rusefi
/
lua
mirror of https://github.com/rusefi/lua.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

if numeral overflows the reading buffer, signal it as invalid input 

(resulting in nil)
This commit is contained in:
Roberto Ierusalimschy 2014-06-02 00:00:51 -03:00
parent 11aefa4478
commit e9d86eddf3
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
liolib.c
View File

@ -1,5 +1,5 @@
/* /*
** $Id: liolib.c,v 2.124 2014/05/15 15:21:06 roberto Exp $ ** $Id: liolib.c,v 2.125 2014/05/21 15:24:21 roberto Exp roberto $
** Standard I/O (and system) library ** Standard I/O (and system) library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -371,7 +371,7 @@ typedef struct {
FILE *f; /* file being read */ FILE *f; /* file being read */
int c; /* current character (look ahead) */ int c; /* current character (look ahead) */
int n; /* number of elements in buffer 'buff' */ int n; /* number of elements in buffer 'buff' */
char buff[MAXRN]; char buff[MAXRN + 1]; /* +1 for ending '\0' */
} RN; } RN;
@ -379,8 +379,10 @@ typedef struct {
** Add current char to buffer (if not out of space) and read next one ** Add current char to buffer (if not out of space) and read next one
*/ */
static int nextc (RN *rn) { static int nextc (RN *rn) {
if (rn->n >= MAXRN) /* buffer overflow? */ if (rn->n >= MAXRN) { /* buffer overflow? */
rn->buff[0] = '\0'; /* invalidate result */
return 0; /* fail */ return 0; /* fail */
}
else { else {
rn->buff[rn->n++] = rn->c; /* save current char */ rn->buff[rn->n++] = rn->c; /* save current char */
rn->c = l_getc(rn->f); /* read next one */ rn->c = l_getc(rn->f); /* read next one */