Lib: Support for 64-bit numbers in bvsnprintf()
Use 'l' for s64/u64 instead of for long/ulong, as that is much more useful. Also make number() correct with regard to signed/unsigned typecasts.
This commit is contained in:
Ondrej Zajicek (work)
parent
cc95b4594a
commit
759b204be3
4 changed files with 50 additions and 35 deletions
65
lib/printf.c
65
lib/printf.c
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@ -34,13 +34,7 @@ static int skip_atoi(const char **s)
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#define SPECIAL 32 /* 0x */
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#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
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#define do_div(n,base) ({ \
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int __res; \
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__res = ((unsigned long) n) % (unsigned) base; \
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n = ((unsigned long) n) / (unsigned) base; \
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__res; })
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static char * number(char * str, long num, int base, int size, int precision,
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static char * number(char * str, u64 num, uint base, int size, int precision,
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int type, int remains)
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{
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char c,sign,tmp[66];
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@ -58,7 +52,7 @@ static char * number(char * str, long num, int base, int size, int precision,
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c = (type & ZEROPAD) ? '0' : ' ';
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sign = 0;
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if (type & SIGN) {
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if (num < 0) {
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if (num > (u64) INT64_MAX) {
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sign = '-';
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num = -num;
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size--;
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@ -79,8 +73,11 @@ static char * number(char * str, long num, int base, int size, int precision,
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i = 0;
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if (num == 0)
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tmp[i++]='0';
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else while (num != 0)
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tmp[i++] = digits[do_div(num,base)];
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else while (num != 0) {
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uint res = num % base;
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num = num / base;
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tmp[i++] = digits[res];
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}
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if (i > precision)
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precision = i;
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size -= precision;
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@ -128,16 +125,17 @@ static char * number(char * str, long num, int base, int size, int precision,
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* value printed as eight :-separated octets), |%t| for time values (btime) with
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* specified subsecond precision, and |%m| resp. |%M| for error messages (uses
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* strerror() to translate @errno code to message text). On the other hand, it
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* doesn't support floating point numbers.
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* doesn't support floating point numbers. The bvsnprintf() supports |%h| and
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* |%l| qualifiers, but |%l| is used for s64/u64 instead of long/ulong.
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*
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* Result: number of characters of the output string or -1 if
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* the buffer space was insufficient.
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*/
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int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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{
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int len;
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unsigned long num;
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int i, base;
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int len, i;
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u64 num;
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uint base;
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u32 x;
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u64 X;
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btime t;
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@ -152,7 +150,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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int field_width; /* width of output field */
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int precision; /* min. # of digits for integers; max
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number of chars for from string */
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int qualifier; /* 'h', 'l', or 'L' for integer fields */
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int qualifier; /* 'h' or 'l' for integer fields */
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for (start=str=buf ; *fmt ; ++fmt, size-=(str-start), start=str) {
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if (*fmt != '%') {
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@ -286,16 +284,15 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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field_width = 2*sizeof(void *);
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flags |= ZEROPAD;
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}
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str = number(str,
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(unsigned long) va_arg(args, void *), 16,
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field_width, precision, flags, size);
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str = number(str, (uintptr_t) va_arg(args, void *), 16,
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field_width, precision, flags, size);
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if (!str)
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return -1;
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continue;
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case 'n':
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if (qualifier == 'l') {
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long * ip = va_arg(args, long *);
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s64 * ip = va_arg(args, s64 *);
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*ip = (str - buf);
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} else {
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int * ip = va_arg(args, int *);
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@ -393,7 +390,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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/* Print seconds */
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flags |= SIGN;
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str = number(str, t1, 10, field_width, 0, flags, size);
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str = number(str, (u64) t1, 10, field_width, 0, flags, size);
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if (!str)
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return -1;
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@ -411,7 +408,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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/* Print sub-seconds */
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*str++ = '.';
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str = number(str, t2, 10, precision, 0, ZEROPAD, size - 1);
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str = number(str, (u64) t2, 10, precision, 0, ZEROPAD, size - 1);
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if (!str)
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return -1;
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}
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@ -446,16 +443,22 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
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--fmt;
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continue;
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}
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if (qualifier == 'l')
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num = va_arg(args, unsigned long);
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else if (qualifier == 'h') {
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num = (unsigned short) va_arg(args, int);
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if (flags & SIGN)
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num = (short) num;
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} else if (flags & SIGN)
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num = va_arg(args, int);
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else
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num = va_arg(args, uint);
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if (flags & SIGN) {
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/* Conversions valid per ISO C99 6.3.1.3 (2) */
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if (qualifier == 'l')
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num = (u64) va_arg(args, s64);
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else if (qualifier == 'h')
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num = (u64) (short) va_arg(args, int);
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else
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num = (u64) va_arg(args, int);
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} else {
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if (qualifier == 'l')
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num = va_arg(args, u64);
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else if (qualifier == 'h')
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num = (unsigned short) va_arg(args, int);
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else
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num = va_arg(args, uint);
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}
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str = number(str, num, base, field_width, precision, flags, size);
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if (!str)
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return -1;
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@ -45,7 +45,7 @@ t_simple(void)
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else
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BSPRINTF(16, "00000fee1a15600d", buf, "%p", (void *) 0xfee1a15600d);
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long ln = 0;
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s64 ln = 0;
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BSPRINTF(10, "TeStStRiNg", buf, "TeStS%lntRiNg", &ln);
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bt_assert_msg(ln == 5, "fmt=\"TeStS%%lntRiNg\", &ln makes ln=%ld, want 5", ln);
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@ -54,7 +54,19 @@ t_simple(void)
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BSPRINTF(2, "+1", buf, "%+d", 1);
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BSPRINTF(2, " 1", buf, "% d", 1);
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BSPRINTF(2, "-1", buf, "%d", -1);
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BSPRINTF(11, "-2147483648", buf, "%d", -2147483648);
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BSPRINTF(11, "-2147483648", buf, "%d", INT32_MIN);
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BSPRINTF(10, "2147483647", buf, "%d", INT32_MAX);
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BSPRINTF(1, "0", buf, "%u", 0x0);
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BSPRINTF(10, "4294967295", buf, "%u", 0xFFFFFFFF);
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BSPRINTF(4, "-100", buf, "%ld", (s64) -100);
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BSPRINTF(3, "100", buf, "%ld", (s64) 100);
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BSPRINTF(20, "-9223372036854775808", buf, "%ld", INT64_MIN);
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BSPRINTF(19, "9223372036854775807", buf, "%ld", INT64_MAX);
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BSPRINTF(3, "0 8", buf, "%lu %lu", U64(0), U64(8));
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BSPRINTF(20, "18446744073709551615", buf, "%lu", UINT64_MAX);
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return 1;
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}
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@ -192,7 +192,7 @@ perf_loop(void *data)
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s64 withdrawtime = timediff(&ts_update, &ts_withdraw);
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if (updatetime NS >= p->threshold_min)
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PLOG("exp=%u times: gen=%lu update=%lu withdraw=%lu",
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PLOG("exp=%u times: gen=%ld update=%ld withdraw=%ld",
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p->exp, gentime, updatetime, withdrawtime);
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if (updatetime NS < p->threshold_max)
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@ -533,7 +533,7 @@ write_pid_file(void)
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/* We don't use PID file for uniqueness, so no need for locking */
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pl = bsnprintf(ps, sizeof(ps), "%ld\n", (long) getpid());
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pl = bsnprintf(ps, sizeof(ps), "%ld\n", (s64) getpid());
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if (pl < 0)
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bug("PID buffer too small");
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