diff options
Diffstat (limited to 'src/cmd/getflags/funcgetflags.c')
| -rw-r--r-- | src/cmd/getflags/funcgetflags.c | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/src/cmd/getflags/funcgetflags.c b/src/cmd/getflags/funcgetflags.c index d0686679..e69de29b 100644 --- a/src/cmd/getflags/funcgetflags.c +++ b/src/cmd/getflags/funcgetflags.c @@ -1,267 +0,0 @@ -#include <u.h> -#include <libc.h> -#include <ctype.h> -#include "getflags.h" - -char **flag[NFLAG]; -char cmdline[NCMDLINE+1]; -char *cmdname; -char *flagset[]; -char *flagset[]={"<flag>"}; -static char *flagarg=""; -static void reverse(char **, char **); -static int scanflag(int, char *); -static int reason; -#define RESET 1 -#define ARGCCOUNT 2 -#define FLAGSYN 3 -#define BADFLAG 4 -static int badflag; -char *getflagsargv[NGETFLAGSARGV+2]; /* original argv stored here for people who need it */ - -int -getflags(int argc, char *argv[], char *flags) -{ - char *s, *t; - int i, j, c, count; - flagarg=flags; - if(cmdname==0){ - cmdname=argv[0]; - for(i=0;i!=argc && i!=NGETFLAGSARGV;i++) getflagsargv[i]=argv[i]; - if(argc>NGETFLAGSARGV) getflagsargv[i++]="..."; - getflagsargv[i]=0; - } - s=cmdline; - for(i=0;i!=argc;i++){ - for(t=argv[i];*t;) - if(s!=&cmdline[NCMDLINE]) - *s++=*t++; - else - break; - if(i!=argc-1 && s!=&cmdline[NCMDLINE]) - *s++=' '; - } - *s='\0'; - i=1; - while(i!=argc && argv[i][0]=='-'){ - s=argv[i]+1; - if(*s=='\0'){ /* if argument is "-", stop scanning and delete it */ - for(j=i+1;j<=argc;j++) - argv[j-1]=argv[j]; - return argc-1; - } - while(*s){ - c=*s++; - count=scanflag(c, flags); - if(count==-1) return -1; - if(flag[c]){ reason=RESET; badflag=c; return -1; } - if(count==0){ - flag[c]=flagset; - if(*s=='\0'){ - 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]; - --argc; - s=argv[i]; - } - if(argc-i<count){ - reason=ARGCCOUNT; - 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; - s=""; - } - } - } - return argc; -} - -void -static reverse(char **p, char **q) -{ - register char *t; - for(;p<q;p++,--q){ t=*p; *p=*q; *q=t; } -} - -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(!isdigit((uchar)*f)){ reason=FLAGSYN; return -1; } - count=strtol(f, &f, 10); - } - else - count=0; - if(*f=='['){ - int depth=1; - do{ - f++; - if(*f=='\0'){ reason=FLAGSYN; return -1; } - if(*f=='[') depth++; - if(*f==']') depth--; - }while(depth>0); - f++; - } - if(c==fc) return count; - } - reason=BADFLAG; - badflag=c; - return -1; -} - -static void errn(char *, int), errs(char *), errc(int); - -void -usage(char *tail) -{ - char *s, *t, c; - int count, nflag=0; - switch(reason){ - case RESET: - errs("Flag -"); - errc(badflag); - errs(": set twice\n"); - break; - case ARGCCOUNT: - errs("Flag -"); - errc(badflag); - errs(": too few arguments\n"); - break; - case FLAGSYN: - errs("Bad argument to getflags!\n"); - break; - case BADFLAG: - errs("Illegal flag -"); - errc(badflag); - errc('\n'); - break; - } - errs("Usage: "); - errs(cmdname); - for(s=flagarg;*s;){ - c=*s; - if(*s++==' ') continue; - if(*s==':'){ - s++; - count=strtol(s, &s, 10); - } - else count=0; - if(count==0){ - if(nflag==0) errs(" [-"); - nflag++; - errc(c); - } - if(*s=='['){ - int depth=1; - s++; - for(;*s!='\0' && depth>0; s++) - if (*s==']') depth--; - else if (*s=='[') depth++; - } - } - if(nflag) errs("]"); - for(s=flagarg;*s;){ - c=*s; - if(*s++==' ') continue; - if(*s==':'){ - s++; - count=strtol(s, &s, 10); - } - else count=0; - if(count!=0){ - errs(" [-"); - errc(c); - if(*s=='['){ - int depth=1; - s++; - t=s; - for(;*s!='\0' && depth>0; s++) - if (*s==']') depth--; - else if (*s=='[') depth++; - errs(" "); - errn(t, s-t); - } - else - while(count--) errs(" arg"); - errs("]"); - } - else if(*s=='['){ - int depth=1; - s++; - for(;*s!='\0' && depth>0; s++) - if (*s==']') depth--; - else if (*s=='[') depth++; - } - } - if(tail){ - errs(" "); - errs(tail); - } - errs("\n"); - exits("usage"); -} - -static void -errn(char *s, int count) -{ - while(count){ errc(*s++); --count; } -} - -static void -errs(char *s) -{ - while(*s) errc(*s++); -} - -#define NBUF 80 -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; - } -} - -#ifdef TEST -#include <stdio.h> -main(int argc, char *argv[]) -{ - int c, i, n; - if(argc<3){ - fprint(2, "Usage: %s flags cmd ...\n", argv[0]); - exits("usage"); - } - n=getflags(argc-2, argv+2, argv[1]); - if(n<0) usage("..."); - putchar('\n'); - for(c=0;c!=128;c++) if(flag[c]){ - print("\t-.%c. ", c); - n=scanflag(c, argv[1]); - for(i=0;i!=n;i++) print(" <%s>", flag[c][i]); - putchar('\n'); - } -} -#endif |