FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/sprintf/old/doprnt.c.43tahoe @ 820:c421163143a0
g23m-aci/ksd compiles
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Sun, 05 Apr 2015 17:50:59 +0000 |
parents | 7e45ada9c365 |
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1 /* |
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2 * Copyright (c) 1988 Regents of the University of California. |
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3 * All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms are permitted |
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6 * provided that the above copyright notice and this paragraph are |
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7 * duplicated in all such forms and that any documentation, |
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8 * advertising materials, and other materials related to such |
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9 * distribution and use acknowledge that the software was developed |
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10 * by the University of California, Berkeley. The name of the |
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11 * University may not be used to endorse or promote products derived |
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12 * from this software without specific prior written permission. |
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13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 */ |
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17 |
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18 #if defined(LIBC_SCCS) && !defined(lint) |
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19 static char sccsid[] = "@(#)doprnt.c 5.35 (Berkeley) 6/27/88"; |
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20 #endif /* LIBC_SCCS and not lint */ |
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21 |
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22 #include <sys/types.h> |
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23 #include <varargs.h> |
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24 #include <stdio.h> |
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25 #include <ctype.h> |
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26 |
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27 /* 11-bit exponent (VAX G floating point) is 308 decimal digits */ |
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28 #define MAXEXP 308 |
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29 /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */ |
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30 #define MAXFRACT 39 |
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31 |
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32 #define DEFPREC 6 |
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33 |
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34 #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */ |
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35 |
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36 #define PUTC(ch) (void) putc(ch, fp) |
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37 |
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38 #define ARG() \ |
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39 _ulong = flags&LONGINT ? va_arg(argp, long) : \ |
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40 flags&SHORTINT ? va_arg(argp, short) : va_arg(argp, int); |
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41 |
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42 #define todigit(c) ((c) - '0') |
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43 #define tochar(n) ((n) + '0') |
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44 |
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45 /* have to deal with the negative buffer count kludge */ |
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46 #define NEGATIVE_COUNT_KLUDGE |
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47 |
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48 #define LONGINT 0x01 /* long integer */ |
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49 #define LONGDBL 0x02 /* long double; unimplemented */ |
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50 #define SHORTINT 0x04 /* short integer */ |
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51 #define ALT 0x08 /* alternate form */ |
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52 #define LADJUST 0x10 /* left adjustment */ |
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53 #define ZEROPAD 0x20 /* zero (as opposed to blank) pad */ |
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54 #define HEXPREFIX 0x40 /* add 0x or 0X prefix */ |
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55 |
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56 _doprnt(fmt0, argp, fp) |
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57 u_char *fmt0; |
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58 va_list argp; |
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59 register FILE *fp; |
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60 { |
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61 register u_char *fmt; /* format string */ |
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62 register int ch; /* character from fmt */ |
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63 register int cnt; /* return value accumulator */ |
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64 register int n; /* random handy integer */ |
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65 register char *t; /* buffer pointer */ |
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66 double _double; /* double precision arguments %[eEfgG] */ |
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67 u_long _ulong; /* integer arguments %[diouxX] */ |
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68 int base; /* base for [diouxX] conversion */ |
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69 int dprec; /* decimal precision in [diouxX] */ |
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70 int fieldsz; /* field size expanded by sign, etc */ |
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71 int flags; /* flags as above */ |
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72 int fpprec; /* `extra' floating precision in [eEfgG] */ |
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73 int prec; /* precision from format (%.3d), or -1 */ |
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74 int realsz; /* field size expanded by decimal precision */ |
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75 int size; /* size of converted field or string */ |
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76 int width; /* width from format (%8d), or 0 */ |
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77 char sign; /* sign prefix (' ', '+', '-', or \0) */ |
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78 char softsign; /* temporary negative sign for floats */ |
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79 char *digs; /* digits for [diouxX] conversion */ |
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80 char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ |
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81 |
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82 if (fp->_flag & _IORW) { |
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83 fp->_flag |= _IOWRT; |
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84 fp->_flag &= ~(_IOEOF|_IOREAD); |
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85 } |
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86 if ((fp->_flag & _IOWRT) == 0) |
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87 return (EOF); |
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88 |
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89 fmt = fmt0; |
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90 digs = "0123456789abcdef"; |
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91 for (cnt = 0;; ++fmt) { |
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92 n = fp->_cnt; |
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93 for (t = (char *)fp->_ptr; (ch = *fmt) && ch != '%'; |
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94 ++cnt, ++fmt) |
