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Insure strings created by &lef and &mid are properly terminated.

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This commit is contained in:
Renaud 2015-01-06 17:55:11 +08:00
parent e096092d5b
commit 534da43d08
1 changed files with 20 additions and 5 deletions
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25
eval.c
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@ -362,14 +362,29 @@ char *gtfun(char *fname)
case UFCAT:
strcpy(result, arg1);
return strcat(result, arg2);
case UFLEFT:
return strncpy(result, arg1, atoi(arg2));
case UFLEFT: {
int sz ;
sz = atoi( arg2) ;
if( sz >= sizeof result)
sz = sizeof result - 1 ;
strncpy( result, arg1, sz) ;
result[ sz] = 0 ;
return result ;
}
case UFRIGHT:
return (strcpy(result,
&arg1[(strlen(arg1) - atoi(arg2))]));
case UFMID:
return (strncpy(result, &arg1[atoi(arg2) - 1],
atoi(arg3)));
case UFMID: {
int sz ;
sz = atoi( arg3) ;
if( sz >= sizeof result)
sz = sizeof result - 1 ;
strncpy( result, &arg1[ atoi( arg2) - 1], sz) ;
result[ sz] = 0 ;
return result ;
}
case UFNOT:
return ltos(stol(arg1) == FALSE);
case UFEQUAL: