twin compton: use libpcre2 instead of libpcre

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 2bc7176522c8cb2b154894312e2687686d7885d8)

7 files changed, 51 insertions, 65 deletions

diff --git a/twin/compton-tde/CMakeLists.txt b/twin/compton-tde/CMakeLists.txt
index d432b533f..8e29dd12c 100644
--- a/twin/compton-tde/CMakeLists.txt
+++ b/twin/compton-tde/CMakeLists.txt
@@ -24,7 +24,7 @@ include_directories(
   ${XINERAMA_INCLUDE_DIRS}
   ${XRANDR_INCLUDE_DIRS}
   ${GL_INCLUDE_DIRS}
-  ${LIBPCRE_INCLUDE_DIRS}
+  ${LIBPCRE2_INCLUDE_DIRS}
 )
 
 link_directories(
@@ -33,7 +33,7 @@ link_directories(
   ${XINERAMA_LIBRARY_DIRS}
   ${XRANDR_LIBRARY_DIRS}
   ${GL_LIBRARY_DIRS}
-  ${LIBPCRE_LIBRARY_DIRS}
+  ${LIBPCRE2_LIBRARY_DIRS}
 )
 
 
@@ -46,8 +46,8 @@ link_directories(
 #  WITH_OPENGL            -> CONFIG_VSYNC_OPENGL
 #  WITH_OPENGL            -> CONFIG_VSYNC_OPENGL_GLSL
 #  WITH_OPENGL            -> CONFIG_VSYNC_OPENGL_FBO
-#  WITH_PCRE              -> CONFIG_REGEX_PCRE
-#  WITH_PCRE              -> CONFIG_REGEX_PCRE_JIT
+#  WITH_PCRE2             -> CONFIG_REGEX_PCRE2
+#  WITH_PCRE2             -> CONFIG_REGEX_PCRE2_JIT
 #  WITH_LIBCONFIG         -> CONFIG_LIBCONFIG
 #
 #  HAVE_LIBCONFIG_OLD_API -> CONFIG_LIBCONFIG_LEGACY (set up in compton_config.h)
@@ -90,10 +90,10 @@ if( WITH_XRANDR )
   list( APPEND compton_LIBRARIES ${XRANDR_LIBRARIES} )
 endif( )
 
-if( WITH_PCRE )
-  set( CONFIG_REGEX_PCRE        ${WITH_PCRE} )
-  set( CONFIG_REGEX_PCRE_JIT    ${WITH_PCRE} )
-  list( APPEND compton_LIBRARIES ${LIBPCRE_LIBRARIES} )
+if( WITH_PCRE2 )
+  set( CONFIG_REGEX_PCRE2        ${WITH_PCRE2} )
+  set( CONFIG_REGEX_PCRE2_JIT    ${WITH_PCRE2} )
+  list( APPEND compton_LIBRARIES ${LIBPCRE2_LIBRARIES} )
 endif( )
 
 configure_file( compton_config.h.cmake compton_config.h )
diff --git a/twin/compton-tde/c2.c b/twin/compton-tde/c2.c
index 6baf1337e..147cb781d 100644
--- a/twin/compton-tde/c2.c
+++ b/twin/compton-tde/c2.c
@@ -785,33 +785,34 @@ c2_l_postprocess(session_t *ps, c2_l_t *pleaf) {
 
   // PCRE patterns
   if (C2_L_PTSTRING == pleaf->ptntype && C2_L_MPCRE == pleaf->match) {
-#ifdef CONFIG_REGEX_PCRE
-    const char *error = NULL;
-    int erroffset = 0;
-    int options = 0;
+#ifdef CONFIG_REGEX_PCRE2
+    int errorCode;
+    PCRE2_SIZE errorOffset;
+    uint32_t options = 0;
 
     // Ignore case flag
     if (pleaf->match_ignorecase)
-      options |= PCRE_CASELESS;
+      options |= PCRE2_CASELESS;
 
