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sh: Reduce size of builtins table.

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This commit is contained in:
Jilles Tjoelker 2016-01-03 21:30:22 +00:00
parent d3e4bc1271
commit d3fa2c78f2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=293118
2 changed files with 12 additions and 15 deletions
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12
bin/sh/exec.c
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@ -439,12 +439,14 @@ find_command(const char *name, struct cmdentry *entry, int act,
int
find_builtin(const char *name, int *special)
{
const struct builtincmd *bp;
const unsigned char *bp;
size_t len;
for (bp = builtincmd ; bp->name ; bp++) {
if (*bp->name == *name && equal(bp->name, name)) {
*special = bp->special;
return bp->code;
len = strlen(name);
for (bp = builtincmd ; *bp ; bp += 2 + bp[0]) {
if (bp[0] == len && memcmp(bp + 2, name, len) == 0) {
*special = (bp[1] & BUILTIN_SPECIAL) != 0;
return bp[1] & ~BUILTIN_SPECIAL;
}
}
return -1;

15
bin/sh/mkbuiltins
View file

@ -62,17 +62,16 @@ echo 'int (*const builtinfunc[])(int, char **) = {'
awk '/^[^#]/ { printf "\t%s,\n", $1}' $temp
echo '};
const struct builtincmd builtincmd[] = {'
const unsigned char builtincmd[] = {'
awk '{ for (i = 2 ; i <= NF ; i++) {
if ($i == "-s") {
spc = 1;
} else {
printf "\t{ \"%s\", %d, %d },\n", $i, NR-1, spc
printf "\t\"\\%03o\\%03o%s\"\n", length($i), (spc ? 128 : 0) + NR-1, $i
spc = 0;
}
}}' $temp
echo ' { NULL, 0, 0 }
};'
echo '};'
exec > builtins.h
cat <<\!
@ -85,14 +84,10 @@ cat <<\!
tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
awk '{ printf "#define %s %d\n", $1, NR-1}'
echo '
struct builtincmd {
const char *name;
int code;
int special;
};
#define BUILTIN_SPECIAL 0x80
extern int (*const builtinfunc[])(int, char **);
extern const struct builtincmd builtincmd[];
extern const unsigned char builtincmd[];
'
awk '{ printf "int %s(int, char **);\n", $1}' $temp
rm -f $temp