- printf shouldn't bail out if a conversion fails, it should just keep
processing them. - \c escape to immediately stop output (similar to echo's \c) - \0NNN should be allowed for octal character escapes (instead of just \NNN) - %b conversion, which is like %s but interprets \n \t etc. inside the string is missing. And I may not be any poet, but in lieu of an in-tree regression test: ref5% ./printf '%s%b%b%c%s%d\n' 'PR' '\0072' '\t' '3' '56' 0x10 PR: 35616 Submitted by: tjr MFC after: 1 week
This commit is contained in:
parent
055c131503
commit
ab5a295bdc
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=95300
@ -62,7 +62,8 @@ The
|
||||
.Ar arguments
|
||||
after the first are treated as strings if the corresponding format is
|
||||
either
|
||||
.Cm c
|
||||
.Cm c ,
|
||||
.Cm b
|
||||
or
|
||||
.Cm s ;
|
||||
otherwise it is evaluated as a C constant, with the following extensions:
|
||||
@ -71,8 +72,8 @@ otherwise it is evaluated as a C constant, with the following extensions:
|
||||
.It
|
||||
A leading plus or minus sign is allowed.
|
||||
.It
|
||||
If the leading character is a single or double quote, or not a digit,
|
||||
plus, or minus sign, the value is the ASCII code of the next character.
|
||||
If the leading character is a single or double quote the value is the ASCII
|
||||
code of the next character.
|
||||
.El
|
||||
.Pp
|
||||
The format string is reused as often as necessary to satisfy the
|
||||
@ -81,7 +82,8 @@ Any extra format specifications are evaluated with zero or the null
|
||||
string.
|
||||
.Pp
|
||||
Character escape sequences are in backslash notation as defined in the
|
||||
.St -ansiC .
|
||||
.St -ansiC ,
|
||||
with extensions.
|
||||
The characters and their meanings
|
||||
are as follows:
|
||||
.Pp
|
||||
@ -90,6 +92,8 @@ are as follows:
|
||||
Write a <bell> character.
|
||||
.It Cm \eb
|
||||
Write a <backspace> character.
|
||||
.It Cm \ec
|
||||
Ignore remaining characters in this string.
|
||||
.It Cm \ef
|
||||
Write a <form-feed> character.
|
||||
.It Cm \en
|
||||
@ -105,6 +109,7 @@ Write a <single quote> character.
|
||||
.It Cm \e\e
|
||||
Write a backslash character.
|
||||
.It Cm \e Ns Ar num
|
||||
.It Cm \e0 Ns Ar num
|
||||
Write an 8-bit character whose
|
||||
.Tn ASCII
|
||||
value is the 1-, 2-, or 3-digit
|
||||
@ -187,7 +192,7 @@ from a string; if the digit string is missing, the precision is treated
|
||||
as zero;
|
||||
.It Format:
|
||||
A character which indicates the type of format to use (one of
|
||||
.Cm diouxXfwEgGcs ) .
|
||||
.Cm diouxXfwEgGcsb ) .
|
||||
.El
|
||||
.Pp
|
||||
A field width or precision may be
|
||||
@ -244,6 +249,11 @@ Characters from the string
|
||||
are printed until the end is reached or until the number of characters
|
||||
indicated by the precision specification is reached; however if the
|
||||
precision is 0 or missing, all characters in the string are printed.
|
||||
.It Cm b
|
||||
As for
|
||||
.Cm s ,
|
||||
but interpret character escapes in backslash notation in the string
|
||||
.Ar argument .
|
||||
.It Cm \&%
|
||||
Print a `%'; no argument is used.
|
||||
.El
|
||||
@ -257,8 +267,20 @@ a field; padding takes place only if the specified field width exceeds
|
||||
the actual width.
|
||||
.Sh DIAGNOSTICS
|
||||
.Ex -std
|
||||
.Sh COMPATIBILITY
|
||||
The traditional
|
||||
.Bx
|
||||
behavior of converting arguments of numeric formats not beginning
|
||||
with a digit to the ASCII code of the first characer is not supported.
|
||||
.Sh SEE ALSO
|
||||
.Xr echo 1 ,
|
||||
.Xr printf 3
|
||||
.Sh STANDARDS
|
||||
The
|
||||
.Nm
|
||||
command is expected to be compatible with the
|
||||
.St -p1003.2
|
||||
specification.
