int main(int argc,char* argv[]) {
static size_t x;
x=23;
atomic_add(&x,3);
printf("%u\n",x);
printf("%u\n",atomic_add_return(&x,-3));
printf("%u\n",compare_and_swap(&x,26,17));
printf("%u\n",compare_and_swap(&x,23,17));
#if 0
atomic_add(&x,3); printf("%u\n",x);
x=23;
atomic_add(&x,3); assert(x==26);
atomic_or(&x,1); assert(x==27);
atomic_and(&x,-2); assert(x==26);
#endif
#if 0
iarray a;
char* c;
iarray_init(&a,sizeof(io_entry));
printf("15 -> %p\n",c=iarray_allocate(&a,15));
printf("23 -> %p\n",c=iarray_allocate(&a,23));
printf("1234567 -> %p\n",c=iarray_allocate(&a,1234567));
printf("23 -> %p\n",iarray_get(&a,23));
#endif
#if 0
io_batch* b=iob_new(1234);
int64 fd=open("t.c",0);
iob_addbuf(b,"fnord",5);
iob_addfile_close(b,fd,0,7365);
iob_write(1,b,writecb);
#endif
#if 0
char dest[1024];
unsigned long len;
scan_urlencoded2("libstdc++.tar.gz",dest,&len);
buffer_putmflush(buffer_1,dest,"\n");
#endif
#if 0
static stralloc sa;
stralloc_copym(&sa,"foo ","bar ","baz.\n");
write(1,sa.s,sa.len);
#endif
#if 0
buffer_putmflush(buffer_1,"foo ","bar ","baz.\n");
#endif
#if 0
char* c="fnord";
int fd=open_read(c);
errmsg_iam(argv[0]);
carp("could not open file `",c,"'");
diesys(23,"could not open file `",c,"'");
#endif
#if 0
errmsg_warn("could not open file `",c,"'",0);
errmsg_warnsys("could not open file `",c,"'",0);
#endif
#if 0
char buf[100]="/usr/bin/sh";
int len=str_len(buf);
assert(byte_rchr(buf,len,'/')==8);
assert(byte_rchr(buf,len,'@')==len);
assert(byte_rchr(buf,len,'h')==len-1);
printf("%d\n",byte_rchr("x",1,'x'));
#endif
#if 0
char buf[IP6_FMT+100];
int i;
char ip[16];
uint32 scope_id;
char* s="fec0::1:220:e0ff:fe69:ad92%eth0/64";
char blubip[16]="\0\0\0\0\0\0\0\0\0\0\xff\xff\x7f\0\0\001";
i=scan_ip6if(s,ip,&scope_id);
assert(s[i]=='/');
buffer_put(buffer_1,buf,fmt_ip6if(buf,ip,scope_id));
buffer_putnlflush(buffer_1);
buffer_put(buffer_1,buf,fmt_ip6ifc(buf,blubip,scope_id));
buffer_putnlflush(buffer_1);
scan_ip6("2001:7d0:0:f015:0:0:0:1",ip);
buffer_put(buffer_1,buf,fmt_ip6(buf,ip));
buffer_putnlflush(buffer_1);
#endif
#if 0
char buf[100];
int i;
printf("%d\n",i=fmt_pad(buf,"fnord",5,7,10));
buf[i]=0;
puts(buf);
#endif
#if 0
char ip[16];
char buf[32];
printf("%d (expect 2)\n",scan_ip6("::",ip));
printf("%d (expect 3)\n",scan_ip6("::1",ip));
printf("%d (expect 16)\n",scan_ip6("fec0:0:0:ffff::1/0",ip));
printf("%.*s\n",fmt_ip6(buf,ip),buf);
#endif
#if 0
static stralloc s,t;
stralloc_copys(&s,"fnord");
stralloc_copys(&t,"abc"); printf("%d\n",stralloc_diff(&s,&t));
stralloc_copys(&t,"fnor"); printf("%d\n",stralloc_diff(&s,&t));
stralloc_copys(&t,"fnord"); printf("%d\n",stralloc_diff(&s,&t));
stralloc_copys(&t,"fnordh"); printf("%d\n",stralloc_diff(&s,&t));
stralloc_copys(&t,"hausen"); printf("%d\n",stralloc_diff(&s,&t));
#endif
#if 0
static stralloc s;
stralloc_copys(&s,"fnord");
printf("%d\n",stralloc_diffs(&s,"abc"));
printf("%d\n",stralloc_diffs(&s,"fnor"));
printf("%d\n",stralloc_diffs(&s,"fnord"));
printf("%d\n",stralloc_diffs(&s,"fnordh"));
printf("%d\n",stralloc_diffs(&s,"hausen"));
#endif
#if 0
printf("%d\n",case_starts("fnordhausen","FnOrD"));