-    // Compile PCRE expression
-    pleaf->regex_pcre = pcre_compile(pleaf->ptnstr, options,
-        &error, &erroffset, NULL);
+    // Compile PCRE2 expression
+    pleaf->regex_pcre = pcre2_compile((PCRE2_SPTR)pleaf->ptnstr, PCRE2_ZERO_TERMINATED,
+            options, &errorCode, &errorOffset, NULL);
     if (!pleaf->regex_pcre)
-      c2_error("Pattern \"%s\": PCRE regular expression parsing failed on "
-          "offset %d: %s", pleaf->ptnstr, erroffset, error);
-#ifdef CONFIG_REGEX_PCRE_JIT
-    pleaf->regex_pcre_extra = pcre_study(pleaf->regex_pcre,
-        PCRE_STUDY_JIT_COMPILE, &error);
-    if (!pleaf->regex_pcre_extra) {
-      printf("Pattern \"%s\": PCRE regular expression study failed: %s",
-          pleaf->ptnstr, error);
+    {
+      PCRE2_UCHAR errorMsg[256];
+      pcre2_get_error_message(errorCode, errorMsg, sizeof(errorMsg));
+      c2_error("Pattern \"%s\": PCRE2 regular expression parsing failed on "
+          "offset %zu: %s", pleaf->ptnstr, errorOffset, errorMsg);
+    }
+#ifdef CONFIG_REGEX_PCRE2_JIT
+    int jit_res = pcre2_jit_compile(pleaf->regex_pcre, PCRE2_JIT_COMPLETE);
+    if (jit_res < 0)
+    {
+      printf("Pattern \"%s\": PCRE2 regular expression JIT compilation failed with error code %d",
+          pleaf->ptnstr, jit_res);
     }
 #endif
 
-    // Free the target string
-    // free(pleaf->tgt);
-    // pleaf->tgt = NULL;
 #else
     c2_error("PCRE regular expression support not compiled in.");
 #endif
@@ -844,9 +845,8 @@ c2_free(c2_ptr_t p) {
 
     free(pleaf->tgt);
     free(pleaf->ptnstr);
-#ifdef CONFIG_REGEX_PCRE
-    pcre_free(pleaf->regex_pcre);
-    LPCRE_FREE_STUDY(pleaf->regex_pcre_extra);
+#ifdef CONFIG_REGEX_PCRE2
+    pcre2_code_free(pleaf->regex_pcre);
 #endif
     free(pleaf);
   }
@@ -1180,10 +1180,9 @@ c2_match_once_leaf(session_t *ps, win *w, const c2_l_t *pleaf,
                 }
                 break;
               case C2_L_MPCRE:
-#ifdef CONFIG_REGEX_PCRE
-                *pres = (pcre_exec(pleaf->regex_pcre,
-                      pleaf->regex_pcre_extra,
-                      tgt, strlen(tgt), 0, 0, NULL, 0) >= 0);
+#ifdef CONFIG_REGEX_PCRE2
+                *pres = (pcre2_match(pleaf->regex_pcre, (PCRE2_SPTR)tgt, PCRE2_ZERO_TERMINATED,
+                         0, 0, NULL, NULL) >= 0);
 #else
                 assert(0);
 #endif
diff --git a/twin/compton-tde/c2.h b/twin/compton-tde/c2.h
index 9e04c09a8..c84836c25 100644
--- a/twin/compton-tde/c2.h
+++ b/twin/compton-tde/c2.h
@@ -13,18 +13,10 @@
 #include <fnmatch.h>
 #include <ctype.h>
 
-// libpcre
-#ifdef CONFIG_REGEX_PCRE
-#include <pcre.h>
-
-// For compatiblity with <libpcre-8.20
-#ifndef PCRE_STUDY_JIT_COMPILE
-#define PCRE_STUDY_JIT_COMPILE    0
-#define LPCRE_FREE_STUDY(extra)   pcre_free(extra)
-#else
-#define LPCRE_FREE_STUDY(extra)   pcre_free_study(extra)
-#endif
-
+// libpcre2
+#ifdef CONFIG_REGEX_PCRE2
+#define PCRE2_CODE_UNIT_WIDTH 8
+#include <pcre2.h>
 #endif
 
