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authorRoland McGrath <roland@gnu.org>1995-03-18 20:44:21 +0000
committerRoland McGrath <roland@gnu.org>1995-03-18 20:44:21 +0000
commitbe69ea41ebade5819509b32e1b41ce1853392611 (patch)
tree0371b8fbbefb4703b76542407c265fbc3b79d3bb /stdio
parenta38f13baf0fd4ee63833371bb867bcd09bb866c9 (diff)
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Sat Mar 18 14:07:08 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* stdio/vfscanf.c: Grok positional parameter specs (i.e. %3$d means %d from 3rd arg). * sysdeps/mach/hurd/closedir.c: Include hurd/fd.h. * stdlib/strtol.c: If !GROUP, set END to null. In loop, test only END, not GROUP.
Diffstat (limited to 'stdio')
-rw-r--r--stdio/vfscanf.c75
1 files changed, 54 insertions, 21 deletions
diff --git a/stdio/vfscanf.c b/stdio/vfscanf.c
index 9a9e3bb..cacf16f 100644
--- a/stdio/vfscanf.c
+++ b/stdio/vfscanf.c
@@ -60,7 +60,7 @@ DEFUN(__vfscanf, (s, format, arg),
int group_flag; /* %' modifier flag. */
/* Type modifiers. */
- char is_short, is_long, is_long_double;
+ int is_short, is_long, is_long_double;
#ifdef HAVE_LONGLONG
/* We use the `L' modifier for `long long int'. */
#define is_longlong is_long_double
@@ -108,6 +108,18 @@ DEFUN(__vfscanf, (s, format, arg),
/* Run through the format string. */
while (*f != '\0')
{
+ unsigned int argpos;
+ /* Extract the next argument, which is of type TYPE.
+ For a %N$... spec, this is the Nth argument from the beginning;
+ otherwise it is the next argument after the state now in ARG. */
+#define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
+ ({ unsigned int pos = argpos; \
+ va_list arg = (va_list) argptr; \
+ while (--pos > 0) \
+ (void) va_arg (arg, void *); \
+ va_arg (arg, type); \
+ }))
+
if (!isascii (*f))
{
/* Non-ASCII, may be a multibyte. */
@@ -145,9 +157,30 @@ DEFUN(__vfscanf, (s, format, arg),
continue;
}
- /* Check for the assignment-suppressant and the number grouping flag. */
+ /* Initialize state of modifiers. */
+ argpos = 0;
do_assign = 1;
group_flag = 0;
+ is_short = is_long = is_long_double = malloc_string = 0;
+
+ /* Check for a positional parameter specification. */
+ if (isdigit (*f))
+ {
+ argpos = *f++ - '0';
+ while (isdigit (*f))
+ argpos = argpos * 10 + (*f++ - '0');
+ if (*f == '$')
+ ++f;
+ else
+ {
+ /* Oops; that was actually the field width. */
+ width = argpos;
+ argpos = 0;
+ goto got_width;
+ }
+ }
+
+ /* Check for the assignment-suppressant and the number grouping flag. */
while (*f == '*' || *f == '\'')
switch (*f++)
{
@@ -166,11 +199,11 @@ DEFUN(__vfscanf, (s, format, arg),
width *= 10;
width += *f++ - '0';
}
+ got_width:
if (width == 0)
width = -1;
/* Check for type modifiers. */
- is_short = is_long = is_long_double = malloc_string = 0;
while (*f == 'h' || *f == 'l' || *f == 'L' || *f == 'a' || *f == 'q')
switch (*f++)
{
@@ -218,13 +251,13 @@ DEFUN(__vfscanf, (s, format, arg),
case 'n': /* Answer number of assignments done. */
if (do_assign)
- *va_arg(arg, int *) = read_in;
+ *ARG (int *) = read_in;
break;
case 'c': /* Match characters. */
if (do_assign)
{
- str = va_arg (arg, char *);
+ str = ARG (char *);
if (str == NULL)
conv_error ();
}
@@ -256,7 +289,7 @@ DEFUN(__vfscanf, (s, format, arg),
if (malloc_string) \
{ \
/* The string is to be stored in a malloc'd buffer. */ \
- strptr = va_arg (arg, char **); \
+ strptr = ARG (char **); \
if (strptr == NULL) \
conv_error (); \
/* Allocate an initial buffer. */ \
@@ -264,7 +297,7 @@ DEFUN(__vfscanf, (s, format, arg),
*strptr = str = malloc (strsize); \
} \
else \
- str = va_arg (arg, char *); \
+ str = ARG (char *); \
if (str == NULL) \
conv_error (); \
}
@@ -406,16 +439,16 @@ DEFUN(__vfscanf, (s, format, arg),
/* Convert the number. */
*w = '\0';
- if (number_signed)
+ if (is_longlong)
{
- if (is_longlong)
+ if (number_signed)
num.q = __strtoq_internal (work, &w, base, group_flag);
else
num.uq = __strtouq_internal (work, &w, base, group_flag);
}
else
{
- if (is_long_double)
+ if (number_signed)
num.l = __strtol_internal (work, &w, base, group_flag);
else
num.ul = __strtoul_internal (work, &w, base, group_flag);
@@ -428,25 +461,25 @@ DEFUN(__vfscanf, (s, format, arg),
if (! number_signed)
{
if (is_longlong)
- *va_arg (arg, unsigned LONGLONG int *) = num.uq;
+ *ARG (unsigned LONGLONG int *) = num.uq;
else if (is_long)
- *va_arg (arg, unsigned long int *) = num.ul;
+ *ARG (unsigned long int *) = num.ul;
else if (is_short)
- *va_arg (arg, unsigned short int *)
+ *ARG (unsigned short int *)
= (unsigned short int) num.ul;
else
- *va_arg (arg, unsigned int *) = (unsigned int) num.ul;
+ *ARG (unsigned int *) = (unsigned int) num.ul;
}
else
{
if (is_longlong)
- *va_arg (arg, LONGLONG int *) = num.q;
+ *ARG (LONGLONG int *) = num.q;
else if (is_long)
- *va_arg (arg, long int *) = num.l;
+ *ARG (long int *) = num.l;
else if (is_short)
- *va_arg (arg, short int *) = (short int) num.l;
+ *ARG (short int *) = (short int) num.l;
else
- *va_arg (arg, int *) = (int) num.l;
+ *ARG (int *) = (int) num.l;
}
++done;
}
@@ -505,19 +538,19 @@ DEFUN(__vfscanf, (s, format, arg),
{
long double d = __strtold_internal (work, &w, group_flag);
if (do_assign && w != work)
- *va_arg (arg, long double *) = d;
+ *ARG (long double *) = d;
}
else if (is_long)
{
double d = __strtod_internal (work, &w, group_flag);
if (do_assign && w != work)
- *va_arg (arg, double *) = d;
+ *ARG (double *) = d;
}
else
{
float d = __strtof_internal (work, &w, group_flag);
if (do_assign && w != work)
- *va_arg (arg, float *) = d;
+ *ARG (float *) = d;
}
if (w == work)