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95 if (--n < 0 |
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96 #ifdef NEGATIVE_COUNT_KLUDGE |
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97 && (!(fp->_flag & _IOLBF) || -n >= fp->_bufsiz) |
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98 #endif |
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99 || ch == '\n' && fp->_flag & _IOLBF) { |
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100 fp->_cnt = n; |
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101 fp->_ptr = t; |
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102 (void) _flsbuf((u_char)ch, fp); |
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103 n = fp->_cnt; |
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104 t = (char *)fp->_ptr; |
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105 } else |
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106 *t++ = ch; |
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107 fp->_cnt = n; |
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parents:
diff
changeset
|
108 fp->_ptr = t; |
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|
109 if (!ch) |
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changeset
|
110 return (cnt); |
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parents:
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|
111 |
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|
112 flags = 0; dprec = 0; fpprec = 0; width = 0; |
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|
113 prec = -1; |
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parents:
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|
114 sign = '\0'; |
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parents:
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|
115 |
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|
116 rflag: switch (*++fmt) { |
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|
117 case ' ': |
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|
118 /* |
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|
119 * ``If the space and + flags both appear, the space |
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|
120 * flag will be ignored.'' |
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121 * -- ANSI X3J11 |
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|
122 */ |
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|
123 if (!sign) |
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|
124 sign = ' '; |
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parents:
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|
125 goto rflag; |
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changeset
|
126 case '#': |
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127 flags |= ALT; |
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|
128 goto rflag; |
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|
129 case '*': |
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130 /* |
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131 * ``A negative field width argument is taken as a |
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132 * - flag followed by a positive field width.'' |
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133 * -- ANSI X3J11 |
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134 * They don't exclude field widths read from args. |
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|
135 */ |
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|
136 if ((width = va_arg(argp, int)) >= 0) |
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|
137 goto rflag; |
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parents:
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|
138 width = -width; |
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|
139 /* FALLTHROUGH */ |
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|
140 case '-': |
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|
141 flags |= LADJUST; |
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parents:
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|
142 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
143 case '+': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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changeset
|
144 sign = '+'; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
145 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
146 case '.': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
147 if (*++fmt == '*') |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
148 n = va_arg(argp, int); |
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parents:
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|
149 else { |
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parents:
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|
150 n = 0; |
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parents:
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changeset
|
151 while (isascii(*fmt) && isdigit(*fmt)) |
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parents:
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|
152 n = 10 * n + todigit(*fmt++); |
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parents:
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|
153 --fmt; |
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parents:
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changeset
|
154 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
155 prec = n < 0 ? -1 : n; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
156 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
157 case '0': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
158 /* |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
159 * ``Note that 0 is taken as a flag, not as the |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
160 * beginning of a field width.'' |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
161 * -- ANSI X3J11 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
162 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
163 flags |= ZEROPAD; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
164 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
165 case '1': case '2': case '3': case '4': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
166 case '5': case '6': case '7': case '8': case '9': |
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parents:
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changeset
|
167 n = 0; |
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parents:
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changeset
|
168 do { |
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parents:
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|
169 n = 10 * n + todigit(*fmt); |
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|
170 } while (isascii(*++fmt) && isdigit(*fmt)); |
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parents:
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|
171 width = n; |
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|
172 --fmt; |
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parents:
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changeset
|
173 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
174 case 'L': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
175 flags |= LONGDBL; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
176 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
177 case 'h': |
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parents:
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changeset
|
178 flags |= SHORTINT; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
179 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
180 case 'l': |
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parents:
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changeset
|
181 flags |= LONGINT; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
182 goto rflag; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
183 case 'c': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
184 *(t = buf) = va_arg(argp, int); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
185 size = 1; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
186 sign = '\0'; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
