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annotate target-utils/libprintf/doprnt.c @ 114:17b0511b243c

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nuc-fw: continuing lowest-level BSP integration
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Thu, 24 Oct 2013 02:47:14 +0000
parents 40f607bb0a2c
children 84611183c8c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
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1 /* the guts of printf - this implementation came from 4.3BSD-Tahoe */
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2
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3 #include <sys/types.h>
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4 #include <ctype.h>
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5 #include <stdarg.h>
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6
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7 #define PUTC(ch) ((*outfunc)((ch), outfunc_param))
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8
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9 #define ARG() \
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10 _ulong = flags&LONGINT ? va_arg(argp, long) : va_arg(argp, int);
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11
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12 #define BUF 256
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13
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14 #define todigit(c) ((c) - '0')
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15 #define tochar(n) ((n) + '0')
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16
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17 /* have to deal with the negative buffer count kludge */
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18 #define NEGATIVE_COUNT_KLUDGE
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19
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20 #define LONGINT 0x01 /* long integer */
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21 #define LONGDBL 0x02 /* long double; unimplemented */
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22 #define SHORTINT 0x04 /* short integer */
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23 #define ALT 0x08 /* alternate form */
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24 #define LADJUST 0x10 /* left adjustment */
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25 #define ZEROPAD 0x20 /* zero (as opposed to blank) pad */
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26 #define HEXPREFIX 0x40 /* add 0x or 0X prefix */
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27
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28 _doprnt(fmt0, argp, outfunc, outfunc_param)
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29 u_char *fmt0;
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30 va_list argp;
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31 void (*outfunc)();
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32 void *outfunc_param;
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33 {
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34 register u_char *fmt; /* format string */
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35 register int ch; /* character from fmt */
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36 register int cnt; /* return value accumulator */
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37 register int n; /* random handy integer */
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38 register char *t; /* buffer pointer */
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39 u_long _ulong; /* integer arguments %[diouxX] */
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40 int base; /* base for [diouxX] conversion */
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41 int dprec; /* decimal precision in [diouxX] */
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42 int fieldsz; /* field size expanded by sign, etc */
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43 int flags; /* flags as above */
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44 int prec; /* precision from format (%.3d), or -1 */
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45 int realsz; /* field size expanded by decimal precision */
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46 int size; /* size of converted field or string */
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47 int width; /* width from format (%8d), or 0 */
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48 char sign; /* sign prefix (' ', '+', '-', or \0) */
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49 char softsign; /* temporary negative sign for floats */
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50 char *digs; /* digits for [diouxX] conversion */
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51 char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
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52
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53 fmt = fmt0;
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54 digs = "0123456789abcdef";
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55 for (cnt = 0;; ++fmt) {
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56 for (; (ch = *fmt) && ch != '%'; ++cnt, ++fmt)
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57 PUTC(ch);
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58 if (!ch)
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59 return (cnt);
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60
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61 flags = 0; dprec = 0; width = 0;
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62 prec = -1;
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63 sign = '\0';
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64
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65 rflag: switch (*++fmt) {
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66 case ' ':
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67 /*
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68 * ``If the space and + flags both appear, the space
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69 * flag will be ignored.''
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70 * -- ANSI X3J11
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71 */
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72 if (!sign)
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73 sign = ' ';
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74 goto rflag;
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75 case '#':
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76 flags |= ALT;
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77 goto rflag;
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78 case '*':
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79 /*
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80 * ``A negative field width argument is taken as a
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81 * - flag followed by a positive field width.''
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82 * -- ANSI X3J11
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83 * They don't exclude field widths read from args.
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84 */
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85 if ((width = va_arg(argp, int)) >= 0)
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86 goto rflag;
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87 width = -width;
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88 /* FALLTHROUGH */
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89 case '-':
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90 flags |= LADJUST;
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91 goto rflag;
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92 case '+':
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93 sign = '+';
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94 goto rflag;
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95 case '.':
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96 if (*++fmt == '*')
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97 n = va_arg(argp, int);
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98 else {
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99 n = 0;
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100 while (isascii(*fmt) && isdigit(*fmt))
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101 n = 10 * n + todigit(*fmt++);
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102 --fmt;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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103 }
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104 prec = n < 0 ? -1 : n;
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105 goto rflag;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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106 case '0':
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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107 /*
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108 * ``Note that 0 is taken as a flag, not as the
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109 * beginning of a field width.''
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110 * -- ANSI X3J11
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111 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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112 flags |= ZEROPAD;
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113 goto rflag;
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114 case '1': case '2': case '3': case '4':
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115 case '5': case '6': case '7': case '8': case '9':
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116 n = 0;
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117 do {
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118 n = 10 * n + todigit(*fmt);
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119 } while (isascii(*++fmt) && isdigit(*fmt));
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120 width = n;
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121 --fmt;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
122 goto rflag;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
123 case 'L':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
124 flags |= LONGDBL;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
125 goto rflag;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
126 case 'h':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
127 flags |= SHORTINT;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
128 goto rflag;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
129 case 'l':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
130 flags |= LONGINT;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
131 goto rflag;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
132 case 'c':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
133 *(t = buf) = va_arg(argp, int);
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
134 size = 1;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
135 sign = '\0';
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
136 goto pforw;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
137 case 'D':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
138 flags |= LONGINT;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
139 /*FALLTHROUGH*/
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
140 case 'd':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
141 case 'i':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
142 ARG();
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143 if ((long)_ulong < 0) {
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 _ulong = -_ulong;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
145 sign = '-';
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
146 }
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 base = 10;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148 goto number;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
149 case 'n':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 if (flags & LONGINT)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 *va_arg(argp, long *) = cnt;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 else if (flags & SHORTINT)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153 *va_arg(argp, short *) = cnt;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
154 else
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155 *va_arg(argp, int *) = cnt;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 break;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 case 'O':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158 flags |= LONGINT;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 /*FALLTHROUGH*/
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 case 'o':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161 ARG();
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 base = 8;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163 goto nosign;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
164 case 'p':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 /*
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
166 * ``The argument shall be a pointer to void. The
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
167 * value of the pointer is converted to a sequence
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
168 * of printable characters, in an implementation-
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
169 * defined manner.''
