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/* Copyright (c) 1988 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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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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*/ |
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|
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#include <stdio.h> |
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|
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#define MAXLINE 512 |
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|
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char FMTSTR[] = "FORMAT="; |
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int FMTSTRL = 7; |
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|
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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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{ |
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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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putc('\n', fp); |
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} |
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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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{ |
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return(!strncmp(s,FMTSTR,FMTSTRL)); |
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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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{ |
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s += FMTSTRL; |
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while (*s && *s != '\n') |
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*r++ = *s++; |
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*r = '\0'; |
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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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{ |
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fputs(FMTSTR, 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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|
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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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{ |
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char buf[MAXLINE]; |
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|
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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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return(-1); |
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if (buf[0] == '\n') |
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return(0); |
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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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} |
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if (f != NULL) |
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(*f)(buf, p); |
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} |
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} |
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|
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|
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struct check { |
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FILE *fp; |
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char fs[32]; |
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}; |
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|
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|
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static |
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mycheck(s, cp) /* check a header line for format info. */ |
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char *s; |
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register struct check *cp; |
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{ |
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if (!strncmp(s,FMTSTR,FMTSTRL)) |
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formatval(cp->fs, s); |
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else if (cp->fp != NULL) /* don't copy format info. */ |
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fputs(s, cp->fp); |
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} |
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|
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|
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checkheader(fin, fmt, fout) /* check data format in header */ |
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FILE *fin; |
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char *fmt; |
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FILE *fout; |
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{ |
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struct check cdat; |
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|
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cdat.fp = fout; |
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cdat.fs[0] = '\0'; |
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if (getheader(fin, mycheck, &cdat) < 0) |
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return(-1); |
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if (fmt != NULL && cdat.fs[0] != '\0') |
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return(strcmp(fmt, cdat.fs) ? -1 : 1); |
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return(0); |
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} |
