forked from KolibriOS/kolibrios
printf fixes
git-svn-id: svn://kolibrios.org@6425 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
siemargl
parent
af35cc6783
commit
1499413a0c
@ -6,19 +6,17 @@ http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap05.html is used
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%g explain https://support.microsoft.com/en-us/kb/43392
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todo:
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-%e
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-simplify justifying
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-fix %o, %x
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-fix precision in %g
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-%u printed as signed, %x, %o also is promoted to long long
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// FAIL 0x0FFFF7A7E as %x - signed long promotes sign, need %llx or %Lx and type conversion
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-%a
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-NAN, INF
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-%n nothing printed
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-%17.18f digits maximum format
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%C as w_char L'x'
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-use %C as w_char L'x' (non standard extension)
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-radix point always '.', no LOCALEs
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*/
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//#include <kolibrisys.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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@ -36,11 +34,150 @@ enum flags_t
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flag_hash_sign = 0x80,
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flag_point = 0x100
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};
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int formatted_double_to_string(long double number, int format1, int format2, char *s, int flags);
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int formatted_double_to_string_scientific(long double number, int format1, int format2, char *s, int flags);
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int formatted_long_to_string(long long number, int format1, int prec, char *s, int flags);
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int formatted_hex_to_string(unsigned long long number, int fmt1, int prec, char *s, int flags);
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int formatted_octa_to_string(unsigned long long number, int fmt1, int prec, char *s, int flags);
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int formatted_double_special(long double number, char *s)
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// return 0 if no special values: NAN, INF. -0.0 ignored
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// http://steve.hollasch.net/cgindex/coding/ieeefloat.html
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{
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struct IEEExp {
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unsigned manl:32;
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unsigned manh:32;
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unsigned exp:15;
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unsigned sign:1;
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} *ip = (struct IEEExp *)&number;
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if (ip->exp != 0x7fff) return 0;
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if (ip->manh == 0x80000000 && ip->manl == 0) // Inf
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{
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if(ip->sign)
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strcpy(s, "-INF");
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else
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strcpy(s, "+INF");
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} else
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if (ip->manh & ~0x7fffffff)
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strcpy(s, "QNaN");
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else
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strcpy(s, "SNaN");
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return 4;
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}
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int copy_and_align(char *dest, int width, char *src, int src_len, char sign, int flags)
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// alingn number in buffer, put sign and fills additional places
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// flags used only flag_left_just and flag_lead_zeros
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// sign can be zero, 0, x, X, space, +, -
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{
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int rc = 0, sign_len;
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char fill;
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fill = (flags & flag_lead_zeros) ? '0' : ' ';
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if(sign == 'x' || sign == 'X')
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{
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sign_len = 2;
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} else
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if (sign)
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sign_len = 1;
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else
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sign_len = 0;
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if ((flags & flag_left_just) || (src_len + sign_len >= width)) // left justify or no room
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{
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if (sign)
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{
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if(sign == 'x' || sign == 'X')
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{
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dest[0] = '0';
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dest[1] = sign;
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memcpy(dest + 2, src, src_len);
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rc = src_len + 2;
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} else
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{ // single sign
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dest[0] = sign;
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memcpy(dest + 1, src, src_len);
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rc = src_len + 1;
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}
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} else
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{
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memcpy(dest, src, src_len);
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rc = src_len;
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}
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if (rc < width)
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{
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memset(dest + rc, fill, width - rc);
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rc = width;
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}
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} else // right justify and fill
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{
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rc = width;
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memcpy(dest + width - src_len, src, src_len);
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memset(dest, fill, width - src_len);
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if (flags & flag_lead_zeros)
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{
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if(sign == 'x' || sign == 'X')
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{
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dest[0] = '0';
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dest[1] = sign;
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} else
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if (sign) dest[0] = sign;
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} else
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{
