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cb39a7ca6

Denis Vlasenko
Denis Vlasenko
2009-01-04
FAILED Duration: 30s

Subject

printf: make integer format strings print long long-sized values.

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

coreutils/printf.c +65 -53
coreutils/printf.c+65 -53
@@ -75,13 +75,13 @@ static int multiconvert(const char *arg, void *result, converter convert)
return 0;
}
-static void FAST_FUNC conv_strtoul(const char *arg, void *result)
+static void FAST_FUNC conv_strtoull(const char *arg, void *result)
{
- *(unsigned long*)result = bb_strtoul(arg, NULL, 0);
+ *(unsigned long long*)result = bb_strtoull(arg, NULL, 0);
}
-static void FAST_FUNC conv_strtol(const char *arg, void *result)
+static void FAST_FUNC conv_strtoll(const char *arg, void *result)
{
- *(long*)result = bb_strtol(arg, NULL, 0);
+ *(long long*)result = bb_strtoll(arg, NULL, 0);
}
static void FAST_FUNC conv_strtod(const char *arg, void *result)
{
@@ -96,17 +96,17 @@ static void FAST_FUNC conv_strtod(const char *arg, void *result)
}
/* Callers should check errno to detect errors */
-static unsigned long my_xstrtoul(const char *arg)
+static unsigned long long my_xstrtoull(const char *arg)
{
- unsigned long result;
- if (multiconvert(arg, &result, conv_strtoul))
+ unsigned long long result;
+ if (multiconvert(arg, &result, conv_strtoull))
result = 0;
return result;
}
-static long my_xstrtol(const char *arg)
+static long long my_xstrtoll(const char *arg)
{
- long result;
- if (multiconvert(arg, &result, conv_strtol))
+ long long result;
+ if (multiconvert(arg, &result, conv_strtoll))
result = 0;
return result;
}
@@ -134,7 +134,7 @@ static void print_direc(char *format, unsigned fmt_length,
int field_width, int precision,
const char *argument)
{
- long lv;
+ long long llv;
double dv;
char saved;
char *have_prec, *have_width;
@@ -153,42 +153,44 @@ static void print_direc(char *format, unsigned fmt_length,
break;
case 'd':
case 'i':
- lv = my_xstrtol(argument);
+ llv = my_xstrtoll(argument);
print_long:
/* if (errno) return; - see comment at the top */
if (!have_width) {
if (!have_prec)
- printf(format, lv);
+ printf(format, llv);
else
- printf(format, precision, lv);
+ printf(format, precision, llv);
} else {
if (!have_prec)
- printf(format, field_width, lv);
+ printf(format, field_width, llv);
else
- printf(format, field_width, precision, lv);
+ printf(format, field_width, precision, llv);
}
break;
case 'o':
case 'u':
case 'x':
case 'X':
- lv = my_xstrtoul(argument);
+ llv = my_xstrtoull(argument);
/* cheat: unsigned long and long have same width, so... */
goto print_long;
case 's':
- /* Are char* and long the same? (true for most arches) */
- if (sizeof(argument) == sizeof(lv)) {
- lv = (long)(ptrdiff_t)argument;
+ /* Are char* and long long the same? */
+ if (sizeof(argument) == sizeof(llv)) {
+ llv = (long long)(ptrdiff_t)argument;
goto print_long;
- } else { /* Hope compiler will optimize it out */
+ } else {
+ /* Hope compiler will optimize it out by moving call
+ * instruction after the ifs... */
if (!have_width) {
if (!have_prec)
- printf(format, argument);
+ printf(format, argument, /*unused:*/ argument, argument);
else
- printf(format, precision, argument);
+ printf(format, precision, argument, /*unused:*/ argument);
} else {
if (!have_prec)
- printf(format, field_width, argument);
+ printf(format, field_width, argument, /*unused:*/ argument);
else
printf(format, field_width, precision, argument);
}
@@ -286,38 +288,48 @@ static char **print_formatted(char *f, char **argv)
}
}
}
- /* Remove size modifiers - "%Ld" would try to printf
- * long long, we pass long, and it spews garbage */
- if ((*f | 0x20) == 'l' || *f == 'h' || *f == 'z') {
+
+ /* Remove "lLhz" size modifiers, repeatedly.
+ * bash does not like "%lld", but coreutils
+ * would happily take even "%Llllhhzhhzd"!
+ * We will be permissive like coreutils */
+ while ((*f | 0x20) == 'l' || *f == 'h' || *f == 'z') {
overlapping_strcpy(f, f + 1);
}
-//FIXME: actually, the same happens with bare "%d":
-//it printfs an int, but we pass long!
-//What saves us is that on most arches stack slot
-//is pointer-sized -> long-sized -> ints are promoted to longs
-// for variadic functions -> printf("%d", int_v) is in reality
-// indistinqushable from printf("%d", long_v) ->
-// since printf("%d", int_v) works, printf("%d", long_v) has to work.
-//But "clean" solution would be to add "l" to d,i,o,x,X.
-//Probably makes sense to go all the way to "ll" then.
-//Coreutils support long long-sized arguments.
-
- /* needed - try "printf %" without it */
- if (!strchr("diouxXfeEgGcs", *f)) {
- bb_error_msg("%s: invalid format", direc_start);
- /* causes main() to exit with error */
- return saved_argv - 1;
- }
- ++direc_length;
- if (*argv) {
- print_direc(direc_start, direc_length, field_width,
- precision, *argv);
- ++argv;
- } else {
- print_direc(direc_start, direc_length, field_width,
- precision, "");
+ /* Add "ll" if integer modifier, then print */
+ {
+ static const char format_chars[] ALIGN1 = "diouxXfeEgGcs";
+ char *p = strchr(format_chars, *f);
+ /* needed - try "printf %" without it */
+ if (p == NULL) {
+ bb_error_msg("%s: invalid format", direc_start);
+ /* causes main() to exit with error */
+ return saved_argv - 1;
+ }
+ ++direc_length;
+ if (p - format_chars <= 5) {
+ /* it is one of "diouxX" */
+ p = xmalloc(direc_length + 3);
+ memcpy(p, direc_start, direc_length);
+ p[direc_length + 1] = p[direc_length - 1];
+ p[direc_length - 1] = 'l';
+ p[direc_length] = 'l';
+ //bb_error_msg("<%s>", p);
+ direc_length += 2;
+ direc_start = p;
+ } else {
+ p = NULL;
+ }
+ if (*argv) {
+ print_direc(direc_start, direc_length, field_width,
+ precision, *argv);
+ ++argv;
+ } else {
+ print_direc(direc_start, direc_length, field_width,
+ precision, "");
+ }
+ free(p);
}
- /* if (errno) return saved_argv - 1; */
break;
case '\\':
if (*++f == 'c') {