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
|
@ -89,7 +89,7 @@ static const char rcsid[] =
|
||||
}
|
||||
|
||||
static int asciicode(void);
|
||||
static void escape(char *);
|
||||
static int escape(char *);
|
||||
static int getchr(void);
|
||||
static double getdouble(void);
|
||||
static int getint(int *);
|
||||
@ -110,7 +110,7 @@ main(argc, argv)
|
||||
char *argv[];
|
||||
{
|
||||
static const char *skip1, *skip2;
|
||||
int ch, end, fieldwidth, precision;
|
||||
int ch, chopped, end, fieldwidth, precision;
|
||||
char convch, nextch, *format, *fmt, *start;
|
||||
|
||||
#ifndef BUILTIN
|
||||
@ -142,7 +142,7 @@ main(argc, argv)
|
||||
skip1 = "#-+ 0";
|
||||
skip2 = "0123456789";
|
||||
|
||||
escape(fmt = format = *argv); /* backslash interpretation */
|
||||
chopped = escape(fmt = format = *argv); /* backslash interpretation */
|
||||
gargv = ++argv;
|
||||
for (;;) {
|
||||
end = 0;
|
||||
@ -150,6 +150,10 @@ main(argc, argv)
|
||||
next: for (start = fmt;; ++fmt) {
|
||||
if (!*fmt) {
|
||||
/* avoid infinite loop */
|
||||
if (chopped) {
|
||||
(void)printf("%s", start);
|
||||
return (0);
|
||||
}
|
||||
if (end == 1) {
|
||||
warnx1("missing format character",
|
||||
NULL, NULL);
|
||||
@ -209,6 +213,21 @@ next: for (start = fmt;; ++fmt) {
|
||||
nextch = *++fmt;
|
||||
*fmt = '\0';
|
||||
switch(convch) {
|
||||
case 'b': {
|
||||
char *p;
|
||||
int getout;
|
||||
|
||||
if ((p = strdup(getstr())) == NULL)
|
||||
err(1, NULL);
|
||||
getout = escape(p);
|
||||
*(fmt - 1) = 's';
|
||||
PF(start, p)
|
||||
*(fmt - 1) = 'b';
|
||||
free(p);
|
||||
if (getout)
|
||||
return (0);
|
||||
break;
|
||||
}
|
||||
case 'c': {
|
||||
char p;
|
||||
|
||||
@ -227,11 +246,10 @@ next: for (start = fmt;; ++fmt) {
|
||||
quad_t p;
|
||||
char *f;
|
||||
|
||||
if ((f = mklong(start, convch)) == NULL)
|
||||
return (1);
|
||||
if (getquad(&p))
|
||||
return (1);
|
||||
PF(f, p);
|
||||
if ((f = mklong(start, convch)) != NULL &&
|
||||
!getquad(&p)) {
|
||||
PF(f, p);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case 'e': case 'E': case 'f': case 'g': case 'G': {
|
||||
@ -280,7 +298,7 @@ mklong(str, ch)
|
||||
return (copy);
|
||||
}
|
||||
|
||||
static void
|
||||
static int
|
||||
escape(fmt)
|
||||
register char *fmt;
|
||||
{
|
||||
@ -296,7 +314,7 @@ escape(fmt)
|
||||
case '\0': /* EOS, user error */
|
||||
*store = '\\';
|
||||
*++store = '\0';
|
||||
return;
|
||||
return (0);
|
||||
case '\\': /* backslash */
|
||||
case '\'': /* single quote */
|
||||
*store = *fmt;
|
||||
@ -307,6 +325,9 @@ escape(fmt)
|
||||
case 'b': /* backspace */
|
||||
*store = '\b';
|
||||
break;
|
||||
case 'c':
|
||||
*store = '\0';
|
||||
return (1);
|
||||
case 'f': /* form-feed */
|
||||
*store = '\f';
|
||||
break;
|
||||
@ -325,7 +346,7 @@ escape(fmt)
|
