clean up stdio_impl.h

this header evolved to facilitate the extremely lazy practice of
omitting explicit includes of the necessary headers in individual
stdio source files; not only was this sloppy, but it also increased
build time.

now, stdio_impl.h is only including the headers it needs for its own
use; any further headers needed by source files are included directly
where needed.

41 files changed, 93 insertions, 19 deletions

diff --git a/src/internal/floatscan.c b/src/internal/floatscan.c
index 08251213..f6e331d4 100644
--- a/src/internal/floatscan.c
+++ b/src/internal/floatscan.c
@@ -4,6 +4,7 @@
 #include <float.h>
 #include <limits.h>
 #include <errno.h>
+#include <ctype.h>
 
 #include "shgetc.h"
 #include "floatscan.h"
diff --git a/src/internal/intscan.c b/src/internal/intscan.c
index 178cdf0d..69350efa 100644
--- a/src/internal/intscan.c
+++ b/src/internal/intscan.c
@@ -1,5 +1,6 @@
 #include <limits.h>
 #include <errno.h>
+#include <ctype.h>
 #include "shgetc.h"
 
 /* Lookup table for digit values. -1==255>=36 -> invalid */
diff --git a/src/internal/stdio_impl.h b/src/internal/stdio_impl.h
index e9045f27..c9d20fac 100644
--- a/src/internal/stdio_impl.h
+++ b/src/internal/stdio_impl.h
@@ -2,23 +2,6 @@
 #define _STDIO_IMPL_H
 
 #include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <stdarg.h>
-#include <string.h>
-#include <inttypes.h>
-#include <wchar.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <errno.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-#include <ctype.h>
-#include <sys/wait.h>
-#include <math.h>
-#include <float.h>
-#include <sys/uio.h>
 #include "syscall.h"
 #include "libc.h"
 
diff --git a/src/stdio/__fdopen.c b/src/stdio/__fdopen.c
index df6ed71d..59690f6d 100644
--- a/src/stdio/__fdopen.c
+++ b/src/stdio/__fdopen.c
@@ -1,4 +1,10 @@
 #include "stdio_impl.h"
+#include <stdlib.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
 
 FILE *__fdopen(int fd, const char *mode)
 {
diff --git a/src/stdio/__fopen_rb_ca.c b/src/stdio/__fopen_rb_ca.c
index a1b1b3b6..9202c8ce 100644
--- a/src/stdio/__fopen_rb_ca.c
+++ b/src/stdio/__fopen_rb_ca.c
@@ -1,4 +1,6 @@
 #include "stdio_impl.h"
+#include <fcntl.h>
+#include <string.h>
 
 FILE *__fopen_rb_ca(const char *filename, FILE *f, unsigned char *buf, size_t len)
 {
diff --git a/src/stdio/__stdio_read.c b/src/stdio/__stdio_read.c
index c99ca9a9..05e56f92 100644
--- a/src/stdio/__stdio_read.c
+++ b/src/stdio/__stdio_read.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <sys/uio.h>
 #include <pthread.h>
 
 static void cleanup(void *p)
diff --git a/src/stdio/__stdio_write.c b/src/stdio/__stdio_write.c
index cef7bbdc..e52e91ae 100644
--- a/src/stdio/__stdio_write.c
+++ b/src/stdio/__stdio_write.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <sys/uio.h>
 #include <pthread.h>
 
 static void cleanup(void *p)
diff --git a/src/stdio/__stdout_write.c b/src/stdio/__stdout_write.c
index 0cf71236..200fe2c9 100644
--- a/src/stdio/__stdout_write.c
+++ b/src/stdio/__stdout_write.c
@@ -1,4 +1,6 @@
 #include "stdio_impl.h"
+#include <termios.h>
+#include <sys/ioctl.h>
 
