1#! /bin/sh
2# Deduce values of standard ANSI and POSIX types (e.g. size_t, pid_t).
3# Emits macros definitions for these, and some other types.
4# Intended to be used to massage the sys-protos.h file.
5# Expects one arg, which is the GCC source directory.
6
7CC=${CC-"./xgcc -B$1/"}
8CPP=${CPP-`echo ${CC} -E -I"$1/"`}
9SED=sed
10
11# Generate definitions for the standard types (such as mode_t)
12# compatible with those in the standard C header files.
13# It works by a dummy program through the C pre-processor, and then
14# using sed to search for typedefs in the output.
15
16cat >st-dummy.c <<!EOF!
17#include <sys/types.h>
18#include <stddef.h>
19#include <stdarg.h>
20#include <stdio.h>
21#include <time.h>
22#include <signal.h>
23#ifdef size_t
24typedef size_t Xsize_t;
25#elif defined(__SIZE_TYPE__)
26typedef __SIZE_TYPE__ Xsize_t;
27#endif
28#ifdef va_list
29typedef va_list XXXva_list;
30#endif
31!EOF!
32
33if ${CPP} st-dummy.c >TMP ; then true
34else
35  echo "scan-types: could not invoke ${CPP} on st-dummy.c" 1>&2 ; exit 1
36fi
37tr '	' ' ' <TMP >st-dummy.out
38
39for TYPE in dev_t clock_t fpos_t gid_t ino_t mode_t nlink_t off_t pid_t size_t ssize_t time_t uid_t va_list int32_t uint_32_t ; do
40    IMPORTED=`eval 'echo $'"$TYPE"`
41    if [ -n "${IMPORTED}" ] ; then
42	eval "$TYPE='$IMPORTED"
43    else
44	# Search st-dummy.out for a typedef for $TYPE, and write it out
45	# to TMP in #define syntax.
46	rm -f TMP
47	${SED} -n -e "s|.*typedef  *\(.*\) X*$TYPE *;.*|\1|w TMP" <st-dummy.out>/dev/null
48	# Now select the first definition.
49        if [ -s TMP ]; then
50	    # VALUE is now the typedef'd definition of $TYPE.
51            eval "VALUE='`${SED} -e 's| *$||' -e '2,$d' <TMP`'"
52	    # Unless VALUE contains a blank, look for a typedef for it
53	    # in turn (this could be a loop, but that would be over-kill).
54	    # Ensure $VALUE is double quoted to protect cases where it
55	    # contains an asterisk and would cause filename expansion.
56	    # E.g. when va_list is "char *".
57	    if echo "$VALUE" | grep " " >/dev/null ; then true
58	    else
59		rm -f TMP
60		${SED} -n -e "s|.*typedef[ 	][ 	]*\(.*[^a-zA-Z0-9_]\)${VALUE}[ 	]*;.*|\1|w TMP" <st-dummy.out>/dev/null
61		if [ -s TMP ]; then
62		    eval "VALUE='`${SED} -e '2,$d' -e 's|[ 	]*$||' <TMP`'"
63		fi
64	    fi
65	    eval "$TYPE='$VALUE'"
66	fi
67    fi
68done
69
70cat <<!EOF!
71#define ${macro_prefix}clock_t ${clock_t-int /* default */}
72#define ${macro_prefix}dev_t ${dev_t-int /* default */}
73#define ${macro_prefix}fpos_t ${fpos_t-long /* default */}
74#define ${macro_prefix}gid_t ${gid_t-int /* default */}
75#define ${macro_prefix}ino_t ${ino_t-int /* default */}
76#define ${macro_prefix}mode_t ${mode_t-int /* default */}
77#define ${macro_prefix}nlink_t ${nlink_t-int /* default */}
78#define ${macro_prefix}off_t ${off_t-long /* default */}
79#define ${macro_prefix}pid_t ${pid_t-int /* default */}
80#define ${macro_prefix}ptrdiff_t __PTRDIFF_TYPE__
81#define ${macro_prefix}size_t __SIZE_TYPE__
82#define ${macro_prefix}time_t ${time_t-int /* default */}
83#define ${macro_prefix}uid_t ${uid_t-int /* default */}
84#define ${macro_prefix}wchar_t __WCHAR_TYPE__
85#define ${macro_prefix}int32_t ${int32_t-int /* default */}
86#define ${macro_prefix}uint32_t ${uint32_t-unsigned int /* default */}
87!EOF!
88
89# (wait_arg_t*) should be (int*), according to Posix, but
90# BSD traditionally used (union wait*).  Use (void*) to allow either usage.
91echo "#define ${macro_prefix}wait_arg_t void"
92
93# ssize_t is the signed version of size_t
94if [ -n "${ssize_t}" ] ; then
95    echo "#define ${macro_prefix}ssize_t ${ssize_t}"
96elif [ -z "${size_t}" ] ; then
97    echo "#define ${macro_prefix}ssize_t long"
98else
99    # Remove "unsigned" from ${size_t} to get ${ssize_t}.
100    tmp="`echo ${size_t} | ${SED} -e 's|unsigned||g' -e 's|  | |g'`"
101    if [ -z "$tmp" ] ; then
102	tmp=int
103    else
104	# check $tmp doesn't conflict with <unistd.h>
105	echo "#include <unistd.h>
106	extern $tmp read();" >st-dummy.c
107	${CC} -c st-dummy.c >/dev/null 2>&1 || tmp=int
108    fi
109    echo "#define ${macro_prefix}ssize_t $tmp /* default */"
110fi
111
112# va_list can cause problems (e.g. some systems have va_list as a struct).
113# Check to see if ${va_list-char*} really is compatible with stdarg.h.
114cat >st-dummy.c <<!EOF!
115#define X_va_list ${va_list-char* /* default */}
116extern long foo(X_va_list ap); /* Check that X_va_list compiles on its own */
117#include <stdarg.h>
118long foo(X_va_list ap) { return va_arg(ap, long); }
119long bar(int i, ...)
120{ va_list ap; long j; va_start(ap, i); j = foo(ap); va_end(ap); return j; }
121!EOF!
122if ${CC} -c st-dummy.c >/dev/null 2>&1 ; then
123  # Ok: We have something that works.
124  echo "#define ${macro_prefix}va_list ${va_list-char* /* default */}"
125else
126  # No, it breaks.  Indicate that <stdarg.h> must be included.
127  echo "#define ${macro_prefix}NEED_STDARG_H
128#define ${macro_prefix}va_list va_list"
129fi
130
131# stuff needed for curses.h
132
133# This isn't correct for SVR4 (for example).  However, we only
134# use this when adding a missing prototype, so it shouldn't matter.
135echo "#define chtype int"
136# sys-protos.h uses non-standard names (due to the CHTYPE argument problem).
137echo "#define box32 box"
138echo "#define initscr32 initscr"
139echo "#define w32addch waddch"
140echo "#define w32insch winsch"
141
142rm -f st-dummy.c st-dummy.o TMP st-dummy.out
143