printf("%d\n",case_starts("fnordhausen","blah"));
#endif
#if 0
char buf[]="FnOrD";
case_lowers(buf);
puts(buf);
#endif
#if 0
char buf[100]="foo bar baz";
printf("%d (expect 7)\n",byte_rchr(buf,11,' '));
#endif
#if 0
unsigned long size;
char* buf=mmap_read(argv[1],&size);
if (buf) {
unsigned int x=fmt_yenc(0,buf,size);
unsigned int y;
char* tmp=malloc(x+1);
y=fmt_yenc(tmp,buf,size);
write(1,tmp,x);
}
#endif
#if 0
char buf[100];
char buf2[100];
unsigned int len,len2;
buf[fmt_yenc(buf,"http://localhost/~fefe",22)]=0;
buffer_puts(buffer_1,buf);
buffer_putsflush(buffer_1,"\n");
if ((buf[len2=scan_yenc(buf,buf2,&len)])!='\n') {
buffer_putsflush(buffer_2,"parse error!\n");
return 1;
}
buffer_put(buffer_1,buf2,len2);
buffer_putsflush(buffer_1,"\n");
return 0;
#endif
#if 0
char buf[100];
char buf2[100];
unsigned int len,len2;
buf[fmt_base64(buf,"foo:bar",7)]=0;
buffer_puts(buffer_1,buf);
buffer_putsflush(buffer_1,"\n");
if ((buf[len2=scan_base64(buf,buf2,&len)])!=0) {
buffer_putsflush(buffer_2,"parse error!\n");
return 1;
}
buffer_put(buffer_1,buf2,len2);
buffer_putsflush(buffer_1,"\n");
return 0;
#endif
#if 0
unsigned long size;
char* buf=mmap_read(argv[1],&size);
if (buf) {
unsigned int x=fmt_uuencoded(0,buf,size);
unsigned int y;
char* tmp=malloc(x+1);
y=fmt_uuencoded(tmp,buf,size);
write(1,tmp,x);
}
#endif
#if 0
char buf[]="00000000000000000000000000000001";
char ip[16];
if (scan_ip6_flat(buf,ip) != str_len(buf))
buffer_putsflush(buffer_2,"parse error!\n");
#endif
#if 0
int fd=open_read("t.c");
buffer b;
char buf[1024];
char line[20];
int i;
buffer_init(&b,read,fd,buf,1024);
i=buffer_getline(&b,line,19);
buffer_puts(buffer_1,"getline returned ");
buffer_putulong(buffer_1,i);
buffer_puts(buffer_1,"\n");
buffer_puts(buffer_1,line);
buffer_flush(buffer_1);
#endif
#if 0
buffer_putulong(buffer_1,23);
// buffer_putspace(buffer_1);
buffer_putsflush(buffer_1,"\n");
// buffer_flush(buffer_1);
#endif
#if 0
long a,b,c;
char buf[4096];
char buf2[4096];
memcpy(buf,buf2,4096);
byte_copy(buf,4096,buf2);
rdtscl(a);
memcpy(buf,buf2,4096);
rdtscl(b);
byte_copy(buf,4096,buf2);
rdtscl(c);
printf("memcpy: %d - byte_copy: %d\n",b-a,c-b);
#endif
#if 0
char ip[16];
int i;
if ((i=scan_ip6(argv[1],ip))) {
char buf[128];
buf[fmt_ip6(buf,ip)]=0;
puts(buf);
}
#endif
#if 0
char buf[100];
strcpy(buf,"foobarbaz");
buf[fmt_fill(buf,3,5,100)]=0;
printf("\"%s\"\n",buf);
#endif
#if 0
unsigned long len;
char *c=mmap_read("/etc/passwd",&len);
printf("got map %p of len %lu\n",c,len);
#endif
#if 0
char c;
printf("%d\n",buffer_getc(buffer_0,&c));
printf("%c\n",c);
#endif
#if 0
char buf[100]="01234567890123456789012345678901234567890123456789";
long a,b,c;
#endif
#if 0
buf[ip4_fmt(buf,ip4loopback)]=0;
buffer_puts(buffer_1small,buf);
buffer_flush(buffer_1small);
#endif
#if 0
buf[0]=0;
buf[fmt_8long(buf,0)]=0;
puts(buf);
rdtscl(a);
c=str_len(buf);
rdtscl(b);
/*byte_zero_djb(buf,j); */
// printf("\n%lu %d\n",b-a,c);
#endif
#if 0
buffer_puts(buffer_1small,"hello, world\n");
buffer_flush(buffer_1small);
#endif
#if 0
int s=socket_tcp4();
char ip[4]={127,0,0,1};
