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sync with plan 9

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This commit is contained in:
rsc 2007-03-26 12:02:41 +00:00
parent 79049567a0
commit c8f538425f
23 changed files with 1962 additions and 1227 deletions
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171
src/cmd/rc/getflags.c
View file

@ -3,7 +3,7 @@
#include "rc.h"
#include "getflags.h"
#include "fns.h"
char *flagset[]={"<flag>"};
char *flagset[] = {"<flag>"};
char **flag[NFLAG];
char cmdline[NCMDLINE+1];
char *cmdname;
@ -19,105 +19,118 @@ static int reason;
#define FLAGSYN 3
#define BADFLAG 4
static int badflag;
int getflags(int argc, char *argv[], char *flags, int stop)
int
getflags(int argc, char *argv[], char *flags, int stop)
{
char *s, *t;
int i, j, c, count;
flagarg=flags;
if(cmdname==0) cmdname=argv[0];
s=cmdline;
for(i=0;i!=argc;i++){
for(t=argv[i];*t;t++)
flagarg = flags;
if(cmdname==0)
cmdname = argv[0];
s = cmdline;
for(i = 0;i!=argc;i++){
for(t = argv[i];*t;t++)
if(s!=&cmdline[NCMDLINE])
*s++=*t;
if(i!=argc-1 && s!=&cmdline[NCMDLINE])
*s++=' ';
}
*s='\0';
i=1;
i = 1;
while(i!=argc){
if(argv[i][0]!='-' || argv[i][1]=='\0'){
if(stop) return argc;
if(stop)
return argc;
i++;
continue;
}
s=argv[i]+1;
s = argv[i]+1;
while(*s){
c=*s++;
count=scanflag(c, flags);
if(count==-1) return -1;
if(flag[c]){ reason=RESET; badflag=c; return -1; }
count = scanflag(c, flags);
if(count==-1)
return -1;
if(flag[c]){ reason = RESET; badflag = c; return -1; }
if(count==0){
flag[c]=flagset;
flag[c] = flagset;
if(*s=='\0'){
for(j=i+1;j<=argc;j++)
argv[j-1]=argv[j];
for(j = i+1;j<=argc;j++)
argv[j-1] = argv[j];
--argc;
}
}
else{
if(*s=='\0'){
for(j=i+1;j<=argc;j++)
argv[j-1]=argv[j];
for(j = i+1;j<=argc;j++)
argv[j-1] = argv[j];
--argc;
s=argv[i];
s = argv[i];
}
if(argc-i<count){
reason=FEWARGS;
badflag=c;
reason = FEWARGS;
badflag = c;
return -1;
}
reverse(argv+i, argv+argc);
reverse(argv+i, argv+argc-count);
reverse(argv+argc-count+1, argv+argc);
argc-=count;
flag[c]=argv+argc+1;
flag[c][0]=s;
flag[c] = argv+argc+1;
flag[c][0] = s;
s="";
}
}
}
return argc;
}
static void reverse(char **p, char **q)
static void
reverse(char **p, char **q)
{
char *t;
for(;p<q;p++,--q){ t=*p; *p=*q; *q=t; }
for(;p<q;p++,--q){ t=*p; *p=*q; *q = t; }
}
static int scanflag(int c, char *f)
static int
scanflag(int c, char *f)
{
int fc, count;
if(0<=c && c<NFLAG) while(*f){
if(*f==' '){
f++;
continue;
}
fc=*f++;
if(*f==':'){
f++;
if(*f<'0' || '9'<*f){ reason=FLAGSYN; return -1; }
count=0;
while('0'<=*f && *f<='9') count=count*10+*f++-'0';
}
else
count=0;
if(*f=='['){
do{
if(0<=c && c<NFLAG)
while(*f){
if(*f==' '){
f++;
if(*f=='\0'){ reason=FLAGSYN; return -1; }
}while(*f!=']');
f++;
continue;
}
fc=*f++;
if(*f==':'){
f++;
if(*f<'0' || '9'<*f){ reason = FLAGSYN; return -1; }
count = 0;
while('0'<=*f && *f<='9') count = count*10+*f++-'0';
}
else
count = 0;
if(*f=='['){
do{
f++;
if(*f=='\0'){ reason = FLAGSYN; return -1; }
}while(*f!=']');
f++;
}
if(c==fc)
return count;
}
if(c==fc) return count;
}
reason=BADFLAG;
badflag=c;
reason = BADFLAG;
badflag = c;
return -1;
}
void usage(char *tail)
void
usage(char *tail)
{
char *s, *t, c;
int count, nflag=0;
int count, nflag = 0;
switch(reason){
case RESET:
errs("Flag -");
@ -140,46 +153,52 @@ void usage(char *tail)
}
errs("Usage: ");
errs(cmdname);
for(s=flagarg;*s;){
for(s = flagarg;*s;){
c=*s;
if(*s++==' ') continue;
if(*s++==' ')
continue;
if(*s==':'){
s++;
count=0;
while('0'<=*s && *s<='9') count=count*10+*s++-'0';
count = 0;
while('0'<=*s && *s<='9') count = count*10+*s++-'0';
}
else count=0;
else count = 0;
if(count==0){
if(nflag==0) errs(" [-");
if(nflag==0)
errs(" [-");
nflag++;
errc(c);
}
if(*s=='['){
s++;
while(*s!=']' && *s!='\0') s++;
if(*s==']') s++;
if(*s==']')
s++;
}
}
if(nflag) errs("]");
for(s=flagarg;*s;){
if(nflag)
errs("]");
for(s = flagarg;*s;){
c=*s;
if(*s++==' ') continue;
if(*s++==' ')
continue;
if(*s==':'){
s++;
count=0;
while('0'<=*s && *s<='9') count=count*10+*s++-'0';
count = 0;
while('0'<=*s && *s<='9') count = count*10+*s++-'0';
}
else count=0;
else count = 0;
if(count!=0){
errs(" [-");
errc(c);
if(*s=='['){
s++;
t=s;
t = s;
while(*s!=']' && *s!='\0') s++;
errs(" ");
errn(t, s-t);
if(*s==']') s++;
if(*s==']')
s++;
}
else
while(count--) errs(" arg");
@ -188,7 +207,8 @@ void usage(char *tail)
else if(*s=='['){
s++;
while(*s!=']' && *s!='\0') s++;
if(*s==']') s++;
if(*s==']')
s++;
}
}
if(tail){
@ -198,20 +218,27 @@ void usage(char *tail)
errs("\n");
Exit("bad flags");
}
static void errn(char *s, int count)
static void
errn(char *s, int count)
{
while(count){ errc(*s++); --count; }
}
static void errs(char *s)
static void
errs(char *s)
{
while(*s) errc(*s++);
}
#define NBUF 80
static char buf[NBUF], *bufp=buf;
static void errc(int c){
static char buf[NBUF], *bufp = buf;
static void
errc(int c)
{
*bufp++=c;
if(bufp==&buf[NBUF] || c=='\n'){
Write(2, buf, bufp-buf);
bufp=buf;
bufp = buf;
}
}