/* See LICENSE file for copyright and license details. */
#include "libcoopgamma.h"
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if !defined(COOPGAMMAD)
# define COOPGAMMAD "coopgammad"
#endif
#if defined(__clang__)
# pragma GCC diagnostic ignored "-Wdocumentation"
# pragma GCC diagnostic ignored "-Wcovered-switch-default"
# pragma GCC diagnostic ignored "-Wcast-align"
#endif
#if defined(__GNUC__)
# define NAME_OF_THE_PROCESS (argv0)
extern const char *argv0;
const char *argv0 __attribute__((weak)) = "libcoopgamma";
#else
# define NAME_OF_THE_PROCESS ("libcoopgamma")
#endif
#define SUBBUF\
(buf ? &buf[off] : NULL)
#define NNSUBBUF\
(buf + off)
#define MARSHAL_PROLOGUE\
char *restrict buf = vbuf;\
size_t off = 0;
#define UNMARSHAL_PROLOGUE\
const char *restrict buf = vbuf;\
size_t off = 0;
#define MARSHAL_EPILOGUE\
return off
#define UNMARSHAL_EPILOGUE\
return *np = off, LIBCOOPGAMMA_SUCCESS
#define marshal_prim(datum, type)\
((buf != NULL ? *(type *)&buf[off] = (datum) : 0), off += sizeof(type))
#define unmarshal_prim(datum, type)\
((datum) = *(const type *)&buf[off], off += sizeof(type))
#define marshal_version(version)\
marshal_prim(version, int)
#define unmarshal_version(version)\
do {\
int version__;\
unmarshal_prim(version__, int);\
if (version__ < (version))\
return LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE;\
if (version__ > (version))\
return LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE;\
} while (0)
#define marshal_buffer(data, n)\
((buf ? (memcpy(buf + off, (data), (n)), 0) : 0), off += (n))
#define unmarshal_buffer(data, n)\
do {\
(data) = malloc(n);\
if (!(data))\
return LIBCOOPGAMMA_ERRNO_SET;\
memcpy((data), &buf[off], (n));\
off += (n);\
} while (0)
#define marshal_string(datum)\
(!(datum) ? marshal_prim(0, char) :\
(marshal_prim(1, char), marshal_buffer((datum), strlen(datum) + 1)))
#define unmarshal_string(datum)\
do {\
char nonnull__;\
unmarshal_prim(nonnull__, char);\
if (nonnull__)\
unmarshal_buffer((datum), strlen(buf + off) + 1);\
else\
(datum) = NULL;\
} while (0)
#define copy_errno(ctx)\
(!errno ? NULL :\
((ctx)->error.number = (uint64_t)errno,\
(ctx)->error.custom = 0,\
(ctx)->error.server_side = 0,\
free((ctx)->error.description),\
(ctx)->error.description = NULL))
#define SYNC_CALL(send_call, recv_call, fail_return)\
libcoopgamma_async_context_t async;\
if (send_call < 0) {\
reflush:\
if (errno != EINTR)\
return fail_return;\
if (libcoopgamma_flush(ctx) < 0)\
goto reflush;\
}\
resync:\
if (libcoopgamma_synchronise(ctx, &async, (size_t)1, &(size_t){0}) < 0) {\
if (errno != EINTR && errno)\
return fail_return;\
goto resync;\
}\
return recv_call
#define INTEGRAL_DEPTHS\
case LIBCOOPGAMMA_UINT8:\
case LIBCOOPGAMMA_UINT16:\
case LIBCOOPGAMMA_UINT32:\
case LIBCOOPGAMMA_UINT64:
/**
* Initialise a `libcoopgamma_ramps8_t`, `libcoopgamma_ramps16_t`, `libcoopgamma_ramps32_t`,
* `libcoopgamma_ramps64_t`, `libcoopgamma_rampsf_t`, or `libcoopgamma_rampsd_t`
*
* `this->red_size`, `this->green_size`, and `this->blue_size` must already be set
*
* @param this The record to initialise
* @param width The `sizeof(*(this->red))`
* @return Zero on success, -1 on error
*/
int
libcoopgamma_ramps_initialise_(void *restrict this, size_t width)
{
libcoopgamma_ramps8_t *restrict this8 = (libcoopgamma_ramps8_t *restrict)this;
this8->red = this8->green = this8->blue = NULL;
this8->red = malloc((this8->red_size + this8->green_size + this8->blue_size) * width);
if (!this8->red)
return -1;
this8->green = this8->red + this8->red_size * width;
this8->blue = this8->green + this8->green_size * width;
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_ramps8_t`, `libcoopgamma_ramps16_t`,
* `libcoopgamma_ramps32_t`, `libcoopgamma_ramps64_t`, `libcoopgamma_rampsf_t`,
* `libcoopgamma_rampsd_t`, or `libcoopgamma_ramps_t`, the allocation of the record
* itself is not freed
*
* Always call this function after failed call to `libcoopgamma_ramps_initialise`
* or failed call to `libcoopgamma_ramps_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_ramps_destroy(void *restrict this)
{
libcoopgamma_ramps8_t *restrict this8 = (libcoopgamma_ramps8_t *restrict)this;
free(this8->red);
this8->red = this8->green = this8->blue = NULL;
}
/**
* Marshal a `libcoopgamma_ramps8_t`, `libcoopgamma_ramps16_t`, `libcoopgamma_ramps32_t`,
* `libcoopgamma_ramps64_t`, `libcoopgamma_rampsf_t`, or `libcoopgamma_rampsd_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @param width The `sizeof(*(this->red))`
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_ramps_marshal_(const void *restrict this, void *restrict vbuf, size_t width)
{
const libcoopgamma_ramps8_t *restrict this8 = (const libcoopgamma_ramps8_t *restrict)this;
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_RAMPS_VERSION);
marshal_prim(this8->red_size, size_t);
marshal_prim(this8->green_size, size_t);
marshal_prim(this8->blue_size, size_t);
marshal_buffer(this8->red, (this8->red_size + this8->green_size + this8->blue_size) * width);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_ramps8_t`, `libcoopgamma_ramps16_t`, `libcoopgamma_ramps32_t`,
* `libcoopgamma_ramps64_t`, `libcoopgamma_rampsf_t`, or `libcoopgamma_rampsd_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @param width The `sizeof(*(this->red))`
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_ramps_unmarshal_(void *restrict this, const void *restrict vbuf,
size_t *restrict np, size_t width)
{
libcoopgamma_ramps8_t *restrict this8 = (libcoopgamma_ramps8_t *restrict)this;
UNMARSHAL_PROLOGUE;
unmarshal_version(LIBCOOPGAMMA_RAMPS_VERSION);
unmarshal_prim(this8->red_size, size_t);
unmarshal_prim(this8->green_size, size_t);
unmarshal_prim(this8->blue_size, size_t);
unmarshal_buffer(this8->red, (this8->red_size + this8->green_size + this8->blue_size) * width);
this8->green = this8->red + this8->red_size * width;
this8->blue = this8->green + this8->green_size * width;
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_filter_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_filter_initialise(libcoopgamma_filter_t *restrict this)
{
memset(this, 0, sizeof(*this));
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_filter_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_filter_initialise`
* or failed call to `libcoopgamma_filter_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_filter_destroy(libcoopgamma_filter_t *restrict this)
{
free(this->crtc);
free(this->class);
free(this->ramps.u8.red);
memset(this, 0, sizeof(*this));
}
/**
* Marshal a `libcoopgamma_filter_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_filter_marshal(const libcoopgamma_filter_t *restrict this, void *restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_FILTER_VERSION);
marshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
marshal_version(LIBCOOPGAMMA_LIFESPAN_VERSION);
marshal_prim(this->depth, libcoopgamma_depth_t);
marshal_prim(this->priority, int64_t);
marshal_string(this->crtc);
marshal_string(this->class);
marshal_prim(this->lifespan, libcoopgamma_lifespan_t);
switch (this->depth) {
case LIBCOOPGAMMA_UINT8: off += libcoopgamma_ramps_marshal(&this->ramps.u8, SUBBUF); break;
case LIBCOOPGAMMA_UINT16: off += libcoopgamma_ramps_marshal(&this->ramps.u16, SUBBUF); break;
case LIBCOOPGAMMA_UINT32: off += libcoopgamma_ramps_marshal(&this->ramps.u32, SUBBUF); break;
case LIBCOOPGAMMA_UINT64: off += libcoopgamma_ramps_marshal(&this->ramps.u64, SUBBUF); break;
case LIBCOOPGAMMA_FLOAT: off += libcoopgamma_ramps_marshal(&this->ramps.f, SUBBUF); break;
case LIBCOOPGAMMA_DOUBLE: off += libcoopgamma_ramps_marshal(&this->ramps.d, SUBBUF); break;
default:
break;
}
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_filter_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_filter_unmarshal(libcoopgamma_filter_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
int r = LIBCOOPGAMMA_SUCCESS;
size_t n = 0;
UNMARSHAL_PROLOGUE;
memset(this, 0, sizeof(*this));
unmarshal_version(LIBCOOPGAMMA_FILTER_VERSION);
unmarshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
unmarshal_version(LIBCOOPGAMMA_LIFESPAN_VERSION);
unmarshal_prim(this->depth, libcoopgamma_depth_t);
unmarshal_prim(this->priority, int64_t);
unmarshal_string(this->crtc);
unmarshal_string(this->class);
unmarshal_prim(this->lifespan, libcoopgamma_lifespan_t);
switch (this->depth) {
