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dynamic array functions
Originally committed as revision 1955 to svn://svn.ffmpeg.org/ffmpeg/trunk
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124ba5836f
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39f472c3b6
@ -428,6 +428,16 @@ int stristart(const char *str, const char *val, const char **ptr);
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void pstrcpy(char *buf, int buf_size, const char *str);
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char *pstrcat(char *buf, int buf_size, const char *s);
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void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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typeof(tab) _tab = (tab);\
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typeof(elem) _elem = (elem);\
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(void)sizeof(**_tab == _elem); /* check that types are compatible */\
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__dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
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} while(0)
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struct in_addr;
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int resolve_host(struct in_addr *sin_addr, const char *hostname);
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@ -108,3 +108,24 @@ char *pstrcat(char *buf, int buf_size, const char *s)
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}
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#endif
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/* add one element to a dynamic array */
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void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem)
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{
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int nb, nb_alloc;
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unsigned long *tab;
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nb = *nb_ptr;
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tab = *tab_ptr;
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if ((nb & (nb - 1)) == 0) {
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if (nb == 0)
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nb_alloc = 1;
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else
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nb_alloc = nb * 2;
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tab = av_realloc(tab, nb_alloc * sizeof(unsigned long));
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*tab_ptr = tab;
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}
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tab[nb++] = elem;
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*nb_ptr = nb;
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}
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