cannot $*"; }
-
 insertStr() {
-    # Desc: Inserts a
+    # Desc: Inserts a string into another string at a specified position.
     # Input: arg1: str   str_rec  String to receive insertion
     #        arg2: int   pos      Insertion position (0 = append to front)
     #        arg3: str   str_ins  String to be inserted
     # Output: stdout:    Combined string
-    # Version: 0.0.1
+    # Version: 0.0.2
     # Depends: BK-2020-03: yell(), die(), must()
     # Ref/Attrib: * BK-2020-03: https://gitlab.com/baltakatei/baltakatei-exdev/
-    
-    local str_rec pos str_ins;
+    #             * Cooper, Mendel. “Advanced Bash-Scripting Guide: Manipulating Strings”. tldp.org https://tldp.org/LDP/abs/html/string-manipulation.html
+
+    local str_rec pos str_ins re len_str_rec;
+    local pfx_pos_start pfx_len pfx;
+    local sfx_pos_start sfx_len sfx;
 
     # Check args
     if [[ $# -ne 3 ]]; then
@@ -31,7 +33,6 @@ insertStr() {
 
     # Calculate string stats
     len_str_rec="${#str_rec}";
-    len_str_ins="${#str_ins}";
 
     # Form prefix
     pfx_pos_start="0";
@@ -44,7 +45,7 @@ insertStr() {
     sfx="${str_rec:$sfx_pos_start:$sfx_len}";
 
     # Print output to stdout
-    printf "%s%s%s\n" "$pfx" "$str_ins" "$sfx";    
+    printf "%s%s%s\n" "$pfx" "$str_ins" "$sfx";
 }; # Insert string provided at indicated position via stdout