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if(sign == 'x' || sign == 'X')
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{
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dest[width - src_len - 2] = '0';
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dest[width - src_len - 1] = sign;
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} else
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if (sign) dest[width - src_len - 1] = sign;
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}
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}
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return rc;
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}
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int formatted_double_to_string_scientific(long double number, int format1, int format2, char *s, int flags)
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{
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strcpy(s, "%e not implemented yet, sorry");
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return strlen(s);
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long double norm_digit;
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long mul = 0;
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char sign = 0;
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char buf[50];
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int len;
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if((flags & flag_point) == 0) format2 = 6; // default prec if no point spec
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len = formatted_double_special(number, buf);
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if (len == 0)
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{
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if (number < 0) { sign = '-'; norm_digit = -number; }
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else
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{
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norm_digit = number;
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if (flags & flag_plus) sign = '+'; else
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if (flags & flag_space_plus) sign = ' ';
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}
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// normalize
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while (norm_digit < 1.0) { norm_digit *= 10; mul--; }
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while (norm_digit >= 10.0) { norm_digit /= 10; mul++; }
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len = formatted_double_to_string(norm_digit, 0, format2, buf, flags & ~(flag_plus | flag_space_plus));
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if (flags & flag_register)
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buf[len++] = 'E';
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else
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buf[len++] = 'e';
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len += formatted_long_to_string(mul, 0, 3, buf + len, flag_plus | flag_lead_zeros);
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}
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else
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flags &= ~flag_lead_zeros; // no need for INF, NAN
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len = copy_and_align(s, format1, buf, len, sign, flags);
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return len;
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}
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int formatted_double_to_string(long double number, int format1, int format2, char *s, int flags)
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@ -49,7 +186,7 @@ int formatted_double_to_string(long double number, int format1, int format2, cha
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long long intdigit, mul;
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int div;
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int i;
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char* size;
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char sign = 0;
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int fmt1;
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int fmt2;
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char buf[100], *pbuf = buf;
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@ -57,12 +194,14 @@ int formatted_double_to_string(long double number, int format1, int format2, cha
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if((flags & flag_point) == 0) format2 = 6; // default prec if no point spec
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size = s;
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if (number < 0) {*s++ = '-'; number = -number; }
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i = formatted_double_special(number, buf);
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if (i == 0)
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{
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if (number < 0) {sign = '-'; number = -number; }
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else
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{
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if (flags & flag_plus) *s++ = '+'; else
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if (flags & flag_space_plus) *s++ = ' ';
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if (flags & flag_plus) sign = '+'; else
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if (flags & flag_space_plus) sign = ' ';
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}
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fmt1 = 1;
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@ -116,41 +255,28 @@ int formatted_double_to_string(long double number, int format1, int format2, cha
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}
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*pbuf_lo++ = (char)intdigit + '0';
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memcpy(s, buf, pbuf - buf); s += pbuf - buf;
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// form full number
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if (roundl(nafter) != 0 || fmt2 != 0)
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{
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*s++ = '.';
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memcpy(s, buf_low, pbuf_lo - buf_low); s += pbuf_lo - buf_low;
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*pbuf++ = '.';
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memcpy(pbuf, buf_low, pbuf_lo - buf_low); pbuf += pbuf_lo - buf_low;
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} else if (flags & flag_hash_sign)
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*s++ = '.';
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// right justifiyng and forward zeros
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div = (s - size);
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if ((flags & flag_left_just) == 0 && div < format1)
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{
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pbuf = size;
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if ((flags & flag_lead_zeros) != 0)
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if (*pbuf == '+' || *pbuf == '-' || *pbuf == ' ') { pbuf++; div--; } // sign already at place
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for (i = 0; i < div; i++)
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size[format1 - i - 1] = pbuf[div - 1 - i];
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for (i = 0; i < format1 - div - (pbuf - size); i++)
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if (flags & flag_lead_zeros)
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pbuf[i] = '0';
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*pbuf++ = '.';
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}
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else
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pbuf[i] = ' ';
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return format1;
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{
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flags &= ~flag_lead_zeros; // no need for INF, NAN
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pbuf += i;
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}
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return s - size;
