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annotate dmd2/lstring.c @ 856:bdb3627265eb

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author Christian Kamm <kamm incasoftware de>
date Wed, 17 Dec 2008 18:20:45 +0100
parents 356e65836fb5
children
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f04dde6e882c Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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1 // lstring.c
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2
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3 // Copyright (c) 1999-2002 by Digital Mars
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4 // All Rights Reserved
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5 // written by Walter Bright
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6 // www.digitalmars.com
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7 // License for redistribution is by either the Artistic License
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8 // in artistic.txt, or the GNU General Public License in gnu.txt.
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9 // See the included readme.txt for details.
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10
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11 #include <stdlib.h>
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12
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13 #include "dchar.h"
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14 #include "mem.h"
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15 #include "lstring.h"
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16
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17 #ifdef _MSC_VER // prevent compiler internal crash
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18 Lstring Lstring::zero;
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19 #else
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20 Lstring Lstring::zero = LSTRING_EMPTY();
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21 #endif
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22
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23 Lstring *Lstring::ctor(const dchar *p, unsigned length)
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24 {
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25 Lstring *s;
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26
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27 s = alloc(length);
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28 memcpy(s->string, p, length * sizeof(dchar));
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29 return s;
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30 }
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31
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32 Lstring *Lstring::alloc(unsigned length)
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33 {
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34 Lstring *s;
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35
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36 s = (Lstring *)mem.malloc(size(length));
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37 s->length = length;
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38 s->string[length] = 0;
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39 return s;
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40 }
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41
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42 Lstring *Lstring::append(const Lstring *s)
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43 {
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44 Lstring *t;
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45
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46 if (!s->length)
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47 return this;
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48 t = alloc(length + s->length);
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49 memcpy(t->string, string, length * sizeof(dchar));
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50 memcpy(t->string + length, s->string, s->length * sizeof(dchar));
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51 return t;
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52 }
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53
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54 Lstring *Lstring::substring(int start, int end)
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55 {
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56 Lstring *t;
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57
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58 if (start == end)
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59 return &zero;
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60 t = alloc(end - start);
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61 memcpy(t->string, string + start, (end - start) * sizeof(dchar));
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62 return t;
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63 }