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Refactor pointer arithmetic on void*

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This is a GCC extension, illegal in ISO C. IAR generates errors Pa152
'these operand types cannot be used here' and Pe852 'expression must be a
pointer to a complete object type'.

Replace with uint8_t*.
This commit is contained in:
Ben Avison 2022-09-05 12:50:05 +01:00
parent 6dfc857b91
commit 16518dcbbb
1 changed files with 44 additions and 45 deletions
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83
src/class/video/video_device.c
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@ -80,7 +80,7 @@ typedef struct TU_ATTR_PACKED {
/* video control interface */
typedef struct TU_ATTR_PACKED {
void const *beg; /* The head of the first video control interface descriptor */
uint8_t const *beg; /* The head of the first video control interface descriptor */
uint16_t len; /* Byte length of the descriptors */
uint16_t cur; /* offset for current video control interface */
uint8_t stm[CFG_TUD_VIDEO_STREAMING]; /* Indices of streaming interface */
@ -108,9 +108,9 @@ static uint8_t const _cap_get_set = 0x3u; /* support for GET and SET */
* @param[in] desc interface descriptor
*
* @return bInterfaceNumber */
static inline uint8_t _desc_itfnum(void const *desc)
static inline uint8_t _desc_itfnum(uint8_t const *desc)
{
return ((uint8_t const*)desc)[2];
return desc[2];
}
/** Get endpoint address from the endpoint descriptor
@ -118,9 +118,9 @@ static inline uint8_t _desc_itfnum(void const *desc)
* @param[in] desc endpoint descriptor
*
* @return bEndpointAddress */
static inline uint8_t _desc_ep_addr(void const *desc)
static inline uint8_t _desc_ep_addr(uint8_t const *desc)
{
return ((uint8_t const*)desc)[2];
return desc[2];
}
/** Get instance of streaming interface
@ -146,7 +146,7 @@ static tusb_desc_vc_itf_t const* _get_desc_vc(videod_interface_t const *self)
static tusb_desc_vs_itf_t const* _get_desc_vs(videod_streaming_interface_t const *self)
{
if (!self->desc.cur) return NULL;
void const *desc = _videod_itf[self->index_vc].beg;
uint8_t const *desc = _videod_itf[self->index_vc].beg;
return (tusb_desc_vs_itf_t const*)(desc + self->desc.cur);
}
@ -158,9 +158,9 @@ static tusb_desc_vs_itf_t const* _get_desc_vs(videod_streaming_interface_t const
*
* @return The pointer for interface descriptor.
* @retval end did not found interface descriptor */
static void const* _find_desc(void const *beg, void const *end, uint_fast8_t desc_type)
static uint8_t const* _find_desc(uint8_t const *beg, uint8_t const *end, uint_fast8_t desc_type)
{
void const *cur = beg;
uint8_t const *cur = beg;
while ((cur < end) && (desc_type != tu_desc_type(cur))) {
cur = tu_desc_next(cur);
}
@ -177,14 +177,13 @@ static void const* _find_desc(void const *beg, void const *end, uint_fast8_t des
*
* @return The pointer for interface descriptor.
* @retval end did not found interface descriptor */
static void const* _find_desc_3(void const *beg, void const *end,
static uint8_t const* _find_desc_3(uint8_t const *beg, uint8_t const *end,
uint_fast8_t desc_type,
uint_fast8_t element_0,
uint_fast8_t element_1)
{
for (void const *cur = beg; cur < end; cur = _find_desc(cur, end, desc_type)) {
uint8_t const *p = (uint8_t const *)cur;
if ((p[2] == element_0) && (p[3] == element_1)) {
for (uint8_t const *cur = beg; cur < end; cur = _find_desc(cur, end, desc_type)) {
if ((cur[2] == element_0) && (cur[3] == element_1)) {
return cur;
}
cur = tu_desc_next(cur);
@ -199,9 +198,9 @@ static void const* _find_desc_3(void const *beg, void const *end,
*
* @return The pointer for interface descriptor.
* @retval end did not found interface descriptor */
static void const* _next_desc_itf(void const *beg, void const *end)
static uint8_t const* _next_desc_itf(void const *beg, uint8_t const *end)
{
void const *cur = beg;
uint8_t const *cur = beg;
uint_fast8_t itfnum = ((tusb_desc_interface_t const*)cur)->bInterfaceNumber;
while ((cur < end) &&
(itfnum == ((tusb_desc_interface_t const*)cur)->bInterfaceNumber)) {
@ -219,7 +218,7 @@ static void const* _next_desc_itf(void const *beg, void const *end)
*
* @return The pointer for interface descriptor.
* @retval end did not found interface descriptor */
static inline void const* _find_desc_itf(void const *beg, void const *end, uint_fast8_t itfnum, uint_fast8_t altnum)
static inline uint8_t const* _find_desc_itf(uint8_t const *beg, uint8_t const *end, uint_fast8_t itfnum, uint_fast8_t altnum)
{
return _find_desc_3(beg, end, TUSB_DESC_INTERFACE, itfnum, altnum);
}
@ -233,9 +232,9 @@ static inline void const* _find_desc_itf(void const *beg, void const *end, uint_
*
* @return The pointer for endpoint descriptor.