int t=socket_connect4(s,ip,80);
#endif
#if 0
char buf[100]="foo bar baz fnord ";
char buf2[100]="foo braz fnord";
long a,b,c;
long i=0,j=0,k=0;
double d;
uint32 l,m,n;
stralloc sa={0};
stralloc_copys(&sa,"fnord");
stralloc_catlong0(&sa,-23,5);
stralloc_append(&sa,"\n");
printf("%d %d\n",str_equal("fnord","fnord1"),str_equal("fnord1","fnord"));
write(1,sa.s,sa.len);
printf("%d %d\n",stralloc_starts(&sa,"fnord"),stralloc_starts(&sa,"fnord\na"));
l=0xdeadbeef;
uint32_pack_big((char*)&m,l);
uint32_unpack_big((char*)&m,&n);
printf("%x %x %x\n",l,m,n);
rdtscl(a);
/* i=scan_double("3.1415",&d); */
rdtscl(b);
/*byte_zero_djb(buf,j); */
rdtscl(c);
printf("%lu %lu\n",b-a,c-b);
#endif
#if 0
size_t size;
char* buf=mmap_read(argv[1],&size);
if (buf) {
unsigned int x=fmt_urlencoded2(0,buf,size,"x");
unsigned int y;
char* tmp=malloc(x+1);
y=fmt_urlencoded2(tmp,buf,size,"x");
write(1,tmp,x);
}
#endif
#if 0
printf("%d %d\n",strcmp("foo","bar"),str_diff("foo","bar"));
printf("%d %d\n",strcmp("foo","üar"),str_diff("foo","üar"));
#endif
#if 0
{
int16 a;
int32 b;
int64 c;
assert(imult16(4,10000,&a)==0);
assert(imult16(-4,10000,&a)==0);
assert(imult16(5,10,&a)==1 && a==50);
assert(imult16(-3,10000,&a)==1 && a==-30000);
assert(imult32(0x40000000,2,&b)==0);
assert(imult32(0x3fffffff,2,&b)==1 && b==0x7ffffffe);
assert(imult64(0x4000000000000000ll,2,&c)==0);
assert(imult64(0x3fffffffffffffffll,2,&c)==1 && c==0x7ffffffffffffffell);
}
#endif
#if 0
stralloc a;
printf("%d\n",stralloc_copym(&a,"fnord",", ","foo"));
#endif
return 0;
}
union node*
expand_param(struct nargparam* param, union node** nptr, struct vartab* varstack, char* argv[], int exitcode, int flags) {
union node* n = *nptr;
stralloc value;
char* str = NULL;
const char *v = NULL;
unsigned long argc, vlen = 0;
for(argc = 0; argv[argc]; ++argc)
;
stralloc_init(&value);
/* treat special arguments */
if(param->flag & S_SPECIAL) {
switch(param->flag & S_SPECIAL) {
/* $# substitution */
case S_ARGC: {
stralloc_catulong0(&value, argc, 0);
break;
}
/* $* substitution */
case S_ARGV: {
char** s;
for(s = argv; *s;) {
stralloc_cats(&n->narg.stra, *s);
if(*++s) stralloc_catc(&n->narg.stra, ' ');
}
break;
}
/* $@ substitution */
case S_ARGVS: {
unsigned int i = 0;
while(i < argc) {
param->flag &= ~S_SPECIAL;
param->flag |= S_ARG;
param->numb = 1 + i;
n = expand_param(param, nptr, varstack, argv, exitcode,flags);
if(++i < argc) nptr = &n->list.next;
}
return n;
}
/* $? substitution */
case S_EXITCODE: {
stralloc_catulong0(&value, exitcode, 0);
break;
}
/* $- substitution */
case S_FLAGS: break;
/* $! substitution */
case S_BGEXCODE:
break;
/* $[0-9] arg subst */
case S_ARG: {
if(param->numb == 0) {
/* stralloc_cats(&value, sh_argv0); */
} else if(param->numb - 1 < argc) {
stralloc_cats(&value, argv[param->numb - 1]);
}
break;
}
/* $$ arg subst */
case S_PID: {
stralloc_catulong0(&value, getpid(), 0);
break;
}
}
/* special parameters are always set */
if(value.len) {
stralloc_nul(&value);
v = value.s;
}
vlen = value.len;
}
/* ..and variable substitutions */
else {
size_t offset;
/* look for the variable.