case LIBCOOPGAMMA_UINT8: r = libcoopgamma_ramps_unmarshal(&(this->ramps.u8), NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT16: r = libcoopgamma_ramps_unmarshal(&(this->ramps.u16), NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT32: r = libcoopgamma_ramps_unmarshal(&(this->ramps.u32), NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT64: r = libcoopgamma_ramps_unmarshal(&(this->ramps.u64), NNSUBBUF, &n); break;
case LIBCOOPGAMMA_FLOAT: r = libcoopgamma_ramps_unmarshal(&(this->ramps.f), NNSUBBUF, &n); break;
case LIBCOOPGAMMA_DOUBLE: r = libcoopgamma_ramps_unmarshal(&(this->ramps.d), NNSUBBUF, &n); break;
default:
break;
}
if (r != LIBCOOPGAMMA_SUCCESS)
return r;
off += n;
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_crtc_info_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_crtc_info_initialise(libcoopgamma_crtc_info_t *restrict this)
{
memset(this, 0, sizeof(*this));
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_crtc_info_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_crtc_info_initialise`
* or failed call to `libcoopgamma_crtc_info_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_crtc_info_destroy(libcoopgamma_crtc_info_t *restrict this)
{
(void) this;
}
/**
* Marshal a `libcoopgamma_crtc_info_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_crtc_info_marshal(const libcoopgamma_crtc_info_t *restrict this, void *restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_CRTC_INFO_VERSION);
marshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
marshal_version(LIBCOOPGAMMA_SUPPORT_VERSION);
marshal_version(LIBCOOPGAMMA_COLOURSPACE_VERSION);
marshal_prim(this->cooperative, int);
marshal_prim(this->depth, libcoopgamma_depth_t);
marshal_prim(this->red_size, size_t);
marshal_prim(this->green_size, size_t);
marshal_prim(this->blue_size, size_t);
marshal_prim(this->supported, libcoopgamma_support_t);
marshal_prim(this->colourspace, libcoopgamma_colourspace_t);
marshal_prim(this->have_gamut, int);
marshal_prim(this->red_x, unsigned);
marshal_prim(this->red_y, unsigned);
marshal_prim(this->green_x, unsigned);
marshal_prim(this->green_y, unsigned);
marshal_prim(this->blue_x, unsigned);
marshal_prim(this->blue_y, unsigned);
marshal_prim(this->white_x, unsigned);
marshal_prim(this->white_y, unsigned);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_crtc_info_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_crtc_info_unmarshal(libcoopgamma_crtc_info_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
UNMARSHAL_PROLOGUE;
unmarshal_version(LIBCOOPGAMMA_CRTC_INFO_VERSION);
unmarshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
unmarshal_version(LIBCOOPGAMMA_SUPPORT_VERSION);
unmarshal_version(LIBCOOPGAMMA_COLOURSPACE_VERSION);
unmarshal_prim(this->cooperative, int);
unmarshal_prim(this->depth, libcoopgamma_depth_t);
unmarshal_prim(this->red_size, size_t);
unmarshal_prim(this->green_size, size_t);
unmarshal_prim(this->blue_size, size_t);
unmarshal_prim(this->supported, libcoopgamma_support_t);
unmarshal_prim(this->colourspace, libcoopgamma_colourspace_t);
unmarshal_prim(this->have_gamut, int);
unmarshal_prim(this->red_x, unsigned);
unmarshal_prim(this->red_y, unsigned);
unmarshal_prim(this->green_x, unsigned);
unmarshal_prim(this->green_y, unsigned);
unmarshal_prim(this->blue_x, unsigned);
unmarshal_prim(this->blue_y, unsigned);
unmarshal_prim(this->white_x, unsigned);
unmarshal_prim(this->white_y, unsigned);
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_filter_query_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_filter_query_initialise(libcoopgamma_filter_query_t *restrict this)
{
this->crtc = NULL;
this->coalesce = 0;
this->high_priority = INT64_MAX;
this->low_priority = INT64_MIN;
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_filter_query_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_filter_query_initialise`
* or failed call to `libcoopgamma_filter_query_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_filter_query_destroy(libcoopgamma_filter_query_t *restrict this)
{
free(this->crtc);
this->crtc = NULL;
}
/**
* Marshal a `libcoopgamma_filter_query_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_filter_query_marshal(const libcoopgamma_filter_query_t *restrict this, void* restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_FILTER_QUERY_VERSION);
marshal_string(this->crtc);
marshal_prim(this->coalesce, int);
marshal_prim(this->high_priority, int64_t);
marshal_prim(this->low_priority, int64_t);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_filter_query_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_filter_query_unmarshal(libcoopgamma_filter_query_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
UNMARSHAL_PROLOGUE;
this->crtc = NULL;
unmarshal_version(LIBCOOPGAMMA_FILTER_QUERY_VERSION);
unmarshal_string(this->crtc);
unmarshal_prim(this->coalesce, int);
unmarshal_prim(this->high_priority, int64_t);
unmarshal_prim(this->low_priority, int64_t);
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_queried_filter_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_queried_filter_initialise(libcoopgamma_queried_filter_t *restrict this)
{
memset(this, 0, sizeof(*this));
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_queried_filter_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_queried_filter_initialise`
* or failed call to `libcoopgamma_queried_filter_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_queried_filter_destroy(libcoopgamma_queried_filter_t *restrict this)
{
free(this->class);
this->class = NULL;
libcoopgamma_ramps_destroy(&this->ramps.u8);
}
/**
* Marshal a `libcoopgamma_queried_filter_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @param depth The type used of ramp stops
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_queried_filter_marshal(const libcoopgamma_queried_filter_t *restrict this,
void *restrict vbuf, libcoopgamma_depth_t depth)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_QUERIED_FILTER_VERSION);
marshal_prim(this->priority, int64_t);
marshal_string(this->class);
switch (depth) {
case LIBCOOPGAMMA_UINT8: off += libcoopgamma_ramps_marshal(&this->ramps.u8, SUBBUF); break;
case LIBCOOPGAMMA_UINT16: off += libcoopgamma_ramps_marshal(&this->ramps.u16, SUBBUF); break;
case LIBCOOPGAMMA_UINT32: off += libcoopgamma_ramps_marshal(&this->ramps.u32, SUBBUF); break;
case LIBCOOPGAMMA_UINT64: off += libcoopgamma_ramps_marshal(&this->ramps.u64, SUBBUF); break;
case LIBCOOPGAMMA_FLOAT: off += libcoopgamma_ramps_marshal(&this->ramps.f, SUBBUF); break;
case LIBCOOPGAMMA_DOUBLE: off += libcoopgamma_ramps_marshal(&this->ramps.d, SUBBUF); break;
default:
break;
}
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_queried_filter_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @param depth The type used of ramp stops
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int libcoopgamma_queried_filter_unmarshal(libcoopgamma_queried_filter_t *restrict this, const void *restrict vbuf,
size_t *restrict np, libcoopgamma_depth_t depth)
{
int r = LIBCOOPGAMMA_SUCCESS;
size_t n = 0;
UNMARSHAL_PROLOGUE;
memset(this, 0, sizeof(*this));
unmarshal_version(LIBCOOPGAMMA_QUERIED_FILTER_VERSION);
unmarshal_prim(this->priority, int64_t);
unmarshal_string(this->class);
switch (depth) {
case LIBCOOPGAMMA_UINT8: r = libcoopgamma_ramps_unmarshal(&this->ramps.u8, NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT16: r = libcoopgamma_ramps_unmarshal(&this->ramps.u16, NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT32: r = libcoopgamma_ramps_unmarshal(&this->ramps.u32, NNSUBBUF, &n); break;
case LIBCOOPGAMMA_UINT64: r = libcoopgamma_ramps_unmarshal(&this->ramps.u64, NNSUBBUF, &n); break;
case LIBCOOPGAMMA_FLOAT: r = libcoopgamma_ramps_unmarshal(&this->ramps.f, NNSUBBUF, &n); break;
case LIBCOOPGAMMA_DOUBLE: r = libcoopgamma_ramps_unmarshal(&this->ramps.d, NNSUBBUF, &n); break;
default:
break;
}
if (r != LIBCOOPGAMMA_SUCCESS)
return r;
off += n;
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_filter_table_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_filter_table_initialise(libcoopgamma_filter_table_t *restrict this)
{
memset(this, 0, sizeof(*this));
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_filter_table_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_filter_table_initialise`
