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greg |
1.1 |
#ifndef lint
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schorsch |
1.3 |
static const char RCSid[] = "$Id: hfio.c,v 1.2 2003/03/10 19:38:19 greg Exp $";
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greg |
1.1 |
#endif
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/*
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* Human-readable file I/O
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*/
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#include "meta.h"
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static PRIMITIVE peof = {PEOF, 0200, -1, -1, -1, -1, NULL};
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readp(p, fp) /* get human-readable primitive */
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PRIMITIVE *p;
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FILE *fp;
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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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if (fp == NULL) fp = stdin;
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restart:
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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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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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if (!iscom(c))
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error(USER, "bad command in readp");
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p->com = c;
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fscanf(fp, "%o", &tmp);
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p->arg0 = tmp & 0377;
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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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while ((c = getc(fp)) != EOF && c != '\n' && c != ADELIM);
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nargs = 0;
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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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if (nargs >= MAXARGS)
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error(USER, "too many arguments in readp");
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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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return(p->com != PEOF);
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}
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writep(p, fp) /* print primitive in human-readable form */
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register PRIMITIVE *p;
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FILE *fp;
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{
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if (fp == NULL) fp = stdout;
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if (!iscom(p->com))
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error(USER, "bad command in writep");
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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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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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putc('\n', fp);
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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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writeof(fp) /* write end of file command to fp */
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FILE *fp;
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{
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writep(&peof, fp);
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}
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