187 goto pforw; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
188 case 'D': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
189 flags |= LONGINT; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
190 /*FALLTHROUGH*/ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
191 case 'd': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
192 case 'i': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
193 ARG(); |
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parents:
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changeset
|
194 if ((long)_ulong < 0) { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
195 _ulong = -_ulong; |
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parents:
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|
196 sign = '-'; |
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parents:
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changeset
|
197 } |
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parents:
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changeset
|
198 base = 10; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
199 goto number; |
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parents:
diff
changeset
|
200 case 'e': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
201 case 'E': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
202 case 'f': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
203 case 'g': |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
204 case 'G': |
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parents:
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|
205 _double = va_arg(argp, double); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
206 /* |
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parents:
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|
207 * don't do unrealistic precision; just pad it with |
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parents:
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|
208 * zeroes later, so buffer size stays rational. |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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|
209 */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
210 if (prec > MAXFRACT) { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
211 if (*fmt != 'g' && *fmt != 'G' || (flags&ALT)) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
212 fpprec = prec - MAXFRACT; |
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parents:
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|
213 prec = MAXFRACT; |
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|
214 } |
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|
215 else if (prec == -1) |
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parents:
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|
216 prec = DEFPREC; |
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parents:
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|
217 /* |
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|
218 * softsign avoids negative 0 if _double is < 0 and |
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|
219 * no significant digits will be shown |
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parents:
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|
220 */ |
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parents:
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changeset
|
221 if (_double < 0) { |
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|
222 softsign = '-'; |
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223 _double = -_double; |
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224 } |
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225 else |
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226 softsign = 0; |
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227 /* |
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228 * cvt may have to round up past the "start" of the |
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229 * buffer, i.e. ``intf("%.2f", (double)9.999);''; |
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230 * if the first char isn't NULL, it did. |
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231 */ |
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232 *buf = NULL; |
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233 size = cvt(_double, prec, flags, &softsign, *fmt, buf, |
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234 buf + sizeof(buf)); |
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235 if (softsign) |
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236 sign = '-'; |
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237 t = *buf ? buf : buf + 1; |
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238 goto pforw; |
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239 case 'n': |
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240 if (flags & LONGINT) |
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241 *va_arg(argp, long *) = cnt; |
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242 else if (flags & SHORTINT) |
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243 *va_arg(argp, short *) = cnt; |
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244 else |
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245 *va_arg(argp, int *) = cnt; |
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246 break; |
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247 case 'O': |
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248 flags |= LONGINT; |
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249 /*FALLTHROUGH*/ |
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250 case 'o': |
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251 ARG(); |
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252 base = 8; |
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253 goto nosign; |
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254 case 'p': |
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255 /* |
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256 * ``The argument shall be a pointer to void. The |
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257 * value of the pointer is converted to a sequence |
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258 * of printable characters, in an implementation- |
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259 * defined manner.'' |
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260 * -- ANSI X3J11 |
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261 */ |
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262 /* NOSTRICT */ |
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263 _ulong = (u_long)va_arg(argp, void *); |
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264 base = 16; |
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265 goto nosign; |
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266 case 's': |
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267 if (!(t = va_arg(argp, char *))) |
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268 t = "(null)"; |
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269 if (prec >= 0) { |
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270 /* |
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271 * can't use strlen; can only look for the |
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272 * NUL in the first `prec' characters, and |
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273 * strlen() will go further. |
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274 */ |
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275 char *p, *memchr(); |
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276 |
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277 if (p = memchr(t, 0, prec)) { |
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278 size = p - t; |
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279 if (size > prec) |
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280 size = prec; |
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281 } else |
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282 size = prec; |
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283 } else |
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284 size = strlen(t); |
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285 sign = '\0'; |
