Assume freestanding C89 headers, string.h, stdlib.h.

10 files changed, 35 insertions, 117 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b0fb0f213ab..d91837877e1 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,17 @@
+2011-07-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Assume freestanding C89 headers, string.h, stdlib.h.
+        * data.c, doprnt.c, floatfns.c, print.c:
+        Include float.h unconditionally.
+        * gmalloc.c: Assume C89-at-least behavior for preprocessor,
+        limits.h, stddef.h, string.h.  Use memset instead of 'flood'.
+        * regex.c: Likewise for stddef.h, string.h.
+        (ISASCII): Remove; can assume it returns 1 now.  All uses removed.
+        * s/aix4-2.h (HAVE_STRING_H): Remove obsolete undef.
+        * s/ms-w32.h (HAVE_LIMITS_H, HAVE_STRING_H, HAVE_STDLIB_H)
+        (STDC_HEADERS): Remove obsolete defines.
+        * sysdep.c: Include limits.h unconditionally.
+
 2011-07-06  Paul Eggert  <eggert@cs.ucla.edu>
 
         Assume support for memcmp, memcpy, memmove, memset.
diff --git a/src/data.c b/src/data.c
index 6b4ea32ac9e..eb3f870b97c 100644
--- a/src/data.c
+++ b/src/data.c
@@ -35,10 +35,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "termhooks.h"  /* For FRAME_KBOARD reference in y-or-n-p.  */
 #include "font.h"
 
-#ifdef STDC_HEADERS
 #include <float.h>
-#endif
-
 /* If IEEE_FLOATING_POINT isn't defined, default it from FLT_*.  */
 #ifndef IEEE_FLOATING_POINT
 #if (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \
diff --git a/src/doprnt.c b/src/doprnt.c
index 195598c07ea..0632046525a 100644
--- a/src/doprnt.c
+++ b/src/doprnt.c
@@ -102,13 +102,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdio.h>
 #include <ctype.h>
 #include <setjmp.h>
-
-#ifdef STDC_HEADERS
 #include <float.h>
-#endif
-
 #include <unistd.h>
-
 #include <limits.h>
 
 #include "lisp.h"
diff --git a/src/floatfns.c b/src/floatfns.c
index b5c8b4af5c3..850eb9f1bcc 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -53,10 +53,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "lisp.h"
 #include "syssignal.h"
 
-#if STDC_HEADERS
 #include <float.h>
-#endif
-
 /* If IEEE_FLOATING_POINT isn't defined, default it from FLT_*. */
 #ifndef IEEE_FLOATING_POINT
 #if (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \
diff --git a/src/gmalloc.c b/src/gmalloc.c
index 4f27ea3079a..fa4aa1fdf6a 100644
--- a/src/gmalloc.c
+++ b/src/gmalloc.c
@@ -41,28 +41,13 @@ Fifth Floor, Boston, MA 02110-1301, USA.
 #define USE_PTHREAD
 #endif
 
-#if ((defined __cplusplus || (defined (__STDC__) && __STDC__) \
-      || defined STDC_HEADERS || defined PROTOTYPES))
 #undef  PP
 #define PP(args)        args
 #undef  __ptr_t
 #define __ptr_t         void *
-#else /* Not C++ or ANSI C.  */
-#undef  PP
-#define PP(args)        ()
-#undef  __ptr_t
-#define __ptr_t         char *
-#endif /* C++ or ANSI C.  */
 
 #include <string.h>
-
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
-#ifndef CHAR_BIT
-#define CHAR_BIT        8
-#endif
-
 #include <unistd.h>
 
 #ifdef USE_PTHREAD
@@ -77,26 +62,9 @@ extern "C"
 {
 #endif
 
-#ifdef STDC_HEADERS
 #include <stddef.h>
 #define __malloc_size_t         size_t
 #define __malloc_ptrdiff_t      ptrdiff_t
-#else
-#ifdef __GNUC__
-#include <stddef.h>
-#ifdef __SIZE_TYPE__
-#define __malloc_size_t         __SIZE_TYPE__
-#endif
-#endif
-#ifndef __malloc_size_t
-#define __malloc_size_t         unsigned int
-#endif
-#define __malloc_ptrdiff_t      int
-#endif
-
-#ifndef NULL
-#define NULL    0
-#endif
 
