/*
* Print SysV echo(1) style escape string
* Halts processing string if a \c escape is encountered.
*/
static char *
conv_escape_str(char *str)
{
int ch;
char *cp;
/* convert string into a temporary buffer... */
STARTSTACKSTR(cp);
do {
int c;
ch = *str++;
if (ch != '\\')
continue;
ch = *str++;
if (ch == 'c') {
/* \c as in SYSV echo - abort all processing.... */
rval |= 0x100;
ch = 0;
continue;
}
/*
* %b string octal constants are not like those in C.
* They start with a \0, and are followed by 0, 1, 2,
* or 3 octal digits.
*/
if (ch == '0') {
unsigned char i;
i = 3;
ch = 0;
do {
unsigned k = octtobin(*str);
if (k > 7)
break;
str++;
ch <<= 3;
ch += k;
} while (--i);
continue;
}
/* Finally test for sequences valid in the format string */
str = conv_escape(str - 1, &c);
ch = c;
} while (STPUTC(ch, cp), ch);
return stackblock();
}
int printfcmd(int argc, char *argv[])
{
char *fmt;
char *format;
int ch;
rval = 0;
nextopt(nullstr);
argv = argptr;
format = *argv;
if (!format) {
warnx("usage: printf format [arg ...]");
goto err;
}
gargv = ++argv;
#define SKIP1 "#-+ 0"
#define SKIP2 "*0123456789"
do {
/*
* Basic algorithm is to scan the format string for conversion
* specifications -- once one is found, find out if the field
* width or precision is a '*'; if it is, gather up value.
* Note, format strings are reused as necessary to use up the
* provided arguments, arguments of zero/null string are
* provided to use up the format string.
*/
/* find next format specification */
for (fmt = format; (ch = *fmt++) ;) {
char *start;
char nextch;
int array[2];
int *param;
if (ch == '\\') {
int c_ch;
fmt = conv_escape(fmt, &c_ch);
ch = c_ch;
goto pc;
}
if (ch != '%' || (*fmt == '%' && (++fmt || 1))) {
pc:
blt_putchar(ch);
continue;
}
/* Ok - we've found a format specification,
Save its address for a later blt_printf(). */
start = fmt - 1;
param = array;
/* skip to field width */
fmt += strspn(fmt, SKIP1);
if (*fmt == '*')
*param++ = getintmax();
/* skip to possible '.', get following precision */
fmt += strspn(fmt, SKIP2);
if (*fmt == '.')
++fmt;
if (*fmt == '*')
*param++ = getintmax();
fmt += strspn(fmt, SKIP2);
ch = *fmt;
if (!ch) {
warnx("missing format character");
goto err;
}
/* null terminate format string to we can use it
as an argument to printf. */
nextch = fmt[1];
fmt[1] = 0;
switch (ch) {
case 'b': {
int done = conv_escape_str(getstr());
char *p = stackblock();
*fmt = 's';
PF(start, p);
/* escape if a \c was encountered */
if (done)
goto out;
*fmt = 'b';
break;
}
case 'c': {
int p = getchr();
PF(start, p);
break;
}
case 's': {
char *p = getstr();
PF(start, p);
break;
}
case 'd':
case 'i': {
intmax_t p = getintmax();
char *f = mklong(start, fmt);
PF(f, p);
break;
}
case 'o':
case 'u':
case 'x':
case 'X': {
uintmax_t p = getuintmax();
char *f = mklong(start, fmt);
PF(f, p);
break;
}
case 'e':
case 'E':
case 'f':
case 'g':
case 'G': {
double p = getdouble();
PF(start, p);
break;
}
default:
warnx("%s: invalid directive", start);
goto err;
}
*++fmt = nextch;
}
} while (gargv != argv && *gargv);
out:
return rval;
err:
return 1;
}
/*
* Print SysV echo(1) style escape string
* Halts processing string if a \c escape is encountered.
*/
static void
conv_escape_str(char *str, void (*do_putchar)(int))
{
int value;
int ch;
char c;
while ((ch = *str++) != '\0') {
if (ch != '\\') {
do_putchar(ch);
continue;
}
ch = *str++;
if (ch == 'c') {
/* \c as in SYSV echo - abort all processing.... */
rval |= 0x100;
break;
}
/*
* %b string octal constants are not like those in C.
* They start with a \0, and are followed by 0, 1, 2,
* or 3 octal digits.
