From c64b35d2843e9d2d03775aee59c1b17a05b1d3ad Mon Sep 17 00:00:00 2001
From: pgen <p.gen.progs@gmail.com>
Date: Mon, 12 Jun 2023 23:25:04 +0200
Subject: Rework xstrdup and xstrndup

smenu can now be compiled without warning when using the following options:
-std=c99 -Werror=implicit-function-declaration -Werror=implicit-int
-Werror=int-conversion -Werror=old-style-definition
---
 config.h.in  |  6 ------
 configure    | 12 ------------
 configure.ac |  2 +-
 xmalloc.c    | 39 ++++++++++++++++-----------------------
 4 files changed, 17 insertions(+), 42 deletions(-)

diff --git a/config.h.in b/config.h.in
index c249090..47cb3d3 100644
--- a/config.h.in
+++ b/config.h.in
@@ -62,18 +62,12 @@
 /* Define to 1 if you have the `strchr' function. */
 #undef HAVE_STRCHR
 
-/* Define to 1 if you have the `strdup' function. */
-#undef HAVE_STRDUP
-
 /* Define to 1 if you have the <strings.h> header file. */
 #undef HAVE_STRINGS_H
 
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
-/* Define to 1 if you have the `strndup' function. */
-#undef HAVE_STRNDUP
-
 /* Define to 1 if you have the `strrchr' function. */
 #undef HAVE_STRRCHR
 
diff --git a/configure b/configure
index 0fbc221..417f75d 100755
--- a/configure
+++ b/configure
@@ -6270,18 +6270,6 @@ then :
   printf "%s\n" "#define HAVE_STRCASECMP 1" >>confdefs.h
 
 fi
-ac_fn_c_check_func "$LINENO" "strdup" "ac_cv_func_strdup"
-if test "x$ac_cv_func_strdup" = xyes
-then :
-  printf "%s\n" "#define HAVE_STRDUP 1" >>confdefs.h
-
-fi
-ac_fn_c_check_func "$LINENO" "strndup" "ac_cv_func_strndup"
-if test "x$ac_cv_func_strndup" = xyes
-then :
-  printf "%s\n" "#define HAVE_STRNDUP 1" >>confdefs.h
-
-fi
 
 
 
diff --git a/configure.ac b/configure.ac
index 1455f30..2444308 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,7 +42,7 @@ AC_TYPE_SIZE_T
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 AC_CHECK_FUNCS([mblen memset nl_langinfo pathconf regcomp setlocale])
-AC_CHECK_FUNCS([strchr strrchr strspn strcasecmp strdup strndup])
+AC_CHECK_FUNCS([strchr strrchr strspn strcasecmp])
 
 AC_CANONICAL_HOST
 # OS-specific tests
diff --git a/xmalloc.c b/xmalloc.c
index 2f148f5..cd2ffd6 100644
--- a/xmalloc.c
+++ b/xmalloc.c
@@ -126,25 +126,21 @@ xrealloc(void * p, size_t size)
 /* Displays an error message and exits gracefully if an error occurs. */
 /* ================================================================== */
 char *
-xstrdup(const char * p)
+xstrdup(const char * str)
 {
-  char * allocated;
+  char * p;
 
-#ifdef HAVE_STRDUP
-  allocated = strdup(p);
+  p = malloc(strlen(str) + 1);
 
-  if (allocated == NULL)
+  if (p == NULL)
   {
-    fprintf(stderr, "Error: Insufficient memory for strdup.\n");
-
+    fprintf(stderr, "Error: Insufficient memory for xstrdup.\n");
     exit(EXIT_FAILURE);
   }
-#else
-  allocated = xmalloc(strlen(p) + 1);
-  strcpy(allocated, p);
-#endif
 
-  return allocated;
+  strcpy(p, str);
+
+  return p;
 }
 
 /* ================================================================== */
@@ -156,26 +152,23 @@ char *
 xstrndup(const char * str, size_t len)
 {
   char * p;
+  size_t l;
 
-#ifdef HAVE_STRNDUP
-  p = strndup(str, len);
+  p = memchr(str, '\0', len);
+
+  if (p)
+    len = p - str;
+
+  p = malloc(len + 1);
 
   if (p == NULL)
   {
-    fprintf(stderr, "Error: Insufficient memory for strndup.\n");
-
+    fprintf(stderr, "Error: Insufficient memory for xstrndup.\n");
     exit(EXIT_FAILURE);
   }
-#else
-  p = memchr(str, '\0', len);
 
-  if (p)
-    len = p - str;
-
-  p = xmalloc(len + 1);
   memcpy(p, str, len);
   p[len] = '\0';
-#endif
 
   return p;
 }
-- 
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