* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
- * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* commands_parser.c: hand-written parser to parse commands (commands are what
* you bind on keys and what you can send to i3 using the IPC interface, like
#include "all.h"
// Macros to make the YAJL API a bit easier to use.
-#define y(x, ...) (command_output.json_gen != NULL ? yajl_gen_ ## x (command_output.json_gen, ##__VA_ARGS__) : 0)
-#define ystr(str) (command_output.json_gen != NULL ? yajl_gen_string(command_output.json_gen, (unsigned char*)str, strlen(str)) : 0)
+#define y(x, ...) (command_output.json_gen != NULL ? yajl_gen_##x(command_output.json_gen, ##__VA_ARGS__) : 0)
+#define ystr(str) (command_output.json_gen != NULL ? yajl_gen_string(command_output.json_gen, (unsigned char *)str, strlen(str)) : 0)
/*******************************************************************************
* The data structures used for parsing. Essentially the current state and a
#include "GENERATED_command_call.h"
-
static void next_state(const cmdp_token *token) {
if (token->next_state == __CALL) {
subcommand_output.json_gen = command_output.json_gen;
}
}
+/*
+ * Parses a string (or word, if as_word is true). Extracted out of
+ * parse_command so that it can be used in src/workspace.c for interpreting
+ * workspace commands.
+ *
+ */
+char *parse_string(const char **walk, bool as_word) {
+ const char *beginning = *walk;
+ /* Handle quoted strings (or words). */
+ if (**walk == '"') {
+ beginning++;
+ (*walk)++;
+ for (; **walk != '\0' && **walk != '"'; (*walk)++)
+ if (**walk == '\\' && *(*walk + 1) != '\0')
+ (*walk)++;
+ } else {
+ if (!as_word) {
+ /* For a string (starting with 's'), the delimiters are
+ * comma (,) and semicolon (;) which introduce a new
+ * operation or command, respectively. Also, newlines
+ * end a command. */
+ while (**walk != ';' && **walk != ',' &&
+ **walk != '\0' && **walk != '\r' &&
+ **walk != '\n')
+ (*walk)++;
+ } else {
+ /* For a word, the delimiters are white space (' ' or
+ * '\t'), closing square bracket (]), comma (,) and
+ * semicolon (;). */
+ while (**walk != ' ' && **walk != '\t' &&
+ **walk != ']' && **walk != ',' &&
+ **walk != ';' && **walk != '\r' &&
+ **walk != '\n' && **walk != '\0')
+ (*walk)++;
+ }
+ }
+ if (*walk == beginning)
+ return NULL;
+
+ char *str = scalloc(*walk - beginning + 1);
+ /* We copy manually to handle escaping of characters. */
+ int inpos, outpos;
+ for (inpos = 0, outpos = 0;
+ inpos < (*walk - beginning);
+ inpos++, outpos++) {
+ /* We only handle escaped double quotes and backslashes to not break
+ * backwards compatibility with people using \w in regular expressions
+ * etc. */
+ if (beginning[inpos] == '\\' && (beginning[inpos + 1] == '"' || beginning[inpos + 1] == '\\'))
+ inpos++;
+ str[outpos] = beginning[inpos];
+ }
+
+ return str;
+}
+
/*
* Parses and executes the given command. If a caller-allocated yajl_gen is
* passed, a json reply will be generated in the format specified by the ipc
const cmdp_token *token;
bool token_handled;
- // TODO: make this testable
+// TODO: make this testable
#ifndef TEST_PARSER
cmd_criteria_init(¤t_match, &subcommand_output);
#endif
while ((size_t)(walk - input) <= len) {
/* skip whitespace and newlines before every token */
while ((*walk == ' ' || *walk == '\t' ||
- *walk == '\r' || *walk == '\n') && *walk != '\0')
+ *walk == '\r' || *walk == '\n') &&
+ *walk != '\0')
walk++;
cmdp_token_ptr *ptr = &(tokens[state]);
if (strcmp(token->name, "string") == 0 ||
strcmp(token->name, "word") == 0) {
- const char *beginning = walk;
- /* Handle quoted strings (or words). */
- if (*walk == '"') {
- beginning++;
- walk++;
- while (*walk != '\0' && (*walk != '"' || *(walk-1) == '\\'))
- walk++;
- } else {
- if (token->name[0] == 's') {
- /* For a string (starting with 's'), the delimiters are
- * comma (,) and semicolon (;) which introduce a new
- * operation or command, respectively. Also, newlines
- * end a command. */
- while (*walk != ';' && *walk != ',' &&
- *walk != '\0' && *walk != '\r' &&
- *walk != '\n')
- walk++;
- } else {
- /* For a word, the delimiters are white space (' ' or
- * '\t'), closing square bracket (]), comma (,) and
- * semicolon (;). */
- while (*walk != ' ' && *walk != '\t' &&
- *walk != ']' && *walk != ',' &&
- *walk != ';' && *walk != '\r' &&
- *walk != '\n' && *walk != '\0')
- walk++;
- }
- }
- if (walk != beginning) {
- char *str = scalloc(walk-beginning + 1);
- /* We copy manually to handle escaping of characters. */
- int inpos, outpos;
- for (inpos = 0, outpos = 0;
- inpos < (walk-beginning);
- inpos++, outpos++) {
- /* We only handle escaped double quotes to not break
- * backwards compatibility with people using \w in
- * regular expressions etc. */
- if (beginning[inpos] == '\\' && beginning[inpos+1] == '"')
- inpos++;
- str[outpos] = beginning[inpos];
- }
+ char *str = parse_string(&walk, (token->name[0] != 's'));
+ if (str != NULL) {
if (token->identifier)
push_string(token->identifier, str);
/* If we are at the end of a quoted string, skip the ending
if (*walk == '\0' || *walk == ',' || *walk == ';') {
next_state(token);
token_handled = true;
- /* To make sure we start with an appropriate matching
+/* To make sure we start with an appropriate matching
* datastructure for commands which do *not* specify any
* criteria, we re-initialize the criteria system after
* every command. */
- // TODO: make this testable
+// TODO: make this testable
#ifndef TEST_PARSER
if (*walk == '\0' || *walk == ';')
cmd_criteria_init(¤t_match, &subcommand_output);
#endif
walk++;
break;
- }
- }
+ }
+ }
}
if (!token_handled) {
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