From 1d23f466a28be3ffc998fc3c1742df4119461f7f Mon Sep 17 00:00:00 2001
From: Diego Joss <djego.joss@gmail.com>
Date: Mon, 11 Feb 2013 14:11:15 +0100
Subject: [PATCH] replace g_content_type_guess with libmagic

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
---
 Makefile   |  6 ++++++
 config.mk  |  8 ++++++++
 document.c | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+)

diff --git a/Makefile b/Makefile
index 99628a7..a72be8d 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,12 @@ else
 SOURCE = $(filter-out database-sqlite.c,$(OSOURCE))
 endif
 
+ifneq (${WITH_MAGIC},)
+INCS += $(MAGIC_INC)
+LIBS += $(MAGIC_LIB)
+CPPFLAGS += -DWITH_MAGIC
+endif
+
 ifneq ($(wildcard ${VALGRIND_SUPPRESSION_FILE}),)
 VALGRIND_ARGUMENTS += --suppressions=${VALGRIND_SUPPRESSION_FILE}
 endif
diff --git a/config.mk b/config.mk
index bd20747..e1b13a9 100644
--- a/config.mk
+++ b/config.mk
@@ -23,6 +23,9 @@ GIRARA_VERSION_CHECK ?= $(shell pkg-config --atleast-version=$(GIRARA_MIN_VERSIO
 # To disable support for the sqlite backend set WITH_SQLITE to 0.
 WITH_SQLITE ?= $(shell (pkg-config --atleast-version=3.5.9 sqlite3 && echo 1) || echo 0)
 
+# to disable use of libmagic for filetype detection comment the following line
+WITH_MAGIC ?= 1
+
 # paths
 PREFIX ?= /usr
 MANPREFIX ?= ${PREFIX}/share/man
@@ -56,6 +59,11 @@ SQLITE_INC ?= $(shell pkg-config --cflags sqlite3)
 SQLITE_LIB ?= $(shell pkg-config --libs sqlite3)
 endif
 
+ifneq (${WITH_MAGIC},)
+MAGIC_INC ?=
+MAGIC_LIB ?= -lmagic
+endif
+
 INCS = ${GIRARA_INC} ${GTK_INC} ${GTHREAD_INC} ${GMODULE_INC}
 LIBS = ${GIRARA_LIB} ${GTK_LIB} ${GTHREAD_LIB} ${GMODULE_LIB} -lpthread -lm
 
diff --git a/document.c b/document.c
index ae85aa9..a8699e4 100644
--- a/document.c
+++ b/document.c
@@ -12,6 +12,9 @@
 #include <errno.h>
 #include <glib.h>
 #include <glib/gi18n.h>
+#ifdef WITH_MAGIC
+# include <magic.h>
+#endif /*WITH_MAGIC*/
 
 #include <girara/datastructures.h>
 #include <girara/utils.h>
@@ -518,6 +521,40 @@ zathura_document_get_information(zathura_document_t* document, zathura_error_t*
 static const gchar*
 guess_type(const char* path)
 {
+#ifdef WITH_MAGIC
+  {
+    const char *mime_type = NULL;
+    const gchar *content_type = NULL;
+    int flags =
+      MAGIC_MIME_TYPE |
+      MAGIC_SYMLINK |
+      MAGIC_NO_CHECK_APPTYPE |
+      MAGIC_NO_CHECK_CDF |
+      MAGIC_NO_CHECK_ELF |
+      MAGIC_NO_CHECK_ENCODING;
+    magic_t magic = magic_open(flags);
+    if (magic == NULL) {
+      girara_warning("failed creating the magic cookie\n");
+      return NULL;
+    }
+    if (magic_load(magic, NULL) < 0) {
+      girara_warning("failed loading the magic database: %s\n", magic_error(magic));
+      goto cleanup;
+    }
+    mime_type = (const gchar *)magic_file(magic, path);
+    if (mime_type == NULL) {
+      girara_warning("failed guessing filetype: %s\n", magic_error(magic));
+      goto cleanup;
+    }
+    content_type = g_strdup((const gchar *)mime_type);
+cleanup:
+    magic_close(magic);
+    if (content_type != NULL) {
+      return content_type;
+    }
+    /* else fallback to g_content_type_guess method */
+  }
+#endif /*WITH_MAGIC*/
   gboolean uncertain;
   const gchar* content_type = g_content_type_guess(path, NULL, 0, &uncertain);
   if (content_type == NULL) {