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1 #include "dmlib.h"
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2 #include <stdarg.h>
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3
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4 /* strdup with a NULL check
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5 */
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6 char *dm_strdup(const char *s)
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7 {
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8 char *res;
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9 if (s == NULL)
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10 return NULL;
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11
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12 if ((res = dmMalloc(strlen(s) + 1)) == NULL)
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13 return NULL;
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14
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15 strcpy(res, s);
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16 return res;
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17 }
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18
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19
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20 /* Simulate a sprintf() that allocates memory
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21 */
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22 char *dm_strdup_vprintf(const char *fmt, va_list args)
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23 {
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24 int size = 64;
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25 char *buf;
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26
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27 if ((buf = dmMalloc(size)) == NULL)
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28 return NULL;
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29
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30 while (1)
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31 {
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32 int n;
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33 va_list ap;
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34 va_copy(ap, args);
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35 n = vsnprintf(buf, size, fmt, ap);
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36 va_end(ap);
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37
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38 if (n > -1 && n < size)
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39 return buf;
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40 if (n > -1)
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41 size = n + 1;
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42 else
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43 size *= 2;
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44
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45 if ((buf = dmRealloc(buf, size)) == NULL)
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46 return NULL;
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47 }
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48 }
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49
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50
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51 char *dm_strdup_printf(const char *fmt, ...)
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52 {
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53 char *res;
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54 va_list ap;
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55
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56 va_start(ap, fmt);
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57 res = dm_strdup_vprintf(fmt, ap);
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58 va_end(ap);
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59
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60 return res;
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61 }
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