thodg/libgit2/src/util.h

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• Hash : 3a2aabdc
  Author :
  Date : 2008-11-22T14:44:47
  

  Add util.h - utility macros ARRAY_SIZE() et al go in util.h, included from common.h Signed-off-by: Andreas Ericsson <ae@op5.se> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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• src/util.h

• #ifndef INCLUDE_util_h__
  #define INCLUDE_util_h__
  
  #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  
  /*
   * Realloc the buffer pointed at by variable 'x' so that it can hold
   * at least 'nr' entries; the number of entries currently allocated
   * is 'alloc', using the standard growing factor alloc_nr() macro.
   *
   * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
   */
  #define alloc_nr(x) (((x)+16)*3/2)
  #define ALLOC_GROW(x, nr, alloc) \
  	do { \
  		if ((nr) > alloc) { \
  			if (alloc_nr(alloc) < (nr)) \
  				alloc = (nr); \
  			else \
  				alloc = alloc_nr(alloc); \
  			x = xrealloc((x), alloc * sizeof(*(x))); \
  		} \
  	} while(0)
  
  #endif /* INCLUDE_util_h__ */
  

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