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eval: Check for return value of memory allocations.

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Originally committed as revision 19827 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla 2009-09-12 17:59:19 +00:00
parent 7ef618796a
commit 0345f36bbd
1 changed files with 13 additions and 0 deletions
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13
libavcodec/eval.c
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@ -185,6 +185,9 @@ static AVEvalExpr * parse_primary(Parser *p) {
char *next= p->s;
int i;
if (!d)
return NULL;
/* number */
d->value = av_strtod(p->s, &next);
if(next != p->s){
@ -288,6 +291,8 @@ static AVEvalExpr * parse_primary(Parser *p) {
static AVEvalExpr * new_eval_expr(int type, int value, AVEvalExpr *p0, AVEvalExpr *p1){
AVEvalExpr * e = av_mallocz(sizeof(AVEvalExpr));
if (!e)
return NULL;
e->type =type ;
e->value =value ;
e->param[0] =p0 ;
@ -307,6 +312,8 @@ static AVEvalExpr * parse_factor(Parser *p){
while(p->s[0]=='^'){
p->s++;
e= new_eval_expr(e_pow, 1, e, parse_pow(p, &sign2));
if (!e)
return NULL;
if (e->param[1]) e->param[1]->value *= (sign2|1);
}
if (e) e->value *= (sign|1);
@ -318,6 +325,8 @@ static AVEvalExpr * parse_term(Parser *p){
while(p->s[0]=='*' || p->s[0]=='/'){
int c= *p->s++;
e= new_eval_expr(c == '*' ? e_mul : e_div, 1, e, parse_factor(p));
if (!e)
return NULL;
}
return e;
}
@ -326,6 +335,8 @@ static AVEvalExpr * parse_subexpr(Parser *p) {
AVEvalExpr * e = parse_term(p);
while(*p->s == '+' || *p->s == '-') {
e= new_eval_expr(e_add, 1, e, parse_term(p));
if (!e)
return NULL;
};
return e;
@ -343,6 +354,8 @@ static AVEvalExpr * parse_expr(Parser *p) {
while(*p->s == ';') {
p->s++;
e= new_eval_expr(e_last, 1, e, parse_subexpr(p));
if (!e)
return NULL;
};
p->stack_index++;