9200094203
This has multiple effects: 1) The i3 codebase is now consistently formatted. clang-format uncovered plenty of places where inconsistent code made it into our code base. 2) When writing code, you don’t need to think or worry about our coding style. Write it in yours, then run clang-format-3.5 3) When submitting patches, we don’t need to argue about coding style. The basic idea is that we don’t want to care about _how_ we write the code, but _what_ it does :). The coding style that we use is defined in the .clang-format config file and is based on the google style, but adapted in such a way that the number of modifications to the i3 code base is minimal.
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3bar - an xcb-based status- and ws-bar for i3
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* © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
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*
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* parse_json_header.c: Parse the JSON protocol header to determine
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* protocol version and features.
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*
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <err.h>
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#include <ev.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <yajl/yajl_common.h>
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#include <yajl/yajl_parse.h>
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#include <yajl/yajl_version.h>
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#include "common.h"
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static enum {
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KEY_VERSION,
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KEY_STOP_SIGNAL,
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KEY_CONT_SIGNAL,
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KEY_CLICK_EVENTS,
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NO_KEY
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} current_key;
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static int header_integer(void *ctx, long long val) {
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i3bar_child *child = ctx;
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switch (current_key) {
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case KEY_VERSION:
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child->version = val;
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break;
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case KEY_STOP_SIGNAL:
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child->stop_signal = val;
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break;
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case KEY_CONT_SIGNAL:
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child->cont_signal = val;
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break;
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default:
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break;
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}
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return 1;
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}
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static int header_boolean(void *ctx, int val) {
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i3bar_child *child = ctx;
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switch (current_key) {
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case KEY_CLICK_EVENTS:
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child->click_events = val;
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break;
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default:
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break;
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}
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return 1;
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}
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#define CHECK_KEY(name) (stringlen == strlen(name) && \
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STARTS_WITH((const char *)stringval, stringlen, name))
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static int header_map_key(void *ctx, const unsigned char *stringval, size_t stringlen) {
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if (CHECK_KEY("version")) {
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current_key = KEY_VERSION;
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} else if (CHECK_KEY("stop_signal")) {
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current_key = KEY_STOP_SIGNAL;
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} else if (CHECK_KEY("cont_signal")) {
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current_key = KEY_CONT_SIGNAL;
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} else if (CHECK_KEY("click_events")) {
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current_key = KEY_CLICK_EVENTS;
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}
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return 1;
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}
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static void child_init(i3bar_child *child) {
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child->version = 0;
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child->stop_signal = SIGSTOP;
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child->cont_signal = SIGCONT;
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}
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/*
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* Parse the JSON protocol header to determine protocol version and features.
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* In case the buffer does not contain a valid header (invalid JSON, or no
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* version field found), the 'correct' field of the returned header is set to
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* false. The amount of bytes consumed by parsing the header is returned in
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* *consumed (if non-NULL).
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*
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*/
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void parse_json_header(i3bar_child *child, const unsigned char *buffer, int length, unsigned int *consumed) {
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static yajl_callbacks version_callbacks = {
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.yajl_boolean = header_boolean,
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.yajl_integer = header_integer,
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.yajl_map_key = &header_map_key,
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};
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child_init(child);
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current_key = NO_KEY;
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yajl_handle handle = yajl_alloc(&version_callbacks, NULL, child);
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/* Allow trailing garbage. yajl 1 always behaves that way anyways, but for
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* yajl 2, we need to be explicit. */
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yajl_config(handle, yajl_allow_trailing_garbage, 1);
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yajl_status state = yajl_parse(handle, buffer, length);
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if (state != yajl_status_ok) {
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child_init(child);
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if (consumed != NULL)
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*consumed = 0;
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} else {
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if (consumed != NULL)
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*consumed = yajl_get_bytes_consumed(handle);
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}
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yajl_free(handle);
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}
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