py/pfenv.c - lite/micropython - Linaro Git Browser

 /*
  * This file is part of the Micro Python project, http://micropython.org/
  *
  * The MIT License (MIT)
  *
  * Copyright (c) 2013, 2014 Damien P. George
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 #include <stdint.h>
 #include <string.h>

 #include "mpconfig.h"
 #include "misc.h"
 #include "qstr.h"
 #include "obj.h"
 #include "mpz.h"
 #include "objint.h"
 #include "pfenv.h"

 #if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
 #include <stdio.h>
 #endif

 #if MICROPY_PY_BUILTINS_FLOAT
 #include "formatfloat.h"
 #endif

 static const char pad_spaces[] = "                ";
 static const char pad_zeroes[] = "0000000000000000";

 void pfenv_vstr_add_strn(void *data, const char *str, mp_uint_t len){
     vstr_add_strn(data, str, len);
 }

 int pfenv_print_strn(const pfenv_t *pfenv, const char *str, mp_uint_t len, int flags, char fill, int width) {
     int left_pad = 0;
     int right_pad = 0;
     int pad = width - len;
     int pad_size;
     int total_chars_printed = 0;
     const char *pad_chars;

     if (!fill || fill == ' ' ) {
         pad_chars = pad_spaces;
         pad_size = sizeof(pad_spaces) - 1;
     } else if (fill == '0') {
         pad_chars = pad_zeroes;
         pad_size = sizeof(pad_zeroes) - 1;
     } else {
         // Other pad characters are fairly unusual, so we'll take the hit
         // and output them 1 at a time.
         pad_chars = &fill;
         pad_size = 1;
     }

     if (flags & PF_FLAG_CENTER_ADJUST) {
         left_pad = pad / 2;
         right_pad = pad - left_pad;
     } else if (flags & PF_FLAG_LEFT_ADJUST) {
         right_pad = pad;
     } else {
         left_pad = pad;
     }

     if (left_pad > 0) {
         total_chars_printed += left_pad;
         while (left_pad > 0) {
             int p = left_pad;
             if (p > pad_size) {
                 p = pad_size;
             }
             pfenv->print_strn(pfenv->data, pad_chars, p);
             left_pad -= p;
         }
     }
     if (len) {
         pfenv->print_strn(pfenv->data, str, len);
         total_chars_printed += len;
     }
     if (right_pad > 0) {
         total_chars_printed += right_pad;
         while (right_pad > 0) {
             int p = right_pad;
             if (p > pad_size) {
                 p = pad_size;
             }
             pfenv->print_strn(pfenv->data, pad_chars, p);
             right_pad -= p;
         }
     }
     return total_chars_printed;
 }

 // 32-bits is 10 digits, add 3 for commas, 1 for sign, 1 for terminating null
 // We can use 16 characters for 32-bit and 32 characters for 64-bit
 #define INT_BUF_SIZE (sizeof(mp_int_t) * 4)

 // This function is used by stmhal port to implement printf.
 // It needs to be a separate function to pfenv_print_mp_int, since converting to a mp_int looses the MSB.
 int pfenv_print_int(const pfenv_t *pfenv, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
     char sign = 0;
     if (sgn) {
         if ((mp_int_t)x < 0) {
             sign = '-';
             x = -x;
         } else if (flags & PF_FLAG_SHOW_SIGN) {
             sign = '+';
         } else if (flags & PF_FLAG_SPACE_SIGN) {
             sign = ' ';
         }
     }

     char buf[INT_BUF_SIZE];
     char *b = buf + INT_BUF_SIZE;

     if (x == 0) {
         *(--b) = '0';
     } else {
         do {
             int c = x % base;
             x /= base;
             if (c >= 10) {
                 c += base_char - 10;
             } else {
                 c += '0';
             }
             *(--b) = c;
         } while (b > buf && x != 0);
     }

     char prefix_char = '\0';

     if (flags & PF_FLAG_SHOW_PREFIX) {
         if (base == 2) {
             prefix_char = base_char + 'b' - 'a';
         } else if (base == 8) {
             prefix_char = base_char + 'o' - 'a';
         } else if (base == 16) {
             prefix_char = base_char + 'x' - 'a';
         }
     }

     int len = 0;
     if (flags & PF_FLAG_PAD_AFTER_SIGN) {
         if (sign) {
             len += pfenv_print_strn(pfenv, &sign, 1, flags, fill, 1);
             width--;
         }
         if (prefix_char) {
             len += pfenv_print_strn(pfenv, "0", 1, flags, fill, 1);
             len += pfenv_print_strn(pfenv, &prefix_char, 1, flags, fill, 1);
             width -= 2;
         }
     } else {
         if (prefix_char && b > &buf[1]) {
             *(--b) = prefix_char;
             *(--b) = '0';
         }
         if (sign && b > buf) {
             *(--b) = sign;
         }
     }

