Commit 3aec0d7b by Eric Coissac

Add function for estimating the size of an obitype or of an array of

obitype.
parent 57db677d
/*
* obitypes.c
*
* Created on: 23 mai 2015
* Author: coissac
*/
#include <obitypes.h>
size_t obi_sizeof(OBIType_t type) {
size_t size=0
switch (type) {
case OBI_VOID: size = 1;
break;
case OBI_INT: size = sizeof(obiint_t);
break;
case OBI_FLOAT: size = sizeof(obifloat_t);
break;
case OBI_CHAR: size = sizeof(obichar_t);
break;
case OBI_IDX: size = sizeof(obiidx_t);
break;
default: size = 0;
}
return size;
}
size_t obi_array_sizeof(OBIType_t type,size_t nbelement) {
size_t size;
size_t rsize;
size_t psize;
size = obi_sizeof(type) * nbelement;
psize= getpagesize();
rsize= size % psize;
// Round at a size multiple of pagesize
if (rsize)
size = (size / psize) * psize + psize;
return size;
}
/****************************************************************************
* OBITypes header file *
****************************************************************************/
/**
* @file obitypes.h
* @author Celine Mercier
......@@ -13,6 +9,7 @@
#define OBITYPES_H_
#include <stdio.h>
#include <unistd.h>
#define OBIInt_NA (INT32_MIN)
#define OBIFloat_NA (NAN)
......@@ -35,10 +32,10 @@ typedef enum {
typedef enum OBIType {
OBI_VOID = 0, /**< data type not specified */
OBIInt_t, /**< a signed integer value (C type : int32_t) */
OBIFloat_t, /**< a floating value (C type : double) */
OBIChar_t, /**< a character (C type : char) */
OBIIdx_t /**< an index in a data structure (C type : size_t) */
OBI_INT, /**< a signed integer value (C type : int32_t) */
OBI_FLOAT, /**< a floating value (C type : double) */
OBI_CHAR, /**< a character (C type : char) */
OBI_IDX /**< an index in a data structure (C type : size_t) */
} OBIType_t, *OBIType_p;
typedef int32_t obiint_t;
......@@ -46,5 +43,34 @@ typedef double obifloat_t;
typedef char obichar_t;
typedef size_t obiidx_t;
/**
* @brief returns the memory size in bytes of an OBIType
*
* @param type the OBIType code used as query
*
* @return the size in bytes of the type
* @retval 0 on error (unknown type)
*
* @since May 2015
* @author Eric Coissac (eric.coissac@metabarcoding.org)
*/
size_t obi_sizeof(OBIType_t type);
/**
* @brief returns the size requested to store an array of OBIType
*
* The returned size is enouth large to store an array of size nbelement
* but rounded at a multiple of the memory page size.
*
* @param type the OBIType code used as query
* @param nbelement the number of element to be stored
*
* @return the size in bytes of the type
* @retval 0 on error (unknown type)
*
* @since May 2015
* @author Eric Coissac (eric.coissac@metabarcoding.org)
*/
size_t obi_array_sizeof(OBIType_t type,size_t nbelement);
#endif /* OBITYPES_H_ */
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