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286 goto pforw; |
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287 case 'U': |
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288 flags |= LONGINT; |
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289 /*FALLTHROUGH*/ |
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290 case 'u': |
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291 ARG(); |
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292 base = 10; |
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293 goto nosign; |
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294 case 'X': |
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295 digs = "0123456789ABCDEF"; |
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296 /* FALLTHROUGH */ |
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297 case 'x': |
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298 ARG(); |
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299 base = 16; |
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300 /* leading 0x/X only if non-zero */ |
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301 if (flags & ALT && _ulong != 0) |
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302 flags |= HEXPREFIX; |
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303 |
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304 /* unsigned conversions */ |
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305 nosign: sign = '\0'; |
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306 /* |
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307 * ``... diouXx conversions ... if a precision is |
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308 * specified, the 0 flag will be ignored.'' |
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309 * -- ANSI X3J11 |
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310 */ |
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311 number: if ((dprec = prec) >= 0) |
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312 flags &= ~ZEROPAD; |
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313 |
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314 /* |
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315 * ``The result of converting a zero value with an |
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316 * explicit precision of zero is no characters.'' |
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317 * -- ANSI X3J11 |
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318 */ |
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319 t = buf + BUF; |
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320 if (_ulong != 0 || prec != 0) { |
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321 do { |
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322 *--t = digs[_ulong % base]; |
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323 _ulong /= base; |
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324 } while (_ulong); |
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325 digs = "0123456789abcdef"; |
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326 if (flags & ALT && base == 8 && *t != '0') |
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327 *--t = '0'; /* octal leading 0 */ |
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328 } |
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329 size = buf + BUF - t; |
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330 |
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331 pforw: |
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332 /* |
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333 * All reasonable formats wind up here. At this point, |
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334 * `t' points to a string which (if not flags&LADJUST) |
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335 * should be padded out to `width' places. If |
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336 * flags&ZEROPAD, it should first be prefixed by any |
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337 * sign or other prefix; otherwise, it should be blank |
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338 * padded before the prefix is emitted. After any |
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339 * left-hand padding and prefixing, emit zeroes |
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340 * required by a decimal [diouxX] precision, then print |
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341 * the string proper, then emit zeroes required by any |
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342 * leftover floating precision; finally, if LADJUST, |
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343 * pad with blanks. |
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344 */ |
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345 |
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346 /* |
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347 * compute actual size, so we know how much to pad |
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348 * fieldsz excludes decimal prec; realsz includes it |
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349 */ |
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350 fieldsz = size + fpprec; |
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351 if (sign) |
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352 fieldsz++; |
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353 if (flags & HEXPREFIX) |
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354 fieldsz += 2; |
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355 realsz = dprec > fieldsz ? dprec : fieldsz; |
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356 |
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357 /* right-adjusting blank padding */ |
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358 if ((flags & (LADJUST|ZEROPAD)) == 0 && width) |
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359 for (n = realsz; n < width; n++) |
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360 PUTC(' '); |
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361 /* prefix */ |
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362 if (sign) |
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363 PUTC(sign); |
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364 if (flags & HEXPREFIX) { |
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365 PUTC('0'); |
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366 PUTC((char)*fmt); |
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367 } |
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368 /* right-adjusting zero padding */ |
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369 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) |
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370 for (n = realsz; n < width; n++) |
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371 PUTC('0'); |
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372 /* leading zeroes from decimal precision */ |
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373 for (n = fieldsz; n < dprec; n++) |
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374 PUTC('0'); |
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375 |
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376 /* the string or number proper */ |
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377 if (fp->_cnt - (n = size) >= 0 && |
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378 (fp->_flag & _IOLBF) == 0) { |
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379 fp->_cnt -= n; |
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380 bcopy(t, (char *)fp->_ptr, n); |
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381 fp->_ptr += n; |
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382 } else |
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383 while (--n >= 0) |
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384 PUTC(*t++); |
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385 /* trailing f.p. zeroes */ |
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386 while (--fpprec >= 0) |
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387 PUTC('0'); |
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388 /* left-adjusting padding (always blank) */ |
