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authorManuel Novoa III <mjn3@codepoet.org>2003-09-08 20:44:33 +0000
committerManuel Novoa III <mjn3@codepoet.org>2003-09-08 20:44:33 +0000
commit18638f737cc82b08b0e741ac36748520aa65ba42 (patch)
tree2bc398f301aec2a5e28f17f2a921104bcb00fbdc /libc/stdio
parentca773a850f79d6f346600439b6f91da58f7055a6 (diff)
Signifcantly speed out integer to string conversion for printf.
Printf still needs some performance work done though. Also some bufferless stdio cleanups.
Diffstat (limited to 'libc/stdio')
-rw-r--r--libc/stdio/stdio.c87
1 files changed, 38 insertions, 49 deletions
diff --git a/libc/stdio/stdio.c b/libc/stdio/stdio.c
index 40ac693a4..3a2f2d073 100644
--- a/libc/stdio/stdio.c
+++ b/libc/stdio/stdio.c
@@ -1050,11 +1050,11 @@ size_t __fpending(register FILE * __restrict stream)
void _flushlbf(void)
{
-#ifdef __STDIO_BUFFERS
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
fflush((FILE *) &_stdio_openlist); /* Uses an implementation hack!!! */
-#else /* __STDIO_BUFFERS */
+#else /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
/* Nothing to do. */
-#endif /* __STDIO_BUFFERS */
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
}
#endif
@@ -1925,6 +1925,7 @@ void _stdio_term(void)
* the stream may be in an unstable state... what do we do?
* perhaps set error flag before and clear when done if successful? */
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
#ifdef __STDIO_THREADSAFE
/* First, forceably unlock the open file list and all files.
* Note: Set locking mode to "by caller" to save some overhead later. */
@@ -1934,6 +1935,7 @@ void _stdio_term(void)
__stdio_init_mutex(&ptr->lock);
}
#endif /* __STDIO_THREADSAFE */
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
#ifdef __STDIO_BUFFERS
/* TODO -- set an alarm and flush each file "by hand"? to avoid blocking? */
@@ -2190,9 +2192,9 @@ int fflush(register FILE *stream)
int retval;
if ((stream != NULL)
-#ifdef __STDIO_BUFFERS
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
&& (stream != (FILE *) &_stdio_openlist)
-#endif /* __STDIO_BUFFERS */
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
) {
__STDIO_THREADLOCK(stream);
retval = fflush_unlocked(stream);
@@ -2264,7 +2266,11 @@ int fflush_unlocked(register FILE *stream)
#else /* __STDIO_BUFFERS --------------------------------------- */
#ifndef NDEBUG
- if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
+ if ((stream != NULL)
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
+ && (stream != (FILE *) &_stdio_openlist)
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+ ) {
__stdio_validate_FILE(stream); /* debugging only */
}
#endif
@@ -3444,7 +3450,6 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
#endif
#ifndef __LOCALE_C_ONLY
int grouping, outdigit;
- size_t gslen; /* This does not need to be initialized. */
const char *g; /* This does not need to be initialized. */
#endif /* __LOCALE_C_ONLY */
@@ -3467,7 +3472,6 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
if (alphacase == __UIM_GROUP) {
assert(base == 10);
if (*(g = __UCLIBC_CURLOCALE_DATA.grouping)) {
- gslen = strlen(__UCLIBC_CURLOCALE_DATA.thousands_sep);
grouping = *g;
}
}
@@ -3479,18 +3483,9 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
do {
#ifndef __LOCALE_C_ONLY
if (!grouping) { /* Finished a group. */
-#ifdef __UCLIBC_MJN3_ONLY__
-#warning TODO: Decide about memcpy in _uintmaxtostr.