 size_t __stdout_write(FILE *f, const unsigned char *buf, size_t len)
 {
diff --git a/src/stdio/__string_read.c b/src/stdio/__string_read.c
index de002fc1..7b50a7e1 100644
--- a/src/stdio/__string_read.c
+++ b/src/stdio/__string_read.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 size_t __string_read(FILE *f, unsigned char *buf, size_t len)
 {
diff --git a/src/stdio/fgetln.c b/src/stdio/fgetln.c
index 06b88837..a2e4bd3c 100644
--- a/src/stdio/fgetln.c
+++ b/src/stdio/fgetln.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 char *fgetln(FILE *f, size_t *plen)
 {
diff --git a/src/stdio/fgets.c b/src/stdio/fgets.c
index ee0ac30e..b01a4187 100644
--- a/src/stdio/fgets.c
+++ b/src/stdio/fgets.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
diff --git a/src/stdio/fgetwc.c b/src/stdio/fgetwc.c
index 6f9f9ec2..8626d54c 100644
--- a/src/stdio/fgetwc.c
+++ b/src/stdio/fgetwc.c
@@ -1,4 +1,6 @@
 #include "stdio_impl.h"
+#include <wchar.h>
+#include <errno.h>
 
 wint_t __fgetwc_unlocked(FILE *f)
 {
diff --git a/src/stdio/fgetws.c b/src/stdio/fgetws.c
index fab9bd0f..195cb435 100644
--- a/src/stdio/fgetws.c
+++ b/src/stdio/fgetws.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t __fgetwc_unlocked(FILE *);
 
diff --git a/src/stdio/fmemopen.c b/src/stdio/fmemopen.c
index 770fd995..91d52bc1 100644
--- a/src/stdio/fmemopen.c
+++ b/src/stdio/fmemopen.c
@@ -1,4 +1,7 @@
 #include "stdio_impl.h"
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
 
 struct cookie {
 	size_t pos, len, size;
diff --git a/src/stdio/fopen.c b/src/stdio/fopen.c
index c741aede..da17ce8b 100644
--- a/src/stdio/fopen.c
+++ b/src/stdio/fopen.c
@@ -1,4 +1,7 @@
 #include "stdio_impl.h"
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
 
 FILE *fopen(const char *restrict filename, const char *restrict mode)
 {
diff --git a/src/stdio/fputs.c b/src/stdio/fputs.c
index b41bc8c7..1112b192 100644
--- a/src/stdio/fputs.c
+++ b/src/stdio/fputs.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 int fputs(const char *restrict s, FILE *restrict f)
 {
diff --git a/src/stdio/fputwc.c b/src/stdio/fputwc.c
index 45ea8c23..7b621dd2 100644
--- a/src/stdio/fputwc.c
+++ b/src/stdio/fputwc.c
@@ -1,4 +1,7 @@
 #include "stdio_impl.h"
+#include <wchar.h>
+#include <limits.h>
+#include <ctype.h>
 
 wint_t __fputwc_unlocked(wchar_t c, FILE *f)
 {
diff --git a/src/stdio/fputws.c b/src/stdio/fputws.c
index 0b593c08..5723cbcd 100644
--- a/src/stdio/fputws.c
+++ b/src/stdio/fputws.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 int fputws(const wchar_t *restrict ws, FILE *restrict f)
 {
diff --git a/src/stdio/fread.c b/src/stdio/fread.c
index 3f31af8a..c461256c 100644
--- a/src/stdio/fread.c
+++ b/src/stdio/fread.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
diff --git a/src/stdio/freopen.c b/src/stdio/freopen.c
index 7ae116d8..6c1b575f 100644
--- a/src/stdio/freopen.c
+++ b/src/stdio/freopen.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <fcntl.h>
 