* @retval end did not found endpoint descriptor */
static void const* _find_desc_ep(void const *beg, void const *end)
static uint8_t const* _find_desc_ep(uint8_t const *beg, uint8_t const *end)
{
for (void const *cur = beg; cur < end; cur = tu_desc_next(cur)) {
for (uint8_t const *cur = beg; cur < end; cur = tu_desc_next(cur)) {
uint_fast8_t desc_type = tu_desc_type(cur);
if (TUSB_DESC_ENDPOINT == desc_type) return cur;
if (TUSB_DESC_INTERFACE == desc_type) break;
@ -251,17 +250,17 @@ static void const* _find_desc_ep(void const *beg, void const *end)
*
* @return The pointer for interface descriptor.
* @retval end did not found interface descriptor */
static void const* _find_desc_entity(void const *desc, uint_fast8_t entityid)
static uint8_t const* _find_desc_entity(void const *desc, uint_fast8_t entityid)
{
tusb_desc_vc_itf_t const *vc = (tusb_desc_vc_itf_t const*)desc;
void const *beg = vc;
void const *end = beg + vc->std.bLength + vc->ctl.wTotalLength;
for (void const *cur = beg; cur < end; cur = _find_desc(cur, end, TUSB_DESC_CS_INTERFACE)) {
uint8_t const *beg = desc;
uint8_t const *end = beg + vc->std.bLength + vc->ctl.wTotalLength;
for (uint8_t const *cur = beg; cur < end; cur = _find_desc(cur, end, TUSB_DESC_CS_INTERFACE)) {
tusb_desc_cs_video_entity_itf_t const *itf = (tusb_desc_cs_video_entity_itf_t const *)cur;
if ((VIDEO_CS_ITF_VC_INPUT_TERMINAL <= itf->bDescriptorSubtype
&& itf->bDescriptorSubtype < VIDEO_CS_ITF_VC_MAX)
&& itf->bEntityId == entityid) {
return itf;
return cur;
}
cur = tu_desc_next(cur);
}
@ -272,18 +271,18 @@ static void const* _find_desc_entity(void const *desc, uint_fast8_t entityid)
static inline void const* _end_of_streaming_descriptor(void const *desc)
{
tusb_desc_vs_itf_t const *vs = (tusb_desc_vs_itf_t const *)desc;
return desc + vs->std.bLength + vs->stm.wTotalLength;
return (uint8_t const *)desc + vs->std.bLength + vs->stm.wTotalLength;
}
/** Find the first format descriptor with the specified format number. */
static inline tusb_desc_cs_video_fmt_uncompressed_t const *_find_desc_format(void const *beg, void const *end, uint_fast8_t fmtnum)
static inline tusb_desc_cs_video_fmt_uncompressed_t const *_find_desc_format(uint8_t const *beg, uint8_t const *end, uint_fast8_t fmtnum)
{
return (tusb_desc_cs_video_fmt_uncompressed_t const*)
_find_desc_3(beg, end, TUSB_DESC_CS_INTERFACE, VIDEO_CS_ITF_VS_FORMAT_UNCOMPRESSED, fmtnum);
}
/** Find the first frame descriptor with the specified format number. */
static inline tusb_desc_cs_video_frm_uncompressed_t const *_find_desc_frame(void const *beg, void const *end, uint_fast8_t frmnum)
static inline tusb_desc_cs_video_frm_uncompressed_t const *_find_desc_frame(uint8_t const *beg, uint8_t const *end, uint_fast8_t frmnum)
{
return (tusb_desc_cs_video_frm_uncompressed_t const*)
_find_desc_3(beg, end, TUSB_DESC_CS_INTERFACE, VIDEO_CS_ITF_VS_FRAME_UNCOMPRESSED, frmnum);
@ -485,9 +484,9 @@ static bool _close_vc_itf(uint8_t rhport, videod_interface_t *self)
{
tusb_desc_vc_itf_t const *vc = _get_desc_vc(self);
/* The next descriptor after the class-specific VC interface header descriptor. */
void const *cur = (void const*)vc + vc->std.bLength + vc->ctl.bLength;
uint8_t const *cur = (uint8_t const*)vc + vc->std.bLength + vc->ctl.bLength;
/* The end of the video control interface descriptor. */
void const *end = (void const*)vc + vc->std.bLength + vc->ctl.wTotalLength;
uint8_t const *end = (uint8_t const*)vc + vc->std.bLength + vc->ctl.wTotalLength;
if (vc->std.bNumEndpoints) {
/* Find the notification endpoint descriptor. */
cur = _find_desc(cur, end, TUSB_DESC_ENDPOINT);
@ -506,10 +505,10 @@ static bool _close_vc_itf(uint8_t rhport, videod_interface_t *self)
static bool _open_vc_itf(uint8_t rhport, videod_interface_t *self, uint_fast8_t altnum)
{
TU_LOG2(" open VC %d\n", altnum);
void const *beg = self->beg;
void const *end = beg + self->len;
