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swaybar: rewrite text protocol handling

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This now uses getline to correctly handle multiple or long statuses. It
also removes the struct text_protocol_state and moves its members into
the status_line struct.
This commit is contained in:
Ian Fan 2018-09-17 13:43:27 +01:00
parent babd9618b9
commit 70245c2cd5
2 changed files with 26 additions and 22 deletions
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8
include/swaybar/status_line.h
View file

@ -12,11 +12,6 @@ enum status_protocol {
PROTOCOL_I3BAR,
};
struct text_protocol_state {
char *buffer;
size_t buffer_size;
};
enum json_node_type {
JSON_NODE_UNKNOWN,
JSON_NODE_ARRAY,
@ -63,7 +58,8 @@ struct status_line {
const char *text;
struct wl_list blocks; // i3bar_block::link
struct text_protocol_state text_state;
char *buffer;
size_t buffer_size;
struct i3bar_protocol_state i3bar_state;
};

40
swaybar/status_line.c
View file

@ -30,27 +30,17 @@ void status_error(struct status_line *status, const char *text) {
}
bool status_handle_readable(struct status_line *status) {
ssize_t read_bytes = 1;
char *line;
switch (status->protocol) {
case PROTOCOL_ERROR:
return false;
case PROTOCOL_I3BAR:
if (i3bar_handle_readable(status) > 0) {
return true;
}
break;
case PROTOCOL_TEXT:
line = read_line_buffer(status->read,
status->text_state.buffer, status->text_state.buffer_size);
if (!line) {
status_error(status, "[error reading from status command]");
} else {
status->text = line;
}
return true;
case PROTOCOL_UNDEF:
line = read_line_buffer(status->read,
status->text_state.buffer, status->text_state.buffer_size);
status->buffer, status->buffer_size);
if (!line) {
status_error(status, "[error reading from status command]");
return false;
@ -81,7 +71,7 @@ bool status_handle_readable(struct status_line *status) {
}
status->protocol = PROTOCOL_I3BAR;
free(status->text_state.buffer);
free(status->buffer);
wl_list_init(&status->blocks);
status->i3bar_state.buffer_size = 4096;
status->i3bar_state.buffer =
@ -91,14 +81,32 @@ bool status_handle_readable(struct status_line *status) {
status->text = line;
}
return true;
case PROTOCOL_TEXT:
errno = 0;
while (true) {
if (status->buffer[read_bytes - 1] == '\n') {
status->buffer[read_bytes - 1] = '\0';
}
read_bytes = getline(&status->buffer,
&status->buffer_size, status->read);
if (errno == EAGAIN) {
clearerr(status->read);
return true;
} else if (errno) {
status_error(status, "[error reading from status command]");
return true;
}
}
default:
return false;
}
return false;
}
struct status_line *status_line_init(char *cmd) {
struct status_line *status = calloc(1, sizeof(struct status_line));
status->text_state.buffer_size = 8192;
status->text_state.buffer = malloc(status->text_state.buffer_size);
status->buffer_size = 8192;
status->buffer = malloc(status->buffer_size);
int pipe_read_fd[2];
int pipe_write_fd[2];
@ -148,7 +156,7 @@ void status_line_free(struct status_line *status) {
break;
}
default:
free(status->text_state.buffer);
free(status->buffer);
break;
}
free(status);