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
170 * -- ANSI X3J11
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
171 */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 /* NOSTRICT */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173 _ulong = (u_long)va_arg(argp, void *);
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
174 base = 16;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175 goto nosign;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
176 case 's':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
177 if (!(t = va_arg(argp, char *)))
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
178 t = "(null)";
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
179 if (prec >= 0) {
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
180 /*
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
181 * can't use strlen; can only look for the
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
182 * NUL in the first `prec' characters, and
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
183 * strlen() will go further.
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
184 */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
185 char *p;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
186
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
187 for (p = t, size = 0; size < prec; p++, size++)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
188 if (*p == '\0')
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
189 break;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190 } else
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191 size = strlen(t);
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 sign = '\0';
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193 goto pforw;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
194 case 'U':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
195 flags |= LONGINT;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
196 /*FALLTHROUGH*/
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
197 case 'u':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
198 ARG();
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
199 base = 10;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
200 goto nosign;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
201 case 'X':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
202 digs = "0123456789ABCDEF";
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
203 /* FALLTHROUGH */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
204 case 'x':
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
205 ARG();
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
206 base = 16;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
207 /* leading 0x/X only if non-zero */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
208 if (flags & ALT && _ulong != 0)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
209 flags |= HEXPREFIX;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
210
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
211 /* unsigned conversions */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
212 nosign: sign = '\0';
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
213 /*
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
214 * ``... diouXx conversions ... if a precision is
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
215 * specified, the 0 flag will be ignored.''
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
216 * -- ANSI X3J11
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
217 */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
218 number: if ((dprec = prec) >= 0)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219 flags &= ~ZEROPAD;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
220
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
221 /*
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
222 * ``The result of converting a zero value with an
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
223 * explicit precision of zero is no characters.''
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
224 * -- ANSI X3J11
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
225 */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
226 t = buf + BUF;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
227 if (_ulong != 0 || prec != 0) {
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
228 do {
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
229 *--t = digs[_ulong % base];
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
230 _ulong /= base;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
231 } while (_ulong);
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
232 digs = "0123456789abcdef";
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
233 if (flags & ALT && base == 8 && *t != '0')
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
234 *--t = '0'; /* octal leading 0 */
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
235 }
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
236 size = buf + BUF - t;
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
237
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
238 pforw:
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
239 /*
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
240 * All reasonable formats wind up here. At this point,
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
241 * `t' points to a string which (if not flags&LADJUST)
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
242 * should be padded out to `width' places. If
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
243 * flags&ZEROPAD, it should first be prefixed by any
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
244 * sign or other prefix; otherwise, it should be blank
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
245 * padded before the prefix is emitted. After any
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
246 * left-hand padding and prefixing, emit zeroes
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
247 * required by a decimal [diouxX] precision, then print
45bf8af5f061 libprintf brought in from older PPC/m68k code, but fucking GCC
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
248 * the string proper, then emit zeroes required by any
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249 * leftover floating precision; finally, if LADJUST,
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250 * pad with blanks.
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251 */
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252
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253 /*
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254 * compute actual size, so we know how much to pad
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255 * fieldsz excludes decimal prec; realsz includes it
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256 */
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257 fieldsz = size;
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258 if (sign)
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259 fieldsz++;
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260 if (flags & HEXPREFIX)
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261 fieldsz += 2;
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262 realsz = dprec > fieldsz ? dprec : fieldsz;
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263
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264 /* right-adjusting blank padding */
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265 if ((flags & (LADJUST|ZEROPAD)) == 0 && width)
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266 for (n = realsz; n < width; n++)
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267 PUTC(' ');
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268 /* prefix */
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269 if (sign)
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270 PUTC(sign);
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271 if (flags & HEXPREFIX) {
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272 PUTC('0');
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273 PUTC((char)*fmt);
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274 }
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275 /* right-adjusting zero padding */
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276 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
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277 for (n = realsz; n < width; n++)
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278 PUTC('0');
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279 /* leading zeroes from decimal precision */
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280 for (n = fieldsz; n < dprec; n++)
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281 PUTC('0');
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282
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283 for (n = size; --n >= 0; )
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284 PUTC(*t++);
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285 /* left-adjusting padding (always blank) */
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286 if (flags & LADJUST)
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287 for (n = realsz; n < width; n++)
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288 PUTC(' ');
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289 /* finally, adjust cnt */
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290 cnt += width > realsz ? width : realsz;
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291 break;
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292 case '\0': /* "%?" prints ?, unless ? is NULL */
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293 return (cnt);
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294 default:
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295 PUTC((char)*fmt);
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296 cnt++;
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297 }
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298 }
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299 /* NOTREACHED */
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300 }