* or failed call to `libcoopgamma_filter_table_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_filter_table_destroy(libcoopgamma_filter_table_t *restrict this)
{
while (this->filter_count)
libcoopgamma_queried_filter_destroy(this->filters + --this->filter_count);
free(this->filters);
this->filters = NULL;
}
/**
* Marshal a `libcoopgamma_filter_table_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_filter_table_marshal(const libcoopgamma_filter_table_t *restrict this, void *restrict vbuf)
{
size_t i;
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_FILTER_TABLE_VERSION);
marshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
marshal_prim(this->depth, libcoopgamma_depth_t);
marshal_prim(this->red_size, size_t);
marshal_prim(this->green_size, size_t);
marshal_prim(this->blue_size, size_t);
marshal_prim(this->filter_count, size_t);
for (i = 0; i < this->filter_count; i++)
off += libcoopgamma_queried_filter_marshal(&this->filters[i], SUBBUF, this->depth);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_filter_table_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_filter_table_unmarshal(libcoopgamma_filter_table_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
size_t i, n, fn;
int r;
UNMARSHAL_PROLOGUE;
this->filter_count = 0;
this->filters = NULL;
unmarshal_version(LIBCOOPGAMMA_FILTER_TABLE_VERSION);
unmarshal_version(LIBCOOPGAMMA_DEPTH_VERSION);
unmarshal_prim(this->depth, libcoopgamma_depth_t);
unmarshal_prim(this->red_size, size_t);
unmarshal_prim(this->green_size, size_t);
unmarshal_prim(this->blue_size, size_t);
unmarshal_prim(fn, size_t);
this->filters = malloc(fn * sizeof(*this->filters));
if (!this->filters)
return LIBCOOPGAMMA_ERRNO_SET;
for (i = 0; i < fn; i++) {
r = libcoopgamma_queried_filter_unmarshal(&this->filters[i], NNSUBBUF, &n, this->depth);
if (r != LIBCOOPGAMMA_SUCCESS)
return r;
off += n;
this->filter_count += 1;
}
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_error_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_error_initialise(libcoopgamma_error_t *restrict this)
{
this->number = 0;
this->custom = 0;
this->description = NULL;
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_error_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_error_initialise`
* or failed call to `libcoopgamma_error_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_error_destroy(libcoopgamma_error_t *restrict this)
{
free(this->description);
this->description = NULL;
}
/**
* Marshal a `libcoopgamma_error_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_error_marshal(const libcoopgamma_error_t *restrict this, void *restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_ERROR_VERSION);
marshal_prim(this->number, uint64_t);
marshal_prim(this->custom, int);
marshal_prim(this->server_side, int);
marshal_string(this->description);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_error_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_error_unmarshal(libcoopgamma_error_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
UNMARSHAL_PROLOGUE;
this->description = NULL;
unmarshal_version(LIBCOOPGAMMA_ERROR_VERSION);
unmarshal_prim(this->number, uint64_t);
unmarshal_prim(this->custom, int);
unmarshal_prim(this->server_side, int);
unmarshal_string(this->description);
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_context_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_context_initialise(libcoopgamma_context_t *restrict this)
{
memset(this, 0, sizeof(*this));
this->fd = -1;
this->blocking = 1;
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_context_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_context_initialise`
* or failed call to `libcoopgamma_context_unmarshal`
*
* @param this The record to destroy
* @param disconnect Disconnect from the server?
*/
void
libcoopgamma_context_destroy(libcoopgamma_context_t *restrict this, int disconnect)
{
if (disconnect && this->fd >= 0) {
shutdown(this->fd, SHUT_RDWR);
close(this->fd);
}
this->fd = -1;
libcoopgamma_error_destroy(&this->error);
free(this->outbound);
free(this->inbound);
this->outbound = NULL;
this->inbound = NULL;
}
/**
* Marshal a `libcoopgamma_context_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_context_marshal(const libcoopgamma_context_t *restrict this, void *restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_CONTEXT_VERSION);
marshal_prim(this->fd, int);
off += libcoopgamma_error_marshal(&this->error, SUBBUF);
marshal_prim(this->message_id, uint32_t);
marshal_prim(this->outbound_head - this->outbound_tail, size_t);
marshal_buffer(this->outbound + this->outbound_tail, this->outbound_head - this->outbound_tail);
marshal_prim(this->inbound_head - this->inbound_tail, size_t);
marshal_buffer(this->inbound + this->inbound_tail, this->inbound_head - this->inbound_tail);
marshal_prim(this->length, size_t);
marshal_prim(this->curline, size_t);
marshal_prim(this->in_response_to, uint32_t);
marshal_prim(this->have_all_headers, int);
marshal_prim(this->bad_message, int);
marshal_prim(this->blocking, int);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_context_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_context_unmarshal(libcoopgamma_context_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
size_t n;
int r;
UNMARSHAL_PROLOGUE;
memset(this, 0, sizeof(*this));
unmarshal_version(LIBCOOPGAMMA_CONTEXT_VERSION);
unmarshal_prim(this->fd, int);
r = libcoopgamma_error_unmarshal(&this->error, NNSUBBUF, &n);
if (r != LIBCOOPGAMMA_SUCCESS)
return r;
off += n;
unmarshal_prim(this->message_id, uint32_t);
unmarshal_prim(this->outbound_head, size_t);
this->outbound_size = this->outbound_head;
unmarshal_buffer(this->outbound, this->outbound_head);
unmarshal_prim(this->inbound_head, size_t);
this->inbound_size = this->inbound_head;
unmarshal_buffer(this->inbound, this->inbound_head);
unmarshal_prim(this->length, size_t);
unmarshal_prim(this->curline, size_t);
unmarshal_prim(this->in_response_to, uint32_t);
unmarshal_prim(this->have_all_headers, int);
unmarshal_prim(this->bad_message, int);
unmarshal_prim(this->blocking, int);
UNMARSHAL_EPILOGUE;
}
/**
* Initialise a `libcoopgamma_async_context_t`
*
* @param this The record to initialise
* @return Zero on success, -1 on error
*/
int
libcoopgamma_async_context_initialise(libcoopgamma_async_context_t *restrict this)
{
this->message_id = 0;
this->coalesce = 0;
return 0;
}
/**
* Release all resources allocated to a `libcoopgamma_async_context_t`,
* the allocation of the record itself is not freed
*
* Always call this function after failed call to `libcoopgamma_async_context_initialise`
* or failed call to `libcoopgamma_async_context_unmarshal`
*
* @param this The record to destroy
*/
void
libcoopgamma_async_context_destroy(libcoopgamma_async_context_t *restrict this)
{
(void) this;
}
/**
* Marshal a `libcoopgamma_async_context_t` into a buffer
*
* @param this The record to marshal
* @param vbuf The output buffer, `NULL` to only measure
* how large this buffer has to be
* @return The number of marshalled bytes, or if `buf == NULL`,
* how many bytes would be marshalled if `buf != NULL`
*/
size_t
libcoopgamma_async_context_marshal(const libcoopgamma_async_context_t *restrict this, void *restrict vbuf)
{
MARSHAL_PROLOGUE;
marshal_version(LIBCOOPGAMMA_ASYNC_CONTEXT_VERSION);
marshal_prim(this->message_id, uint32_t);
marshal_prim(this->coalesce, int);
MARSHAL_EPILOGUE;
}
/**
* Unmarshal a `libcoopgamma_async_context_t` from a buffer
*
* @param this The output parameter for unmarshalled record
* @param vbuf The buffer with the marshalled record
* @param np Output parameter for the number of unmarshalled bytes, undefined on failure
* @return `LIBCOOPGAMMA_SUCCESS` (0), `LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE`,
* `LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE`, or `LIBCOOPGAMMA_ERRNO_SET`
*/
int
libcoopgamma_async_context_unmarshal(libcoopgamma_async_context_t *restrict this, const void *restrict vbuf, size_t *restrict np)
{
UNMARSHAL_PROLOGUE;
unmarshal_version(LIBCOOPGAMMA_ASYNC_CONTEXT_VERSION);
unmarshal_prim(this->message_id, uint32_t);
unmarshal_prim(this->coalesce, int);
UNMARSHAL_EPILOGUE;
}
/**
* List all recognised adjustment method
*
* SIGCHLD must not be ignored or blocked
*
* @return A `NULL`-terminated list of names. You should only free
* the outer pointer, inner pointers are subpointers of the
* outer pointer and cannot be freed. `NULL` on error.
