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#ifndef lint |
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static const char RCSid[] = "$Id: hfio.c,v 1.2 2003/03/10 19:38:19 greg Exp $"; |
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#endif |
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/* |
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* Human-readable file I/O |
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*/ |
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|
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|
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#include "meta.h" |
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|
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|
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|
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static PRIMITIVE peof = {PEOF, 0200, -1, -1, -1, -1, NULL}; |
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|
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|
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readp(p, fp) /* get human-readable primitive */ |
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|
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PRIMITIVE *p; |
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FILE *fp; |
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|
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{ |
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char inbuf[MAXARGS]; |
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register int c, nargs; |
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int tmp; |
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|
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if (fp == NULL) fp = stdin; |
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|
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restart: |
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|
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if ((c = getc(fp)) == EOF) { /* used to be fatal */ |
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mcopy((char *)p, (char *)&peof, sizeof(PRIMITIVE)); |
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return(0); |
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} |
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|
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if (c == CDELIM) { /* skip user comment */ |
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fgets(inbuf, MAXARGS, fp); |
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goto restart; |
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} else if (c == '\n') /* skip empty line */ |
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goto restart; |
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|
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if (!iscom(c)) |
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error(USER, "bad command in readp"); |
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|
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p->com = c; |
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|
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fscanf(fp, "%o", &tmp); |
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p->arg0 = tmp & 0377; |
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|
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if (isglob(c)) |
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p->xy[XMN] = p->xy[YMN] = p->xy[XMX] = p->xy[YMX] = -1; |
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else if (fscanf(fp, "%d %d %d %d", &p->xy[XMN], &p->xy[YMN], |
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&p->xy[XMX], &p->xy[YMX]) != 4) |
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error(USER, "missing extent in readp"); |
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|
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while ((c = getc(fp)) != EOF && c != '\n' && c != ADELIM); |
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|
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nargs = 0; |
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|
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if (c == ADELIM) |
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while ((c = getc(fp)) != EOF && c != '\n' && nargs < MAXARGS-1) |
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inbuf[nargs++] = c; |
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|
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if (nargs >= MAXARGS) |
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error(USER, "too many arguments in readp"); |
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|
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if (nargs) { |
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inbuf[nargs] = '\0'; |
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p->args = savestr(inbuf); |
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} |
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else |
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p->args = NULL; |
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|
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return(p->com != PEOF); |
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} |
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|
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|
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|
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|
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|
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writep(p, fp) /* print primitive in human-readable form */ |
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|
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register PRIMITIVE *p; |
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FILE *fp; |
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|
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{ |
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|
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if (fp == NULL) fp = stdout; |
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|
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if (!iscom(p->com)) |
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error(USER, "bad command in writep"); |
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|
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fprintf(fp, "%c ", p->com); |
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if (isprim(p->com)) { |
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fprintf(fp, "%3o ", p->arg0 & 0177); |
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fprintf(fp, "%5d %5d %5d %5d ", p->xy[XMN], p->xy[YMN], p->xy[XMX], p->xy[YMX]); |
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} else |
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fprintf(fp, "%3o ", p->arg0); |
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|
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if (p->args != NULL) { |
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putc(ADELIM, fp); |
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fputs(p->args, fp); |
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} |
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|
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putc('\n', fp); |
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|
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if (p->com == PDRAW || p->com == PEOF) |
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if (fflush(fp) == -1) |
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error(SYSTEM, "error detected writing file in writep"); |
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|
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} |
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|
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|
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|
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|
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writeof(fp) /* write end of file command to fp */ |
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|
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FILE *fp; |
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|
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{ |
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|
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writep(&peof, fp); |
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|
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} |
