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-rw-r--r--libc/stdio/_fpmaxtostr.c738
1 files changed, 738 insertions, 0 deletions
diff --git a/libc/stdio/_fpmaxtostr.c b/libc/stdio/_fpmaxtostr.c
new file mode 100644
index 000000000..7fd67ffb4
--- /dev/null
+++ b/libc/stdio/_fpmaxtostr.c
@@ -0,0 +1,738 @@
+/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+#include <printf.h>
+#include <float.h>
+#include <locale.h>
+#include <bits/uClibc_fpmax.h>
+
+typedef void (__fp_outfunc_t)(FILE *fp, intptr_t type, intptr_t len,
+ intptr_t buf);
+
+
+/* Copyright (C) 2000, 2001, 2003 Manuel Novoa III
+ *
+ * Function:
+ *
+ * size_t _fpmaxtostr(FILE * fp, __fpmax_t x, struct printf_info *info,
+ * __fp_outfunc_t fp_outfunc);
+ *
+ * This is derived from the old _dtostr, whic I wrote for uClibc to provide
+ * floating point support for the printf functions. It handles +/- infinity,
+ * nan, and signed 0 assuming you have ieee arithmetic. It also now handles
+ * digit grouping (for the uClibc supported locales) and hexadecimal float
+ * notation. Finally, via the fp_outfunc parameter, it now supports wide
+ * output.
+ *
+ * Notes:
+ *
+ * At most DECIMAL_DIG significant digits are kept. Any trailing digits
+ * are treated as 0 as they are really just the results of rounding noise
+ * anyway. If you want to do better, use an arbitary precision arithmetic
+ * package. ;-)
+ *
+ * It should also be fairly portable, as no assumptions are made about the
+ * bit-layout of doubles. Of course, that does make it less efficient than
+ * it could be.
+ *
+ */
+
+/*****************************************************************************/
+/* Don't change anything that follows unless you know what you're doing. */
+/*****************************************************************************/
+/* Fairly portable nan check. Bitwise for i386 generated larger code.
+ * If you have a better version, comment this out.
+ */
+#define isnan(x) ((x) != (x))
+
+/* Without seminumerical functions to examine the sign bit, this is
+ * about the best we can do to test for '-0'.
+ */
+#define zeroisnegative(x) ((1./(x)) < 0)
+
+/*****************************************************************************/
+/* Don't change anything that follows peroid!!! ;-) */
+/*****************************************************************************/
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+#if FLT_RADIX != 2
+#error FLT_RADIX != 2 is not currently supported
+#endif
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+#define NUM_HEX_DIGITS ((FPMAX_MANT_DIG + 3)/ 4)
+
+/* WARNING: Adjust _fp_out_wide() below if this changes! */
+/* With 32 bit ints, we can get 9 decimal digits per block. */
+#define DIGITS_PER_BLOCK 9
+#define HEX_DIGITS_PER_BLOCK 8
+
+/* Maximum number of subcases to output double is...
+ * 0 - sign
+ * 1 - padding and initial digit
+ * 2 - digits left of the radix
+ * 3 - 0s left of the radix or radix
+ * 4 - radix or digits right of the radix
+ * 5 - 0s right of the radix
+ * 6 - exponent
+ * 7 - trailing space padding
+ * although not all cases may occur.
+ */
+#define MAX_CALLS 8
+
+/*****************************************************************************/
+
+#define NUM_DIGIT_BLOCKS ((DECIMAL_DIG+DIGITS_PER_BLOCK-1)/DIGITS_PER_BLOCK)
+#define NUM_HEX_DIGIT_BLOCKS \
+ ((NUM_HEX_DIGITS+HEX_DIGITS_PER_BLOCK-1)/HEX_DIGITS_PER_BLOCK)
+
+/* WARNING: Adjust _fp_out_wide() below if this changes! */
+
+/* extra space for '-', '.', 'e+###', and nul */
+#define BUF_SIZE ( 3 + NUM_DIGIT_BLOCKS * DIGITS_PER_BLOCK )
+
+/*****************************************************************************/
+
+static const char fmt[] = "inf\0INF\0nan\0NAN\0.\0,";
+
+#define INF_OFFSET 0 /* must be 1st */
+#define NAN_OFFSET 8 /* must be 2nd.. see hex sign handling */
+#define DECPT_OFFSET 16
+#define THOUSEP_OFFSET 18
+
+#define EMPTY_STRING_OFFSET 3
+
+/*****************************************************************************/
+#if FPMAX_MAX_10_EXP < -FPMAX_MIN_10_EXP
+#error scaling code can not handle FPMAX_MAX_10_EXP < -FPMAX_MIN_10_EXP
+#endif
+
+static const __fpmax_t exp10_table[] =
+{
+ 1e1L, 1e2L, 1e4L, 1e8L, 1e16L, 1e32L, /* floats */
+#if FPMAX_MAX_10_EXP < 32
+#error unsupported FPMAX_MAX_10_EXP (< 32). ANSI/ISO C requires >= 37.