*/
if (ch == '0') {
int octnum = 0, i;
for (i = 0; i < 3; i++) {
if (!isdigit((unsigned char)*str) || *str > '7')
break;
octnum = (octnum << 3) | (*str++ - '0');
}
do_putchar(octnum);
continue;
}
/* \[M][^|-]C as defined by vis(3) */
if (ch == 'M' && *str == '-') {
do_putchar(0200 | str[1]);
str += 2;
continue;
}
if (ch == 'M' && *str == '^') {
str++;
value = 0200;
ch = '^';
} else
value = 0;
if (ch == '^') {
ch = *str++;
if (ch == '?')
value |= 0177;
else
value |= ch & 037;
do_putchar(value);
continue;
}
/* Finally test for sequences valid in the format string */
str = conv_escape(str - 1, &c);
do_putchar(c);
}
}
int main(int argc, char *argv[])
{
char *fmt, *start;
int fieldwidth, precision;
char nextch;
char *format;
int ch;
int error;
#if !defined(SHELL) && !defined(BUILTIN)
(void)setlocale (LC_ALL, "");
#endif
while ((ch = getopt(argc, argv, "")) != -1) {
switch (ch) {
case '?':
default:
usage();
return 1;
}
}
argc -= optind;
argv += optind;
if (argc < 1) {
usage();
return 1;
}
format = *argv;
gargv = ++argv;
#define SKIP1 "#-+ 0"
#define SKIP2 "0123456789"
do {
/*
* Basic algorithm is to scan the format string for conversion
* specifications -- once one is found, find out if the field
* width or precision is a '*'; if it is, gather up value.
* Note, format strings are reused as necessary to use up the
* provided arguments, arguments of zero/null string are
* provided to use up the format string.
*/
/* find next format specification */
for (fmt = format; (ch = *fmt++) != '\0';) {
if (ch == '\\') {
char c_ch;
fmt = conv_escape(fmt, &c_ch);
putchar(c_ch);
continue;
}
if (ch != '%' || (*fmt == '%' && ++fmt)) {
(void)putchar(ch);
continue;
}
/* Ok - we've found a format specification,
Save its address for a later printf(). */
start = fmt - 1;
/* skip to field width */
fmt += strspn(fmt, SKIP1);
if (*fmt == '*') {
fmt++;
fieldwidth = getwidth();
} else
fieldwidth = -1;
/* skip to possible '.', get following precision */
fmt += strspn(fmt, SKIP2);
if (*fmt == '.') {
fmt++;
if (*fmt == '*') {
fmt++;
precision = getwidth();
} else
precision = -1;
} else
precision = -1;
fmt += strspn(fmt, SKIP2);
ch = *fmt;
if (!ch) {
warnx("missing format character");
return (1);
}
/* null terminate format string to we can use it
as an argument to printf. */
nextch = fmt[1];
fmt[1] = 0;
switch (ch) {
case 'B': {
const char *p = conv_expand(getstr());
if (p == NULL)
goto out;
*fmt = 's';
PF(start, p);
if (error < 0)
goto out;
break;
}
case 'b': {
/* There has to be a better way to do this,
* but the string we generate might have
* embedded nulls. */
static char *a, *t;
char *cp = getstr();
/* Free on entry in case shell longjumped out */
if (a != NULL)
free(a);
a = NULL;
if (t != NULL)
free(t);
t = NULL;
/* Count number of bytes we want to output */
b_length = 0;
conv_escape_str(cp, b_count);
t = malloc(b_length + 1);
if (t == NULL)
goto out;
(void)memset(t, 'x', b_length);
t[b_length] = 0;
/* Get printf to calculate the lengths */
*fmt = 's';
abort();
/* APF(&a, start, t); */
if (error == -1)
goto out;
b_fmt = a;
/* Output leading spaces and data bytes */
conv_escape_str(cp, b_output);
/* Add any trailing spaces */
printf("%s", b_fmt);
break;
}
case 'c': {
char p = getchr();
PF(start, p);
if (error < 0)
goto out;
break;
}
case 's': {
char *p = getstr();
PF(start, p);
if (error < 0)
goto out;
break;
}
case 'd':
case 'i': {
intmax_t p = getintmax();
char *f = mklong(start, ch);
PF(f, p);
if (error < 0)
goto out;
break;
}
case 'o':
case 'u':
case 'x':
case 'X': {
uintmax_t p = getuintmax();
char *f = mklong(start, ch);
PF(f, p);
if (error < 0)
goto out;
break;
}
case 'e':
case 'E':
case 'f':
case 'g':
case 'G': {
double p = getdouble();
PF(start, p);
if (error < 0)
goto out;
break;
}
default:
warnx("%s: invalid directive", start);
return 1;
}
*fmt++ = ch;
*fmt = nextch;
/* escape if a \c was encountered */
if (rval & 0x100)
return rval & ~0x100;
}
} while (gargv != argv && *gargv);
return rval & ~0x100;
out:
warn("print failed");
return 1;
}