 /* The basic idea of this implementation is to open a new FILE,
  * hack the necessary parts of the new FILE into the old one, then
diff --git a/src/stdio/ftell.c b/src/stdio/ftell.c
index 3904a1d8..82371e37 100644
--- a/src/stdio/ftell.c
+++ b/src/stdio/ftell.c
@@ -1,4 +1,6 @@
 #include "stdio_impl.h"
+#include <limits.h>
+#include <errno.h>
 
 off_t __ftello_unlocked(FILE *f)
 {
diff --git a/src/stdio/fwrite.c b/src/stdio/fwrite.c
index 8027b306..d5f6542d 100644
--- a/src/stdio/fwrite.c
+++ b/src/stdio/fwrite.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <string.h>
 
 size_t __fwritex(const unsigned char *restrict s, size_t l, FILE *restrict f)
 {
diff --git a/src/stdio/getdelim.c b/src/stdio/getdelim.c
index 5015c3a6..26093a6c 100644
--- a/src/stdio/getdelim.c
+++ b/src/stdio/getdelim.c
@@ -1,4 +1,7 @@
 #include "stdio_impl.h"
+#include <string.h>
+#include <inttypes.h>
+#include <errno.h>
 
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
diff --git a/src/stdio/gets.c b/src/stdio/gets.c
index 24319eb2..6c4645e5 100644
--- a/src/stdio/gets.c
+++ b/src/stdio/gets.c
@@ -1,4 +1,6 @@
 #include "stdio_impl.h"
+#include <limits.h>
+#include <string.h>
 
 char *gets(char *s)
 {
diff --git a/src/stdio/getwc.c b/src/stdio/getwc.c
index a2818bc4..a5008f0e 100644
--- a/src/stdio/getwc.c
+++ b/src/stdio/getwc.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t getwc(FILE *f)
 {
diff --git a/src/stdio/getwchar.c b/src/stdio/getwchar.c
index 2295bd40..bd89e0ec 100644
--- a/src/stdio/getwchar.c
+++ b/src/stdio/getwchar.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t getwchar(void)
 {
diff --git a/src/stdio/open_memstream.c b/src/stdio/open_memstream.c
index 687e818d..c7330abe 100644
--- a/src/stdio/open_memstream.c
+++ b/src/stdio/open_memstream.c
@@ -1,4 +1,7 @@
 #include "stdio_impl.h"
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
 
 struct cookie {
 	char **bufp;
diff --git a/src/stdio/open_wmemstream.c b/src/stdio/open_wmemstream.c
index a830b143..2fe504c7 100644
--- a/src/stdio/open_wmemstream.c
+++ b/src/stdio/open_wmemstream.c
@@ -1,4 +1,8 @@
 #include "stdio_impl.h"
+#include <wchar.h>
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
 
 struct cookie {
 	wchar_t **bufp;
diff --git a/src/stdio/pclose.c b/src/stdio/pclose.c
index 7fb76ed4..080a4262 100644
--- a/src/stdio/pclose.c
+++ b/src/stdio/pclose.c
@@ -1,5 +1,6 @@
 #include "stdio_impl.h"
-#include "syscall.h"
+#include <errno.h>
+#include <unistd.h>
 
 int pclose(FILE *f)
 {
diff --git a/src/stdio/putwc.c b/src/stdio/putwc.c
index 80b54a47..4bb74733 100644
--- a/src/stdio/putwc.c
+++ b/src/stdio/putwc.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t putwc(wchar_t c, FILE *f)
 {
diff --git a/src/stdio/putwchar.c b/src/stdio/putwchar.c
index 3aacc1cf..b249c4ac 100644
--- a/src/stdio/putwchar.c
+++ b/src/stdio/putwchar.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 wint_t putwchar(wchar_t c)
 {
diff --git a/src/stdio/ungetwc.c b/src/stdio/ungetwc.c
index 5282fee1..8cc85a6b 100644
--- a/src/stdio/ungetwc.c
+++ b/src/stdio/ungetwc.c
@@ -1,4 +1,8 @@
 #include "stdio_impl.h"
+#include <wchar.h>
+#include <limits.h>
+#include <ctype.h>
+#include <string.h>
 
 wint_t ungetwc(wint_t c, FILE *f)
 {
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 4a2752b2..1e7e6a47 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -1,4 +1,13 @@
 #include "stdio_impl.h"
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+#include <string.h>
+#include <stdarg.h>
+#include <wchar.h>
+#include <inttypes.h>
+#include <math.h>
+#include <float.h>
 