||||
/* octal constant */
|
||||
case '0': case '1': case '2': case '3':
|
||||
case '4': case '5': case '6': case '7':
|
||||
for (c = 3, value = 0;
|
||||
for (c = *fmt == '0' ? 4 : 3, value = 0;
|
||||
c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
|
||||
value <<= 3;
|
||||
value += *fmt - '0';
|
||||
@ -339,6 +360,7 @@ escape(fmt)
|
||||
}
|
||||
}
|
||||
*store = '\0';
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
@ -357,7 +379,6 @@ getstr()
|
||||
return (*gargv++);
|
||||
}
|
||||
|
||||
static const char *Number = "+-.0123456789";
|
||||
static int
|
||||
getint(ip)
|
||||
int *ip;
|
||||
@ -366,10 +387,8 @@ getint(ip)
|
||||
|
||||
if (getquad(&val))
|
||||
return (1);
|
||||
if (val < INT_MIN || val > INT_MAX) {
|
||||
if (val < INT_MIN || val > INT_MAX)
|
||||
warnx3("%s: %s", *gargv, strerror(ERANGE));
|
||||
return (1);
|
||||
}
|
||||
*ip = (int)val;
|
||||
return (0);
|
||||
}
|
||||
@ -385,39 +404,49 @@ getquad(lp)
|
||||
*lp = 0;
|
||||
return (0);
|
||||
}
|
||||
if (strchr(Number, **gargv)) {
|
||||
errno = 0;
|
||||
val = strtoq(*gargv, &ep, 0);
|
||||
if (*ep != '\0') {
|
||||
warnx2("%s: illegal number", *gargv, NULL);
|
||||
return (1);
|
||||
}
|
||||
if (errno == ERANGE)
|
||||
if (val == QUAD_MAX) {
|
||||
warnx3("%s: %s", *gargv, strerror(ERANGE));
|
||||
return (1);
|
||||
}
|
||||
if (val == QUAD_MIN) {
|
||||
warnx3("%s: %s", *gargv, strerror(ERANGE));
|
||||
return (1);
|
||||
}
|
||||
|
||||
*lp = val;
|
||||
++gargv;
|
||||
if (**gargv == '"' || **gargv == '\'') {
|
||||
*lp = (quad_t)asciicode();
|
||||
return (0);
|
||||
}
|
||||
*lp = (long)asciicode();
|
||||
|
||||
errno = 0;
|
||||
val = strtoq(*gargv, &ep, 0);
|
||||
if (ep == *gargv)
|
||||
warnx2("%s: expected numeric value", *gargv, NULL);
|
||||
else if (*ep != '\0')
|
||||
warnx2("%s: not completely converted", *gargv, NULL);
|
||||
if (errno == ERANGE)
|
||||
warnx3("%s: %s", *gargv, strerror(ERANGE));
|
||||
*lp = val;
|
||||
++gargv;
|
||||
return (0);
|
||||
}
|
||||
|
||||
static double
|
||||
getdouble()
|
||||
{
|
||||
double val;
|
||||
char *ep;
|
||||
|
||||
if (!*gargv)
|
||||
return ((double)0);
|
||||
if (strchr(Number, **gargv))
|
||||
return (atof(*gargv++));
|
||||
return ((double)asciicode());
|
||||
|
||||
if (**gargv == '"' || **gargv == '\'') {
|
||||
val = (double)asciicode();
|
||||
return (val);
|
||||
}
|
||||
|
||||
errno = 0;
|
||||
val = strtod(*gargv, &ep);
|
||||
if (ep == *gargv)
|
||||
warnx2("%s: expected numeric value", *gargv, NULL);
|
||||
else if (*ep != '\0')
|
||||
warnx2("%s: not completely converted", *gargv, NULL);
|
||||
if (errno == ERANGE)
|
||||
warnx3("%s: %s", *gargv, strerror(ERANGE));
|
||||
++gargv;
|
||||
return (val);
|
||||
}
|
||||
|
||||
static int
|
||||
|
Loading…
Reference in New Issue
Block a user