12 files changed, 25 insertions, 23 deletions
diff --git a/src/string/strcat.c b/src/string/strcat.c
index ed10cc2..2205f39 100644
--- a/src/string/strcat.c
+++ b/src/string/strcat.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
diff --git a/src/string/strchr.c b/src/string/strchr.c
index 21345d4..2b49c2e 100644
--- a/src/string/strchr.c
+++ b/src/string/strchr.c
@@ -16,7 +16,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
+
+
+# pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
 
 
 
@@ -31,9 +33,10 @@
  */
 void* memchr(const void* segment, int c, size_t size)
 {
+  char* s = segment;
   while (size--)
-    if (*segment++ == c)
-      return segment - 1;
+    if (*s++ == c)
+      return s - 1;
   return NULL;
 }
 
@@ -50,9 +53,10 @@ void* memchr(const void* segment, int c, size_t size)
  */
 void* rawmemchr(const void* segment, int c)
 {
+  char* s = segment;
   for (;;)
-    if (*segment++ == c)
-      return segment - 1;
+    if (*s++ == c)
+      return s - 1;
 }
 
 
@@ -71,9 +75,10 @@ void* rawmemchr(const void* segment, int c)
  */
 void* memrchr(const void* segment, int c, size_t size)
 {
+  char* s = segment;
   while (size--)
-    if (segment[size] == c)
-      return segment + size;
+    if (s[size] == c)
+      return s + size;
   return NULL;
 }
 
diff --git a/src/string/strcmp.c b/src/string/strcmp.c
index 966bb06..f626f91 100644
--- a/src/string/strcmp.c
+++ b/src/string/strcmp.c
@@ -17,7 +17,6 @@
  */
 #include <string.h>
 #include <strings.h>
-#include <stddef.h>
 #include <inttypes.h>
 #include <ctype.h>
 
diff --git a/src/string/strcpy.c b/src/string/strcpy.c
index dfbdc75..17dd339 100644
--- a/src/string/strcpy.c
+++ b/src/string/strcpy.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
@@ -93,7 +92,7 @@ char* strstrcpy(char* restrict whither, const char* restrict whence, const char*
 {
   const char* stop = str == NULL ? NULL : strstr(whence, str);
   size_t n = stop == NULL ? strlen(whence) : (size_t)(stop - whence);
-  char* r = stop == NULL ? NULL ? whither + n;
+  char* r = stop == NULL ? NULL : (whither + n);
   memcpy(whither, whence, n);
   whither[n] = 0;
   return r;
diff --git a/src/string/strdup.c b/src/string/strdup.c
index c65970e..c23548b 100644
--- a/src/string/strdup.c
+++ b/src/string/strdup.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
diff --git a/src/string/strerror.c b/src/string/strerror.c
index 7366f63..87f3261 100644
--- a/src/string/strerror.c
+++ b/src/string/strerror.c
@@ -16,7 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
+#include <errno.h>
 
 
 
diff --git a/src/string/strfry.c b/src/string/strfry.c
index f020202..cf8d643 100644
--- a/src/string/strfry.c
+++ b/src/string/strfry.c
@@ -34,13 +34,16 @@
 char* strfry(char* anagram)
 {
   size_t i, j;
+  int r;
   char t;
   if (anagram == NULL)
     return NULL;
   for (i = strlen(anagram); --i;)
     {
-      j = (int)((double)rand() / (RAND_MAX + 1));
+      r = rand();
+      j = (int)((double)r / (RAND_MAX + 1));
       t = anagram[i], anagram[i] = anagram[j], anagram[j] = t;
     }
+  return anagram;
 }
 
diff --git a/src/string/strlen.c b/src/string/strlen.c
index 7023cc0..7a08fa0 100644
--- a/src/string/strlen.c
+++ b/src/string/strlen.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
diff --git a/src/string/strmove.c b/src/string/strmove.c
index 86298cf..596822a 100644
--- a/src/string/strmove.c
+++ b/src/string/strmove.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
@@ -97,7 +96,7 @@ char* strstrmove(char* whither, const char* whence, const char* restrict str)
 {
   const char* stop = str == NULL ? NULL : strstr(whence, str);
   size_t n = stop == NULL ? strlen(whence) : (size_t)(stop - whence);
-  char* r = stop == NULL ? NULL ? whither + n;
+  char* r = stop == NULL ? NULL : (whither + n);
   memmove(whither, whence, n);
   whither[n] = 0;
   return r;
diff --git a/src/string/strspn.c b/src/string/strspn.c
index cf82529..3facfd8 100644
--- a/src/string/strspn.c
+++ b/src/string/strspn.c
@@ -16,7 +16,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
+
+
+# pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
 
 
 
@@ -59,7 +61,7 @@ size_t strcspn(const char* string, const char* stopset)
   char c;
   const char* s = string;
   memset(set, 0, 256);
-  while ((c = *skipset++))
+  while ((c = *stopset++))
     set[(size_t)c] = 1;
   while ((c = *s++))
     if (!set[(size_t)c])
@@ -86,7 +88,7 @@ char* stpbrk(const char* string, const char* stopset)
   char c;
   const char* s = string;
   memset(set, 0, 256);
-  while ((c = *skipset++))
+  while ((c = *stopset++))
     set[(size_t)c] = 1;
   while ((c = *s++))
     if (!set[(size_t)c])
diff --git a/src/string/strstr.c b/src/string/strstr.c
index a7e490a..68cc647 100644
--- a/src/string/strstr.c
+++ b/src/string/strstr.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 #include <inttypes.h>
 
 
diff --git a/src/string/strtok.c b/src/string/strtok.c
index 04668fc..1520431 100644
--- a/src/string/strtok.c
+++ b/src/string/strtok.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <string.h>
-#include <stddef.h>
 
 
 
@@ -102,7 +101,7 @@ char* strsep(char** restrict string, const char* restrict delimiters)
   if (r == NULL)
     return NULL;
   
-  next = stpbrk(string, delimiters);
+  next = stpbrk(r, delimiters);
   if (next != NULL)
     *next++ = 0;
   *string = next;