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389 if (flags & LADJUST) |
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390 for (n = realsz; n < width; n++) |
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391 PUTC(' '); |
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392 /* finally, adjust cnt */ |
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393 cnt += width > realsz ? width : realsz; |
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394 break; |
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395 case '\0': /* "%?" prints ?, unless ? is NULL */ |
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396 return (cnt); |
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397 default: |
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398 PUTC((char)*fmt); |
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399 cnt++; |
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400 } |
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401 } |
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402 /* NOTREACHED */ |
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403 } |
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404 |
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405 static |
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406 cvt(number, prec, flags, signp, fmtch, startp, endp) |
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407 double number; |
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408 register int prec; |
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409 int flags; |
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410 u_char fmtch; |
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411 char *signp, *startp, *endp; |
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412 { |
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413 register char *p, *t; |
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414 register double fract; |
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415 int dotrim, expcnt, gformat; |
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416 double integer, tmp, modf(); |
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417 char *exponent(), *round(); |
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418 |
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419 dotrim = expcnt = gformat = 0; |
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420 fract = modf(number, &integer); |
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421 |
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422 /* get an extra slot for rounding. */ |
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423 t = ++startp; |
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424 |
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425 /* |
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426 * get integer portion of number; put into the end of the buffer; the |
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427 * .01 is added for modf(356.0 / 10, &integer) returning .59999999... |
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428 */ |
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429 for (p = endp - 1; integer; ++expcnt) { |
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430 tmp = modf(integer / 10, &integer); |
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431 *p-- = tochar((int)((tmp + .01) * 10)); |
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432 } |
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433 switch(fmtch) { |
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434 case 'f': |
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435 /* reverse integer into beginning of buffer */ |
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436 if (expcnt) |
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437 for (; ++p < endp; *t++ = *p); |
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438 else |
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439 *t++ = '0'; |
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440 /* |
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441 * if precision required or alternate flag set, add in a |
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442 * decimal point. |
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443 */ |
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444 if (prec || flags&ALT) |
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445 *t++ = '.'; |
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446 /* if requires more precision and some fraction left */ |
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447 if (fract) { |
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448 if (prec) |
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449 do { |
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parents:
diff
changeset
|
450 fract = modf(fract * 10, &tmp); |
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parents:
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|
451 *t++ = tochar((int)tmp); |
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parents:
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|
452 } while (--prec && fract); |
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parents:
diff
changeset
|
453 if (fract) |
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parents:
diff
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|
454 startp = round(fract, (int *)NULL, startp, |
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parents:
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changeset
|
455 t - 1, (char)0, signp); |
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parents:
diff
changeset
|
456 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 for (; prec--; *t++ = '0'); |
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parents:
diff
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|
458 break; |
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parents:
diff
changeset
|
459 case 'e': |
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parents:
diff
changeset
|
460 case 'E': |
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parents:
diff
changeset
|
461 eformat: if (expcnt) { |
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parents:
diff
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|
462 *t++ = *++p; |
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parents:
diff
changeset
|
463 if (prec || flags&ALT) |
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parents:
diff
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|
464 *t++ = '.'; |
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parents:
diff
changeset
|
465 /* if requires more precision and some integer left */ |
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parents:
diff
changeset
|
466 for (; prec && ++p < endp; --prec) |
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parents:
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|
467 *t++ = *p; |
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parents:
diff
changeset
|
468 /* |
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parents:
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changeset
|
469 * if done precision and more of the integer component, |
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parents:
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|
470 * round using it; adjust fract so we don't re-round |
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parents:
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|
471 * later. |
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parents:
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changeset
|
472 */ |
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parents:
diff
changeset
|
473 if (!prec && ++p < endp) { |
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parents:
diff
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|
474 fract = 0; |
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parents:
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|
475 startp = round((double)0, &expcnt, startp, |
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parents:
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changeset
|
476 t - 1, *p, signp); |
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parents:
