Use multiple write() calls to ensure full flush
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00180393ae
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f21eed2235
4 changed files with 190 additions and 6 deletions
82
examples/music.c
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82
examples/music.c
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@ -0,0 +1,82 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <skipstone/skipstone.h>
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static void usage(int argc, char **argv) {
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fprintf(stderr, "usage: %s /dev/rfcommX\n", argv[0]);
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exit(1);
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}
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int main(int argc, char **argv) {
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skipstone_watch_link *link;
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void *buf;
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uint16_t len, endpoint;
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struct {
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uint8_t command;
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uint8_t state;
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uint32_t track_position;
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uint32_t play_rate;
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uint8_t shuffle;
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uint8_t repeat;
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} play_state = {
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0x11, 0x01, 0, 44100, 0x01, 0x01
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};
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struct {
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uint8_t command;
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uint8_t artist_len;
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char artist[5];
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uint8_t album_len;
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char album[5];
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uint8_t title_len;
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char title[5];
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} play_track = {
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0x10, 5, "KMFDM", 5, "Nihil", 5, "Ultra"
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};
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struct {
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uint8_t command;
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uint8_t package_len;
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char package[8];
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uint8_t name_len;
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char name[8];
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} play_info = {
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0x13, 8, "DeaDBeeF", 8, "RealDead"
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};
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if (argc != 2) {
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usage(argc, argv);
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}
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if ((buf = malloc(SKIPSTONE_MESSAGE_MAX_PAYLOAD)) == NULL) {
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goto error_malloc_buf;
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}
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if ((link = skipstone_watch_link_open_serial(argv[1])) == NULL) {
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goto error_watch_link_open;
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}
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while (skipstone_recv(link, buf, &len, &endpoint) >= 0) {
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printf("Received message %hu bytes for endpoint %hu\n",
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len, endpoint);
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if (skipstone_send(link, &play_track, sizeof(play_track), 0x20) < 0) {
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printf("Balls\n");
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}
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}
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perror("skipstone_recv()");
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skipstone_watch_link_close(link);
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return 0;
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error_watch_link_open:
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free(buf);
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error_malloc_buf:
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return 1;
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}
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82
examples/music.c-e
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82
examples/music.c-e
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@ -0,0 +1,82 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <skipstone/skipstone.h>
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static void usage(int argc, char **argv) {
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fprintf(stderr, "usage: %s /dev/rfcommX\n", argv[0]);
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exit(1);
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}
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int main(int argc, char **argv) {
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skipstone_watch_link *link;
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void *buf;
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uint16_t len, endpoint;
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struct {
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uint8_t command;
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uint8_t state;
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uint32_t track_position;
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uint32_t play_rate;
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uint8_t shuffle;
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uint8_t repeat;
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} play_state = {
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0x11, 0x01, 0, 44100, 0x01, 0x01
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};
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struct {
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uint8_t command;
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uint8_t artist_len;
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char artist[5];
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uint8_t album_len;
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char album[5];
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uint8_t title_len;
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char title[5];
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} play_track = {
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0x10, 5, "KMFDM", 5, "Nihil", 5, "Ultra"
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};
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struct {
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uint8_t command;
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uint8_t package_len;
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char package[8];
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uint8_t name_len;
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char name[8];
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} play_info = {
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0x13, 8, "DeaDBeeF", 8, "RealDead"
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};
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if (argc != 2) {
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usage(argc, argv);
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}
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if ((buf = malloc(SKIPSTONE_MESSAGE_MAX_PAYLOAD)) == NULL) {
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goto error_malloc_buf;
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}
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if ((link = skipstone_watch_link_open_serial(argv[1])) == NULL) {
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goto error_watch_link_open;
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}
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while (skipstone_recv(link, buf, &len, &endpoint) >= 0) {
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printf("Received message %hu bytes for endpoint %hu\n",
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len, endpoint);
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if (skipstone_send(link, &play_track, sizeof(play_track), 0x20) < 0) {
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printf("Balls\n");
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}
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}
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perror("skipstone_recv()");
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skipstone_watch_link_close(link);
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return 0;
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error_watch_link_open:
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free(buf);
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error_malloc_buf:
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return 1;
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}
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@ -105,6 +105,11 @@ int skipstone_watch_link_close(skipstone_watch_link *link) {
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int skipstone_send(skipstone_watch_link *link, void *buf, uint16_t size, uint16_t endpoint) {
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skipstone_message_header header;
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ssize_t wrlen;
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size_t remaining = (size_t)size,
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offset = 0;
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if (size > SKIPSTONE_MESSAGE_MAX_PAYLOAD) {
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goto error_toobig;
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}
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@ -112,12 +117,17 @@ int skipstone_send(skipstone_watch_link *link, void *buf, uint16_t size, uint16_
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header.size = htobe16(size);
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header.endpoint = htobe16(endpoint);
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if (write(link->serial.fd, &header, sizeof(header)) < 0) {
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if ((wrlen = write(link->serial.fd, &header, sizeof(header))) < 0) {
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goto error_io;
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}
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if (write(link->serial.fd, buf, (size_t)size) < 0) {
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goto error_io;
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while (remaining) {
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if ((wrlen = write(link->serial.fd, (uint8_t *)buf + offset, remaining)) < 0) {
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goto error_io;
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}
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remaining -= (size_t)wrlen;
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offset += (size_t)wrlen;
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}
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return 0;
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@ -105,6 +105,11 @@ int skipstone_watch_link_close(skipstone_watch_link *link) {
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int skipstone_send(skipstone_watch_link *link, void *buf, uint16_t size, uint16_t endpoint) {
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skipstone_message_header header;
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ssize_t wrlen;
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size_t remaining = (size_t)size,
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offset = 0;
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if (size > SKIPSTONE_MESSAGE_MAX_PAYLOAD) {
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goto error_toobig;
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}
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@ -112,12 +117,17 @@ int skipstone_send(skipstone_watch_link *link, void *buf, uint16_t size, uint16_
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header.size = htobe16(size);
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header.endpoint = htobe16(endpoint);
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if (write(link->serial.fd, &header, sizeof(header)) < 0) {
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if ((wrlen = write(link->serial.fd, &header, sizeof(header))) < 0) {
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goto error_io;
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}
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if (write(link->serial.fd, buf, (size_t)size) < 0) {
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goto error_io;
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while (remaining) {
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if ((wrlen = write(link->serial.fd, (uint8_t *)buf + offset, remaining)) < 0) {
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goto error_io;
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}
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remaining -= (size_t)wrlen;
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offset += (size_t)wrlen;
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}
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return 0;
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