+#endif
+#if FPMAX_MAX_10_EXP >= 64
+ 1e64L,
+#endif
+#if FPMAX_MAX_10_EXP >= 128
+ 1e128L,
+#endif
+#if FPMAX_MAX_10_EXP >= 256
+ 1e256L,
+#endif
+#if FPMAX_MAX_10_EXP >= 512
+ 1e512L,
+#endif
+#if FPMAX_MAX_10_EXP >= 1024
+ 1e1024L,
+#endif
+#if FPMAX_MAX_10_EXP >= 2048
+ 1e2048L,
+#endif
+#if FPMAX_MAX_10_EXP >= 4096
+ 1e4096L
+#endif
+#if FPMAX_MAX_10_EXP >= 8192
+#error unsupported FPMAX_MAX_10_EXP. please increase table
+#endif
+};
+
+#define EXP10_TABLE_SIZE (sizeof(exp10_table)/sizeof(exp10_table[0]))
+#define EXP10_TABLE_MAX (1U<<(EXP10_TABLE_SIZE-1))
+
+/*****************************************************************************/
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+
+#if FLT_RADIX != 2
+#error FLT_RADIX != 2 is not currently supported
+#endif
+
+#if FPMAX_MAX_EXP < -FPMAX_MIN_EXP
+#error scaling code can not handle FPMAX_MAX_EXP < -FPMAX_MIN_EXP
+#endif
+
+static const __fpmax_t exp16_table[] = {
+ 0x1.0p4L, 0x1.0p8L, 0x1.0p16L, 0x1.0p32L, 0x1.0p64L,
+#if FPMAX_MAX_EXP >= 128
+ 0x1.0p128L,
+#endif
+#if FPMAX_MAX_EXP >= 256
+ 0x1.0p256L,
+#endif
+#if FPMAX_MAX_EXP >= 512
+ 0x1.0p512L,
+#endif
+#if FPMAX_MAX_EXP >= 1024
+ 0x1.0p1024L,
+#endif
+#if FPMAX_MAX_EXP >= 2048
+ 0x1.0p2048L,
+#endif
+#if FPMAX_MAX_EXP >= 4096
+ 0x1.0p4096L,
+#endif
+#if FPMAX_MAX_EXP >= 8192
+ 0x1.0p8192L,
+#endif
+#if FPMAX_MAX_EXP >= 16384
+ 0x1.0p16384L
+#endif
+#if FPMAX_MAX_EXP >= 32768
+#error unsupported FPMAX_MAX_EXP. please increase table
+#endif
+};
+
+#define EXP16_TABLE_SIZE (sizeof(exp16_table)/sizeof(exp16_table[0]))
+#define EXP16_TABLE_MAX (1U<<(EXP16_TABLE_SIZE-1))
+
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+/*****************************************************************************/
+
+#define FPO_ZERO_PAD (0x80 | '0')
+#define FPO_STR_WIDTH (0x80 | ' ');
+#define FPO_STR_PREC 'p'
+
+size_t _fpmaxtostr(FILE * fp, __fpmax_t x, struct printf_info *info,
+ __fp_outfunc_t fp_outfunc)
+{
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ __fpmax_t lower_bnd;
+ __fpmax_t upper_bnd = 1e9;
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+ uint_fast32_t digit_block;
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ uint_fast32_t base = 10;
+ const __fpmax_t *power_table;
+ int dpb = DIGITS_PER_BLOCK;
+ int ndb = NUM_DIGIT_BLOCKS;
+ int nd = DECIMAL_DIG;
+ int sufficient_precision = 0;
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+#ifdef __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__
+ int num_groups = 0;
+ int initial_group; /* This does not need to be initialized. */
+ int tslen; /* This does not need to be initialized. */
+ int nblk2; /* This does not need to be initialized. */
+ const char *ts; /* This does not need to be initialized. */
+#endif /* __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__ */
+ int i, j;
+ int round, o_exp;
+ int exp, exp_neg;
+ int width, preci;
+ int cnt;
+ char *s;
+ char *e;
+ intptr_t pc_fwi[3*MAX_CALLS];
+ intptr_t *ppc;
+ intptr_t *ppc_last;
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning TODO: The size of exp_buf[] should really be determined by the float constants.