     len += pfenv_print_strn(pfenv, b, buf + INT_BUF_SIZE - b, flags, fill, width);
     return len;
 }

 int pfenv_print_mp_int(const pfenv_t *pfenv, mp_obj_t x, int sgn, int base, int base_char, int flags, char fill, int width, int prec) {
     if (!MP_OBJ_IS_INT(x)) {
         // This will convert booleans to int, or raise an error for
         // non-integer types.
         x = MP_OBJ_NEW_SMALL_INT(mp_obj_get_int(x));
     }

     if ((flags & (PF_FLAG_LEFT_ADJUST | PF_FLAG_CENTER_ADJUST)) == 0 && fill == '0') {
         if (prec > width) {
             width = prec;
         }
         prec = 0;
     }
     char prefix_buf[4];
     char *prefix = prefix_buf;

     if (mp_obj_int_is_positive(x)) {
         if (flags & PF_FLAG_SHOW_SIGN) {
             *prefix++ = '+';
         } else if (flags & PF_FLAG_SPACE_SIGN) {
             *prefix++ = ' ';
         }
     }

     if (flags & PF_FLAG_SHOW_PREFIX) {
         if (base == 2) {
             *prefix++ = '0';
             *prefix++ = base_char + 'b' - 'a';
         } else if (base == 8) {
             *prefix++ = '0';
             if (flags & PF_FLAG_SHOW_OCTAL_LETTER) {
                 *prefix++ = base_char + 'o' - 'a';
             }
         } else if (base == 16) {
             *prefix++ = '0';
             *prefix++ = base_char + 'x' - 'a';
         }
     }
     *prefix = '\0';
     int prefix_len = prefix - prefix_buf;
     prefix = prefix_buf;

     char comma = '\0';
     if (flags & PF_FLAG_SHOW_COMMA) {
         comma = ',';
     }

     // The size of this buffer is rather arbitrary. If it's not large
     // enough, a dynamic one will be allocated.
     char stack_buf[sizeof(mp_int_t) * 4];
     char *buf = stack_buf;
     mp_uint_t buf_size = sizeof(stack_buf);
     mp_uint_t fmt_size = 0;
     char *str;

     if (prec > 1) {
         flags |= PF_FLAG_PAD_AFTER_SIGN;
     }
     char sign = '\0';
     if (flags & PF_FLAG_PAD_AFTER_SIGN) {
         // We add the pad in this function, so since the pad goes after
         // the sign & prefix, we format without a prefix
         str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
                                    x, base, NULL, base_char, comma);
         if (*str == '-') {
             sign = *str++;
             fmt_size--;
         }
     } else {
         str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
                                    x, base, prefix, base_char, comma);
     }

     int spaces_before = 0;
     int spaces_after = 0;

     if (prec > 1) {
         // If prec was specified, then prec specifies the width to zero-pad the
         // the number to. This zero-padded number then gets left or right
         // aligned in width characters.

         int prec_width = fmt_size;  // The digits
         if (prec_width < prec) {
             prec_width = prec;
         }
         if (flags & PF_FLAG_PAD_AFTER_SIGN) {
             if (sign) {
                 prec_width++;
             }
             prec_width += prefix_len;
         }
         if (prec_width < width) {
             if (flags & PF_FLAG_LEFT_ADJUST) {
                 spaces_after = width - prec_width;
             } else {
                 spaces_before = width - prec_width;
             }
         }
         fill = '0';
         flags &= ~PF_FLAG_LEFT_ADJUST;
     }

     int len = 0;
     if (spaces_before) {
         len += pfenv_print_strn(pfenv, "", 0, 0, ' ', spaces_before);
     }
     if (flags & PF_FLAG_PAD_AFTER_SIGN) {
         // pad after sign implies pad after prefix as well.
         if (sign) {
             len += pfenv_print_strn(pfenv, &sign, 1, 0, 0, 1);
             width--;
         }
         if (prefix_len) {
             len += pfenv_print_strn(pfenv, prefix, prefix_len, 0, 0, 1);
             width -= prefix_len;
         }
     }
     if (prec > 1) {
         width = prec;
     }

     len += pfenv_print_strn(pfenv, str, fmt_size, flags, fill, width);

     if (spaces_after) {
         len += pfenv_print_strn(pfenv, "", 0, 0, ' ', spaces_after);
     }

     if (buf != stack_buf) {
         m_free(buf, buf_size);
     }
     return len;
 }