 #define C2_MAX_LEVELS 10
@@ -139,9 +131,8 @@ struct _c2_l {
   } ptntype;
   char *ptnstr;
   long ptnint;
-#ifdef CONFIG_REGEX_PCRE
-  pcre *regex_pcre;
-  pcre_extra *regex_pcre_extra;
+#ifdef CONFIG_REGEX_PCRE2
+  pcre2_code *regex_pcre;
 #endif
 };
 
diff --git a/twin/compton-tde/common.h b/twin/compton-tde/common.h
index 9091fc582..d92396cdf 100644
--- a/twin/compton-tde/common.h
+++ b/twin/compton-tde/common.h
@@ -38,12 +38,10 @@
 // #define MONITOR_REPAINT  1
 // #define DEBUG_FADE       1
 
-// Whether to enable PCRE regular expression support in blacklists, enabled
-// by default
-// #define CONFIG_REGEX_PCRE 1
-// Whether to enable JIT support of libpcre. This may cause problems on PaX
-// kernels.
-// #define CONFIG_REGEX_PCRE_JIT 1
+// Whether to enable PCRE2 regular expression support in blacklists, enabled by default
+// #define CONFIG_REGEX_PCRE2 1
+// Whether to enable JIT support of libpcre2. This may cause problems on PaX kernels.
+// #define CONFIG_REGEX_PCRE2_JIT 1
 // Whether to enable parsing of configuration files using libconfig.
 // #define CONFIG_LIBCONFIG 1
 // Whether we are using a legacy version of libconfig (1.3.x).
diff --git a/twin/compton-tde/compton_config.h.cmake b/twin/compton-tde/compton_config.h.cmake
index bf3f22543..b534b1b80 100644
--- a/twin/compton-tde/compton_config.h.cmake
+++ b/twin/compton-tde/compton_config.h.cmake
@@ -1,11 +1,9 @@
 #include "config.h"
 
-// Whether to enable PCRE regular expression support in blacklists, enabled
-// by default
-#cmakedefine CONFIG_REGEX_PCRE 1
-// Whether to enable JIT support of libpcre. This may cause problems on PaX
-// kernels.
-#cmakedefine CONFIG_REGEX_PCRE_JIT 1
+// Whether to enable PCRE2 regular expression support in blacklists, enabled by default
+#cmakedefine CONFIG_REGEX_PCRE2 1
+// Whether to enable JIT support of libpcre2. This may cause problems on PaX kernels.
+#cmakedefine CONFIG_REGEX_PCRE2_JIT 1
 
 // Whether to enable parsing of configuration files using libconfig.
 #cmakedefine CONFIG_LIBCONFIG 1
diff --git a/twin/compton-tde/man/compton-tde.1.html b/twin/compton-tde/man/compton-tde.1.html
index 26d2a3b21..34243b08e 100644
--- a/twin/compton-tde/man/compton-tde.1.html
+++ b/twin/compton-tde/man/compton-tde.1.html
@@ -1422,7 +1422,7 @@ compton(1) Manual Page
 <div class="paragraph"><p><em>FORMAT</em> (optional) specifies the format of the property, 8, 16, or 32. On absence we use format X reports. Do not specify it for predefined or string targets.</p></div>

 <div class="paragraph"><p><em>TYPE</em> is a single character representing the type of the property to match for: <tt>c</tt> for <em>CARDINAL</em>, <tt>a</tt> for <em>ATOM</em>, <tt>w</tt> for <em>WINDOW</em>, <tt>d</tt> for <em>DRAWABLE</em>, <tt>s</tt> for <em>STRING</em> (and any other string types, such as <em>UTF8_STRING</em>). Do not specify it for predefined targets.</p></div>

 <div class="paragraph"><p><em>OP QUALIFIER</em> (optional), applicable only for equals operator, could be <tt>?</tt> (ignore-case).</p></div>

-<div class="paragraph"><p><em>MATCH TYPE</em> (optional), applicable only for equals operator, could be nothing (exact match), <tt>*</tt> (match anywhere), <tt>^</tt> (match from start), <tt>%</tt> (wildcard), or <tt>~</tt> (PCRE regular expression).</p></div>

