コード例 #1
0
ファイル: parse.c プロジェクト: 0xffea/MINIX3
void
rewrite(FS *fs)
{
	enum { NOTOKAY, USEBCNT, USEPREC } sokay;
	PR *pr, **nextpr;
	FU *fu;
	char *p1, *p2;
	char savech, *fmtp, cs[sizeof(PRId64)];
	int nconv, prec;

	prec = 0;
	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		/*
		 * Break each format unit into print units; each conversion
		 * character gets its own.
		 */
		nextpr = &fu->nextpr;
		for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
			pr = ecalloc(1, sizeof(*pr));
			*nextpr = pr;

			/* Skip preceding text and up to the next % sign. */
			for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);

			/* Only text in the string. */
			if (!*p1) {
				pr->fmt = fmtp;
				pr->flags = F_TEXT;
				break;
			}

			/*
			 * Get precision for %s -- if have a byte count, don't
			 * need it.
			 */
			if (fu->bcnt) {
				sokay = USEBCNT;
				/* Skip to conversion character. */
				for (++p1; *p1 && strchr(spec, *p1); ++p1);
			} else {
				/* Skip any special chars, field width. */
				while (*++p1 && strchr(spec + 1, *p1));
				if (*p1 == '.' &&
				    isdigit((unsigned char)*++p1)) {
					sokay = USEPREC;
					prec = atoi(p1);
					while (isdigit((unsigned char)*++p1))
						continue;
				} else
					sokay = NOTOKAY;
			}

			p2 = *p1 ? p1 + 1 : p1;	/* Set end pointer. */
			cs[0] = *p1;		/* Set conversion string. */
			cs[1] = '\0';

			/*
			 * Figure out the byte count for each conversion;
			 * rewrite the format as necessary, set up blank-
			 * padding for end of data.
			 */
			switch(cs[0]) {
			case 'c':
				pr->flags = F_CHAR;
				switch(fu->bcnt) {
				case 0: case 1:
					pr->bcnt = 1;
					break;
				default:
					p1[1] = '\0';
					badcnt(p1);
				}
				break;
			case 'd': case 'i':
				pr->flags = F_INT;
				goto isint;
			case 'o': case 'u': case 'x': case 'X':
				pr->flags = F_UINT;
isint:
				/*
				 * Regardless of pr->bcnt, all integer
				 * values are cast to [u]int64_t before
				 * being printed by display().  We
				 * therefore need to use PRI?64 as the
				 * format, where '?' could actually
				 * be any of [diouxX].  We make the
				 * assumption (not guaranteed by the
				 * C99 standard) that we can derive
				 * all the other PRI?64 values from
				 * PRId64 simply by changing the last
				 * character.  For example, if PRId64 is
				 * "lld" or "qd", and cs[0] is 'o', then
				 * we end up with "llo" or "qo".
				 */
				savech = cs[0];
				strncpy(cs, PRId64, sizeof(PRId64) - 2);
				cs[sizeof(PRId64) - 2] = savech;
				cs[sizeof(PRId64) - 1] = '\0';
				switch(fu->bcnt) {
				case 0: case 4:
					pr->bcnt = 4;
					break;
				case 1:
					pr->bcnt = 1;
					break;
				case 2:
					pr->bcnt = 2;
					break;
				case 8:
					pr->bcnt = 8;
					break;
				default:
					p1[1] = '\0';
					badcnt(p1);
				}
				break;
			case 'e': case 'E': case 'f': case 'g': case 'G':
				pr->flags = F_DBL;
				switch(fu->bcnt) {
				case 0: case 8:
					pr->bcnt = 8;
					break;
				case 4:
					pr->bcnt = 4;
					break;
				default:
					p1[1] = '\0';
					badcnt(p1);
				}
				break;
			case 's':
				pr->flags = F_STR;
				switch(sokay) {
				case NOTOKAY:
					badsfmt();
				case USEBCNT:
					pr->bcnt = fu->bcnt;
					break;
				case USEPREC:
					pr->bcnt = prec;
					break;
				}
				break;
			case '_':
				++p2;
				switch(p1[1]) {
				case 'A':
					endfu = fu;
					fu->flags |= F_IGNORE;
					/* FALLTHROUGH */
				case 'a':
					pr->flags = F_ADDRESS;
					++p2;
					switch(p1[2]) {
					case 'd': case 'o': case'x':
						/*
						 * See comments above for
						 * the way we use PRId64.
						 */
						strncpy(cs, PRId64,
							sizeof(PRId64) - 2);
						cs[sizeof(PRId64) - 2] = p1[2];
						cs[sizeof(PRId64) - 1] = '\0';
						break;
					default:
						p1[3] = '\0';
						badconv(p1);
					}
					break;
				case 'c':
					pr->flags = F_C;
					/* cs[0] = 'c';	set in conv_c */
					goto isint2;
				case 'p':
					pr->flags = F_P;
					cs[0] = 'c';
					goto isint2;
				case 'u':
					pr->flags = F_U;
					/* cs[0] = 'c';	set in conv_u */
isint2:					switch(fu->bcnt) {
					case 0: case 1:
						pr->bcnt = 1;
						break;
					default:
						p1[2] = '\0';
						badcnt(p1);
					}
					break;
				default:
					p1[2] = '\0';
					badconv(p1);
				}
				break;
			default:
				p1[1] = '\0';
				badconv(p1);
			}