*/
char **
libcoopgamma_get_methods(void)
{
char num[5]; /* The size is base on the fact that we have limited `n` in the loop below */
char **methods = NULL;
char *method;
char **rc;
char *buffer;
int n = 0;
size_t size = 0;
void *new;
methods = malloc(4 * sizeof(*methods));
if (!methods)
goto fail;
for (n = 0; n < 10000 /* just to be safe */; n++) {
if (n >= 4 && (n & -n) == n) {
new = realloc(methods, (size_t)(n << 1) * sizeof(*methods));
if (!new)
goto fail;
methods = new;
}
sprintf(num, "%i", n);
if (libcoopgamma_get_method_and_site(num, NULL, &method, NULL))
goto fail;
if (!strcmp(method, num)) {
free(method);
break;
}
methods[n] = method;
size += strlen(method) + 1;
}
rc = malloc((size_t)(n + 1) * sizeof(char *) + size);
if (!rc)
goto fail;
buffer = ((char *)rc) + (size_t)(n + 1) * sizeof(char *);
rc[n] = NULL;
while (n--) {
rc[n] = buffer;
buffer = stpcpy(buffer, methods[n]) + 1;
free(methods[n]);
}
free(methods);
return rc;
fail:
while (n--)
free(methods[n]);
free(methods);
return NULL;
}
/**
* Run coopgammad with -q or -qq and return the response
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @param arg "-q" or "-qq", which shall be passed to coopgammad?
* @return The output of coopgammad, `NULL` on error. This
* will be NUL-terminated and will not contain any
* other `NUL` bytes.
*/
static char *
libcoopgamma_query(const char *restrict method, const char *restrict site, const char *restrict arg)
{
const char *(args[7]) = {COOPGAMMAD, arg};
size_t i = 2, n = 0, size = 0;
int pipe_rw[2] = { -1, -1 };
pid_t pid;
int saved_errno, status;
char *msg = NULL;
ssize_t got;
void *new;
if (method) args[i++] = "-m", args[i++] = method;
if (site) args[i++] = "-s", args[i++] = site;
args[i] = NULL;
if (pipe(pipe_rw) < 0)
goto fail;
switch ((pid = fork())) {
case -1:
goto fail;
case 0:
/* Child */
close(pipe_rw[0]);
if (pipe_rw[1] != STDOUT_FILENO) {
close(STDOUT_FILENO);
if (dup2(pipe_rw[1], STDOUT_FILENO) < 0)
goto fail_child;
close(pipe_rw[1]);
}
#if defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wcast-qual"
#endif
execvp(COOPGAMMAD, (char* const*)(args));
#if defined(__GNUC__)
# pragma GCC diagnostic pop
#endif
fail_child:
saved_errno = errno;
perror(NAME_OF_THE_PROCESS);
if (write(STDOUT_FILENO, &saved_errno, sizeof(int)) != sizeof(int))
perror(NAME_OF_THE_PROCESS);
exit(1);
default:
/* Parent */
close(pipe_rw[1]), pipe_rw[1] = -1;
for (;;) {
if (n == size) {
new = realloc(msg, size = (n ? (n << 1) : 256));
if (!new)
goto fail;
msg = new;
}
got = read(pipe_rw[0], msg + n, size - n);
if (got < 0) {
if (errno == EINTR)
continue;
goto fail;
} else if (got == 0) {
break;
}
n += (size_t)got;
}
close(pipe_rw[0]), pipe_rw[0] = -1;
if (waitpid(pid, &status, 0) < 0)
goto fail;
if (status) {
errno = EINVAL;
if (n == sizeof(int) && *(int *)msg)
errno = *(int*)msg;
}
break;
}
if (n == size) {
new = realloc(msg, n + 1);
if (!new)
goto fail;
msg = new;
}
msg[n] = '\0';
if (strchr(msg, '\0') != msg + n) {
errno = EBADMSG;
goto fail;
}
return msg;
fail:
saved_errno = errno;
if (pipe_rw[0] >= 0)
close(pipe_rw[0]);
if (pipe_rw[1] >= 0)
close(pipe_rw[1]);
free(msg);
errno = saved_errno;
return NULL;
}
/**
* Get the adjustment method and site
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @param methodp Output pointer for the selected adjustment method,
* which cannot be `NULL`. It is safe to call
* this function with this parameter set to `NULL`.
* @param sitep Output pointer for the selected site, which will
* be `NULL` the method only supports one site or if
* `site == NULL` and no site can be selected
* automatically. It is safe to call this function
* with this parameter set to `NULL`.
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_method_and_site(const char *restrict method, const char *restrict site,
char **restrict methodp, char **restrict sitep)
{
int saved_errno;
char *raw;
char *p;
char *q;
raw = libcoopgamma_query(method, site, "-q");
if (!raw)
return -1;
if (methodp) *methodp = NULL;
if (sitep) *sitep = NULL;
p = strchr(raw, '\n');
if (!p) {
errno = EBADMSG;
goto fail;
}
*p++ = '\0';
if (methodp) {
*methodp = malloc(strlen(raw) + 1);
if (!*methodp)
goto fail;
strcpy(*methodp, raw);
}
if (site && *(q = strchr(p, '\0') - 1)) {
if (*q != '\n') {
errno = EBADMSG;
goto fail;
}
*q = '\0';
*sitep = malloc(strlen(p) + 1);
if (!*sitep)
goto fail;
strcpy(*sitep, p);
}
free(raw);
return 0;
fail:
saved_errno = errno;
if (methodp) {
free(*methodp);
*methodp = NULL;
}
free(raw);
errno = saved_errno;
return -1;
}
/**
* Get the PID file of the coopgamma server
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @return The pathname of the server's PID file, `NULL` on error
* or if there server does not use PID files. The later
* case is detected by checking that `errno` is set to 0.
*/
char *
libcoopgamma_get_pid_file(const char *restrict method, const char *restrict site)
{
char *path;
size_t n;
path = libcoopgamma_get_socket_file(method, site);
if (!path)
return NULL;
n = strlen(path);
if (n < 7 || strcmp(path + n - 7, ".socket")) {
free(path);
errno = EBADMSG;
return NULL;
}
strcpy(path + n - 7, ".pid");
return path;
}
/**
* Get the socket file of the coopgamma server
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @return The pathname of the server's socket, `NULL` on error
* or if there server does have its own socket. The later
* case is detected by checking that `errno` is set to 0,
* and is the case when communicating with a server in a
* multi-server display server like mds.
*/
char *
libcoopgamma_get_socket_file(const char *restrict method, const char *restrict site)
{
char *raw;
char *p;
raw = libcoopgamma_query(method, site, "-qq");
if (!raw)
return NULL;
p = strchr(raw, '\0') - 1;
if (p < raw || *p != '\n') {
errno = EBADMSG;
goto fail;
}
*p = '\0';
if (!*raw) {
errno = EBADMSG;
goto fail;
}
return raw;
fail:
free(raw);
return NULL;
}
/**
* Connect to a coopgamma server, and start it if necessary
*
* Use `libcoopgamma_context_destroy` to disconnect
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @param ctx The state of the library, must be initialised
* @return Zero on success, -1 on error. On error, `errno` is set
* to 0 if the server could not be initialised.