+#endif /* __UCLIBC_MJN3_ONLY__ */
+ char exp_buf[16];
+ char buf[BUF_SIZE];
+ char sign_str[6]; /* Last 2 are for 1st digit + nul. */
+ char o_mode;
+ char mode;
+
+
+ width = info->width;
+ preci = info->prec;
+ mode = info->spec;
+
+ *exp_buf = 'e';
+ if ((mode|0x20) == 'a') {
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ *exp_buf = 'p';
+ if (preci < 0) {
+ preci = NUM_HEX_DIGITS;
+ sufficient_precision = 1;
+ }
+#else
+ mode += ('g' - 'a');
+#endif
+ }
+
+ if (preci < 0) {
+ preci = 6;
+ }
+
+ *sign_str = '\0';
+ if (PRINT_INFO_FLAG_VAL(info,showsign)) {
+ *sign_str = '+';
+ } else if (PRINT_INFO_FLAG_VAL(info,space)) {
+ *sign_str = ' ';
+ }
+
+ *(sign_str+1) = 0;
+ pc_fwi[5] = INF_OFFSET;
+ if (isnan(x)) { /* First, check for nan. */
+ pc_fwi[5] = NAN_OFFSET;
+ goto INF_NAN;
+ }
+
+ if (x == 0) { /* Handle 0 now to avoid false positive. */
+#if 1
+ if (zeroisnegative(x)) { /* Handle 'signed' zero. */
+ *sign_str = '-';
+ }
+#endif
+ exp = -1;
+ goto GENERATE_DIGITS;
+ }
+
+ if (x < 0) { /* Convert negatives to positives. */
+ *sign_str = '-';
+ x = -x;
+ }
+
+ if (__FPMAX_ZERO_OR_INF_CHECK(x)) { /* Inf since zero handled above. */
+ INF_NAN:
+ info->pad = ' ';
+ ppc = pc_fwi + 6;
+ pc_fwi[3] = FPO_STR_PREC;
+ pc_fwi[4] = 3;
+ if (mode < 'a') {
+ pc_fwi[5] += 4;
+ }
+ pc_fwi[5] = (intptr_t)(fmt + pc_fwi[5]);
+ goto EXIT_SPECIAL;
+ }
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning TODO: Clean up defines when hexadecimal float notation is unsupported.
+#endif /* __UCLIBC_MJN3_ONLY__ */
+
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+
+ if ((mode|0x20) == 'a') {
+ lower_bnd = 0x1.0p31L;
+ upper_bnd = 0x1.0p32L;
+ power_table = exp16_table;
+ exp = HEX_DIGITS_PER_BLOCK - 1;
+ i = EXP16_TABLE_SIZE;
+ j = EXP16_TABLE_MAX;
+ dpb = HEX_DIGITS_PER_BLOCK;
+ ndb = NUM_HEX_DIGIT_BLOCKS;
+ nd = NUM_HEX_DIGITS;
+ base = 16;
+ } else {
+ lower_bnd = 1e8;
+/* upper_bnd = 1e9; */
+ power_table = exp10_table;
+ exp = DIGITS_PER_BLOCK - 1;
+ i = EXP10_TABLE_SIZE;
+ j = EXP10_TABLE_MAX;
+/* dpb = DIGITS_PER_BLOCK; */
+/* ndb = NUM_DIGIT_BLOCKS; */
+/* base = 10; */
+ }
+
+
+
+#else /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+#define lower_bnd 1e8
+#define upper_bnd 1e9
+#define power_table exp10_table
+#define dpb DIGITS_PER_BLOCK
+#define base 10
+#define ndb NUM_DIGIT_BLOCKS
+#define nd DECIMAL_DIG
+
+ exp = DIGITS_PER_BLOCK - 1;
+ i = EXP10_TABLE_SIZE;
+ j = EXP10_TABLE_MAX;
+
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+ exp_neg = 0;
+ if (x < lower_bnd) { /* Do we need to scale up or down? */
+ exp_neg = 1;
+ }
+
+ do {
+ --i;
+ if (exp_neg) {
+ if (x * power_table[i] < upper_bnd) {
+ x *= power_table[i];
+ exp -= j;
+ }
+ } else {
+ if (x / power_table[i] >= lower_bnd) {
+ x /= power_table[i];
+ exp += j;
+ }
+ }
+ j >>= 1;
+ } while (i);
+ if (x >= upper_bnd) { /* Handle bad rounding case. */
+ x /= power_table[0];
+ ++exp;
+ }
+ assert(x < upper_bnd);
+
+ GENERATE_DIGITS:
+ s = buf + 2; /* Leave space for '\0' and '0'. */
+ i = 0;
+ do {
+ digit_block = (uint_fast32_t) x;
+ assert(digit_block < upper_bnd);
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning CONSIDER: Can rounding be a problem?