if the S_NULL flag is set and we have a var which is null
set v to NULL */
if((v = var_get(varstack, param->name, &offset))) {
if(v[offset] == '\0' && (param->flag & S_NULL)) {
v = NULL;
vlen = 0;
} else {
v = &v[offset];
vlen = str_len(v);
}
}
}
/* check for S_STRLEN substitution */
if(param->flag & S_STRLEN) {
char lstr[FMT_ULONG];
n = expand_cat(lstr, fmt_ulong(lstr, vlen), nptr, varstack, flags);
stralloc_free(&value);
return n;
}
str = str_ndup(v, vlen);
/* otherwise expand the apropriate variable/word subst */
switch(param->flag & S_VAR) {
/* return word if parameter unset (or null) */
case S_DEFAULT: {
if(v) n = expand_cat(v, vlen, nptr, varstack, flags);
/* unset, substitute */
else
n = expand_arg(¶m->word->narg, nptr, varstack, argv, exitcode, flags);
break;
}
/* if parameter unset (or null) then expand word to it
and substitute paramter */
case S_ASGNDEF: {
if(v)
n = expand_cat(v, vlen, nptr, varstack, flags);
else {
n = expand_arg(¶m->word->narg, nptr, varstack, argv, exitcode, flags | X_NOSPLIT);
var_setvsa(param->name, /* BUG */ &n->narg.stra, V_DEFAULT);
}
break;
}
/* indicate error if null or unset */
case S_ERRNULL: {
if(v)
n = expand_cat(v, vlen, nptr, varstack, flags);
else {
union node* tmpnode = NULL;
n = expand_arg(¶m->word->narg, &tmpnode, varstack, argv, exitcode, flags);
errmsg_warn((n && n->narg.stra.s) ? n->narg.stra.s : "parameter null or not set", 0);
if(tmpnode) tree_free(tmpnode);
}
break;
}
/* if parameter unset (or null) then substitute null,
otherwise substitute word */
case S_ALTERNAT: {
if(v) n = expand_arg(¶m->word->narg, nptr, varstack, argv, exitcode, flags);
break;
/* remove smallest matching suffix */
case S_RSSFX: {
int i;
stralloc sa;
if(v && vlen) {
expand_copysa(param->word, &sa, varstack, argv, exitcode, 0);
stralloc_nul(&sa);
for(i = vlen - 1; i >= 0; i--)
if(fnmatch(sa.s, str + i, FNM_PERIOD) == 0) break;
n = expand_cat(v, (i < 0 ? vlen : i), nptr, varstack, flags);
}
break;
}
}
/* remove largest matching suffix */
case S_RLSFX: {
unsigned int i;
stralloc sa;
if(v && vlen) {
expand_copysa(param->word, &sa, varstack, argv, exitcode, 0);
stralloc_nul(&sa);
for(i = 0; i <= vlen; i++)
if(fnmatch(sa.s, str + i, FNM_PERIOD) == 0) break;
n = expand_cat(v, (i > vlen ? vlen : i), nptr, varstack, flags);
}
break;
}
/* remove smallest matching prefix */
case S_RSPFX: {
unsigned int i;
stralloc sa;
if(v && vlen) {
expand_copysa(param->word, &sa, varstack, argv, exitcode, 0);
stralloc_nul(&sa);
for(i = 1; i <= vlen; i++) {
str_copyn(str, v, i);
if(fnmatch(sa.s, (char*)v, FNM_PERIOD) == 0) break;
}
if(i > vlen) i = 0;
n = expand_cat(v + i, vlen - i, nptr, varstack, flags);
str_copy(str, v);
}
break;
}
/* remove largest matching prefix */
case S_RLPFX: {
unsigned int i;
stralloc sa;
if(v && vlen) {
expand_copysa(param->word, &sa, varstack, argv, exitcode, 0);
stralloc_nul(&sa);
for(i = vlen; i > 0; i--) {
str_copyn(str, v, i);
if(fnmatch(sa.s, (char*)v, FNM_PERIOD) == 0) break;
}
if(i == 0) i = vlen;
n = expand_cat(v + i, vlen - i, nptr, varstack, flags);
str_copy(str, v);
}
break;
}
}
free(str);
stralloc_free(&value);
return n;
}
