From aeb6fcbbbe818428207629455efb0580f5167123 Mon Sep 17 00:00:00 2001
From: raster <raster@7cbeb6ba-43b4-40fd-8cce-4c39aea84d33>
Date: Thu, 25 Aug 2011 10:01:22 +0000
Subject: [PATCH] =?utf8?q?From:=20J=C3=A9r=C3=A9my=20Zurcher=20<jeremy@asy?=
 =?utf8?q?nk.ch>=20Subject:=20[E-devel]=20patch=20:=20eina=5Fprefix=20+=20?=
 =?utf8?q?elementary=5Ftest?=
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please find attached a small patch for eina_prefix

it prevent segfault when for instance
no elm_app_compile_*_dir_set is called prior to elm_app_info_set

and another one for elementary/src/bin/test*.c which tends to replace
usage of PACKAGE_DATA_DIR with elm_app_data_dir_get



git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/eina@62795 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33
---
 ChangeLog             |  5 +++++
 src/lib/eina_prefix.c | 60 +++++++++++++++++++++++++++++++--------------------
 2 files changed, 42 insertions(+), 23 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 53e1b39..8e9cf08 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -126,3 +126,8 @@
 2011-08-03  Myungjae Lee
 
 	* Fix eina_share_common_del and eina_share_common_ref to release lock on failure.
+
+2011-08-25  Jérémy Zurcher
+
+	* Max eina_prefix more robust so it handles null bin and share
+        dirs better etc.
diff --git a/src/lib/eina_prefix.c b/src/lib/eina_prefix.c
index 84ba5bb..01163dc 100644
--- a/src/lib/eina_prefix.c
+++ b/src/lib/eina_prefix.c
@@ -103,7 +103,7 @@ struct _Eina_Prefix
    unsigned char env_used : 1;
 };
 
-#define STRDUP_REP(x, y) do { if (x) free(x); x = strdup(y); } while (0)
+#define STRDUP_REP(x, y) do { if (x) free(x); x = NULL; if (y) { x = strdup(y); } } while (0)
 #define IF_FREE_NULL(p) do { if (p) { free(p); p = NULL; } } while (0)
 #define DBG(fmt, args...) do { if (getenv("EINA_PREFIX_DEBUG")) fprintf(stderr, fmt, ##args); } while (0)
 
@@ -204,8 +204,11 @@ _try_argv(Eina_Prefix *pfx, const char *argv0)
 {
    char *path, *p, *cp, *s;
    int len, lenexe;
-   char buf[PATH_MAX], buf2[PATH_MAX], buf3[PATH_MAX];
+   char *buf, *buf2, *buf3;
 
+   buf = alloca(PATH_MAX);
+   buf2 = alloca(PATH_MAX);
+   buf3 = alloca(PATH_MAX);
    DBG("Try argv0 = %s\n", argv0);
    /* 1. is argv0 abs path? */
 #ifdef _WIN32
@@ -286,9 +289,10 @@ _try_argv(Eina_Prefix *pfx, const char *argv0)
 static int
 _get_env_var(char **var, const char *env, const char *prefix, const char *dir)
 {
-   char buf[PATH_MAX];
+   char *buf;
    const char *s = getenv(env);
 
+   buf = alloca(PATH_MAX);
    DBG("Try env var %s\n", env);
    if (s)
      {
@@ -353,7 +357,7 @@ eina_prefix_new(const char *argv0, void *symbol, const char *envprefix,
                 const char *pkg_data, const char *pkg_locale)
 {
    Eina_Prefix *pfx;
-   char *p, buf[4096], *tmp, *magic = NULL;
+   char *p, *buf, *tmp, *magic = NULL;
    struct stat st;
    const char *p1, *p2;
    const char *pkg_bin_p = NULL;
@@ -365,6 +369,7 @@ eina_prefix_new(const char *argv0, void *symbol, const char *envprefix,
    const char *datadir = "share";
    const char *localedir = "share";
 
+   buf = alloca(PATH_MAX);
    DBG("EINA PREFIX: argv0=%s, symbol=%p, magicsharefile=%s, envprefix=%s\n", argv0, symbol, magicsharefile, envprefix);
    pfx = calloc(1, sizeof(Eina_Prefix));
    if (!pfx) return NULL;
@@ -428,32 +433,41 @@ eina_prefix_new(const char *argv0, void *symbol, const char *envprefix,
     * all with a common prefix that can be relocated
     */
    /* 1. check last common char in bin and lib strings */
-   for (p1 = pkg_bin, p2 = pkg_lib; *p1 && *p2; p1++, p2++)
+   if ( pkg_bin && pkg_lib )
      {
-        if (*p1 != *p2)
-          {
-             pkg_bin_p = p1;
-             pkg_lib_p = p2;
-             break;
-          }
+       for (p1 = pkg_bin, p2 = pkg_lib; *p1 && *p2; p1++, p2++)
+         {
+           if (*p1 != *p2)
+             {
+               pkg_bin_p = p1;
+               pkg_lib_p = p2;
+               break;
+             }
+         }
      }
    /* 1. check last common char in bin and data strings */
-   for (p1 = pkg_bin, p2 = pkg_data; *p1 && *p2; p1++, p2++)
+   if (pkg_bin && pkg_data)
      {
-        if (*p1 != *p2)
-          {
-             pkg_data_p = p2;
-             break;
-          }
+       for (p1 = pkg_bin, p2 = pkg_data; *p1 && *p2; p1++, p2++)
+         {
+           if (*p1 != *p2)
+             {
+               pkg_data_p = p2;
+               break;
+             }
+         }
      }
    /* 1. check last common char in bin and locale strings */
-   for (p1 = pkg_bin, p2 = pkg_locale; *p1 && *p2; p1++, p2++)
+   if (pkg_bin && pkg_locale)
      {
-        if (*p1 != *p2)
-          {
-             pkg_locale_p = p2;
-             break;
-          }
+       for (p1 = pkg_bin, p2 = pkg_locale; *p1 && *p2; p1++, p2++)
+         {
+           if (*p1 != *p2)
+             {
+               pkg_locale_p = p2;
+               break;
+             }
+         }
      }
    /* 2. if all the common string offsets match we compiled with a common prefix */
    if (((pkg_bin_p - pkg_bin) == (pkg_lib_p - pkg_lib))
-- 
2.7.4