+#endif /* __UCLIBC_MJN3_ONLY__ */
+ x = (x - digit_block) * upper_bnd;
+ s += dpb;
+ j = 0;
+ do {
+ s[- ++j] = '0' + (digit_block % base);
+ digit_block /= base;
+ } while (j < dpb);
+ } while (++i < ndb);
+
+ /*************************************************************************/
+
+ if (mode < 'a') {
+ *exp_buf -= ('a' - 'A'); /* e->E and p->P */
+ mode += ('a' - 'A');
+ }
+
+ o_mode = mode;
+ if ((mode == 'g') && (preci > 0)){
+ --preci;
+ }
+ round = preci;
+
+ if (mode == 'f') {
+ round += exp;
+ if (round < -1) {
+ memset(buf, '0', DECIMAL_DIG); /* OK, since 'f' -> decimal case. */
+ exp = -1;
+ round = -1;
+ }
+ }
+
+ s = buf;
+ *s++ = 0; /* Terminator for rounding and 0-triming. */
+ *s = '0'; /* Space to round. */
+
+ i = 0;
+ e = s + nd + 1;
+ if (round < nd) {
+ e = s + round + 2;
+ if (*e >= '0' + (base/2)) { /* NOTE: We always round away from 0! */
+ i = 1;
+ }
+ }
+
+ do { /* Handle rounding and trim trailing 0s. */
+ *--e += i; /* Add the carry. */
+ } while ((*e == '0') || (*e > '0' - 1 + base));
+
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ if ((mode|0x20) == 'a') {
+ char *q;
+
+ for (q = e ; *q ; --q) {
+ if (*q > '9') {
+ *q += (*exp_buf - ('p' - 'a') - '9' - 1);
+ }
+ }
+
+ if (e > s) {
+ exp *= 4; /* Change from base 16 to base 2. */
+ }
+ }
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+ o_exp = exp;
+ if (e <= s) { /* We carried into an extra digit. */
+ ++o_exp;
+ e = s; /* Needed if all 0s. */
+ } else {
+ ++s;
+ }
+ *++e = 0; /* Terminating nul char. */
+
+ if ((mode == 'g') && ((o_exp >= -4) && (o_exp <= round))) {
+ mode = 'f';
+ preci = round - o_exp;
+ }
+
+ exp = o_exp;
+ if (mode != 'f') {
+ o_exp = 0;
+ }
+
+ if (o_exp < 0) { /* Exponent is < 0, so */
+ *--s = '0'; /* fake the first 0 digit. */
+ }
+
+ pc_fwi[3] = FPO_ZERO_PAD;
+ pc_fwi[4] = 1;
+ pc_fwi[5] = (intptr_t)(sign_str + 4);
+ sign_str[4] = *s++;
+ sign_str[5] = 0;
+ ppc = pc_fwi + 6;
+
+ i = e - s; /* Total digits is 'i'. */
+ if (o_exp >= 0) {
+#ifdef __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__
+
+ const char *p;
+
+ if (PRINT_INFO_FLAG_VAL(info,group)
+ && *(p = __UCLIBC_CURLOCALE_DATA.grouping)
+ ) {
+ int nblk1;
+
+ nblk2 = nblk1 = *p;
+ if (*++p) {
+ nblk2 = *p;
+ assert(!*++p);
+ }
+
+ if (o_exp >= nblk1) {
+ num_groups = (o_exp - nblk1) / nblk2 + 1;
+ initial_group = (o_exp - nblk1) % nblk2;
+
+#ifdef __UCLIBC_HAS_WCHAR__
+ if (PRINT_INFO_FLAG_VAL(info,wide)) {
+ /* _fp_out_wide() will fix this up. */
+ ts = fmt + THOUSEP_OFFSET;
+ tslen = 1;
+ } else {
+#endif /* __UCLIBC_HAS_WCHAR__ */
+ ts = __UCLIBC_CURLOCALE_DATA.thousands_sep;
+ tslen = __UCLIBC_CURLOCALE_DATA.thousands_sep_len;
+#ifdef __UCLIBC_HAS_WCHAR__
+ }
+#endif /* __UCLIBC_HAS_WCHAR__ */
