str2long

long test(const char*pstr)

{

#define MAX_LONG 0x7FFFFFFF

long lRet = 0;

int signal = 1;

if (NULL==pstr || '/0'==pstr)

{

return MAX_LONG;

}

if (*pstr=='-')

{

signal = -1;

pstr ++;

}

while(*pstr!='/0')

{

if(*pstr>='0' && *pstr<='9')

{

lRet = lRet>(lRet*10 + *pstr-'0') ? MAX_LONG:lRet*10 + *pstr-'0';

}

else

{

return MAX_LONG;

}

pstr ++;

}

return lRet*signal;

#undef MAX_LONG

}