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-rw-r--r--src/Xv.c191
1 files changed, 110 insertions, 81 deletions
diff --git a/src/Xv.c b/src/Xv.c
index 8e069c0..d3e3373 100644
--- a/src/Xv.c
+++ b/src/Xv.c
@@ -129,6 +129,7 @@ XvQueryExtension(
XExtDisplayInfo *info = xv_find_display(dpy);
xvQueryExtensionReq *req;
xvQueryExtensionReply rep;
+ int status;
XvCheckExtension(dpy, info, XvBadExtension);
@@ -137,9 +138,8 @@ XvQueryExtension(
XvGetReq(QueryExtension, req);
if (!_XReply(dpy, (xReply *) &rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return XvBadExtension;
+ status = XvBadExtension;
+ goto out;
}
*p_version = rep.version;
@@ -148,10 +148,13 @@ XvQueryExtension(
*p_eventBase = info->codes->first_event;
*p_errorBase = info->codes->first_error;
+ status = Success;
+
+ out:
UnlockDisplay(dpy);
SyncHandle();
- return Success;
+ return status;
}
int
@@ -167,15 +170,16 @@ XvQueryAdaptors(
size_t size;
unsigned int ii, jj;
char *name;
- XvAdaptorInfo *pas, *pa;
+ XvAdaptorInfo *pas = NULL, *pa;
XvFormat *pfs, *pf;
- char *buffer;
+ char *buffer = NULL;
union {
char *buffer;
char *string;
xvAdaptorInfo *pa;
xvFormat *pf;
} u;
+ int status;
XvCheckExtension(dpy, info, XvBadExtension);
@@ -187,35 +191,40 @@ XvQueryAdaptors(
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadReply);
+ rep.num_adaptors = 0;
+ status = XvBadReply;
+ goto out;
}
size = rep.length << 2;
- if ((buffer = Xmalloc(size)) == NULL) {
- _XEatDataWords(dpy, rep.length);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ if (size > 0) {
+ if ((buffer = Xmalloc(size)) == NULL) {
+ _XEatDataWords(dpy, rep.length);
+ status = XvBadAlloc;
+ goto out;
+ }
+ _XRead(dpy, buffer, (long) size);
}
- _XRead(dpy, buffer, (long) size);
-
- u.buffer = buffer;
/* GET INPUT ADAPTORS */
if (rep.num_adaptors == 0) {
- pas = NULL;
+ /* If there's no adaptors, there's nothing more to do. */
+ status = Success;
+ goto out;
}
- else {
- size = rep.num_adaptors * sizeof(XvAdaptorInfo);
- if ((pas = Xmalloc(size)) == NULL) {
- Xfree(buffer);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
- }
+
+ if (size < (rep.num_adaptors * sz_xvAdaptorInfo)) {
+ /* If there's not enough data for the number of adaptors,
+ then we have a problem. */
+ status = XvBadReply;
+ goto out;
+ }
+
+ size = rep.num_adaptors * sizeof(XvAdaptorInfo);
+ if ((pas = Xmalloc(size)) == NULL) {
+ status = XvBadAlloc;
+ goto out;
}
/* INIT ADAPTOR FIELDS */
@@ -228,6 +237,7 @@ XvQueryAdaptors(
pa++;
}
+ u.buffer = buffer;
pa = pas;
for (ii = 0; ii < rep.num_adaptors; ii++) {
pa->type = u.pa->type;
@@ -242,11 +252,8 @@ XvQueryAdaptors(
u.buffer += pad_to_int32(sz_xvAdaptorInfo);
if ((name = Xmalloc(size + 1)) == NULL) {
- XvFreeAdaptorInfo(pas);
- Xfree(buffer);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ status = XvBadAlloc;
+ goto out;
}
(void) strncpy(name, u.string, size);
name[size] = '\0';
@@ -258,11 +265,8 @@ XvQueryAdaptors(
size = pa->num_formats * sizeof(XvFormat);
if ((pfs = Xmalloc(size)) == NULL) {
- XvFreeAdaptorInfo(pas);
- Xfree(buffer);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ status = XvBadAlloc;
+ goto out;
}
pf = pfs;
@@ -280,6 +284,14 @@ XvQueryAdaptors(
}
+ status = Success;
+
+ out:
+ if (status != Success) {
+ XvFreeAdaptorInfo(pas);
+ pas = NULL;
+ }
+
*p_nAdaptors = rep.num_adaptors;
*p_pAdaptors = pas;
@@ -287,7 +299,7 @@ XvQueryAdaptors(
UnlockDisplay(dpy);
SyncHandle();
- return (Success);
+ return status;
}
@@ -327,13 +339,14 @@ XvQueryEncodings(
size_t size;
unsigned int jj;
char *name;
- XvEncodingInfo *pes, *pe;
- char *buffer;
+ XvEncodingInfo *pes = NULL, *pe;
+ char *buffer = NULL;
union {
char *buffer;
char *string;
xvEncodingInfo *pe;
} u;
+ int status;
XvCheckExtension(dpy, info, XvBadExtension);
@@ -345,30 +358,40 @@ XvQueryEncodings(
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadReply);
+ rep.num_encodings = 0;
+ status = XvBadReply;
+ goto out;
}
size = rep.length << 2;