 #if MICROPY_PY_BUILTINS_FLOAT
 int pfenv_print_float(const pfenv_t *pfenv, mp_float_t f, char fmt, int flags, char fill, int width, int prec) {
     char buf[32];
     char sign = '\0';
     int chrs = 0;

     if (flags & PF_FLAG_SHOW_SIGN) {
         sign = '+';
     }
     else
     if (flags & PF_FLAG_SPACE_SIGN) {
         sign = ' ';
     }
     int len;
 #if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
     len = format_float(f, buf, sizeof(buf), fmt, prec, sign);
 #elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
     char fmt_buf[6];
     char *fmt_s = fmt_buf;

     *fmt_s++ = '%';
     if (sign) {
         *fmt_s++ = sign;
     }
     *fmt_s++ = '.';
     *fmt_s++ = '*';
     *fmt_s++ = fmt;
     *fmt_s = '\0';

     len = snprintf(buf, sizeof(buf), fmt_buf, prec, f);
 #else
 #error Unknown MICROPY FLOAT IMPL
 #endif
     char *s = buf;

     if ((flags & PF_FLAG_ADD_PERCENT) && (len + 1) < sizeof(buf)) {
         buf[len++] = '%';
         buf[len] = '\0';
     }

     // buf[0] < '0' returns true if the first character is space, + or -
     if ((flags & PF_FLAG_PAD_AFTER_SIGN) && buf[0] < '0') {
         // We have a sign character
         s++;
         if (*s <= '9' || (flags & PF_FLAG_PAD_NAN_INF)) {
             // We have a number, or we have a inf/nan and PAD_NAN_INF is set
             // With '{:06e}'.format(float('-inf')) you get '-00inf'
             chrs += pfenv_print_strn(pfenv, &buf[0], 1, 0, 0, 1);
             width--;
             len--;
         }
     }

     if (*s > 'A' && (flags & PF_FLAG_PAD_NAN_INF) == 0) {
         // We have one of the inf or nan variants, suppress zero fill.
         // With printf, if you use: printf("%06e", -inf) then you get "  -inf"
         // so suppress the zero fill.
         fill = ' ';
     }
     chrs += pfenv_print_strn(pfenv, s, len, flags, fill, width);

     return chrs;
 }
 #endif
	/*
	* This file is part of the Micro Python project, http://micropython.org/
	*
	* The MIT License (MIT)
	*
	* Copyright (c) 2013, 2014 Damien P. George
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	#include <stdint.h>
	#include <string.h>

	#include "mpconfig.h"
	#include "misc.h"
	#include "qstr.h"
	#include "obj.h"
	#include "mpz.h"
	#include "objint.h"
	#include "pfenv.h"

	#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
	#include <stdio.h>
	#endif

	#if MICROPY_PY_BUILTINS_FLOAT
	#include "formatfloat.h"
	#endif

	static const char pad_spaces[] = " ";
	static const char pad_zeroes[] = "0000000000000000";

	void pfenv_vstr_add_strn(void data, const char str, mp_uint_t len){
	vstr_add_strn(data, str, len);
	}

	int pfenv_print_strn(const pfenv_t pfenv, const char str, mp_uint_t len, int flags, char fill, int width) {
	int left_pad = 0;
	int right_pad = 0;
	int pad = width - len;
	int pad_size;
	int total_chars_printed = 0;
	const char *pad_chars;

	if (!fill \|\| fill == ' ' ) {
	pad_chars = pad_spaces;
	pad_size = sizeof(pad_spaces) - 1;
	} else if (fill == '0') {
	pad_chars = pad_zeroes;
	pad_size = sizeof(pad_zeroes) - 1;
	} else {
	// Other pad characters are fairly unusual, so we'll take the hit
	// and output them 1 at a time.
	pad_chars = &fill;
	pad_size = 1;
	}

	if (flags & PF_FLAG_CENTER_ADJUST) {
	left_pad = pad / 2;
	right_pad = pad - left_pad;
	} else if (flags & PF_FLAG_LEFT_ADJUST) {
	right_pad = pad;
	} else {
	left_pad = pad;
	}

	if (left_pad > 0) {
	total_chars_printed += left_pad;
	while (left_pad > 0) {
	int p = left_pad;
	if (p > pad_size) {
	p = pad_size;
	}
	pfenv->print_strn(pfenv->data, pad_chars, p);
	left_pad -= p;
	}
	}
	if (len) {
	pfenv->print_strn(pfenv->data, str, len);
	total_chars_printed += len;
	}
	if (right_pad > 0) {
	total_chars_printed += right_pad;
	while (right_pad > 0) {
	int p = right_pad;
	if (p > pad_size) {
	p = pad_size;
	}
	pfenv->print_strn(pfenv->data, pad_chars, p);
	right_pad -= p;
	}
	}
	return total_chars_printed;
	}