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return copy_and_align(s, format1, buf, pbuf - buf, sign, flags);
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}
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int formatted_long_to_string(long long number, int format1, int prec, char *s, int flags)
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{
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int i;
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int fmt;
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char* size = s;
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char sign = 0;
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long long digit;
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long long mul;
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int div;
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@ -158,19 +284,17 @@ int formatted_long_to_string(long long number, int format1, int prec, char *s, i
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if (number == -9223372036854775807LL - 1) // overflow all our math, cant minus this
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{
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strcpy(buf, "9223372036854775808");
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pbuf += 19;
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*s++ = '-';
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goto verybig;
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strcpy(s, "-9223372036854775808");
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return strlen(s);
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}
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if (flags & flag_point) flags &= ~flag_lead_zeros; // conflicting flags
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if (number < 0) {*s++ = '-'; number = -number; }
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if (number < 0) {sign = '-'; number = -number; }
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else
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{
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if (flags & flag_plus) *s++ = '+'; else
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if (flags & flag_space_plus) *s++ = ' ';
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if (flags & flag_plus) sign = '+'; else
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if (flags & flag_space_plus) sign = ' ';
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}
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digit = number;
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@ -183,7 +307,7 @@ int formatted_long_to_string(long long number, int format1, int prec, char *s, i
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mul *= 10;
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}
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// add leading zeros
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// add leading zeros by prec
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for(i = 0; i < prec - fmt; i++) *pbuf++ = '0';
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for(i = 0; i < fmt - 1; i++)
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@ -196,136 +320,98 @@ int formatted_long_to_string(long long number, int format1, int prec, char *s, i
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}
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*pbuf++ = (char)digit + '0';
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verybig:
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memcpy(s, buf, pbuf - buf); s += pbuf - buf;
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// right justifiyng and forward zeros
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div = (s - size);
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if ((flags & flag_left_just) == 0 && div < format1)
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{
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pbuf = size;
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if ((flags & flag_lead_zeros) != 0)
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if (*pbuf == '+' || *pbuf == '-' || *pbuf == ' ') { pbuf++; div--; } // sign already at place
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for (i = 0; i < div; i++)
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size[format1 - i - 1] = pbuf[div - 1 - i];
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for (i = 0; i < format1 - div - (pbuf - size); i++)
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if (flags & flag_lead_zeros)
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pbuf[i] = '0';
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else
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pbuf[i] = ' ';
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return format1;
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return copy_and_align(s, format1, buf, pbuf - buf, sign, flags);
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}
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return s - size;
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}
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int formatted_hex_to_string(long long number, int fmt1, char *s, int flags)
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int formatted_hex_to_string(unsigned long long number, int fmt1, int prec, char *s, int flags)
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{
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long n;
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int i,pos;
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// int fmt;
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long size;
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int difference_pos;
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unsigned long long digit, mul;
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int i, div, fmt;
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char xdigs_lower[16]="0123456789abcdef";
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char xdigs_upper[16]="0123456789ABCDEF";
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char buf[200];
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char buf[50], *pbuf = buf, sign;
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n=(long)number;
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size=(int)s;
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if (n<0) {*s='-';s++;n=-n;}
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if (n==0) {*s='0';s++;goto end;}
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for(i=0;i<200;i++) {buf[i]=0;}
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i=0;
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if (flag_register==0)
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if (number == -9223372036854775807LL - 1) // overflow all our math, cant minus this
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{
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while (n>0)
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{
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buf[i]=xdigs_lower[n & 15];
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n=n>>4;
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i++;
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}
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strcpy(buf, "FFFFFFFFFFFFFFFF");
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pbuf += strlen(buf);
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}
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else
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{
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while (n>0)
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if (flags & flag_point) flags &= ~flag_lead_zeros; // conflicting flags
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digit = number;
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mul = (digit < 0) ? -1 : 1;
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for(i = 0; i < sizeof buf - 2; i++)
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{
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buf[i]=xdigs_upper[n & 15];
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n=n>>4;
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i++;
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}
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if (digit / mul < 16) { fmt = i + 1; break; }
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mul <<= 4;
