begin namespace-cleanup of standard C headers

include/bits/limits.h

+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
 #define PIPE_BUF 4096
 #define PAGESIZE 4096
 #define PAGE_SIZE PAGESIZE
@@ -10,9 +12,9 @@
 #define ARG_MAX 131072
 #define IOV_MAX 1024
 #define SYMLOOP_MAX 40
-
 #define WORD_BIT 32
 #define LONG_BIT 32
+#endif
 
 #define SHRT_MIN  (-1-0x7fff)
 #define SHRT_MAX  0x7fff
@@ -29,4 +31,3 @@
 #define LLONG_MIN  (-1-0x7fffffffffffffffLL)
 #define LLONG_MAX  0x7fffffffffffffffLL
 #define ULLONG_MAX 0xffffffffffffffffULL
-

include/bits/stdio.h

@@ -5,6 +5,13 @@
 #define TMP_MAX 10000
 
 #define L_cuserid 20
-#define L_ctermid 20
 #define L_tmpnam 20
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#define L_ctermid 20
+#endif
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
 #define P_tmpdir "/tmp"
+#endif

include/limits.h

@@ -13,9 +13,13 @@
 #define UCHAR_MAX 255
 #define CHAR_MIN (-128)
 #define CHAR_MAX 127
-#define SSIZE_MAX LONG_MAX
 
 #define MB_LEN_MAX 4
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+
+#define SSIZE_MAX LONG_MAX
 #define TZNAME_MAX 6
 #define TTY_NAME_MAX 20
 #define HOST_NAME_MAX 255
@@ -100,3 +104,5 @@
 #define _XOPEN_PATH_MAX         1024
 
 #endif
+
+#endif

include/stdio.h

@@ -8,8 +8,12 @@ extern "C" {
 #define __NEED_FILE
 #define __NEED_va_list
 #define __NEED_size_t
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
 #define __NEED_ssize_t
 #define __NEED_off_t
+#endif
 
 #include <bits/alltypes.h>
 
@@ -50,26 +54,19 @@ extern FILE *const stderr;
 #define stderr (stderr)
 
 FILE *fopen(const char *, const char *);
-FILE *fdopen(int, const char *);
 FILE *freopen(const char *, const char *, FILE *);
 int fclose(FILE *);
 
-FILE *popen(const char *, const char *);
-int pclose(FILE *);
-
 int remove(const char *);
 int rename(const char *, const char *);
 
-int fileno(FILE *);
 int feof(FILE *);
 int ferror(FILE *);
 int fflush(FILE *);
 void clearerr(FILE *);
 
 int fseek(FILE *, long, int);
-int fseeko(FILE *, off_t, int);
 long ftell(FILE *);
-off_t ftello(FILE *);
 void rewind(FILE *);
 
 int fgetpos(FILE *, fpos_t *);
@@ -103,9 +100,6 @@ int vfprintf(FILE *, const char *, va_list);
 int vsprintf(char *, const char *, va_list);
 int vsnprintf(char *, size_t, const char *, va_list);
 
-int dprintf(int, const char *, ...);
-int vdprintf(int, const char *, va_list);
-
 int scanf(const char *, ...);
 int fscanf(FILE *, const char *, ...);
 int sscanf(const char *, const char *, ...);
@@ -115,6 +109,22 @@ int vsscanf(const char *, const char *, va_list);
 
 void perror(const char *);
 
+int setvbuf(FILE *, char *, int, size_t);
+void setbuf(FILE *, char *);
+
+char *tmpnam(char *);
+FILE *tmpfile(void);
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+FILE *fdopen(int, const char *);
+FILE *popen(const char *, const char *);
+int pclose(FILE *);
+int fileno(FILE *);
+int fseeko(FILE *, off_t, int);
+off_t ftello(FILE *);
+int dprintf(int, const char *, ...);
+int vdprintf(int, const char *, va_list);
 void flockfile(FILE *);
 int ftrylockfile(FILE *);
 void funlockfile(FILE *);
@@ -122,20 +132,21 @@ int getc_unlocked(FILE *);
 int getchar_unlocked(void);
 int putc_unlocked(int, FILE *);
 int putchar_unlocked(int);
+ssize_t getdelim(char **, size_t *, int, FILE *);
+ssize_t getline(char **, size_t *, FILE *);
+int renameat(int, const char *, int, const char *);
+char *ctermid(char *);
+#endif
 
-int setvbuf(FILE *, char *, int, size_t);
-void setbuf(FILE *, char *);
 
-char *tmpnam(char *);
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
 char *tempnam(const char *, const char *);
-FILE *tmpfile(void);
-
-char *ctermid(char *);
-
-ssize_t getdelim(char **, size_t *, int, FILE *);
-ssize_t getline(char **, size_t *, FILE *);
+#endif
 
