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<div class="title">strtok.c</div> </div>
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<a href="strtok_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="include_2sys_2types_8h.html">sys/types.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="strtok_8c.html#af18c3fca5cc30bc1313728d45c031ae9"> 32</a></span> <span class="keywordtype">char</span> *<a class="code" href="strtok_8c.html#af18c3fca5cc30bc1313728d45c031ae9">strtok_r</a>(<span class="keywordtype">char</span> *s, <span class="keyword">const</span> <span class="keywordtype">char</span> *delim, <span class="keywordtype">char</span> **last) {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordtype">char</span> *spanp, *tok;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordtype">int</span> c, sc;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">if</span> (s == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> && (s = *last) == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">return</span> (<a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * Skip (span) leading delimiters (s += strspn(s, delim), sort of).</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  cont: c = *s++;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">for</span> (spanp = (<span class="keywordtype">char</span> *) delim; (sc = *spanp++) != 0;) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">if</span> (c == sc)</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">goto</span> cont;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  }</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (c == 0) { <span class="comment">/* no non-delimiter characters */</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  *last = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> (<a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  tok = s - 1;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * Note that delim must have one NUL; we stop if we see that, too.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">for</span> (;;) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  c = *s++;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  spanp = (<span class="keywordtype">char</span> *) delim;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> ((sc = *spanp++) == c) {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">if</span> (c == 0)</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  s = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  s[-1] = <span class="charliteral">'\0'</span>;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  *last = s;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> (tok);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  } <span class="keywordflow">while</span> (sc != 0);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">/* NOTREACHED */</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> (<a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="strtok_8c.html#a80f8fb5a529dbd4b3efb2575764d850e"> 76</a></span> <span class="keywordtype">char</span> *<a class="code" href="strtok_8c.html#a80f8fb5a529dbd4b3efb2575764d850e">strtok</a>(<span class="keywordtype">char</span> *s, <span class="keyword">const</span> <span class="keywordtype">char</span> *delim) {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">static</span> <span class="keywordtype">char</span> *last;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">return</span> (<a class="code" href="strtok_8c.html#af18c3fca5cc30bc1313728d45c031ae9">strtok_r</a>(s, delim, &last));</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> }</div>
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<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="string_8h.html">string.h</a></div></div>
<div class="ttc" id="astrtok_8c_html_af18c3fca5cc30bc1313728d45c031ae9"><div class="ttname"><a href="strtok_8c.html#af18c3fca5cc30bc1313728d45c031ae9">strtok_r</a></div><div class="ttdeci">char * strtok_r(char *s, const char *delim, char **last)</div><div class="ttdef"><b>Definition:</b> <a href="strtok_8c_source.html#l00032">strtok.c:32</a></div></div>
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<div class="ttc" id="astrtok_8c_html_a80f8fb5a529dbd4b3efb2575764d850e"><div class="ttname"><a href="strtok_8c.html#a80f8fb5a529dbd4b3efb2575764d850e">strtok</a></div><div class="ttdeci">char * strtok(char *s, const char *delim)</div><div class="ttdef"><b>Definition:</b> <a href="strtok_8c_source.html#l00076">strtok.c:76</a></div></div>
<div class="ttc" id="afat__string_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="fat__string_8h_source.html#l00017">fat_string.h:17</a></div></div>
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