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annotate dbhelpers.c @ 1547:2c902644036d

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avoid warning about port
author Matt Johnston <matt@ucc.asn.au>
date Mon, 26 Feb 2018 23:12:02 +0800
parents 3017bc7d6238
children 4b1a807a3188
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3017bc7d6238 move m_burn and function attributes to dbhelpers
Matt Johnston <matt@ucc.asn.au>
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1 #include "dbhelpers.h"
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2 #include "includes.h"
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3
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4 /* Erase data */
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5 void m_burn(void *data, unsigned int len) {
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6
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7 #if defined(HAVE_MEMSET_S)
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8 memset_s(data, len, 0x0, len);
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9 #elif defined(HAVE_EXPLICIT_BZERO)
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10 explicit_bzero(data, len);
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11 #else
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12 /* Based on the method in David Wheeler's
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13 * "Secure Programming for Linux and Unix HOWTO". May not be safe
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14 * against link-time optimisation. */
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15 volatile char *p = data;
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16
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17 if (data == NULL)
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18 return;
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19 while (len--) {
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20 *p++ = 0x0;
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21 }
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22 #endif
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23 }
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