-int renameat(int, const char *, int, const char *);
+#if defined(_GNU_SOURCE)
+#undef off64_t
+#define off64_t off_t
+#endif
 
 #ifdef __cplusplus
 }

include/stdlib.h

@@ -28,59 +28,26 @@ long double strtold (const char *, char **);
 
 long strtol (const char *, char **, int);
 unsigned long strtoul (const char *, char **, int);
-
 long long strtoll (const char *, char **, int);
 unsigned long long strtoull (const char *, char **, int);
 
-char *l64a (long);
-long a64l (const char *);
-
-long int random (void);
-void srandom (unsigned int);
-char *initstate (unsigned int, char *, size_t);
-char *setstate (char *);
-
 int rand (void);
 void srand (unsigned);
-int rand_r (unsigned *);
-
-double drand48 (void);
-double erand48 (unsigned short [3]);
-long int lrand48 (void);
-long int nrand48 (unsigned short [3]);
-long mrand48 (void);
-long jrand48 (unsigned short [3]);
-void srand48 (long);
-unsigned short *seed48 (unsigned short [3]);
-void lcong48 (unsigned short [7]);
 
 void *malloc (size_t);
 void *calloc (size_t, size_t);
 void *realloc (void *, size_t);
 void free (void *);
-void *valloc (size_t);
-int posix_memalign (void **, size_t, size_t);
 
 void abort (void);
 int atexit (void (*) (void));
 void exit (int);
 void _Exit (int);
 
-
 char *getenv (const char *);
-int putenv (char *);
-int setenv (const char *, const char *, int);
-int unsetenv (const char *);
-
-
-char *mktemp (char *);
-int mkstemp (char *);
 
 int system (const char *);
 
-
-char *realpath (const char *, char *);
-
 void *bsearch (const void *, const void *, size_t, size_t, int (*)(const void *, const void *));
 void qsort (void *, size_t, size_t, int (*)(const void *, const void *));
 
@@ -89,14 +56,12 @@ long labs (long);
 long long llabs (long long);
 
 typedef struct { int quot, rem; } div_t;
-extern div_t div (int, int);
-
 typedef struct { long quot, rem; } ldiv_t;
-ldiv_t ldiv (long, long);
-
 typedef struct { long long quot, rem; } lldiv_t;
-lldiv_t lldiv (long long, long long);
 
+div_t div (int, int);
+ldiv_t ldiv (long, long);
+lldiv_t lldiv (long long, long long);
 
 int mblen (const char *, size_t);
 int mbtowc (wchar_t *, const char *, size_t);
@@ -104,23 +69,63 @@ int wctomb (char *, wchar_t);
 size_t mbstowcs (wchar_t *, const char *, size_t);
 size_t wcstombs (char *, const wchar_t *, size_t);
 
+#define MB_CUR_MAX 4
+
+#define RAND_MAX (0x7fffffff)
+
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+
+#ifndef WEXITSTATUS
+#include <bits/wexitstatus.h>
+#endif
+
+#define EXIT_FAILURE 1
+#define EXIT_SUCCESS 0
+
+int posix_memalign (void **, size_t, size_t);
+int setenv (const char *, const char *, int);
+int unsetenv (const char *);
+int mkstemp (char *);
+char *mkdtemp (char *);
 int getsubopt (char **, char *const *, char **);
+int rand_r (unsigned *);
 
-void setkey (const char *);
+#endif
 
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+int putenv (char *);
 int posix_openpt (int);
 int grantpt (int);
 int unlockpt (int);
 char *ptsname (int);
+char *realpath (const char *, char *);
+char *l64a (long);
+long a64l (const char *);
+void setkey (const char *);
+long int random (void);
+void srandom (unsigned int);
+char *initstate (unsigned int, char *, size_t);
+char *setstate (char *);
+double drand48 (void);
+double erand48 (unsigned short [3]);
+long int lrand48 (void);
+long int nrand48 (unsigned short [3]);
+long mrand48 (void);
+long jrand48 (unsigned short [3]);
+void srand48 (long);
+unsigned short *seed48 (unsigned short [3]);
+void lcong48 (unsigned short [7]);
+#endif
 
-#define MB_CUR_MAX 4
-
-#define RAND_MAX (0x7fffffff)
-
-#define EXIT_FAILURE 1
-#define EXIT_SUCCESS 0
+#if defined(_GNU_SOURCE)
+char *mktemp (char *);
+void *valloc (size_t);
+void *memalign(size_t, size_t);
+#endif
 
-#include <bits/wexitstatus.h>
 
 #ifdef __cplusplus
 }

src/temp/mkdtemp.c

+#define _GNU_SOURCE
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>

src/temp/mkstemp.c

+#define _GNU_SOURCE
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>