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tokenise_drop.go
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tokenise_drop.go
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// vi: sw=4 ts=4:
/*
---------------------------------------------------------------------------
Copyright (c) 2013-2015 AT&T Intellectual Property
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at:
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
---------------------------------------------------------------------------
*/
package token
import (
"strings";
)
/*
---------------------------------------------------------------------------------------
Mnemonic: tokenise_drop
Returns: ntokens, tokens[]
Date: 22 Apr 2012
Author: E. Scott Daniels
Mod: 03 Feb 2015 - Removed unreachable code
07 Jun 2018 : Remove unreachable code (keep vet happy)
---------------------------------------------------------------------------------------
*/
/*
Takes a string and slices it into tokens using the characters in sepchrs
as the breaking points. The separation characters are discarded.
*/
func Tokenise_drop( buf string, sepchrs string ) ( ntokens int, tokens []string) {
var idx int;
idx = 0;
tokens = make( []string, 2048 );
sepchrs += "\\";
subbuf := buf;
tokens[idx] = "";
for {
if i := strings.IndexAny( subbuf, sepchrs ); i >= 0 {
if subbuf[i:i+1] == "\\" { // next character is escaped
tokens[idx] += subbuf[0:i]; // add everything before slant
tokens[idx] += subbuf[i+1:i+2]; // add escaped char
subbuf = subbuf[i+2:]; // advance past escaped char
} else {
if i > 0 { // characters before the sep, capture them
tokens[idx] += subbuf[0:i]; // add everything before separator
}
idx++;
tokens[idx] = "";
subbuf = subbuf[i+1:];
}
} else {
tokens[idx] += subbuf[:len( subbuf )];
tokens = tokens[0:idx+1]
ntokens = idx + 1
return
}
if len( subbuf ) < 1 {
ntokens = idx
tokens = tokens[0:idx+1];
return
}
}
}