+
+ width -= num_groups * tslen;
+ }
+ }
+
+
+#endif /* __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__ */
+ ppc[0] = FPO_STR_PREC;
+ ppc[2] = (intptr_t)(s);
+ if (o_exp >= i) { /* all digit(s) left of decimal */
+ ppc[1] = i;
+ ppc += 3;
+ o_exp -= i;
+ i = 0;
+ if (o_exp>0) { /* have 0s left of decimal */
+ ppc[0] = FPO_ZERO_PAD;
+ ppc[1] = o_exp;
+ ppc[2] = (intptr_t)(fmt + EMPTY_STRING_OFFSET);
+ ppc += 3;
+ }
+ } else if (o_exp > 0) { /* decimal between digits */
+ ppc[1] = o_exp;
+ ppc += 3;
+ s += o_exp;
+ i -= o_exp;
+ }
+ o_exp = -1;
+ }
+
+ if (PRINT_INFO_FLAG_VAL(info,alt)
+ || (i)
+ || ((o_mode != 'g')
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ && (o_mode != 'a')
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+ && (preci > 0))
+ ) {
+ ppc[0] = FPO_STR_PREC;
+#ifdef __LOCALE_C_ONLY
+ ppc[1] = 1;
+ ppc[2] = (intptr_t)(fmt + DECPT_OFFSET);
+#else /* __LOCALE_C_ONLY */
+#ifdef __UCLIBC_HAS_WCHAR__
+ if (PRINT_INFO_FLAG_VAL(info,wide)) {
+ /* _fp_out_wide() will fix this up. */
+ ppc[1] = 1;
+ ppc[2] = (intptr_t)(fmt + DECPT_OFFSET);
+ } else {
+#endif /* __UCLIBC_HAS_WCHAR__ */
+ ppc[1] = __UCLIBC_CURLOCALE_DATA.decimal_point_len;
+ ppc[2] = (intptr_t)(__UCLIBC_CURLOCALE_DATA.decimal_point);
+#ifdef __UCLIBC_HAS_WCHAR__
+ }
+#endif /* __UCLIBC_HAS_WCHAR__ */
+#endif /* __LOCALE_C_ONLY */
+ ppc += 3;
+ }
+
+ if (++o_exp < 0) { /* Have 0s right of decimal. */
+ ppc[0] = FPO_ZERO_PAD;
+ ppc[1] = -o_exp;
+ ppc[2] = (intptr_t)(fmt + EMPTY_STRING_OFFSET);
+ ppc += 3;
+ }
+ if (i) { /* Have digit(s) right of decimal. */
+ ppc[0] = FPO_STR_PREC;
+ ppc[1] = i;
+ ppc[2] = (intptr_t)(s);
+ ppc += 3;
+ }
+
+ if (((o_mode != 'g') || PRINT_INFO_FLAG_VAL(info,alt))
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ && !sufficient_precision
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+ ) {
+ i -= o_exp;
+ if (i < preci) { /* Have 0s right of digits. */
+ i = preci - i;
+ ppc[0] = FPO_ZERO_PAD;
+ ppc[1] = i;
+ ppc[2] = (intptr_t)(fmt + EMPTY_STRING_OFFSET);
+ ppc += 3;
+ }
+ }
+
+ /* Build exponent string. */
+ if (mode != 'f') {
+ char *p = exp_buf + sizeof(exp_buf);
+ char exp_char = *exp_buf;
+ char exp_sign = '+';
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ int min_exp_dig_plus_2 = ((o_mode != 'a') ? (2+2) : (2+1));
+#else /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+#define min_exp_dig_plus_2 (2+2)
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+ if (exp < 0) {
+ exp_sign = '-';
+ exp = -exp;
+ }
+
+ *--p = 0; /* nul-terminate */
+ j = 2; /* Count exp_char and exp_sign. */
+ do {
+ *--p = '0' + (exp % 10);
+ exp /= 10;
+ } while ((++j < min_exp_dig_plus_2) || exp); /* char+sign+mindigits */