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}
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pos=i;
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difference_pos=i;
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// add leading zeros by prec
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for(i = 0; i < prec - fmt; i++) *pbuf++ = '0';
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for(i=pos-1;i>=0;i--)
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for(i = 0; i < fmt - 1; i++)
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{
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*s=buf[i];
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s++;
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div = digit / mul;
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*pbuf++ = (flags & flag_register) ? xdigs_upper[div] : xdigs_lower[div];
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digit = digit - div * mul;
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mul >>= 4;
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if (mul == 1 || mul == -1) break;
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}
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*pbuf++ = (flags & flag_register) ? xdigs_upper[digit] : xdigs_lower[digit];
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}
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if (fmt1-difference_pos>0)
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{
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for(i=difference_pos+1;i<=fmt1;i++)
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{
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*s=' ';
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s++;
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}
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}
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end:size=(int)s-size;
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return(size);
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sign = 0;
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if(flags & flag_hash_sign)
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sign = (flags & flag_register) ? 'X' : 'x';
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return copy_and_align(s, fmt1, buf, pbuf - buf, sign, flags);
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}
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int formatted_octa_to_string(long long number, int fmt1, char *s, int flags)
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int formatted_octa_to_string(unsigned long long number, int fmt1, int prec, char *s, int flags)
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{
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long n;
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int i,pos;
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// int fmt;
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long size;
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int difference_pos;
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char xdigs_lower[16]="012345678";
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char buf[200];
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unsigned long long digit, mul;
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int i, div, fmt;
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char xdigs_lower[16]="01234567";
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char buf[50], *pbuf = buf;
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n=number;
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size=(int)s;
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if (n<0) {*s='-';s++;n=-n;}
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if (n==0) {*s='0';s++;goto end;}
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for(i=0;i<200;i++) {buf[i]=0;}
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i=0;
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if (flag_register==0)
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if (number == -9223372036854775807LL - 1) // overflow all our math, cant minus this
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{
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while (n>0)
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{
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buf[i]=xdigs_lower[n & 7];
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n=n>>3;
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i++;
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strcpy(buf, "1777777777777777777777");
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pbuf += strlen(buf);
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}
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else
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{
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if (flags & flag_point) flags &= ~flag_lead_zeros; // conflicting flags
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digit = number;
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mul = (digit < 0) ? -1 : 1;
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for(i = 0; i < sizeof buf - 2; i++)
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{
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if (digit / mul < 8) { fmt = i + 1; break; }
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mul <<= 3;
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}
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pos=i;
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difference_pos=i;
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// add leading zeros by prec
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for(i = 0; i < prec - fmt; i++) *pbuf++ = '0';
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for(i=pos-1;i>=0;i--)
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for(i = 0; i < fmt - 1; i++)
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{
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*s=buf[i];
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s++;
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div = digit / mul;
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*pbuf++ = xdigs_lower[div & 0x7];
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digit = digit - div * mul;
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mul >>= 3;
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if (mul == 1 || mul == -1) break;
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}
|
||||
*pbuf++ = xdigs_lower[digit];
|
||||
}
|
||||
|
||||
if (fmt1-difference_pos>0)
|
||||
{
|
||||
for(i=difference_pos+1;i<=fmt1;i++)
|
||||
{
|
||||
*s=' ';
|
||||
s++;
|
||||
}
|
||||
}
|
||||
end:size=(int)s-size;
|
||||
return(size);
|
||||
return copy_and_align(s, fmt1, buf, pbuf - buf, (flags & flag_hash_sign) ? '0' : 0, flags);
|
||||
}
|
||||
|
||||
//int vsnprintf (char * s, size_t n, const char * format, va_list arg );
|
||||
@ -337,7 +423,6 @@ int format_print(char *dest, size_t maxlen, const char *fmt0, va_list argp)
|
||||
size_t pos, posc;
|
||||
long long intdigit;
|
||||
long double doubledigit;
|
||||
// float floatdigit;
|
||||
const char *fmt, *fmtc; // first point to %, fmtc points to specifier
|
||||
char *s; // pointer to current dest char
|
||||
char *str;
|
||||
@ -473,7 +558,6 @@ int format_print(char *dest, size_t maxlen, const char *fmt0, va_list argp)
|
||||
}
|
||||
|
||||
// do real work - format arguments values
|
||||
|
||||
length = 0;
|
||||
switch(*fmtc)
|
||||
{
|
||||
@ -506,13 +590,13 @@ int format_print(char *dest, size_t maxlen, const char *fmt0, va_list argp)
|
||||
if (flag_long == 0) intdigit = va_arg(argp, int); else
|
||||
if (flag_long == 1) intdigit = va_arg(argp, long); else
|
||||
if (flag_long == 2) intdigit = va_arg(argp, long long);
|
||||
length = formatted_octa_to_string(intdigit, fmt1, buf, flags);
|
||||
length = formatted_octa_to_string(intdigit, fmt1, fmt2, buf, flags);
|
||||
break;
|
||||
case 'p': case 'P': case 'x': case 'X':
|
||||
if (flag_long == 0) intdigit = va_arg(argp, int); else
|
||||
if (flag_long == 1) intdigit = va_arg(argp, long); else
|
||||
if (flag_long == 2) intdigit = va_arg(argp, long long);
|
||||
length=formatted_hex_to_string(intdigit, fmt1, buf, flags);
|
||||
length=formatted_hex_to_string(intdigit, fmt1, fmt2, buf, flags);
|
||||
break;
|
||||
case 'a': case 'A': case 'f': case 'F':
|
||||
if (flag_long <= 1) doubledigit = va_arg(argp, double); else
|
||||
|
||||
Loading…
Reference in New Issue
Block a user