			/*
			 * Copy to PR format string, set conversion character
			 * pointer, update original.
			 */
			savech = *p2;
			p1[0] = '\0';
			pr->fmt = emalloc(strlen(fmtp) + strlen(cs) + 1);
			(void)strcpy(pr->fmt, fmtp);
			(void)strcat(pr->fmt, cs);
			*p2 = savech;
			pr->cchar = pr->fmt + (p1 - fmtp);
			fmtp = p2;

			/* Only one conversion character if byte count. */
			if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
				errx(1,
			    "byte count with multiple conversion characters");
		}
		/*
		 * If format unit byte count not specified, figure it out
		 * so can adjust rep count later.
		 */
		if (!fu->bcnt)
			for (pr = fu->nextpr; pr; pr = pr->nextpr)
				fu->bcnt += pr->bcnt;
	}
	/*
	 * If the format string interprets any data at all, and it's
	 * not the same as the blocksize, and its last format unit
	 * interprets any data at all, and has no iteration count,
	 * repeat it as necessary.
	 *
	 * If, rep count is greater than 1, no trailing whitespace
	 * gets output from the last iteration of the format unit.
	 */
	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		if (!fu->nextfu && fs->bcnt < blocksize &&
		    !(fu->flags&F_SETREP) && fu->bcnt)
			fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
		if (fu->reps > 1) {
			if (!fu->nextpr)
				break;
			for (pr = fu->nextpr;; pr = pr->nextpr)
				if (!pr->nextpr)
					break;
			for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
				p2 = isspace((unsigned char)*p1) ? p1 : NULL;
			if (p2)
				pr->nospace = p2;
		}
	}
#ifdef DEBUG
	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		(void)printf("fmt:");
		for (pr = fu->nextpr; pr; pr = pr->nextpr)
			(void)printf(" {%s}", pr->fmt);
		(void)printf("\n");
	}
#endif
}
コード例 #2
0
ファイル: parse.c プロジェクト: FreeBSDFoundation/freebsd
void
rewrite(FS *fs)
{
	enum { NOTOKAY, USEBCNT, USEPREC } sokay;
	PR *pr, **nextpr;
	FU *fu;
	unsigned char *p1, *p2, *fmtp;
	char savech, cs[3];
	int nconv, prec;

	prec = 0;

	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		/*
		 * Break each format unit into print units; each conversion
		 * character gets its own.
		 */
		nextpr = &fu->nextpr;
		for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
			if ((pr = calloc(1, sizeof(PR))) == NULL)
				err(1, NULL);
			*nextpr = pr;

			/* Skip preceding text and up to the next % sign. */
			for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);

			/* Only text in the string. */
			if (!*p1) {
				pr->fmt = fmtp;
				pr->flags = F_TEXT;
				break;
			}

			/*
			 * Get precision for %s -- if have a byte count, don't
			 * need it.
			 */
			if (fu->bcnt) {
				sokay = USEBCNT;
				/* Skip to conversion character. */
				while (*++p1 != 0 && strchr(spec, *p1) != NULL)
					;
				if (*p1 == 0)
					badnoconv();
			} else {
				/* Skip any special chars, field width. */
				while (*++p1 != 0 && strchr(spec + 1, *p1) != NULL)
					;
				if (*p1 == 0)
					badnoconv();
				if (*p1 == '.' && isdigit(*++p1)) {
					sokay = USEPREC;
					prec = atoi(p1);
					while (isdigit(*++p1));
				} else
					sokay = NOTOKAY;
			}

			p2 = *p1 ? p1 + 1 : p1;	/* Set end pointer -- make sure
						 * that it's non-NUL/-NULL first
						 * though. */
			cs[0] = *p1;		/* Set conversion string. */
			cs[1] = '\0';