 /* Some useful macros */
 
diff --git a/src/stdio/vfscanf.c b/src/stdio/vfscanf.c
index 54d08495..fe071e95 100644
--- a/src/stdio/vfscanf.c
+++ b/src/stdio/vfscanf.c
@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <ctype.h>
@@ -9,6 +8,7 @@
 #include <errno.h>
 #include <math.h>
 #include <float.h>
+#include <inttypes.h>
 
 #include "stdio_impl.h"
 #include "shgetc.h"
diff --git a/src/stdio/vfwprintf.c b/src/stdio/vfwprintf.c
index a42ba195..eb079312 100644
--- a/src/stdio/vfwprintf.c
+++ b/src/stdio/vfwprintf.c
@@ -1,4 +1,11 @@
 #include "stdio_impl.h"
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+#include <string.h>
+#include <stdarg.h>
+#include <wchar.h>
+#include <inttypes.h>
 
 /* Convenient bit representation for modifier flags, which all fall
  * within 31 codepoints of the space character. */
diff --git a/src/stdio/vsnprintf.c b/src/stdio/vsnprintf.c
index 6f19b028..be2c44eb 100644
--- a/src/stdio/vsnprintf.c
+++ b/src/stdio/vsnprintf.c
@@ -1,4 +1,8 @@
 #include "stdio_impl.h"
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
 
 static size_t sn_write(FILE *f, const unsigned char *s, size_t l)
 {
diff --git a/src/stdio/vswprintf.c b/src/stdio/vswprintf.c
index f3d4fec1..7d237bae 100644
--- a/src/stdio/vswprintf.c
+++ b/src/stdio/vswprintf.c
@@ -1,4 +1,9 @@
 #include "stdio_impl.h"
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+#include <wchar.h>
 
 struct cookie {
 	wchar_t *ws;
diff --git a/src/stdio/vswscanf.c b/src/stdio/vswscanf.c
index a205200a..7a2f7c7a 100644
--- a/src/stdio/vswscanf.c
+++ b/src/stdio/vswscanf.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <wchar.h>
 
 static size_t wstring_read(FILE *f, unsigned char *buf, size_t len)
 {
diff --git a/src/stdlib/strtol.c b/src/stdlib/strtol.c
index 23a2f3b6..7ee88794 100644
--- a/src/stdlib/strtol.c
+++ b/src/stdlib/strtol.c
@@ -1,6 +1,9 @@
 #include "stdio_impl.h"
 #include "intscan.h"
 #include "shgetc.h"
+#include <inttypes.h>
+#include <limits.h>
+#include <ctype.h>
 
 static unsigned long long strtox(const char *s, char **p, int base, unsigned long long lim)
 {
diff --git a/src/stdlib/wcstod.c b/src/stdlib/wcstod.c
index 03670b0b..83f308d3 100644
--- a/src/stdlib/wcstod.c
+++ b/src/stdlib/wcstod.c
@@ -1,6 +1,7 @@
 #include "shgetc.h"
 #include "floatscan.h"
 #include "stdio_impl.h"
+#include <wctype.h>
 
 /* This read function heavily cheats. It knows:
  *  (1) len will always be 1
diff --git a/src/stdlib/wcstol.c b/src/stdlib/wcstol.c
index 3d7c97da..4443f577 100644
--- a/src/stdlib/wcstol.c
+++ b/src/stdlib/wcstol.c
@@ -1,6 +1,10 @@
 #include "stdio_impl.h"
 #include "intscan.h"
 #include "shgetc.h"
+#include <inttypes.h>
+#include <limits.h>
+#include <wctype.h>
+#include <wchar.h>
 
 /* This read function heavily cheats. It knows:
  *  (1) len will always be 1