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/* Copyright (c) 1988 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* header.c - routines for reading and writing information headers. |
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* |
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* 8/19/88 |
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* Externals declared in resolu.h |
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* |
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* printargs(ac,av,fp) print an argument list to fp, followed by '\n' |
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* isformat(s) returns true if s is of the form "FORMAT=*" |
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* newheader(t,fp) start new information header identified by string t |
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* headidval(r,s) copy header identifier value in s to r |
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* dateval(t,s) get capture date value as UTC |
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* gmtval(t,s) get GMT as UTC |
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* fputdate(t,fp) put out the given UTC |
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* fputnow(fp) put out the current date and time |
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* printargs(ac,av,fp) print an argument list to fp, followed by '\n' |
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* formatval(r,s) copy the format value in s to r |
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* fputformat(s,fp) write "FORMAT=%s" to fp |
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* getheader(fp,f,p) read header from fp, calling f(s,p) on each line |
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* globmatch(pat, str) check for glob match of str against pat |
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* checkheader(i,p,o) check header format from i against p and copy to o |
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* |
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* To copy header from input to output, use getheader(fin, fputs, fout) |
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*/ |
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#include <stdio.h> |
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#include "copyright.h" |
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|
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#include <ctype.h> |
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#define MAXLINE 512 |
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#include "rtio.h" |
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#include "resolu.h" |
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char FMTSTR[] = "FORMAT="; |
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int FMTSTRL = 7; |
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#define MAXLINE 2048 |
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const char HDRSTR[] = "#?"; /* information header magic number */ |
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|
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printargs(ac, av, fp) /* print arguments to a file */ |
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int ac; |
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char **av; |
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FILE *fp; |
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const char FMTSTR[] = "FORMAT="; /* format identifier */ |
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|
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const char TMSTR[] = "CAPDATE="; /* capture date identifier */ |
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const char GMTSTR[] = "GMT="; /* GMT identifier */ |
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|
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static gethfunc mycheck; |
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|
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|
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extern void |
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newheader( /* identifying line of information header */ |
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char *s, |
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FILE *fp |
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) |
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{ |
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while (ac-- > 0) { |
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fputs(*av++, fp); |
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putc(' ', fp); |
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} |
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fputs(HDRSTR, fp); |
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fputs(s, fp); |
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putc('\n', fp); |
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} |
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|
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isformat(s) /* is line a format line? */ |
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char *s; |
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extern int |
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headidval( /* get header id (return true if is id) */ |
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char *r, |
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char *s |
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) |
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{ |
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return(!strncmp(s,FMTSTR,FMTSTRL)); |
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const char *cp = HDRSTR; |
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|
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while (*cp) if (*cp++ != *s++) return(0); |
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if (r == NULL) return(1); |
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while (*s && !isspace(*s)) *r++ = *s++; |
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*r = '\0'; |
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return(1); |
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} |
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|
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|
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formatval(r, s) /* return format value */ |
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register char *r; |
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register char *s; |
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extern int |
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dateval( /* convert capture date line to UTC */ |
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time_t *tloc, |
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char *s |
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) |
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{ |
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s += FMTSTRL; |
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struct tm tms; |
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const char *cp = TMSTR; |
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|
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while (*cp) if (*cp++ != *s++) return(0); |
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while (isspace(*s)) s++; |
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if (!*s) { *r = '\0'; return; } |
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while(*s) *r++ = *s++; |
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while (isspace(r[-1])) r--; |
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if (!*s) return(0); |
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if (sscanf(s, "%d:%d:%d %d:%d:%d", |
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&tms.tm_year, &tms.tm_mon, &tms.tm_mday, |
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&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6) |
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return(0); |
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if (tloc == NULL) |
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return(1); |
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tms.tm_mon--; |
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tms.tm_year -= 1900; |
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tms.tm_isdst = -1; /* ask mktime() to figure out DST */ |
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*tloc = mktime(&tms); |
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return(1); |
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} |