*/
int
libcoopgamma_connect(const char *restrict method, const char *restrict site, libcoopgamma_context_t *restrict ctx)
{
const char *(args[6]) = {COOPGAMMAD};
struct sockaddr_un address;
char* path;
int saved_errno;
int tries = 0, status;
pid_t pid;
size_t i = 1;
ctx->blocking = 1;
if (method) args[i++] = "-m", args[i++] = method;
if (site) args[i++] = "-s", args[i++] = site;
args[i] = NULL;
path = libcoopgamma_get_socket_file(method, site);
if (!path)
return -1;
if (strlen(path) >= sizeof(address.sun_path)) {
free(path);
errno = ENAMETOOLONG;
return -1;
}
address.sun_family = AF_UNIX;
strcpy(address.sun_path, path);
free(path);
if ((ctx->fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
return -1;
retry:
if (connect(ctx->fd, (struct sockaddr *)&address, (socklen_t)sizeof(address)) < 0) {
if ((errno == ECONNREFUSED || errno == ENOENT || errno == ENOTDIR) && !tries++) {
switch ((pid = fork())) {
case -1:
goto fail;
case 0:
/* Child */
close(ctx->fd);
#if defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wcast-qual"
#endif
execvp(COOPGAMMAD, (char *const *)(args));
#if defined(__GNUC__)
# pragma GCC diagnostic pop
#endif
perror(NAME_OF_THE_PROCESS);
exit(1);
default:
/* Parent */
if (waitpid(pid, &status, 0) < 0)
goto fail;
if (status) {
errno = 0;
goto fail;
}
break;
}
goto retry;
}
goto fail;
}
return 0;
fail:
saved_errno = errno;
close(ctx->fd);
ctx->fd = -1;
errno = saved_errno;
return -1;
}
/**
* By default communication is blocking, this function
* can be used to switch between blocking and nonblocking
*
* After setting the communication to nonblocking,
* `libcoopgamma_flush`, `libcoopgamma_synchronise` and
* and request-sending functions can fail with EAGAIN and
* EWOULDBLOCK. It is safe to continue with `libcoopgamma_flush`
* (for `libcoopgamma_flush` it selfand equest-sending functions)
* or `libcoopgamma_synchronise` just like EINTR failure.
*
* @param ctx The state of the library, must be connected
* @param nonblocking Nonblocking mode?
* @return Zero on success, -1 on error
*/
int
libcoopgamma_set_nonblocking(libcoopgamma_context_t *restrict ctx, int nonblocking)
{
int flags = fcntl(ctx->fd, F_GETFL);
if (flags == -1)
return -1;
if (nonblocking)
flags |= O_NONBLOCK;
else
flags &= ~O_NONBLOCK;
if (fcntl(ctx->fd, F_SETFL, flags) == -1)
return -1;
ctx->blocking = !nonblocking;
return 0;
}
/**
* Send all pending outbound data
*
* If this function or another function that sends a request
* to the server fails with EINTR, call this function to
* complete the transfer. The `async` parameter will always
* be in a properly configured state if a function fails
* with EINTR.
*
* @param ctx The state of the library, must be connected
* @return Zero on success, -1 on error
*/
int
libcoopgamma_flush(libcoopgamma_context_t *restrict ctx)
{
ssize_t sent;
size_t chunksize = ctx->outbound_head - ctx->outbound_tail;
size_t sendsize;
while (ctx->outbound_tail < ctx->outbound_head) {
sendsize = ctx->outbound_head - ctx->outbound_tail;
sendsize = sendsize < chunksize ? sendsize : chunksize;
sent = send(ctx->fd, ctx->outbound + ctx->outbound_tail, sendsize, MSG_NOSIGNAL);
if (sent < 0) {
if (errno == EPIPE)
errno = ECONNRESET;
if (errno != EMSGSIZE)
return -1;
if (!(chunksize >>= 1))
return -1;
continue;
}
#ifdef DEBUG_MODE
fprintf(stderr, "\033[31m");
fwrite(ctx->outbound + ctx->outbound_tail, (size_t)sent, 1, stderr);
fprintf(stderr, "\033[m");
fflush(stderr);
#endif
ctx->outbound_tail += (size_t)sent;
}
return 0;
}
/**
* Wait for the next message to be received
*
* @param ctx The state of the library, must be connected
* @param pending Information for each pending request
* @param n The number of elements in `pending`
* @param selected The index of the element in `pending` which corresponds
* to the first inbound message, note that this only means
* that the message is not for any of the other request,
* if the message is corrupt any of the listed requests can
* be selected even if it is not for any of the requests.
* Functions that parse the message will detect such corruption.
* @return Zero on success, -1 on error. If the the message is ignored,
* which happens if corresponding `libcoopgamma_async_context_t`
* is not listed, -1 is returned and `errno` is set to 0. If -1
* is returned, `errno` is set to `ENOTRECOVERABLE` you have
* received a corrupt message and the context has been tainted
* beyond recover.
*/
int
libcoopgamma_synchronise(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict pending,
size_t n, size_t *restrict selected)
{
char temp[3 * sizeof(size_t) + 1];
ssize_t got;
size_t i;
char *p;
char *line;
char *value;
struct pollfd pollfd;
size_t new_size;
void *new;
if (ctx->inbound_head == ctx->inbound_tail) {
ctx->inbound_head = ctx->inbound_tail = ctx->curline = 0;
} else if (ctx->inbound_tail > 0) {
memmove(ctx->inbound, ctx->inbound + ctx->inbound_tail, ctx->inbound_head -= ctx->inbound_tail);
ctx->curline -= ctx->inbound_tail;
ctx->inbound_tail = 0;
}
pollfd.fd = ctx->fd;
pollfd.events = POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI;
if (ctx->inbound_head)
goto skip_recv;
for (;;) {
if (ctx->inbound_head == ctx->inbound_size) {
new_size = ctx->inbound_size ? (ctx->inbound_size << 1) : 1024;
new = realloc(ctx->inbound, new_size);
if (!new)
return -1;
ctx->inbound = new;
ctx->inbound_size = new_size;
}
if (ctx->blocking) {
pollfd.revents = 0;
if (poll(&pollfd, (nfds_t)1, -1) < 0)
return -1;
}
got = recv(ctx->fd, ctx->inbound + ctx->inbound_head, ctx->inbound_size - ctx->inbound_head, 0);
if (got <= 0) {
if (got == 0)
errno = ECONNRESET;
return -1;
}
#ifdef DEBUG_MODE
fprintf(stderr, "\033[32m");
fwrite(ctx->inbound + ctx->inbound_head, (size_t)got, 1, stderr);
fprintf(stderr, "\033[m");
fflush(stderr);
#endif
ctx->inbound_head += (size_t)got;
skip_recv:
while (!ctx->have_all_headers) {
line = ctx->inbound + ctx->curline;
p = memchr(line, '\n', ctx->inbound_head - ctx->curline);
if (!p)
break;
if (memchr(line, '\0', (size_t)(p - line)) != NULL)
ctx->bad_message = 1;
*p++ = '\0';
ctx->curline = (size_t)(p - ctx->inbound);
if (!*line) {
ctx->have_all_headers = 1;
} else if (strstr(line, "In response to: ") == line) {
value = line + (sizeof("In response to: ") - 1);
ctx->in_response_to = (uint32_t)atol(value);
} else if (strstr(line, "Length: ") == line) {
value = line + (sizeof("Length: ") - 1);
ctx->length = (size_t)atol(value);
sprintf(temp, "%zu", ctx->length);
if (strcmp(value, temp))
goto fatal;
}
}
if (ctx->have_all_headers && ctx->inbound_head >= ctx->curline + ctx->length) {
ctx->curline += ctx->length;
if (ctx->bad_message) {
ctx->bad_message = 0;
ctx->have_all_headers = 0;
ctx->length = 0;
ctx->inbound_tail = ctx->curline;
errno = EBADMSG;
return -1;
}
for (i = 0; i < n; i++) {
if (pending[i].message_id == ctx->in_response_to) {
*selected = i;
return 0;
}
}
*selected = 0;
ctx->bad_message = 0;
ctx->have_all_headers = 0;
ctx->length = 0;
ctx->inbound_tail = ctx->curline;
errno = 0;
return -1;
}
}
fatal:
errno = ENOTRECOVERABLE;
return -1;
}
/**
* Send a message to the server and wait for response
*
* @param resp:char** Output parameter for the response,
* will be NUL-terminated
* @param ctx:libcoopgamma_context_t* The state of the library
* @param payload:void* Data to append to the end of the message
* @param payload_size:size_t Byte-size of `payload`
* @param format:string-literal Message formatting string
* @param ... Message formatting arguments
*
* On error, the macro goes to `fail`.