+ *--p = exp_sign;
+ *--p = exp_char;
+
+ ppc[0] = FPO_STR_PREC;
+ ppc[1] = j;
+ ppc[2] = (intptr_t)(p);
+ ppc += 3;
+ }
+
+ EXIT_SPECIAL:
+ ppc_last = ppc;
+ ppc = pc_fwi + 4; /* Need width fields starting with second. */
+ do {
+ width -= *ppc;
+ ppc += 3;
+ } while (ppc < ppc_last);
+
+ ppc = pc_fwi;
+ ppc[0] = FPO_STR_WIDTH;
+ ppc[1] = i = ((*sign_str) != 0);
+ ppc[2] = (intptr_t) sign_str;
+
+#ifdef __UCLIBC_HAS_HEXADECIMAL_FLOATS__
+ if (((mode|0x20) == 'a') && (pc_fwi[3] >= 16)) { /* Hex sign handling. */
+ /* Hex and not inf or nan, so prefix with 0x. */
+ char *h = sign_str + i;
+ *h = '0';
+ *++h = 'x' - 'p' + *exp_buf;
+ *++h = 0;
+ ppc[1] = (i += 2);
+ }
+#endif /* __UCLIBC_HAS_HEXADECIMAL_FLOATS__ */
+
+ if ((width -= i) > 0) {
+ if (PRINT_INFO_FLAG_VAL(info,left)) { /* Left-justified. */
+ ppc_last[0] = FPO_STR_WIDTH;
+ ppc_last[1] = width;
+ ppc_last[2] = (intptr_t)(fmt + EMPTY_STRING_OFFSET);
+ ppc_last += 3;
+ } else if (info->pad == '0') { /* 0 padding */
+ ppc[4] += width; /* Pad second field. */
+ } else {
+ ppc[1] += width; /* Pad first (sign) field. */
+ }
+ }
+
+ cnt = 0;
+
+ do {
+#ifdef __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__
+
+ if ((ppc == pc_fwi + 6) && num_groups) {
+ const char *gp = (const char *) ppc[2];
+ int len = ppc[1];
+ int blk = initial_group;
+
+ cnt += num_groups * tslen; /* Adjust count now for sep chars. */
+
+/* printf("\n"); */
+ do {
+ if (!blk) { /* Initial group could be 0 digits long! */
+ blk = nblk2;
+ } else if (len >= blk) { /* Enough digits for a group. */
+/* printf("norm: len=%d blk=%d \"%.*s\"\n", len, blk, blk, gp); */
+ fp_outfunc(fp, *ppc, blk, (intptr_t) gp);
+ assert(gp);
+ if (*gp) {
+ gp += blk;
+ }
+ len -= blk;
+ } else { /* Transition to 0s. */
+/* printf("trans: len=%d blk=%d \"%.*s\"\n", len, blk, len, gp); */
+ if (len) {
+/* printf("len\n"); */
+ fp_outfunc(fp, *ppc, len, (intptr_t) gp);
+ gp += len;
+ }
+
+ if (ppc[3] == FPO_ZERO_PAD) { /* Need to group 0s */
+/* printf("zeropad\n"); */
+ cnt += ppc[1];
+ ppc += 3;
+ gp = (const char *) ppc[2];
+ blk -= len; /* blk > len, so blk still > 0. */
+ len = ppc[1];
+ continue; /* Don't decrement num_groups here. */
+ } else {
+ assert(num_groups == 0);
+ break;
+ }
+ }
+
+ if (num_groups <= 0) {
+ break;
+ }
+ --num_groups;
+
+ fp_outfunc(fp, FPO_STR_PREC, tslen, (intptr_t) ts);
+ blk = nblk2;
+
+/* printf("num_groups=%d blk=%d\n", num_groups, blk); */
+
+ } while (1);
+ } else
+
+#endif /* __UCLIBC_HAS_GLIBC_DIGIT_GROUPING__ */
+
+ fp_outfunc(fp, *ppc, ppc[1], ppc[2]); /* NOTE: Remember 'else' above! */
+
+ cnt += ppc[1];
+ ppc += 3;
+ } while (ppc < ppc_last);
+
+ return cnt;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 05:45:20 +0000