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|
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|
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extern int |
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gmtval( /* convert GMT date line to UTC */ |
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time_t *tloc, |
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char *s |
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) |
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{ |
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struct tm tms; |
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const char *cp = GMTSTR; |
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|
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while (*cp) if (*cp++ != *s++) return(0); |
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while (isspace(*s)) s++; |
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if (!*s) return(0); |
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if (sscanf(s, "%d:%d:%d %d:%d:%d", |
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&tms.tm_year, &tms.tm_mon, &tms.tm_mday, |
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&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6) |
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return(0); |
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if (tloc == NULL) |
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return(1); |
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tms.tm_mon--; |
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tms.tm_year -= 1900; |
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*tloc = timegm(&tms); |
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return(1); |
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} |
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|
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|
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extern void |
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fputdate( /* write out the given time value (local & GMT) */ |
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time_t tv, |
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FILE *fp |
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) |
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{ |
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struct tm *tms; |
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|
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tms = localtime(&tv); |
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if (tms != NULL) |
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fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", TMSTR, |
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tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday, |
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tms->tm_hour, tms->tm_min, tms->tm_sec); |
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tms = gmtime(&tv); |
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if (tms != NULL) |
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fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", GMTSTR, |
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tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday, |
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tms->tm_hour, tms->tm_min, tms->tm_sec); |
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} |
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|
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|
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extern void |
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fputnow( /* write out the current time */ |
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FILE *fp |
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) |
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{ |
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time_t tv; |
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time(&tv); |
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fputdate(tv, fp); |
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} |
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|
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|
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extern void |
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printargs( /* print arguments to a file */ |
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int ac, |
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char **av, |
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FILE *fp |
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) |
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{ |
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while (ac-- > 0) { |
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fputword(*av++, fp); |
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fputc(ac ? ' ' : '\n', fp); |
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} |
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} |
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|
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|
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extern int |
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formatval( /* get format value (return true if format) */ |
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char *r, |
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char *s |
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) |
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{ |
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const char *cp = FMTSTR; |
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|
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while (*cp) if (*cp++ != *s++) return(0); |
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while (isspace(*s)) s++; |
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if (!*s) return(0); |
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if (r == NULL) return(1); |
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do |
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*r++ = *s++; |
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while(*s && !isspace(*s)); |
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*r = '\0'; |
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return(1); |
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} |
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|
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|
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fputformat(s, fp) /* put out a format value */ |
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char *s; |
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FILE *fp; |
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extern void |
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fputformat( /* put out a format value */ |
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char *s, |
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FILE *fp |
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) |
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{ |
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fputs(FMTSTR, fp); |
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fputs(s, fp); |
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} |
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getheader(fp, f, p) /* get header from file */ |
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FILE *fp; |
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int (*f)(); |
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char *p; |
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extern int |
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getheader( /* get header from file */ |
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FILE *fp, |
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gethfunc *f, |
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void *p |
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) |
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{ |
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char buf[MAXLINE]; |
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for ( ; ; ) { |
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buf[MAXLINE-2] = '\n'; |
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if (fgets(buf, sizeof(buf), fp) == NULL) |
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if (fgets(buf, MAXLINE, fp) == NULL) |
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return(-1); |
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if (buf[0] == '\n') |
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return(0); |