 
 /* Allocate SIZE bytes of memory.  */
@@ -1881,22 +1849,6 @@ struct hdr
     unsigned long int magic;    /* Magic number to check header integrity.  */
   };
 
-#if     defined(_LIBC) || defined(STDC_HEADERS) || defined(USG)
-#define flood memset
-#else
-static void flood (__ptr_t, int, __malloc_size_t);
-static void
-flood (ptr, val, size)
-     __ptr_t ptr;
-     int val;
-     __malloc_size_t size;
-{
-  char *cp = ptr;
-  while (size--)
-    *cp++ = val;
-}
-#endif
-
 static enum mcheck_status checkhdr (const struct hdr *);
 static enum mcheck_status
 checkhdr (hdr)
@@ -1935,7 +1887,7 @@ freehook (ptr)
       hdr = ((struct hdr *) ptr) - 1;
       checkhdr (hdr);
       hdr->magic = MAGICFREE;
-      flood (ptr, FREEFLOOD, hdr->size);
+      memset (ptr, FREEFLOOD, hdr->size);
     }
   else
     hdr = NULL;
@@ -1961,7 +1913,7 @@ mallochook (size)
   hdr->size = size;
   hdr->magic = MAGICWORD;
   ((char *) &hdr[1])[size] = MAGICBYTE;
-  flood ((__ptr_t) (hdr + 1), MALLOCFLOOD, size);
+  memset ((__ptr_t) (hdr + 1), MALLOCFLOOD, size);
   return (__ptr_t) (hdr + 1);
 }
 
@@ -1981,7 +1933,7 @@ reallochook (ptr, size)
 
       checkhdr (hdr);
       if (size < osize)
-        flood ((char *) ptr + size, FREEFLOOD, osize - size);
+        memset ((char *) ptr + size, FREEFLOOD, osize - size);
     }
 
   __free_hook = old_free_hook;
@@ -1998,7 +1950,7 @@ reallochook (ptr, size)
   hdr->magic = MAGICWORD;
   ((char *) &hdr[1])[size] = MAGICBYTE;
   if (size > osize)
-    flood ((char *) (hdr + 1) + osize, MALLOCFLOOD, size - osize);
+    memset ((char *) (hdr + 1) + osize, MALLOCFLOOD, size - osize);
   return (__ptr_t) (hdr + 1);
 }
 
diff --git a/src/print.c b/src/print.c
index 14b4326bb6f..f1907a31465 100644
--- a/src/print.c
+++ b/src/print.c
@@ -46,10 +46,7 @@ static Lisp_Object Qtemp_buffer_setup_hook;
 static Lisp_Object Qfloat_output_format;
 
 #include <math.h>
-
-#if STDC_HEADERS
 #include <float.h>
-#endif
 #include <ftoastr.h>
 
 /* Default to values appropriate for IEEE floating point.  */
diff --git a/src/regex.c b/src/regex.c
index f514b603488..d347d274819 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -37,9 +37,9 @@
 # include <config.h>
 #endif
 
-#if defined STDC_HEADERS && !defined emacs
-# include <stddef.h>
-#else
+#include <stddef.h>
+
+#ifdef emacs
 /* We need this for `regex.h', and perhaps for the Emacs include files.  */
 # include <sys/types.h>
 #endif
@@ -346,25 +346,6 @@ enum syntaxcode { Swhitespace = 0, Sword = 1, Ssymbol = 2 };
 
 #else /* not emacs */
 
-/* Jim Meyering writes:
-
-   "... Some ctype macros are valid only for character codes that
-   isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
-   using /bin/cc or gcc but without giving an ansi option).  So, all
-   ctype uses should be through macros like ISPRINT...  If
-   STDC_HEADERS is defined, then autoconf has verified that the ctype
-   macros don't need to be guarded with references to isascii. ...
-   Defining isascii to 1 should let any compiler worth its salt
-   eliminate the && through constant folding."
-   Solaris defines some of these symbols so we must undefine them first.  */
-
-# undef ISASCII
-# if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII)
-#  define ISASCII(c) 1
-# else
-#  define ISASCII(c) isascii(c)
-# endif
-
 /* 1 if C is an ASCII character.  */
 # define IS_REAL_ASCII(c) ((c) < 0200)
 