	// 32-bits is 10 digits, add 3 for commas, 1 for sign, 1 for terminating null
	// We can use 16 characters for 32-bit and 32 characters for 64-bit
	#define INT_BUF_SIZE (sizeof(mp_int_t) * 4)

	// This function is used by stmhal port to implement printf.
	// It needs to be a separate function to pfenv_print_mp_int, since converting to a mp_int looses the MSB.
	int pfenv_print_int(const pfenv_t *pfenv, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
	char sign = 0;
	if (sgn) {
	if ((mp_int_t)x < 0) {
	sign = '-';
	x = -x;
	} else if (flags & PF_FLAG_SHOW_SIGN) {
	sign = '+';
	} else if (flags & PF_FLAG_SPACE_SIGN) {
	sign = ' ';
	}
	}

	char buf[INT_BUF_SIZE];
	char *b = buf + INT_BUF_SIZE;

	if (x == 0) {
	*(--b) = '0';
	} else {
	do {
	int c = x % base;
	x /= base;
	if (c >= 10) {
	c += base_char - 10;
	} else {
	c += '0';
	}
	*(--b) = c;
	} while (b > buf && x != 0);
	}

	char prefix_char = '\0';

	if (flags & PF_FLAG_SHOW_PREFIX) {
	if (base == 2) {
	prefix_char = base_char + 'b' - 'a';
	} else if (base == 8) {
	prefix_char = base_char + 'o' - 'a';
	} else if (base == 16) {
	prefix_char = base_char + 'x' - 'a';
	}
	}

	int len = 0;
	if (flags & PF_FLAG_PAD_AFTER_SIGN) {
	if (sign) {
	len += pfenv_print_strn(pfenv, &sign, 1, flags, fill, 1);
	width--;
	}
	if (prefix_char) {
	len += pfenv_print_strn(pfenv, "0", 1, flags, fill, 1);
	len += pfenv_print_strn(pfenv, &prefix_char, 1, flags, fill, 1);
	width -= 2;
	}
	} else {
	if (prefix_char && b > &buf[1]) {
	*(--b) = prefix_char;
	*(--b) = '0';
	}
	if (sign && b > buf) {
	*(--b) = sign;
	}
	}

	len += pfenv_print_strn(pfenv, b, buf + INT_BUF_SIZE - b, flags, fill, width);
	return len;
	}

	int pfenv_print_mp_int(const pfenv_t *pfenv, mp_obj_t x, int sgn, int base, int base_char, int flags, char fill, int width, int prec) {
	if (!MP_OBJ_IS_INT(x)) {
	// This will convert booleans to int, or raise an error for
	// non-integer types.
	x = MP_OBJ_NEW_SMALL_INT(mp_obj_get_int(x));
	}

	if ((flags & (PF_FLAG_LEFT_ADJUST \| PF_FLAG_CENTER_ADJUST)) == 0 && fill == '0') {
	if (prec > width) {
	width = prec;
	}
	prec = 0;
	}
	char prefix_buf[4];
	char *prefix = prefix_buf;

	if (mp_obj_int_is_positive(x)) {
	if (flags & PF_FLAG_SHOW_SIGN) {
	*prefix++ = '+';
	} else if (flags & PF_FLAG_SPACE_SIGN) {
	*prefix++ = ' ';
	}
	}

	if (flags & PF_FLAG_SHOW_PREFIX) {
	if (base == 2) {
	*prefix++ = '0';
	*prefix++ = base_char + 'b' - 'a';
	} else if (base == 8) {
	*prefix++ = '0';
	if (flags & PF_FLAG_SHOW_OCTAL_LETTER) {
	*prefix++ = base_char + 'o' - 'a';
	}
	} else if (base == 16) {
	*prefix++ = '0';
	*prefix++ = base_char + 'x' - 'a';
	}
	}
	*prefix = '\0';
	int prefix_len = prefix - prefix_buf;
	prefix = prefix_buf;

	char comma = '\0';
	if (flags & PF_FLAG_SHOW_COMMA) {
	comma = ',';
	}

	// The size of this buffer is rather arbitrary. If it's not large
	// enough, a dynamic one will be allocated.
	char stack_buf[sizeof(mp_int_t) * 4];
	char *buf = stack_buf;
	mp_uint_t buf_size = sizeof(stack_buf);
	mp_uint_t fmt_size = 0;
	char *str;

