/usr/share/systemtap/tapset
Edit: /usr/share/systemtap/tapset/tokenize.stp (2124B)
// Tokenize tapset
// Copyright (C) 2010-2018 Red Hat, Inc.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
%{
#define STAP_NEED_CONTEXT_TOKENIZE 1
%}
/**
* sfunction tokenize - Return the next non-empty token in a string
*
* @delim: set of characters that delimit the tokens
*
* Description: This function returns the next token in the string
* passed in the previous call to tokenize. If no delimiter is found,
* the entire remaining input string is * returned. It returns empty
* when no more tokens are available.
*/
function tokenize:string(delim:string) {
return tokenize("", delim)
}
/**
* sfunction tokenize - Return the next non-empty token in a string
*
* @input: string to tokenize. If empty, returns the next non-empty token
* in the string passed in the previous call to tokenize().
* @delim: set of characters that delimit the tokens
*
* Description: This function returns the next non-empty token in the
* given input string, where the tokens are delimited by characters in
* the delim string. If the input string is non-empty, it returns the
* first token. If the input string is empty, it returns the next
* token in the string passed in the previous call to tokenize.
* If no delimiter is found, the entire remaining input string is
* returned. It returns empty when no more tokens are available.
*/
function tokenize:string(input:string, delim:string)
%{ /* unprivileged */ /* unmodified-fnargs */
char *token = NULL;
char *token_end = NULL;
if (STAP_ARG_input[0]) {
strlcpy(CONTEXT->tok_str, STAP_ARG_input, MAXSTRINGLEN);
CONTEXT->tok_start = &CONTEXT->tok_str[0];
CONTEXT->tok_end = &CONTEXT->tok_str[0] + strlen(CONTEXT->tok_str);
}
do {
token = strsep(& CONTEXT->tok_start, STAP_ARG_delim);
} while (token && !token[0]);
if (token) {
token_end = (CONTEXT->tok_start ? CONTEXT->tok_start - 1 : CONTEXT->tok_end);
memcpy(STAP_RETVALUE, token, token_end - token + 1);
}
%}