@@ -372,27 +353,28 @@ enum syntaxcode { Swhitespace = 0, Sword = 1, Ssymbol = 2 };
 # define ISUNIBYTE(c) 1
 
 # ifdef isblank
-#  define ISBLANK(c) (ISASCII (c) && isblank (c))
+#  define ISBLANK(c) isblank (c)
 # else
 #  define ISBLANK(c) ((c) == ' ' || (c) == '\t')
 # endif
 # ifdef isgraph
-#  define ISGRAPH(c) (ISASCII (c) && isgraph (c))
+#  define ISGRAPH(c) isgraph (c)
 # else
-#  define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
+#  define ISGRAPH(c) (isprint (c) && !isspace (c))
 # endif
 
+/* Solaris defines ISPRINT so we must undefine it first.  */
 # undef ISPRINT
-# define ISPRINT(c) (ISASCII (c) && isprint (c))
-# define ISDIGIT(c) (ISASCII (c) && isdigit (c))
-# define ISALNUM(c) (ISASCII (c) && isalnum (c))
-# define ISALPHA(c) (ISASCII (c) && isalpha (c))
-# define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
-# define ISLOWER(c) (ISASCII (c) && islower (c))
-# define ISPUNCT(c) (ISASCII (c) && ispunct (c))
-# define ISSPACE(c) (ISASCII (c) && isspace (c))
-# define ISUPPER(c) (ISASCII (c) && isupper (c))
-# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
+# define ISPRINT(c) isprint (c)
+# define ISDIGIT(c) isdigit (c)
+# define ISALNUM(c) isalnum (c)
+# define ISALPHA(c) isalpha (c)
+# define ISCNTRL(c) iscntrl (c)
+# define ISLOWER(c) islower (c)
+# define ISPUNCT(c) ispunct (c)
+# define ISSPACE(c) isspace (c)
+# define ISUPPER(c) isupper (c)
+# define ISXDIGIT(c) isxdigit (c)
 
 # define ISWORD(c) ISALPHA(c)
 
@@ -439,10 +421,6 @@ init_syntax_once (void)
 
 #endif /* not emacs */
 
-#ifndef NULL
-# define NULL (void *)0
-#endif
-
 /* We remove any previous definition of `SIGN_EXTEND_CHAR',
    since ours (we hope) works properly with all combinations of
    machines, compilers, `char' and `unsigned char' argument types.
diff --git a/src/s/aix4-2.h b/src/s/aix4-2.h
index c2715fffe01..b44bd0308a3 100644
--- a/src/s/aix4-2.h
+++ b/src/s/aix4-2.h
@@ -47,11 +47,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* AIX doesn't define this.  */
 #define unix 1
 
-/* string.h defines rindex as a macro, at least with native cc, so we
-   lose declaring char * rindex without this.
-   It is just a guess which versions of AIX need this definition.  */
-#undef HAVE_STRING_H
-
 /* Perry Smith <pedz@ddivt1.austin.ibm.com> says these are correct.  */
 #define SIGNALS_VIA_CHARACTERS
 #define CLASH_DETECTION
diff --git a/src/s/ms-w32.h b/src/s/ms-w32.h
index bf6cc66798c..813c3cef115 100644
--- a/src/s/ms-w32.h
+++ b/src/s/ms-w32.h
@@ -111,11 +111,7 @@ struct sigaction {
 #undef  HAVE_UTIME_H
 #undef  HAVE_LINUX_VERSION_H
 #undef  HAVE_SYS_SYSTEMINFO_H
-#define HAVE_LIMITS_H 1
-#define HAVE_STRING_H 1
-#define HAVE_STDLIB_H 1
 #define HAVE_PWD_H 1
-#define STDC_HEADERS 1
 #define TIME_WITH_SYS_TIME 1
 
 #define HAVE_GETTIMEOFDAY 1
@@ -386,4 +382,3 @@ extern void _DebPrint (const char *fmt, ...);
 
 
 /* ============================================================ */
-
diff --git a/src/sysdep.c b/src/sysdep.c
index f157baf3e76..155d577ebfa 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -26,9 +26,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <pwd.h>
 #include <grp.h>
 #endif /* HAVE_PWD_H */
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif /* HAVE_LIMITS_H */
 #include <unistd.h>
 
 #include <allocator.h>