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changeset
|
477 } |
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parents:
diff
changeset
|
478 /* adjust expcnt for digit in front of decimal */ |
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parents:
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|
479 --expcnt; |
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parents:
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changeset
|
480 } |
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parents:
diff
changeset
|
481 /* until first fractional digit, decrement exponent */ |
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parents:
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changeset
|
482 else if (fract) { |
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parents:
diff
changeset
|
483 /* adjust expcnt for digit in front of decimal */ |
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parents:
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changeset
|
484 for (expcnt = -1;; --expcnt) { |
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parents:
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changeset
|
485 fract = modf(fract * 10, &tmp); |
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parents:
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changeset
|
486 if (tmp) |
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parents:
diff
changeset
|
487 break; |
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parents:
diff
changeset
|
488 } |
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parents:
diff
changeset
|
489 *t++ = tochar((int)tmp); |
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parents:
diff
changeset
|
490 if (prec || flags&ALT) |
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parents:
diff
changeset
|
491 *t++ = '.'; |
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parents:
diff
changeset
|
492 } |
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parents:
diff
changeset
|
493 else { |
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parents:
diff
changeset
|
494 *t++ = '0'; |
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parents:
diff
changeset
|
495 if (prec || flags&ALT) |
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parents:
diff
changeset
|
496 *t++ = '.'; |
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parents:
diff
changeset
|
497 } |
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parents:
diff
changeset
|
498 /* if requires more precision and some fraction left */ |
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parents:
diff
changeset
|
499 if (fract) { |
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parents:
diff
changeset
|
500 if (prec) |
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parents:
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changeset
|
501 do { |
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parents:
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changeset
|
502 fract = modf(fract * 10, &tmp); |
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parents:
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|
503 *t++ = tochar((int)tmp); |
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parents:
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changeset
|
504 } while (--prec && fract); |
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parents:
diff
changeset
|
505 if (fract) |
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parents:
diff
changeset
|
506 startp = round(fract, &expcnt, startp, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
507 t - 1, (char)0, signp); |
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parents:
diff
changeset
|
508 } |
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parents:
diff
changeset
|
509 /* if requires more precision */ |
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parents:
diff
changeset
|
510 for (; prec--; *t++ = '0'); |
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parents:
diff
changeset
|
511 |
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parents:
diff
changeset
|
512 /* unless alternate flag, trim any g/G format trailing 0's */ |
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parents:
diff
changeset
|
513 if (gformat && !(flags&ALT)) { |
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parents:
diff
changeset
|
514 while (t > startp && *--t == '0'); |
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parents:
diff
changeset
|
515 if (*t == '.') |
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parents:
diff
changeset
|
516 --t; |
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parents:
diff
changeset
|
517 ++t; |
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parents:
diff
changeset
|
518 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
519 t = exponent(t, expcnt, fmtch); |
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parents:
diff
changeset
|
520 break; |
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parents:
diff
changeset
|
521 case 'g': |
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parents:
diff
changeset
|
522 case 'G': |
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parents:
diff
changeset
|
523 /* a precision of 0 is treated as a precision of 1. */ |
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parents:
diff
changeset
|
524 if (!prec) |
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parents:
diff
changeset
|
525 ++prec; |
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parents:
diff
changeset
|
526 /* |
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parents:
diff
changeset
|
527 * ``The style used depends on the value converted; style e |
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parents:
diff
changeset
|
528 * will be used only if the exponent resulting from the |
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parents:
diff
changeset
|
529 * conversion is less than -4 or greater than the precision.'' |
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parents:
diff
changeset
|
530 * -- ANSI X3J11 |
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parents:
diff
changeset
|
531 */ |
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parents:
diff
changeset
|
532 if (expcnt > prec || !expcnt && fract && fract < .0001) { |
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parents:
diff
changeset
|
533 /* |
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parents:
diff
changeset
|
534 * g/G format counts "significant digits, not digits of |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
535 * precision; for the e/E format, this just causes an |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
536 * off-by-one problem, i.e. g/G considers the digit |
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parents:
diff
changeset
|
537 * before the decimal point significant and e/E doesn't |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
538 * count it as precision. |
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parents:
diff
changeset
|
539 */ |
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parents:
diff
changeset
|
540 --prec; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
541 fmtch -= 2; /* G->E, g->e */ |
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parents:
diff
changeset
|
542 gformat = 1; |
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parents:
diff
changeset
|
543 goto eformat; |
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parents:
diff
changeset
|
544 } |
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parents:
diff
changeset
|
545 /* |
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parents:
diff
changeset
|
546 * reverse integer into beginning of buffer, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
547 * note, decrement precision |
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parents:
diff
changeset
|
548 */ |
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parents:
diff
changeset
|
549 if (expcnt) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
550 for (; ++p < endp; *t++ = *p, --prec); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
551 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
552 *t++ = '0'; |
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parents:
diff
changeset
|
553 /* |
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parents:
diff
changeset
|
554 * if precision required or alternate flag set, add in a |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
555 * decimal point. If no digits yet, add in leading 0. |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
556 */ |
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parents:
diff
changeset
|
557 if (prec || flags&ALT) { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
558 dotrim = 1; |
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parents:
diff
changeset
|
559 *t++ = '.'; |
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parents:
diff
changeset
|
560 } |
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parents:
diff
changeset
|
561 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
562 dotrim = 0; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
563 /* if requires more precision and some fraction left */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
564 if (fract) { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
565 if (prec) { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
566 do { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
567 fract = modf(fract * 10, &tmp); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
568 *t++ = tochar((int)tmp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
569 } while(!tmp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
570 while (--prec && fract) { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
571 fract = modf(fract * 10, &tmp); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
572 *t++ = tochar((int)tmp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
573 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
574 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
575 if (fract) |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
576 startp = round(fract, (int *)NULL, startp, |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
577 t - 1, (char)0, signp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
578 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
579 /* alternate format, adds 0's for precision, else trim 0's */ |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
580 if (flags&ALT) |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
581 for (; prec--; *t++ = '0'); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
582 else if (dotrim) { |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
583 while (t > startp && *--t == '0'); |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
584 if (*t != '.') |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
585 ++t; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
586 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
587 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
588 return(t - startp); |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
589 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
590 |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
591 static char * |
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gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
592 round(fract, exp, start, end, ch, signp) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
593 double fract; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
594 int *exp; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
595 register char *start, *end; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
596 char ch, *signp; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
597 { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
598 double tmp; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
599 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
600 if (fract) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
601 (void)modf(fract * 10, &tmp); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
602 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
603 tmp = todigit(ch); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
604 if (tmp > 4) |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
605 for (;; --end) { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
606 if (*end == '.') |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
607 --end; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
608 if (++*end <= '9') |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
609 break; |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
610 *end = '0'; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
611 if (end == start) { |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
612 if (exp) { /* e/E; increment exponent */ |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
613 *end = '1'; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
614 ++*exp; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
615 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
616 else { /* f; add extra digit */ |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
617 *--end = '1'; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
618 --start; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
619 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
620 break; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
621 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
622 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
623 /* ``"%.3f", (double)-0.0004'' gives you a negative 0. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
624 else if (*signp == '-') |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
625 for (;; --end) { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
626 if (*end == '.') |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
627 --end; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
628 if (*end != '0') |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
629 break; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
630 if (end == start) |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
631 *signp = 0; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
632 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
633 return(start); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
634 } |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
635 |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
636 static char * |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
637 exponent(p, exp, fmtch) |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
638 register char *p; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
639 register int exp; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
640 u_char fmtch; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
641 { |
7e45ada9c365
gsm-fw: sprintf overhaul in preparation for adding %f format support
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
642 register char *t; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
643 char expbuf[MAXEXP]; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
644 |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
645 *p++ = fmtch; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
646 if (exp < 0) { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
647 exp = -exp; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
648 *p++ = '-'; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
649 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
650 else |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
651 *p++ = '+'; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
652 t = expbuf + MAXEXP; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
653 if (exp > 9) { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
654 do { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
655 *--t = tochar(exp % 10); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
656 } while ((exp /= 10) > 9); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
657 *--t = tochar(exp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
658 for (; t < expbuf + MAXEXP; *p++ = *t++); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
659 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
660 else { |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
661 *p++ = '0'; |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
662 *p++ = tochar(exp); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
663 } |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
664 return(p); |
7e45ada9c365
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
665 } |