diff options
Diffstat (limited to '')
| -rw-r--r-- | src/libcoopgamma.c | 180 |
1 files changed, 178 insertions, 2 deletions
diff --git a/src/libcoopgamma.c b/src/libcoopgamma.c index dd95fa1..82d9a2e 100644 --- a/src/libcoopgamma.c +++ b/src/libcoopgamma.c @@ -20,6 +20,7 @@ #include <sys/socket.h> #include <sys/wait.h> #include <errno.h> +#include <inttypes.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -107,6 +108,15 @@ char* argv0 __attribute__((weak)) = "libcoopgamma"; +#define copy_errno(ctx) \ + ((ctx)->error.number = (uint64_t)errno, \ + (ctx)->error.custom = 0, \ + (ctx)->error.server_side = 0, \ + free((ctx)->error.description), \ + (ctx)->error.description = NULL) + + + /** * Initialise a `libcoopgamma_ramps8_t`, `libcoopgamma_ramps16_t`, `libcoopgamma_ramps32_t`, * `libcoopgamma_ramps64_t`, `libcoopgamma_rampsf_t`, or `libcoopgamma_rampsd_t` @@ -1160,6 +1170,53 @@ int libcoopgamma_connect(const char* restrict method, const char* restrict site, /** + * 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 and only on error, `*(resp)` is set to `NULL` + */ +#define communicate(respp, ctx, payload, payload_size, format, ...) \ + do \ + { \ + ssize_t n__; \ + char* msg__; \ + snprintf(NULL, 0, format "%zn", __VA_ARGS__, &n__); \ + msg__ = malloc((size_t)n__ + (payload_size)); \ + if (msg__ == NULL) \ + { \ + copy_errno(ctx); \ + *(respp) = NULL; \ + break; \ + } \ + sprintf(msg__, format, __VA_ARGS__); \ + if ((payload) != NULL) \ + memcpy(msg__ + n__, (payload), (payload_size)); \ + *(respp) = (communicate)((ctx), msg__, (size_t)n__ + (payload_size)); \ + } \ + 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 NUL-terminated response, `NULL` on error + */ +static char* (communicate)(libcoopgamma_context_t* restrict ctx, char* msg, size_t n) +{ +} + + +/** * List all available CRTC:s * * Cannot be used before connecting to the server @@ -1173,6 +1230,13 @@ int libcoopgamma_connect(const char* restrict method, const char* restrict site, */ char** libcoopgamma_enumerate_crtcs(libcoopgamma_context_t* restrict ctx) { + char* resp; + + communicate(&resp, ctx, NULL, 0, + "Command: enumerate-crtcs\n" + "Message ID: %" PRIu32 "\n" + "\n", + ctx->message_id); } @@ -1190,6 +1254,26 @@ char** libcoopgamma_enumerate_crtcs(libcoopgamma_context_t* restrict ctx) int libcoopgamma_get_gamma_info(const char* crtc, libcoopgamma_crtc_info_t* restrict info, libcoopgamma_context_t* restrict ctx) { + char* resp; + + if ((crtc == NULL) || strchr(crtc, '\n')) + { + errno = EINVAL; + goto fail; + } + + communicate(&resp, ctx, NULL, 0, + "Command: get-gamma-info\n" + "Message ID: %" PRIu32 "\n" + "CRTC: %s\n" + "\n", + ctx->message_id, crtc); + if (resp == NULL) + return -1; + + fail: + copy_errno(ctx); + return -1; } @@ -1207,18 +1291,110 @@ int libcoopgamma_get_gamma_info(const char* crtc, libcoopgamma_crtc_info_t* rest int libcoopgamma_get_gamma(libcoopgamma_filter_query_t* restrict query, libcoopgamma_filter_table_t* restrict table, libcoopgamma_context_t* restrict ctx) { + char* resp; + + if ((query == NULL) || (query->crtc == NULL) || strchr(query->crtc, '\n')) + { + errno = EINVAL; + goto fail; + } + + communicate(&resp, ctx, NULL, 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); + if (resp == NULL) + return -1; + + fail: + copy_errno(ctx); + return -1; } /** * Apply, update, or remove a gamma ramp adjustment * - * @param filter The filter to apply, update, or remove + * @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(libcoopgamma_filter_t* restrict filter, libcoopgamma_context_t* restrict ctx) +int libcoopgamma_set_gamma(libcoopgamma_filter_t* restrict filter, libcoopgamma_depth_t depth, + libcoopgamma_context_t* restrict ctx) { + 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; + char* resp; + + if ((filter == NULL) || (filter->crtc == NULL) || strchr(filter->crtc, '\n') || + (filter->class == NULL) || strchr(filter->class, '\n')) + { + errno = EINVAL; + goto fail; + } + + 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; + } + + switch (depth) + { + case LIBCOOPGAMMA_FLOAT: stopwidth = sizeof(float); break; + case LIBCOOPGAMMA_DOUBLE: stopwidth = sizeof(double); break; + default: + if ((depth <= 0) || ((depth & 7) != 0)) + { + errno = EINVAL; + goto fail; + } + stopwidth = depth / 8; + break; + } + + if (filter->lifespan != LIBCOOPGAMMA_REMOVE) + { + 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); + } + + communicate(&resp, 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); + if (resp == NULL) + return -1; + + fail: + copy_errno(ctx); + return -1; } |