*/
#define SEND_MESSAGE(ctx, payload, payload_size, format, ...)\
do {\
ssize_t n__;\
char *msg__;\
snprintf(NULL, (size_t)0, format "%zn", __VA_ARGS__, &n__);\
msg__ = malloc((size_t)n__ + (payload_size) + (size_t)1);\
if (!msg__)\
goto fail;\
sprintf(msg__, format, __VA_ARGS__);\
if (payload)\
memcpy(msg__ + n__, (payload), (payload_size));\
if (send_message((ctx), msg__, (size_t)n__ + (payload_size)) < 0)\
goto fail;\
} while (0)
/**
* Send a message to the server and wait for response
*
* @param ctx The state of the library
* @param msg The message to send
* @param n The length of `msg`
* @return Zero on success, -1 on error
*/
static int
send_message(libcoopgamma_context_t *restrict ctx, char *msg, size_t n)
{
void *new;
if (ctx->outbound_head == ctx->outbound_tail) {
free(ctx->outbound);
ctx->outbound = msg;
ctx->outbound_tail = 0;
ctx->outbound_head = n;
ctx->outbound_size = n;
} else {
if (ctx->outbound_head + n > ctx->outbound_size) {
memmove(ctx->outbound, ctx->outbound + ctx->outbound_tail, ctx->outbound_head -= ctx->outbound_tail);
ctx->outbound_tail = 0;
}
if (ctx->outbound_head + n > ctx->outbound_size) {
new = realloc(ctx->outbound, ctx->outbound_head + n);
if (!new) {
free(msg);
return -1;
}
ctx->outbound = new;
ctx->outbound_size = ctx->outbound_head + n;
}
memcpy(ctx->outbound + ctx->outbound_head, msg, n);
ctx->outbound_head += n;
free(msg);
}
ctx->message_id += 1;
return libcoopgamma_flush(ctx);
}
/**
* Get the next header of the inbound message
*
* All headers must be read before the payload is read
*
* @param ctx The state of the library, must be connected
* @return The next header line, can never be `NULL`,
* the empty string marks the end of the headers.
* This memory segment must not be freed.
*/
static char *
next_header(libcoopgamma_context_t *restrict ctx)
{
char *rc = ctx->inbound + ctx->inbound_tail;
ctx->inbound_tail += strlen(rc) + 1;
return rc;
}
/**
* Get the payload of the inbound message
*
* Calling this function marks that the inbound message
* has been fully ready. You must call this function
* even if you do not expect a payload
*
* @param ctx The state of the library, must be connected
* @param n Output parameter for the size of the payload
* @return The payload (not NUL-terminated), `NULL` if
* there is no payload. Failure is impossible.
* This memory segment must not be freed.
*/
static char *
next_payload(libcoopgamma_context_t *restrict ctx, size_t *n)
{
char *rc;
ctx->have_all_headers = 0;
if ((*n = ctx->length)) {
rc = ctx->inbound + ctx->inbound_tail;
ctx->inbound_tail += *n;
ctx->length = 0;
return rc;
}
return NULL;
}
/**
* Tell the library that you will not be parsing a receive message
*
* @param ctx The state of the library, must be connected
*/
void
libcoopgamma_skip_message(libcoopgamma_context_t *restrict ctx)
{
size_t _n;
while (*next_header(ctx));
(void) next_payload(ctx, &_n);
}
/**
* Check whether the server sent an error, if so copy it to `ctx`
*
* This function will also reports EBADMSG if the message ID
* that the message is a response to does not match the request
* information, or if it is missing
*
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return 1 if the server sent an error (even indicating success),
* 0 on success, -1 on failure. Information about failure
* is copied `ctx`.
*/
static int
check_error(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict async)
{
char temp[3 * sizeof(uint64_t) + 1];
size_t old_tail = ctx->inbound_tail;
char *line;
char *value;
int command_ok = 0;
int have_in_response_to = 0;
int have_error = 0;
int bad = 0;
char *payload;
size_t n;
for (;;) {
line = next_header(ctx);
value = strchr(line, ':') + 2;
if (!*line) {
break;
} else if (!strcmp(line, "Command: error")) {
command_ok = 1;
} else if (strstr(line, "In response to: ") == line) {
uint32_t id = (uint32_t)atol(value);
have_in_response_to = 1 + !!have_in_response_to;
if (id != async->message_id) {
bad = 1;
} else {
sprintf(temp, "%" PRIu32, id);
if (strcmp(value, temp))
bad = 1;
}
} else if (strstr(line, "Error: ") == line) {
have_error = 1 + !!have_error;
ctx->error.server_side = 1;
ctx->error.custom = (strstr(value, "custom") == value);
if (ctx->error.custom) {
if (value[6] == '\0') {
ctx->error.number = 0;
continue;
} else if (value[6] != ' ') {
bad = 1;
continue;
}
value += 7;
}
ctx->error.number = (uint64_t)atoll(value);
sprintf(temp, "%" PRIu64, ctx->error.number);
if (strcmp(value, temp))
bad = 1;
}
}
if (!command_ok) {
ctx->inbound_tail = old_tail;
return 0;
}
payload = next_payload(ctx, &n);
if (payload) {
if (memchr(payload, '\0', n) || payload[n - 1] != '\n')
goto badmsg;
ctx->error.description = malloc(n);
if (ctx->error.description == NULL)
goto fail;
memcpy(ctx->error.description, payload, n - 1);
ctx->error.description[n - 1] = '\0';
}
if (bad || have_in_response_to != 1 || have_error != 1)
goto badmsg;
return 1;
badmsg:
errno = EBADMSG;
fail:
copy_errno(ctx);
return -1;
}
#if defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull"
#endif
/**
* List all available CRTC:s, send request part
*
* Cannot be used before connecting to the server
*
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_crtcs_send(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict async)
{
async->message_id = ctx->message_id;
SEND_MESSAGE(ctx, NULL, (size_t)0,
"Command: enumerate-crtcs\n"
"Message ID: %" PRIu32 "\n"
"\n",
ctx->message_id);
return 0;
fail:
copy_errno(ctx);
return -1;
}
/**
* List all available CRTC:s, receive response part
*
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return A `NULL`-terminated list of names. You should only free
* the outer pointer, inner pointers are subpointers of the
* outer pointer and cannot be freed. `NULL` on error, in
* which case `ctx->error` (rather than `errno`) is read
* for information about the error.
*/
char **
libcoopgamma_get_crtcs_recv(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict async)
{
char *line;
char *payload;
char *end;
int command_ok = 0;
size_t i, n, lines, len, length;
char **rc;
if (check_error(ctx, async))
return NULL;
for (;;) {
line = next_header(ctx);
if (!*line)
break;
else if (!strcmp(line, "Command: crtc-enumeration"))
command_ok = 1;
}
payload = next_payload(ctx, &n);
if (!command_ok || (n > 0 && payload[n - 1] != '\n')) {
errno = EBADMSG;
copy_errno(ctx);
return NULL;
}
line = payload;
end = payload + n;
lines = length = 0;
while (line != end) {
lines += 1;
length += len = (size_t)(strchr(line, '\n') + 1 - line);
line += len;
line[-1] = '\0';
}
rc = malloc((lines + 1) * sizeof(char *) + length);
if (!rc) {
copy_errno(ctx);
return NULL;
}
line = ((char *)rc) + (lines + 1) * sizeof(char *);
memcpy(line, payload, length);
rc[lines] = NULL;
for (i = 0; i < lines; i++) {
rc[i] = line;
line = strchr(line, '\0') + 1;
}
return rc;
}
/**
* List all available CRTC:s, synchronous version
*
* This is a synchronous request function, as such,
* you have to ensure that communication is blocking
* (default), and that there are not asynchronous
* requests waiting, it also means that EINTR:s are
* silently ignored and there no wait to cancel the
* operation without disconnection from the server
*
* @param ctx The state of the library, must be connected
* @return A `NULL`-terminated list of names. You should only free
* the outer pointer, inner pointers are subpointers of the
* outer pointer and cannot be freed. `NULL` on error, in
* which case `ctx->error` (rather than `errno`) is read
* for information about the error.
