Changed regular expressions to use PCRE for i3 compatibility

1 files changed, 17 insertions, 23 deletions

diff --git a/sway/criteria.c b/sway/criteria.c
index bd99461d..706da04f 100644
--- a/sway/criteria.c
+++ b/sway/criteria.c
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
-#include <regex.h>
+#include <pcre.h>
 #include "sway/criteria.h"
 #include "sway/container.h"
 #include "sway/config.h"
@@ -42,18 +42,13 @@ static const char * const criteria_strings[] = {
  */
 struct crit_token {
         enum criteria_type type;
-        regex_t *regex;
+        pcre *regex;
         char *raw;
 };
 
 static void free_crit_token(struct crit_token *crit) {
-        if (crit->regex) {
-                regfree(crit->regex);
-                free(crit->regex);
-        }
-        if (crit->raw) {
-                free(crit->raw);
-        }
+        pcre_free(crit->regex);
+        free(crit->raw);
         free(crit);
 }
 
@@ -190,18 +185,17 @@ static char *parse_criteria_name(enum criteria_type *type, char *name) {
 }
 
 // Returns error string on failure or NULL otherwise.
-static char *generate_regex(regex_t **regex, char *value) {
-        *regex = calloc(1, sizeof(regex_t));
-        int err = regcomp(*regex, value, REG_NOSUB);
-        if (err != 0) {
-                char *reg_err = malloc(64);
-                regerror(err, *regex, reg_err, 64);
+static char *generate_regex(pcre **regex, char *value) {
+        const char *reg_err;
+        int offset;
+
+        *regex = pcre_compile(value, PCRE_UTF8 | PCRE_UCP, &reg_err, &offset, NULL);
 
+        if (!*regex) {
                 const char *fmt = "Regex compilation (for '%s') failed: %s";
                 int len = strlen(fmt) + strlen(value) + strlen(reg_err) - 3;
                 char *error = malloc(len);
                 snprintf(error, len, fmt, value, reg_err);
-                free(reg_err);
                 return error;
         }
         return NULL;
@@ -245,8 +239,8 @@ ect_cleanup:
         return error;
 }
 
-static int regex_cmp(const char *item, const regex_t *regex) {
-    return regexec(regex, item, 0, NULL, 0);
+static int regex_cmp(const char *item, const pcre *regex) {
+    return pcre_exec(regex, NULL, item, strlen(item), 0, 0, NULL, 0);
 }
 
 // test a single view if it matches list of criteria tokens (all of them).
@@ -266,7 +260,7 @@ static bool criteria_test(swayc_t *cont, list_t *tokens) {
                                 if (focused->class && strcmp(cont->class, focused->class) == 0) {
                                         matches++;
                                 }
-                        } else if (crit->regex && regexec(crit->regex, cont->class, 0, NULL, 0) == 0) {
+                        } else if (crit->regex && regex_cmp(cont->class, crit->regex) == 0) {
                                 matches++;
                         }
                         break;
@@ -281,7 +275,7 @@ static bool criteria_test(swayc_t *cont, list_t *tokens) {
                 case CRIT_ID:
                         if (!cont->app_id) {
                                 // ignore
-                        } else if (crit->regex && regexec(crit->regex, cont->app_id, 0, NULL, 0) == 0) {
+                        } else if (crit->regex && regex_cmp(cont->app_id, crit->regex) == 0) {
                                 matches++;
                         }
                         break;
@@ -293,7 +287,7 @@ static bool criteria_test(swayc_t *cont, list_t *tokens) {
                                 if (focused->instance && strcmp(cont->instance, focused->instance) == 0) {
                                         matches++;
                                 }
-                        } else if (crit->regex && regexec(crit->regex, cont->instance, 0, NULL, 0) == 0) {
+                        } else if (crit->regex && regex_cmp(cont->instance, crit->regex) == 0) {
                                 matches++;
                         }
                         break;
@@ -305,7 +299,7 @@ static bool criteria_test(swayc_t *cont, list_t *tokens) {
                                 if (focused->name && strcmp(cont->name, focused->name) == 0) {
                                         matches++;
                                 }
-                        } else if (crit->regex && regexec(crit->regex, cont->name, 0, NULL, 0) == 0) {
+                        } else if (crit->regex && regex_cmp(cont->name, crit->regex) == 0) {
                                 matches++;
                         }
                         break;
@@ -325,7 +319,7 @@ static bool criteria_test(swayc_t *cont, list_t *tokens) {
                                 if (focused_ws->name && strcmp(cont_ws->name, focused_ws->name) == 0) {
                                         matches++;
                                 }
-                        } else if (crit->regex && regexec(crit->regex, cont_ws->name, 0, NULL, 0) == 0) {
+                        } else if (crit->regex && regex_cmp(cont_ws->name, crit->regex) == 0) {
                                 matches++;
                         }
                         break;