uint8_t const *beg = self->beg;
uint8_t const *end = beg + self->len;
/* The first descriptor is a video control interface descriptor. */
void const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum);
uint8_t const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum);
TU_LOG2(" cur %d\n", cur - beg);
TU_VERIFY(cur < end);
@ -534,7 +533,7 @@ static bool _open_vc_itf(uint8_t rhport, videod_interface_t *self, uint_fast8_t
/* Open the notification endpoint */
TU_ASSERT(usbd_edpt_open(rhport, notif));
}
self->cur = (uint16_t) ((void const*)vc - beg);
self->cur = (uint16_t) ((uint8_t const*)vc - beg);
return true;
}
@ -546,7 +545,7 @@ static bool _open_vs_itf(uint8_t rhport, videod_streaming_interface_t *stm, uint
{
uint_fast8_t i;
TU_LOG2(" reopen VS %d\n", altnum);
void const *desc = _videod_itf[stm->index_vc].beg;
uint8_t const *desc = _videod_itf[stm->index_vc].beg;
/* Close endpoints of previous settings. */
for (i = 0; i < TU_ARRAY_SIZE(stm->desc.ep); ++i) {
@ -563,9 +562,9 @@ static bool _open_vs_itf(uint8_t rhport, videod_streaming_interface_t *stm, uint
stm->offset = 0;
/* Find a alternate interface */
void const *beg = desc + stm->desc.beg;
void const *end = desc + stm->desc.end;
void const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum);
uint8_t const *beg = desc + stm->desc.beg;
uint8_t const *end = desc + stm->desc.end;
uint8_t const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum);
TU_VERIFY(cur < end);
uint_fast8_t numeps = ((tusb_desc_interface_t const *)cur)->bNumEndpoints;
TU_ASSERT(numeps <= TU_ARRAY_SIZE(stm->desc.ep));
@ -977,7 +976,7 @@ bool tud_video_n_frame_xfer(uint_fast8_t ctl_idx, uint_fast8_t stm_idx, void *bu
if (!stm || !stm->desc.ep[0] || stm->buffer) return false;
/* Find EP address */
void const *desc = _videod_itf[stm->index_vc].beg;
uint8_t const *desc = _videod_itf[stm->index_vc].beg;
uint8_t ep_addr = 0;
for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO_STREAMING; ++i) {
uint_fast16_t ofs_ep = stm->desc.ep[i];
@ -1044,15 +1043,15 @@ uint16_t videod_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uin
}
TU_ASSERT(ctl_idx < CFG_TUD_VIDEO, 0);
void const *end = (void const*)itf_desc + max_len;
self->beg = itf_desc;
uint8_t const *end = (uint8_t const*)itf_desc + max_len;
self->beg = (uint8_t const *)itf_desc;
self->len = max_len;
/*------------- Video Control Interface -------------*/
TU_VERIFY(_open_vc_itf(rhport, self, 0), 0);
tusb_desc_vc_itf_t const *vc = _get_desc_vc(self);
uint_fast8_t bInCollection = vc->ctl.bInCollection;
/* Find the end of the video interface descriptor */
void const *cur = _next_desc_itf(itf_desc, end);
uint8_t const *cur = _next_desc_itf(itf_desc, end);
for (uint8_t stm_idx = 0; stm_idx < bInCollection; ++stm_idx) {
videod_streaming_interface_t *stm = NULL;
/* find free streaming interface handle */
@ -1085,7 +1084,7 @@ bool videod_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_
/* Identify which control interface to use */
uint_fast8_t itf;
for (itf = 0; itf < CFG_TUD_VIDEO; ++itf) {
void const *desc = _videod_itf[itf].beg;
uint8_t const *desc = _videod_itf[itf].beg;
if (!desc) continue;
if (itfnum == _desc_itfnum(desc)) break;
}
@ -1101,7 +1100,7 @@ bool videod_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_
for (itf = 0; itf < CFG_TUD_VIDEO_STREAMING; ++itf) {
videod_streaming_interface_t *stm = &_videod_streaming_itf[itf];
if (!stm->desc.beg) continue;
void const *desc = _videod_itf[stm->index_vc].beg;
uint8_t const *desc = _videod_itf[stm->index_vc].beg;
if (itfnum == _desc_itfnum(desc + stm->desc.beg)) break;
}
@ -1127,7 +1126,7 @@ bool videod_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint3
uint_fast16_t const ep_ofs = stm->desc.ep[0];
if (!ep_ofs) continue;
ctl = &_videod_itf[stm->index_vc];
void const *desc = ctl->beg;
uint8_t const *desc = ctl->beg;
if (ep_addr == _desc_ep_addr(desc + ep_ofs)) break;
}