*/
char **
libcoopgamma_get_crtcs_sync(libcoopgamma_context_t *restrict ctx)
{
SYNC_CALL(libcoopgamma_get_crtcs_send(ctx, &async),
libcoopgamma_get_crtcs_recv(ctx, &async), (copy_errno(ctx), NULL));
}
/**
* Retrieve information about a CRTC:s gamma ramps, send request part
*
* Cannot be used before connecting to the server
*
* @param crtc The name of the CRTC
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_gamma_info_send(const char *restrict crtc, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull-compare"
#endif
if (crtc == NULL || strchr(crtc, '\n')) {
errno = EINVAL;
goto fail;
}
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic pop
#endif
async->message_id = ctx->message_id;
SEND_MESSAGE(ctx, NULL, (size_t)0,
"Command: get-gamma-info\n"
"Message ID: %" PRIu32 "\n"
"CRTC: %s\n"
"\n",
ctx->message_id, crtc);
return 0;
fail:
copy_errno(ctx);
return 0;
}
/**
* Retrieve information about a CRTC:s gamma ramps, receive response part
*
* @param info Output parameter for the information, must be initialised
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_get_gamma_info_recv(libcoopgamma_crtc_info_t *restrict info, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
char temp[3 * sizeof(size_t) + 1];
char *line;
char *value;
size_t _n;
int have_cooperative = 0, have_gamma_support = 0, have_colourspace = 0;
int have_depth = 0, have_white_x = 0, have_white_y = 0;
int have_red_size = 0, have_red_x = 0, have_red_y = 0;
int have_green_size = 0, have_green_x = 0, have_green_y = 0;
int have_blue_size = 0, have_blue_x = 0, have_blue_y = 0;
int bad = 0, r = 0, g = 0, b = 0, x = 0;
size_t *outz;
unsigned *outu;
int *have;
if (check_error(ctx, async))
return -1;
info->cooperative = 0; /* Should be in the response, but ... */
info->colourspace = LIBCOOPGAMMA_UNKNOWN;
for (;;) {
line = next_header(ctx);
value = strchr(line, ':') + 2;
if (!*line) {
break;
} else if (strstr(line, "Cooperative: ") == line) {
have_cooperative = 1 + !!have_cooperative;
if (!strcmp(value, "yes")) info->cooperative = 1;
else if (!strcmp(value, "no")) info->cooperative = 0;
else
bad = 1;
} else if (strstr(line, "Depth: ") == line) {
have_depth = 1 + !!have_depth;
if (!strcmp(value, "8")) info->depth = LIBCOOPGAMMA_UINT8;
else if (!strcmp(value, "16")) info->depth = LIBCOOPGAMMA_UINT16;
else if (!strcmp(value, "32")) info->depth = LIBCOOPGAMMA_UINT32;
else if (!strcmp(value, "64")) info->depth = LIBCOOPGAMMA_UINT64;
else if (!strcmp(value, "f")) info->depth = LIBCOOPGAMMA_FLOAT;
else if (!strcmp(value, "d")) info->depth = LIBCOOPGAMMA_DOUBLE;
else
bad = 1;
} else if (strstr(line, "Gamma support: ") == line) {
have_gamma_support = 1 + !!have_gamma_support;
if (!strcmp(value, "yes")) info->supported = LIBCOOPGAMMA_YES;
else if (!strcmp(value, "no")) info->supported = LIBCOOPGAMMA_NO;
else if (!strcmp(value, "maybe")) info->supported = LIBCOOPGAMMA_MAYBE;
else
bad = 1;
} else if ((r = (strstr(line, "Red size: ") == line)) ||
(g = (strstr(line, "Green size: ") == line)) ||
strstr(line, "Blue size: ") == line) {
if (r) have_red_size = 1 + !!have_red_size, outz = &info->red_size;
else if (g) have_green_size = 1 + !!have_green_size, outz = &info->green_size;
else have_blue_size = 1 + !!have_blue_size, outz = &info->blue_size;
*outz = (size_t)atol(value);
sprintf(temp, "%zu", *outz);
if (strcmp(value, temp))
bad = 1;
} else if ((x = r = (strstr(line, "Red x: ") == line)) ||
(r = (strstr(line, "Red y: ") == line)) ||
(x = g = (strstr(line, "Green x: ") == line)) ||
(g = (strstr(line, "Green y: ") == line)) ||
(x = b = (strstr(line, "Blue x: ") == line)) ||
(b = (strstr(line, "Blue y: ") == line)) ||
(x = (strstr(line, "White x: ") == line)) ||
strstr(line, "White y: ") == line) {
if (r && x) have = &have_red_x, outu = &info->red_x;
else if (r) have = &have_red_y, outu = &info->red_y;
else if (g && x) have = &have_green_x, outu = &info->green_x;
else if (g) have = &have_green_y, outu = &info->green_y;
else if (b && x) have = &have_blue_x, outu = &info->blue_x;
else if (b) have = &have_blue_y, outu = &info->blue_y;
else if (x) have = &have_white_x, outu = &info->white_x;
else have = &have_white_y, outu = &info->white_y;
*have = 1 + !!*have;
*outu = (unsigned)atoi(value);
sprintf(temp, "%u", *outu);
if (strcmp(value, temp))
bad = 1;
} else if (strstr(line, "Colour space: ") == line) {
have_colourspace = 1 + !!have_colourspace;
if (!strcmp(value, "sRGB")) info->colourspace = LIBCOOPGAMMA_SRGB;
else if (!strcmp(value, "RGB")) info->colourspace = LIBCOOPGAMMA_RGB;
else if (!strcmp(value, "non-RGB")) info->colourspace = LIBCOOPGAMMA_NON_RGB;
else if (!strcmp(value, "grey")) info->colourspace = LIBCOOPGAMMA_GREY;
else
info->colourspace = LIBCOOPGAMMA_UNKNOWN;
}
}
(void) next_payload(ctx, &_n);
info->have_gamut = (have_red_x && have_green_x && have_blue_x && have_white_x &&
have_red_y && have_green_y && have_blue_y && have_white_y);
if (bad || have_gamma_support != 1 || have_red_x > 1 || have_red_y > 1 ||
have_green_x > 1 || have_green_y > 1 || have_blue_x > 1 || have_blue_y > 1 ||
have_white_x > 1 || have_white_y > 1 || have_colourspace > 1) {
errno = EBADMSG;
copy_errno(ctx);
return -1;
}
if (info->supported != LIBCOOPGAMMA_NO) {
if (have_cooperative > 1 || have_depth != 1 || have_gamma_support != 1 ||
have_red_size != 1 || have_green_size != 1 || have_blue_size != 1) {
errno = EBADMSG;
copy_errno(ctx);
return -1;
}
}
return 0;
}
/**
* Retrieve information about a CRTC:s gamma ramps, synchronous version
*
* This is a synchronous request function, as such,
* you have to ensure that communication is blocking
* (default), and that there are not asynchronous
* requests waiting, it also means that EINTR:s are
* silently ignored and there no wait to cancel the
* operation without disconnection from the server
*
* @param crtc The name of the CRTC
* @param info Output parameter for the information, must be initialised
* @param ctx The state of the library, must be connected
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_get_gamma_info_sync(const char *restrict ctrc, libcoopgamma_crtc_info_t *restrict info,
libcoopgamma_context_t *restrict ctx)
{
SYNC_CALL(libcoopgamma_get_gamma_info_send(ctrc, ctx, &async),
libcoopgamma_get_gamma_info_recv(info, ctx, &async), (copy_errno(ctx), -1));
}
/**
* Retrieve the current gamma ramp adjustments, send request part
*
* Cannot be used before connecting to the server
*
* @param query The query to send
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_gamma_send(const libcoopgamma_filter_query_t *restrict query, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull-compare"
#endif
if (!query || !query->crtc || strchr(query->crtc, '\n')) {
errno = EINVAL;
goto fail;
}
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic pop
#endif
async->message_id = ctx->message_id;
async->coalesce = query->coalesce;
SEND_MESSAGE(ctx, NULL, (size_t)0,
"Command: get-gamma\n"
"Message ID: %" PRIu32 "\n"
"CRTC: %s\n"
"Coalesce: %s\n"
"High priority: %" PRIi64 "\n"
"Low priority: %" PRIi64 "\n"
"\n",
ctx->message_id, query->crtc, query->coalesce ? "yes" : "no",
query->high_priority, query->low_priority);
return 0;
fail:
copy_errno(ctx);
return -1;
}
/**
* Retrieve the current gamma ramp adjustments, receive response part
*
* @param table Output for the response, must be initialised
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_get_gamma_recv(libcoopgamma_filter_table_t *restrict table, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
char temp[3 * sizeof(size_t) + 1];
char *line;
char *value;
char *payload;
size_t i, n, width, clutsize;
int have_depth = 0;
int have_red_size = 0;
int have_green_size = 0;
int have_blue_size = 0;
int have_tables = 0;
int bad = 0, r = 0, g = 0;
size_t *out;
size_t off, len;
if (check_error(ctx, async))
return -1;
libcoopgamma_filter_table_destroy(table);
for (;;) {
line = next_header(ctx);
value = strchr(line, ':') + 2;