	if (prec > 1) {
	flags \|= PF_FLAG_PAD_AFTER_SIGN;
	}
	char sign = '\0';
	if (flags & PF_FLAG_PAD_AFTER_SIGN) {
	// We add the pad in this function, so since the pad goes after
	// the sign & prefix, we format without a prefix
	str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
	x, base, NULL, base_char, comma);
	if (*str == '-') {
	sign = *str++;
	fmt_size--;
	}
	} else {
	str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
	x, base, prefix, base_char, comma);
	}

	int spaces_before = 0;
	int spaces_after = 0;

	if (prec > 1) {
	// If prec was specified, then prec specifies the width to zero-pad the
	// the number to. This zero-padded number then gets left or right
	// aligned in width characters.

	int prec_width = fmt_size; // The digits
	if (prec_width < prec) {
	prec_width = prec;
	}
	if (flags & PF_FLAG_PAD_AFTER_SIGN) {
	if (sign) {
	prec_width++;
	}
	prec_width += prefix_len;
	}
	if (prec_width < width) {
	if (flags & PF_FLAG_LEFT_ADJUST) {
	spaces_after = width - prec_width;
	} else {
	spaces_before = width - prec_width;
	}
	}
	fill = '0';
	flags &= ~PF_FLAG_LEFT_ADJUST;
	}

	int len = 0;
	if (spaces_before) {
	len += pfenv_print_strn(pfenv, "", 0, 0, ' ', spaces_before);
	}
	if (flags & PF_FLAG_PAD_AFTER_SIGN) {
	// pad after sign implies pad after prefix as well.
	if (sign) {
	len += pfenv_print_strn(pfenv, &sign, 1, 0, 0, 1);
	width--;
	}
	if (prefix_len) {
	len += pfenv_print_strn(pfenv, prefix, prefix_len, 0, 0, 1);
	width -= prefix_len;
	}
	}
	if (prec > 1) {
	width = prec;
	}

	len += pfenv_print_strn(pfenv, str, fmt_size, flags, fill, width);

	if (spaces_after) {
	len += pfenv_print_strn(pfenv, "", 0, 0, ' ', spaces_after);
	}

	if (buf != stack_buf) {
	m_free(buf, buf_size);
	}
	return len;
	}

	#if MICROPY_PY_BUILTINS_FLOAT
	int pfenv_print_float(const pfenv_t *pfenv, mp_float_t f, char fmt, int flags, char fill, int width, int prec) {
	char buf[32];
	char sign = '\0';
	int chrs = 0;

	if (flags & PF_FLAG_SHOW_SIGN) {
	sign = '+';
	}
	else
	if (flags & PF_FLAG_SPACE_SIGN) {
	sign = ' ';
	}
	int len;
	#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
	len = format_float(f, buf, sizeof(buf), fmt, prec, sign);
	#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
	char fmt_buf[6];
	char *fmt_s = fmt_buf;

	*fmt_s++ = '%';
	if (sign) {
	*fmt_s++ = sign;
	}
	*fmt_s++ = '.';
	fmt_s++ = '';
	*fmt_s++ = fmt;
	*fmt_s = '\0';

	len = snprintf(buf, sizeof(buf), fmt_buf, prec, f);
	#else
	#error Unknown MICROPY FLOAT IMPL
	#endif
	char *s = buf;

	if ((flags & PF_FLAG_ADD_PERCENT) && (len + 1) < sizeof(buf)) {
	buf[len++] = '%';
	buf[len] = '\0';
	}

	// buf[0] < '0' returns true if the first character is space, + or -
	if ((flags & PF_FLAG_PAD_AFTER_SIGN) && buf[0] < '0') {
	// We have a sign character
	s++;
	if (*s <= '9' \|\| (flags & PF_FLAG_PAD_NAN_INF)) {
	// We have a number, or we have a inf/nan and PAD_NAN_INF is set
	// With '{:06e}'.format(float('-inf')) you get '-00inf'
	chrs += pfenv_print_strn(pfenv, &buf[0], 1, 0, 0, 1);
	width--;
	len--;
	}
	}

	if (*s > 'A' && (flags & PF_FLAG_PAD_NAN_INF) == 0) {
	// We have one of the inf or nan variants, suppress zero fill.
	// With printf, if you use: printf("%06e", -inf) then you get " -inf"
	// so suppress the zero fill.
	fill = ' ';
	}
	chrs += pfenv_print_strn(pfenv, s, len, flags, fill, width);

	return chrs;
	}
	#endif