+<div class="paragraph"><p><em>MATCH TYPE</em> (optional), applicable only for equals operator, could be nothing (exact match), <tt>*</tt> (match anywhere), <tt>^</tt> (match from start), <tt>%</tt> (wildcard), or <tt>~</tt> (PCRE2 regular expression).</p></div>

 <div class="paragraph"><p><em>OPERATOR</em> is one of <tt>=</tt> (equals), <tt>&lt;</tt>, <tt>&gt;</tt>, <tt>&lt;=</tt>, <tt>=&gt;</tt>, or nothing (exists). Exists operator checks whether a property exists on a window (but for predefined targets, exists means != 0 then).</p></div>

 <div class="paragraph"><p><em>PATTERN</em> is either an integer or a string enclosed by single or double quotes. Python-3-style escape sequences and raw string are supported in the string format.</p></div>

 <div class="paragraph"><p>Supported logical operators are <tt>&amp;&amp;</tt> (and) and <tt>||</tt> (or). <tt>&amp;&amp;</tt> has higher precedence than <tt>||</tt>, left-to-right associativity. Use parentheses to change precedence.</p></div>

@@ -1468,7 +1468,7 @@ name = r"\x64\x64\o64"</tt></pre>
 <pre><tt>condition = TARGET:TYPE[FLAGS]:PATTERN</tt></pre>

 </div></div>

 <div class="paragraph"><p><em>TARGET</em> is one of "n" (window name), "i" (window class instance), "g" (window general class), and "r" (window role).</p></div>

-<div class="paragraph"><p><em>TYPE</em> is one of "e" (exact match), "a" (match anywhere), "s" (match from start), "w" (wildcard), and "p" (PCRE regular expressions, if compiled with the support).</p></div>

+<div class="paragraph"><p><em>TYPE</em> is one of "e" (exact match), "a" (match anywhere), "s" (match from start), "w" (wildcard), and "p" (PCRE2 regular expressions, if compiled with the support).</p></div>

 <div class="paragraph"><p><em>FLAGS</em> could be a series of flags. Currently the only defined flag is "i" (ignore case).</p></div>

 <div class="paragraph"><p><em>PATTERN</em> is the actual pattern string.</p></div>

 </div>

diff --git a/twin/compton-tde/man/compton.1 b/twin/compton-tde/man/compton.1
index 964c4158d..a4e4dd7d9 100644
--- a/twin/compton-tde/man/compton.1
+++ b/twin/compton-tde/man/compton.1
@@ -659,7 +659,7 @@ With greater\-than/less\-than operators it looks like:
 .sp
 \fIOP QUALIFIER\fR (optional), applicable only for equals operator, could be ? (ignore\-case)\&.
 .sp
-\fIMATCH TYPE\fR (optional), applicable only for equals operator, could be nothing (exact match), * (match anywhere), ^ (match from start), % (wildcard), or ~ (PCRE regular expression)\&.
+\fIMATCH TYPE\fR (optional), applicable only for equals operator, could be nothing (exact match), * (match anywhere), ^ (match from start), % (wildcard), or ~ (PCRE2 regular expression)\&.
 .sp
 \fIOPERATOR\fR is one of = (equals), <, >, <=, =>, or nothing (exists)\&. Exists operator checks whether a property exists on a window (but for predefined targets, exists means != 0 then)\&.
 .sp
@@ -720,7 +720,7 @@ condition = TARGET:TYPE[FLAGS]:PATTERN
 .sp
 \fITARGET\fR is one of "n" (window name), "i" (window class instance), "g" (window general class), and "r" (window role)\&.
 .sp
-\fITYPE\fR is one of "e" (exact match), "a" (match anywhere), "s" (match from start), "w" (wildcard), and "p" (PCRE regular expressions, if compiled with the support)\&.
+\fITYPE\fR is one of "e" (exact match), "a" (match anywhere), "s" (match from start), "w" (wildcard), and "p" (PCRE2 regular expressions, if compiled with the support)\&.
 .sp
 \fIFLAGS\fR could be a series of flags\&. Currently the only defined flag is "i" (ignore case)\&.
 .sp