-#endif /* __UCLIBC_MJN3_ONLY__ */
-#if 0
- bufend -= gslen;
- memcpy(bufend, __UCLIBC_CURLOCALE_DATA.thousands_sep, gslen);
-#else
- grouping = gslen;
- do {
- *--bufend = __UCLIBC_CURLOCALE_DATA.thousands_sep[--grouping];
- } while (grouping);
-#endif
+ bufend -= __UCLIBC_CURLOCALE_DATA.thousands_sep_len;
+ __builtin_memcpy(bufend, __UCLIBC_CURLOCALE_DATA.thousands_sep,
+ __UCLIBC_CURLOCALE_DATA.thousands_sep_len);
if (g[1] != 0) { /* g[1] == 0 means repeat last grouping. */
/* Note: g[1] == -1 means no further grouping. But since
* we'll never wrap around, we can set grouping to -1 without
@@ -3505,12 +3500,11 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
uval /= base;
#ifndef __LOCALE_C_ONLY
- if (outdigit) {
- outdigit = __UCLIBC_CURLOCALE_DATA.outdigit_length[digit];
- do {
- *--bufend = (&__UCLIBC_CURLOCALE_DATA.outdigit0_mb)[digit][--outdigit];
- } while (outdigit);
- outdigit = 1;
+ if (unlikely(outdigit)) {
+ bufend -= __UCLIBC_CURLOCALE_DATA.outdigit_length[digit];
+ __builtin_memcpy(bufend,
+ (&__UCLIBC_CURLOCALE_DATA.outdigit0_mb)[digit],
+ __UCLIBC_CURLOCALE_DATA.outdigit_length[digit]);
} else
#endif
{
@@ -3532,18 +3526,9 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
do {
#ifndef __LOCALE_C_ONLY
if (!grouping) { /* Finished a group. */
-#ifdef __UCLIBC_MJN3_ONLY__
-#warning TODO: Decide about memcpy in _uintmaxtostr
-#endif /* __UCLIBC_MJN3_ONLY__ */
-#if 0
- bufend -= gslen;
- memcpy(bufend, __UCLIBC_CURLOCALE_DATA.thousands_sep, gslen);
-#else
- grouping = gslen;
- do {
- *--bufend = __UCLIBC_CURLOCALE_DATA.thousands_sep[--grouping];
- } while (grouping);
-#endif
+ bufend -= __UCLIBC_CURLOCALE_DATA.thousands_sep_len;
+ __builtin_memcpy(bufend, __UCLIBC_CURLOCALE_DATA.thousands_sep,
+ __UCLIBC_CURLOCALE_DATA.thousands_sep_len);
if (g[1] != 0) { /* g[1] == 0 means repeat last grouping. */
/* Note: g[1] == -1 means no further grouping. But since
* we'll never wrap around, we can set grouping to -1 without
@@ -3555,19 +3540,23 @@ char *_uintmaxtostr(register char * __restrict bufend, uintmax_t uval,
--grouping;
#endif /* __LOCALE_C_ONLY */
- rh = high % base;
- high /= base;
- digit = (low % base) + (L * rh);
- low = (low / base) + (H * rh) + (digit / base);
- digit %= base;
+ if (unlikely(high)) {
+ rh = high % base;
+ high /= base;
+ digit = (low % base) + (L * rh);
+ low = (low / base) + (H * rh) + (digit / base);
+ digit %= base;
+ } else {
+ digit = low % base;
+ low /= base;
+ }
#ifndef __LOCALE_C_ONLY
- if (outdigit) {
- outdigit = __UCLIBC_CURLOCALE_DATA.outdigit_length[digit];
- do {
- *--bufend = (&__UCLIBC_CURLOCALE_DATA.outdigit0_mb)[digit][--outdigit];
- } while (outdigit);
- outdigit = 1;
+ if (unlikely(outdigit)) {
+ bufend -= __UCLIBC_CURLOCALE_DATA.outdigit_length[digit];
+ __builtin_memcpy(bufend,
+ (&__UCLIBC_CURLOCALE_DATA.outdigit0_mb)[digit],
+ __UCLIBC_CURLOCALE_DATA.outdigit_length[digit]);
} else
#endif
{