- if ((buffer = Xmalloc(size)) == NULL) {
- _XEatDataWords(dpy, rep.length);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ if (size > 0) {
+ if ((buffer = Xmalloc(size)) == NULL) {
+ _XEatDataWords(dpy, rep.length);
+ status = XvBadAlloc;
+ goto out;
+ }
+ _XRead(dpy, buffer, (long) size);
}
- _XRead(dpy, buffer, (long) size);
-
- u.buffer = buffer;
/* GET ENCODINGS */
+ if (rep.num_encodings == 0) {
+ /* If there's no encodings, there's nothing more to do. */
+ status = Success;
+ goto out;
+ }
+
+ if (size < (rep.num_encodings * sz_xvEncodingInfo)) {
+ /* If there's not enough data for the number of adaptors,
+ then we have a problem. */
+ status = XvBadReply;
+ goto out;
+ }
+
size = rep.num_encodings * sizeof(XvEncodingInfo);
if ((pes = Xmalloc(size)) == NULL) {
- Xfree(buffer);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ status = XvBadAlloc;
+ goto out;
}
/* INITIALIZE THE ENCODING POINTER */
@@ -380,6 +403,8 @@ XvQueryEncodings(
pe++;
}
+ u.buffer = buffer;
+
pe = pes;
for (jj = 0; jj < rep.num_encodings; jj++) {
pe->encoding_id = u.pe->encoding;
@@ -393,11 +418,8 @@ XvQueryEncodings(
u.buffer += pad_to_int32(sz_xvEncodingInfo);
if ((name = Xmalloc(size + 1)) == NULL) {
- XvFreeEncodingInfo(pes);
- Xfree(buffer);
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadAlloc);
+ status = XvBadAlloc;
+ goto out;
}
strncpy(name, u.string, size);
name[size] = '\0';
@@ -407,6 +429,14 @@ XvQueryEncodings(
u.buffer += pad_to_int32(size);
}
+ status = Success;
+
+ out:
+ if (status != Success) {
+ XvFreeEncodingInfo(pes);
+ pes = NULL;
+ }
+
*p_nEncodings = rep.num_encodings;
*p_pEncodings = pes;
@@ -727,6 +757,7 @@ XvGetPortAttribute(Display *dpy, XvPortID port, Atom attribute, int *p_value)
XExtDisplayInfo *info = xv_find_display(dpy);
xvGetPortAttributeReq *req;
xvGetPortAttributeReply rep;
+ int status;
XvCheckExtension(dpy, info, XvBadExtension);
@@ -739,17 +770,17 @@ XvGetPortAttribute(Display *dpy, XvPortID port, Atom attribute, int *p_value)
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadReply);
+ status = XvBadReply;
+ }
+ else {
+ *p_value = rep.value;
+ status = Success;
}
-
- *p_value = rep.value;
UnlockDisplay(dpy);
SyncHandle();
- return (Success);
+ return status;
}
int
@@ -767,6 +798,7 @@ XvQueryBestSize(
XExtDisplayInfo *info = xv_find_display(dpy);
xvQueryBestSizeReq *req;
xvQueryBestSizeReply rep;
+ int status;
XvCheckExtension(dpy, info, XvBadExtension);
@@ -783,18 +815,18 @@ XvQueryBestSize(
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return (XvBadReply);
+ status = XvBadReply;
+ }
+ else {
+ *p_actual_width = rep.actual_width;
+ *p_actual_height = rep.actual_height;
+ status = Success;
}
-
- *p_actual_width = rep.actual_width;
- *p_actual_height = rep.actual_height;
UnlockDisplay(dpy);
SyncHandle();
- return (Success);
+ return status;
}
@@ -818,9 +850,7 @@ XvQueryPortAttributes(Display *dpy, XvPortID port, int *num)
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return ret;
+ goto out;
}
/*
@@ -875,6 +905,7 @@ XvQueryPortAttributes(Display *dpy, XvPortID port, int *num)
_XEatDataWords(dpy, rep.length);
}
+ out:
UnlockDisplay(dpy);
SyncHandle();
@@ -901,9 +932,7 @@ XvListImageFormats(Display *dpy, XvPortID port, int *num)
/* READ THE REPLY */
if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == 0) {
- UnlockDisplay(dpy);
- SyncHandle();
- return NULL;
+ goto out;
}
if (rep.num_formats) {
@@ -945,6 +974,7 @@ XvListImageFormats(Display *dpy, XvPortID port, int *num)
_XEatDataWords(dpy, rep.length);
}
+ out:
UnlockDisplay(dpy);
SyncHandle();
@@ -978,9 +1008,7 @@ XvCreateImage(
/* READ THE REPLY */
if (!_XReply(dpy, (xReply *) &rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return NULL;
+ goto out;
}
if (rep.num_planes < ((INT_MAX >> 3) - sizeof(XvImage)))
@@ -1002,6 +1030,7 @@ XvCreateImage(
else
_XEatDataWords(dpy, rep.length);
+ out:
UnlockDisplay(dpy);
SyncHandle();
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