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source: orxonox.OLD/trunk/src/lib/util/substring.cc @ 5182

Last change on this file since 5182 was 5150, checked in by bensch, 19 years ago

orxonox/trunk: SubString is now Safe also for NULL and 1 parameters

File size: 2.5 KB
Line 
1/*
2   orxonox - the future of 3D-vertical-scrollers
3
4   Copyright (C) 2004 orx
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2, or (at your option)
9   any later version.
10
11   ### File Specific:
12   main-programmer: Christian Meyer
13   co-programmer: Benjamin Grauer
14
15   2005-06-10: some naming conventions
16*/
17
18
19/**
20 *  breaks a string into parts that were initially seperated by comma
21 * @param string the string to break into substrings
22*/
23
24#include "substring.h"
25
26#include "debug.h"
27#include <string.h>
28#include <assert.h>
29
30SubString::SubString( const char* string, char splitter)
31{
32  this->splittersCount = 0;
33  if (string == NULL)
34  {
35    this->strings = NULL;
36    return;
37  }
38
39  for( int i = 0; i < strlen(string); i++)
40    if( string[i] == splitter)
41      this->splittersCount++;
42
43  this->splittersCount += 1;
44
45  this->strings = new char*[this->splittersCount];
46  assert (strings != NULL);
47
48  int i = 0;
49  int l = 0;
50
51  if( this->splittersCount > 1)
52  {
53    const char* offset = string;
54    char* end = strchr( string, splitter);
55    while( end != NULL)
56    {
57      assert( i < this->splittersCount);
58      l = end - offset;
59      this->strings[i] = new char[l + 1];
60      assert( strings[i] != NULL);
61      strncpy( strings[i], offset, l);
62      strings[i][l] = 0;
63      i++;
64      end++;
65      offset = end;
66      end = strchr( offset, splitter);
67    }
68
69    strings[i] = new char[l + 1];
70    l = strlen( offset);
71    strncpy( strings[i], offset, l);
72    strings[i][l] = '\0';
73  }
74  else
75  {
76    this->strings[0] = new char[strlen(string)];
77    strcpy(this->strings[0], string);
78  }
79}
80
81/**
82 *  removes the object from memory
83*/
84SubString::~SubString()
85{
86  if (this->strings)
87  {
88    for( int i = 0; i < this->splittersCount; i++)
89      delete[] this->strings[i];
90    delete[] this->strings;
91  }
92}
93
94/**
95 *  get a particular substring
96 * @param i the ID of the substring to return
97 * @returns the designated substring or NULL if an invalid ID was given
98*/
99const char* SubString::getString(unsigned int i)
100{
101  if( i < this->splittersCount && i >= 0)
102    return this->strings[i];
103  else
104    return NULL;
105}
106
107
108
109/**
110 * Some nice debug information about this SubString
111 */
112void SubString::debug() const
113{
114  PRINT(0)("Substring-information::count=%d ::", this->splittersCount);
115  for (int i = 0; i < this->splittersCount; i++)
116    PRINT(0)("s%d:%s::", i, this->strings[i]);
117  PRINT(0)("\n");
118}
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