From c8f538425f4e92e1e438b9bd25cb08e250a93d5b Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Mon, 26 Mar 2007 12:02:41 +0000
Subject: sync with plan 9

---
 src/cmd/rc/getflags.c | 171 +++++++++++++++++++++++++++++---------------------
 1 file changed, 99 insertions(+), 72 deletions(-)

(limited to 'src/cmd/rc/getflags.c')

diff --git a/src/cmd/rc/getflags.c b/src/cmd/rc/getflags.c
index c452067f..09f6e3a7 100644
--- a/src/cmd/rc/getflags.c
+++ b/src/cmd/rc/getflags.c
@@ -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++;
+				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(*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;
 	}
 }
-- 
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