if (!*line) {
break;
} else if (strstr(line, "Depth: ") == line) {
have_depth = 1 + !!have_depth;
if (!strcmp(value, "8")) table->depth = LIBCOOPGAMMA_UINT8;
else if (!strcmp(value, "16")) table->depth = LIBCOOPGAMMA_UINT16;
else if (!strcmp(value, "32")) table->depth = LIBCOOPGAMMA_UINT32;
else if (!strcmp(value, "64")) table->depth = LIBCOOPGAMMA_UINT64;
else if (!strcmp(value, "f")) table->depth = LIBCOOPGAMMA_FLOAT;
else if (!strcmp(value, "d")) table->depth = LIBCOOPGAMMA_DOUBLE;
else
bad = 1;
} else if ((r = (strstr(line, "Red size: ") == line)) ||
(g = (strstr(line, "Green size: ") == line)) ||
strstr(line, "Blue size: ") == line) {
if (r) have_red_size = 1 + !!have_red_size, out = &table->red_size;
else if (g) have_green_size = 1 + !!have_green_size, out = &table->green_size;
else have_blue_size = 1 + !!have_blue_size, out = &table->blue_size;
*out = (size_t)atol(value);
sprintf(temp, "%zu", *out);
if (strcmp(value, temp))
bad = 1;
} else if (strstr(line, "Tables: ") == line) {
have_tables = 1 + have_tables;
table->filter_count = (size_t)atol(value);
sprintf(temp, "%zu", table->filter_count);
if (strcmp(value, temp))
bad = 1;
}
}
payload = next_payload(ctx, &n);
if (bad || have_depth != 1 || have_red_size != 1 || have_green_size != 1 ||
have_blue_size != 1 || (async->coalesce ? have_tables > 1 : !have_tables) ||
((!payload || !n) && (async->coalesce || table->filter_count > 0)) ||
(n > 0 && have_tables && !table->filter_count) ||
(async->coalesce && have_tables && table->filter_count != 1))
goto bad;
switch (table->depth) {
case LIBCOOPGAMMA_FLOAT: width = sizeof(float); break;
case LIBCOOPGAMMA_DOUBLE: width = sizeof(double); break;
default: INTEGRAL_DEPTHS
if (table->depth <= 0 || (table->depth & 7))
goto bad;
width = (size_t)(table->depth / 8);
break;
}
clutsize = table->red_size + table->green_size + table->blue_size;
clutsize *= width;
if (async->coalesce) {
if (n != clutsize)
goto bad;
table->filters = malloc(sizeof(*(table->filters)));
if (!table->filters)
goto fail;
table->filters->priority = 0;
table->filters->class = NULL;
table->filters->ramps.u8.red_size = table->red_size;
table->filters->ramps.u8.green_size = table->green_size;
table->filters->ramps.u8.blue_size = table->blue_size;
if (libcoopgamma_ramps_initialise_(&table->filters->ramps, width) < 0)
goto fail;
memcpy(table->filters->ramps.u8.red, payload, clutsize);
table->filter_count = 1;
} else if (!table->filter_count) {
table->filters = NULL;
} else {
off = 0;
table->filters = calloc(table->filter_count, sizeof(*table->filters));
if (!table->filters)
goto fail;
for (i = 0; i < table->filter_count; i++) {
if (off + sizeof(int64_t) > n)
goto bad;
table->filters[i].priority = *(int64_t *)(payload + off);
off += sizeof(int64_t);
if (!memchr(payload + off, '\0', n - off))
goto bad;
len = strlen(payload + off) + 1;
table->filters[i].class = malloc(len);
if (!table->filters[i].class)
goto fail;
memcpy(table->filters[i].class, payload + off, len);
off += len;
if (off + clutsize > n)
goto bad;
table->filters[i].ramps.u8.red_size = table->red_size;
table->filters[i].ramps.u8.green_size = table->green_size;
table->filters[i].ramps.u8.blue_size = table->blue_size;
if (libcoopgamma_ramps_initialise_(&(table->filters[i].ramps), width) < 0)
goto fail;
memcpy(table->filters->ramps.u8.red, payload + off, clutsize);
off += clutsize;
}
if (off != n)
goto bad;
}
return 0;
bad:
errno = EBADMSG;
fail:
copy_errno(ctx);
return -1;
}
/**
* Retrieve the current gamma ramp adjustments, synchronous version
*
* This is a synchronous request function, as such,
* you have to ensure that communication is blocking
* (default), and that there are not asynchronous
* requests waiting, it also means that EINTR:s are
* silently ignored and there no wait to cancel the
* operation without disconnection from the server
*
* @param query The query to send
* @param table Output for the response, must be initialised
* @param ctx The state of the library, must be connected
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_get_gamma_sync(const libcoopgamma_filter_query_t *restrict query, libcoopgamma_filter_table_t *restrict table,
libcoopgamma_context_t *restrict ctx)
{
SYNC_CALL(libcoopgamma_get_gamma_send(query, ctx, &async),
libcoopgamma_get_gamma_recv(table, ctx, &async), (copy_errno(ctx), -1));
}
/**
* Apply, update, or remove a gamma ramp adjustment, send request part
*
* Cannot be used before connecting to the server
*
* @param filter The filter to apply, update, or remove, gamma ramp meta-data must match the CRTC's
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_set_gamma_send(const libcoopgamma_filter_t *restrict filter, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
const void *payload = NULL;
const char *lifespan;
char priority[sizeof("Priority: \n") + 3 * sizeof(int64_t)] = {'\0'};
char length [sizeof("Length: \n") + 3 * sizeof(size_t) ] = {'\0'};
size_t payload_size = 0, stopwidth = 0;
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull-compare"
#endif
if (!filter || !filter->crtc || strchr(filter->crtc, '\n') || !filter->class || strchr(filter->class, '\n')) {
errno = EINVAL;
goto fail;
}
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic pop
#endif
switch (filter->lifespan) {
case LIBCOOPGAMMA_REMOVE: lifespan = "remove"; break;
case LIBCOOPGAMMA_UNTIL_DEATH: lifespan = "until-death"; break;
case LIBCOOPGAMMA_UNTIL_REMOVAL: lifespan = "until-removal"; break;
default:
errno = EINVAL;
goto fail;
}
if (filter->lifespan != LIBCOOPGAMMA_REMOVE) {
switch (filter->depth) {
case LIBCOOPGAMMA_FLOAT: stopwidth = sizeof(float); break;
case LIBCOOPGAMMA_DOUBLE: stopwidth = sizeof(double); break;
default: INTEGRAL_DEPTHS
if (filter->depth <= 0 || (filter->depth & 7)) {
errno = EINVAL;
goto fail;
}
stopwidth = (size_t)(filter->depth / 8);
break;
}
payload_size = filter->ramps.u8.red_size;
payload_size += filter->ramps.u8.green_size;
payload_size += filter->ramps.u8.blue_size;
payload_size *= stopwidth;
payload = filter->ramps.u8.red;
sprintf(priority, "Priority: %" PRIi64 "\n", filter->priority);
sprintf(length, "Length: %zu\n", payload_size);
}
async->message_id = ctx->message_id;
SEND_MESSAGE(ctx, payload, payload_size,
"Command: set-gamma\n"
"Message ID: %" PRIu32 "\n"
"CRTC: %s\n"
"Class: %s\n"
"Lifespan: %s\n"
"%s"
"%s"
"\n",
ctx->message_id, filter->crtc, filter->class, lifespan, priority, length);
return 0;
fail:
copy_errno(ctx);
return -1;
}
/**
* Apply, update, or remove a gamma ramp adjustment, receive response part
*
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_set_gamma_recv(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict async)
{
size_t _n = 0;
if (check_error(ctx, async))
return -(ctx->error.custom || ctx->error.number);
while (*next_header(ctx));
(void) next_payload(ctx, &_n);
errno = EBADMSG;
copy_errno(ctx);
return -1;
}
/**
* Apply, update, or remove a gamma ramp adjustment, synchronous version
*
* This is a synchronous request function, as such,
* you have to ensure that communication is blocking
* (default), and that there are not asynchronous
* requests waiting, it also means that EINTR:s are
* silently ignored and there no wait to cancel the
* operation without disconnection from the server
*
* @param filter The filter to apply, update, or remove, gamma ramp meta-data must match the CRTC's
* @param depth The datatype for the stops in the gamma ramps, must match the CRTC's
* @param ctx The state of the library, must be connected
* @return Zero on success, -1 on error, in which case `ctx->error`
* (rather than `errno`) is read for information about the error
*/
int
libcoopgamma_set_gamma_sync(const libcoopgamma_filter_t *restrict filter, libcoopgamma_context_t *restrict ctx)
{
SYNC_CALL(libcoopgamma_set_gamma_send(filter, ctx, &async),
libcoopgamma_set_gamma_recv(ctx, &async), (copy_errno(ctx), -1));
}
#if defined(__GNUC__)
# pragma GCC diagnostic pop
#endif
