nsprpub/lib/libc/src/strlen.c

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  37
  38 #include "plstr.h"
  39 #include "prtypes.h"
  40 #include "prlog.h"
  41 #include <string.h>
  42
  43 PR_IMPLEMENT(PRUint32)
  44 PL_strlen(const char *str)
  45 {
  46     size_t l;
  47
  48     if( (const char *)0 == str ) return 0;
  49
  50     l = strlen(str);
  51
  52     /* error checking in case we have a 64-bit platform -- make sure
  53      * we don't have ultra long strings that overflow an int32
  54      */
  55     if( sizeof(PRUint32) < sizeof(size_t) )
  56         PR_ASSERT(l < 2147483647);
  57
  58     return (PRUint32)l;
  59 }
  60
  61 PR_IMPLEMENT(PRUint32)
  62 PL_strnlen(const char *str, PRUint32 max)
  63 {
  64     register const char *s;
  65
  66     if( (const char *)0 == str ) return 0;
  67     for( s = str; max && *s; s++, max-- )
  68         ;
  69
  70     return (PRUint32)(s - str);
  71 }