			/*
			 * Figure out the byte count for each conversion;
			 * rewrite the format as necessary, set up blank-
			 * padding for end of data.
			 */
			switch(cs[0]) {
			case 'c':
				pr->flags = F_CHAR;
				switch(fu->bcnt) {
				case 0: case 1:
					pr->bcnt = 1;
					break;
				default:
					p1[1] = '\0';
					badcnt(p1);
				}
				break;
			case 'd': case 'i':
				pr->flags = F_INT;
				goto isint;
			case 'o': case 'u': case 'x': case 'X':
				pr->flags = F_UINT;
isint:				cs[2] = '\0';
				cs[1] = cs[0];
				cs[0] = 'q';
				switch(fu->bcnt) {
				case 0: case 4:
					pr->bcnt = 4;
					break;
				case 1:
					pr->bcnt = 1;
					break;
				case 2:
					pr->bcnt = 2;
					break;
				default:
					p1[1] = '\0';
					badcnt(p1);
				}
				break;
			case 'e': case 'E': case 'f': case 'g': case 'G':
				pr->flags = F_DBL;
				switch(fu->bcnt) {
				case 0: case 8:
					pr->bcnt = 8;
					break;
				case 4:
					pr->bcnt = 4;
					break;
				default:
					if (fu->bcnt == sizeof(long double)) {
						cs[2] = '\0';
						cs[1] = cs[0];
						cs[0] = 'L';
						pr->bcnt = sizeof(long double);
					} else {
						p1[1] = '\0';
						badcnt(p1);
					}
				}
				break;
			case 's':
				pr->flags = F_STR;
				switch(sokay) {
				case NOTOKAY:
					badsfmt();
				case USEBCNT:
					pr->bcnt = fu->bcnt;
					break;
				case USEPREC:
					pr->bcnt = prec;
					break;
				}
				break;
			case '_':
				++p2;
				switch(p1[1]) {
				case 'A':
					endfu = fu;
					fu->flags |= F_IGNORE;
					/* FALLTHROUGH */
				case 'a':
					pr->flags = F_ADDRESS;
					++p2;
					switch(p1[2]) {
					case 'd': case 'o': case'x':
						cs[0] = 'q';
						cs[1] = p1[2];
						cs[2] = '\0';
						break;
					default:
						p1[3] = '\0';
						badconv(p1);
					}
					break;
				case 'c':
					pr->flags = F_C;
					/* cs[0] = 'c';	set in conv_c */
					goto isint2;
				case 'p':
					pr->flags = F_P;
					cs[0] = 'c';
					goto isint2;
				case 'u':
					pr->flags = F_U;
					/* cs[0] = 'c';	set in conv_u */
isint2:					switch(fu->bcnt) {
					case 0: case 1:
						pr->bcnt = 1;
						break;
					default:
						p1[2] = '\0';
						badcnt(p1);
					}
					break;
				default:
					p1[2] = '\0';
					badconv(p1);
				}
				break;
			default:
				p1[1] = '\0';
				badconv(p1);
			}

			/*
			 * Copy to PR format string, set conversion character
			 * pointer, update original.
			 */
			savech = *p2;
			p1[0] = '\0';
			if (asprintf(&pr->fmt, "%s%s", fmtp, cs) == -1)
				err(1, NULL);
			*p2 = savech;
			pr->cchar = pr->fmt + (p1 - fmtp);
			fmtp = p2;

			/* Only one conversion character if byte count. */
			if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
	    errx(1, "byte count with multiple conversion characters");
		}
		/*
		 * If format unit byte count not specified, figure it out
		 * so can adjust rep count later.
		 */
		if (!fu->bcnt)
			for (pr = fu->nextpr; pr; pr = pr->nextpr)
				fu->bcnt += pr->bcnt;
	}
	/*
	 * If the format string interprets any data at all, and it's
	 * not the same as the blocksize, and its last format unit
	 * interprets any data at all, and has no iteration count,
	 * repeat it as necessary.
	 *
	 * If, rep count is greater than 1, no trailing whitespace
	 * gets output from the last iteration of the format unit.
	 */
	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		if (!fu->nextfu && fs->bcnt < blocksize &&
		    !(fu->flags&F_SETREP) && fu->bcnt)
			fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
		if (fu->reps > 1) {
			for (pr = fu->nextpr;; pr = pr->nextpr)
				if (!pr->nextpr)
					break;
			for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
				p2 = isspace(*p1) ? p1 : NULL;
			if (p2)
				pr->nospace = p2;
		}
	}
#ifdef DEBUG
	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
		(void)printf("fmt:");
		for (pr = fu->nextpr; pr; pr = pr->nextpr)
			(void)printf(" {%s}", pr->fmt);
		(void)printf("\n");
	}
#endif
}