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#ifdef MSDOS |
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if (buf[0] == '\r' && buf[1] == '\n') |
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return(0); |
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#endif |
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if (buf[MAXLINE-2] != '\n') { |
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ungetc(buf[MAXLINE-2], fp); /* prevent false end */ |
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buf[MAXLINE-2] = '\0'; |
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} |
224 |
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if (f != NULL) |
225 |
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(*f)(buf, p); |
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if (f != NULL && (*f)(buf, p) < 0) |
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return(-1); |
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} |
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} |
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|
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}; |
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|
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static |
237 |
< |
mycheck(s, cp) /* check a header line for format info. */ |
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char *s; |
239 |
< |
register struct check *cp; |
236 |
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static int |
237 |
> |
mycheck( /* check a header line for format info. */ |
238 |
> |
char *s, |
239 |
> |
void *cp |
240 |
> |
) |
241 |
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{ |
242 |
< |
if (!strncmp(s,FMTSTR,FMTSTRL)) |
243 |
< |
formatval(cp->fs, s); |
244 |
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else if (cp->fp != NULL) /* don't copy format info. */ |
245 |
< |
fputs(s, cp->fp); |
242 |
> |
if (!formatval(((struct check*)cp)->fs, s) |
243 |
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&& ((struct check*)cp)->fp != NULL) { |
244 |
> |
fputs(s, ((struct check*)cp)->fp); |
245 |
> |
} |
246 |
> |
return(0); |
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} |
248 |
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|
249 |
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|
250 |
< |
/* |
251 |
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* Copymatch(pat,str) checks pat for wildcards, and |
252 |
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* copies str into pat if there is a match (returning true). |
253 |
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*/ |
254 |
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|
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< |
#ifdef COPYMATCH |
121 |
< |
copymatch(pat, str) |
122 |
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char *pat, *str; |
250 |
> |
extern int |
251 |
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globmatch( /* check for match of s against pattern p */ |
252 |
> |
char *p, |
253 |
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char *s |
254 |
> |
) |
255 |
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{ |
256 |
< |
int docopy = 0; |
125 |
< |
register char *p = pat, *s = str; |
256 |
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int setmatch; |
257 |
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|
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do { |
259 |
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switch (*p) { |
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case '?': /* match any character */ |
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if (!*s++) |
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return(0); |
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docopy++; |
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break; |
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case '*': /* match any string */ |
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while (p[1] == '*') p++; |
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do |
267 |
< |
if ( (p[1] == '?' || p[1] == *s) |
268 |
< |
&& copymatch(p+1,s) ) { |
139 |
< |
strcpy(pat, str); |
267 |
> |
if ( (p[1]=='?' || p[1]==*s) && |
268 |
> |
globmatch(p+1,s) ) |
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return(1); |
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} |
270 |
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while (*s++); |
271 |
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return(0); |
272 |
+ |
case '[': /* character set */ |
273 |
+ |
setmatch = *s == *++p; |
274 |
+ |
if (!*p) |
275 |
+ |
return(0); |
276 |
+ |
while (*++p != ']') { |
277 |
+ |
if (!*p) |
278 |
+ |
return(0); |
279 |
+ |
if (*p == '-') { |
280 |
+ |
setmatch += p[-1] <= *s && *s <= p[1]; |
281 |
+ |
if (!*++p) |
282 |
+ |
break; |
283 |
+ |
} else |
284 |
+ |
setmatch += *p == *s; |
285 |
+ |
} |
286 |
+ |
if (!setmatch) |
287 |
+ |
return(0); |
288 |
+ |
s++; |
289 |
+ |
break; |
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case '\\': /* literal next */ |
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p++; |
292 |
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/* fall through */ |
297 |
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break; |
298 |
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} |
299 |
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} while (*p++); |
154 |
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if (docopy) |
155 |
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strcpy(pat, str); |
300 |
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return(1); |
301 |
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} |
158 |
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#else |
159 |
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#define copymatch(pat, s) (!strcmp(pat, s)) |
160 |
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#endif |
302 |
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|
303 |
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|
304 |
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/* |
305 |
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* Checkheader(fin,fmt,fout) returns a value of 1 if the input format |
306 |
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* matches the specification in fmt, 0 if no input format was found, |
307 |
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* and -1 if the input format does not match or there is an |
308 |
< |
* error reading the header. If fmt is NULL, then -1 is returned |
308 |
> |
* error reading the header. If fmt is empty, then -1 is returned |
309 |
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* if any input format is found (or there is an error), and 0 otherwise. |
310 |
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* If fmt contains any '*' or '?' characters, then checkheader |
311 |
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* does wildcard expansion and copies a matching result into fmt. |
312 |
< |
* Be sure that fmt is big enough to hold the match in such cases! |
312 |
> |
* Be sure that fmt is big enough to hold the match in such cases, |
313 |
> |
* and that it is not a static, read-only string! |
314 |
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* The input header (minus any format lines) is copied to fout |
315 |
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* if fout is not NULL. |
316 |
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*/ |
317 |
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|
318 |
< |
checkheader(fin, fmt, fout) |
319 |
< |
FILE *fin; |
320 |
< |
char *fmt; |
321 |
< |
FILE *fout; |
318 |
> |
extern int |
319 |
> |
checkheader( |
320 |
> |
FILE *fin, |
321 |
> |
char *fmt, |
322 |
> |
FILE *fout |
323 |
> |
) |
324 |
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{ |
325 |
|
struct check cdat; |
326 |
+ |
char *cp; |
327 |
|
|
328 |
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cdat.fp = fout; |
329 |
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cdat.fs[0] = '\0'; |
330 |
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if (getheader(fin, mycheck, &cdat) < 0) |
331 |
|
return(-1); |
332 |
< |
if (fmt == NULL && cdat.fs[0] != '\0') |
333 |
< |
return(-1); |
334 |
< |
if (cdat.fs[0] != '\0') |
335 |
< |
return(copymatch(fmt, cdat.fs) ? 1 : -1); |
336 |
< |
return(0); |
332 |
> |
if (!cdat.fs[0]) |
333 |
> |
return(0); |
334 |
> |
for (cp = fmt; *cp; cp++) /* check for globbing */ |
335 |
> |
if ((*cp == '?') | (*cp == '*')) { |
336 |
> |
if (globmatch(fmt, cdat.fs)) { |
337 |
> |
strcpy(fmt, cdat.fs); |
338 |
> |
return(1); |
339 |
> |
} else |
340 |
> |
return(-1); |
341 |
> |
} |
342 |
> |
return(strcmp(fmt, cdat.fs) ? -1 : 1); /* literal match */ |
343 |
|
} |