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| Rev | Author | Line No. | Line |
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| 145 | halyavin | 1 | #include "stdio.h" |
| 2 | const char xdigs_lower[16]="0123456789abcdef"; |
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| 3 | const char xdigs_upper[16]="0123456789ABCDEF"; |
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| 4 | int fprintf(FILE* file, const char* format, ...) |
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| 5 | { |
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| 6 | void* arg; |
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| 7 | int ispoint; |
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| 8 | int beforepoint; |
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| 9 | int afterpoint; |
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| 10 | int longflag; |
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| 11 | int contflag; |
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| 12 | int i; |
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| 13 | long long number; |
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| 14 | char buffer[50]; |
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| 15 | char* str; |
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| 16 | arg=&format; |
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| 17 | arg+=sizeof(const char*); |
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| 18 | while (*format!='\0') |
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| 19 | { |
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| 20 | if (*format!='%') |
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| 21 | { |
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| 22 | fputc(*format,file); |
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| 23 | format++; |
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| 24 | continue; |
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| 25 | } |
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| 26 | ispoint=0; |
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| 27 | beforepoint=0; |
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| 28 | afterpoint=0; |
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| 29 | longflag=0; |
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| 30 | contflag=1; |
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| 31 | format++; |
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| 32 | while (*format && contflag) |
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| 33 | { |
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| 34 | switch (*format) |
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| 35 | { |
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| 36 | case '.': |
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| 37 | ispoint=1; |
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| 38 | format++; |
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| 39 | break; |
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| 40 | case '0': |
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| 41 | case '1': |
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| 42 | case '2': |
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| 43 | case '3': |
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| 44 | case '4': |
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| 45 | case '5': |
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| 46 | case '6': |
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| 47 | case '7': |
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| 48 | case '8': |
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| 49 | case '9': |
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| 50 | if (ispoint) |
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| 51 | afterpoint=afterpoint*10+(*format)-'0'; |
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| 52 | else |
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| 53 | beforepoint=beforepoint*10+(*format)-'0'; |
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| 54 | format++; |
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| 55 | break; |
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| 56 | case 'l': |
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| 57 | if (longflag==0) |
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| 58 | longflag=1; |
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| 59 | else |
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| 60 | longflag=2; |
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| 61 | format++; |
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| 62 | break; |
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| 63 | case 'L': |
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| 64 | longflag=2; |
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| 65 | format++; |
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| 66 | break; |
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| 67 | case 'f': |
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| 68 | case 'd': |
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| 69 | case 'x': |
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| 70 | case 'X': |
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| 71 | case 'c': |
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| 72 | case 's': |
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| 73 | case '%': |
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| 74 | contflag=0; |
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| 75 | break; |
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| 76 | default: |
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| 77 | contflag=0; |
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| 78 | } |
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| 79 | } |
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| 80 | if (contflag) |
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| 81 | break; |
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| 82 | switch (*format) |
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| 83 | { |
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| 84 | case '%': |
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| 85 | fpuc('%',file); |
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| 86 | break; |
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| 87 | case 'd': |
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| 88 | if (longflag==2) |
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| 89 | { |
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| 90 | number=*((long long *)arg); |
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| 91 | arg+=sizeof(long long); |
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| 92 | }else |
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| 93 | { |
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| 94 | number=*((int*)arg); |
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| 95 | arg+=sizeof(int); |
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| 96 | } |
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| 97 | if (number<0) |
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| 98 | { |
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| 99 | beforepoint--; |
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| 100 | fputc('-',file); |
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| 101 | number=-number; |
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| 102 | } |
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| 103 | i=0; |
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| 104 | while (number>0) |
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| 105 | { |
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| 106 | buffer[i]='0'+number%10; |
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| 107 | number=number/10; |
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| 108 | i++; |
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| 109 | } |
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| 110 | while (i |
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| 111 | { |
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| 112 | fputc(' ',file); |
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| 113 | beforepoint--; |
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| 114 | } |
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| 115 | while (i>0) |
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| 116 | { |
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| 117 | i--; |
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| 118 | fputc(buffer[i],file); |
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| 119 | } |
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| 120 | break; |
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| 121 | case 'c': |
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| 122 | fputc(*(char*)arg,file); |
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| 123 | arg+=sizeof(char); |
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| 124 | break; |
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| 125 | case 's': |
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| 126 | str=*(char**)arg; |
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| 127 | arg+=sizeof(char*); |
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| 128 | if (beforepoint==0) |
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| 129 | beforepoint--; |
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| 130 | while (*str && beforepoint) |
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| 131 | { |
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| 132 | fputc(*str,file); |
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| 133 | beforepoint--; |
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| 134 | str++; |
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| 135 | } |
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| 136 | break; |
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| 137 | case 'x': |
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| 138 | if (longflag==2) |
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| 139 | { |
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| 140 | number=*((long long *)arg); |
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| 141 | arg+=sizeof(long long); |
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| 142 | }else |
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| 143 | { |
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| 144 | number=*((int*)arg); |
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| 145 | arg+=sizeof(int); |
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| 146 | } |
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| 147 | if (number<0) |
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| 148 | { |
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| 149 | beforepoint--; |
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| 150 | fputc('-',file); |
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| 151 | number=-number; |
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| 152 | } |
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| 153 | i=0; |
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| 154 | while (number>0) |
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| 155 | { |
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| 156 | buffer[i]=xdigs_lower[number & 15]; |
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| 157 | number=number>>4; |
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| 158 | i++; |
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| 159 | } |
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| 160 | while (i |
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| 161 | { |
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| 162 | fputc(' ',file); |
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| 163 | beforepoint--; |
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| 164 | } |
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| 165 | while (i>0) |
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| 166 | { |
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| 167 | i--; |
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| 168 | fputc(buffer[i],file); |
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| 169 | } |
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| 170 | break; |
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| 171 | case 'X': |
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| 172 | if (longflag==2) |
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| 173 | { |
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| 174 | number=*((long long *)arg); |
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| 175 | arg+=sizeof(long long); |
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| 176 | }else |
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| 177 | { |
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| 178 | number=*((int*)arg); |
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| 179 | arg+=sizeof(int); |
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| 180 | } |
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| 181 | if (number<0) |
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| 182 | { |
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| 183 | beforepoint--; |
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| 184 | fputc('-',file); |
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| 185 | number=-number; |
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| 186 | } |
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| 187 | i=0; |
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| 188 | while (number>0) |
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| 189 | { |
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| 190 | buffer[i]=xdigs_upper[number & 15]; |
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| 191 | number=number>>4; |
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| 192 | i++; |
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| 193 | } |
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| 194 | while (i |
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| 195 | { |
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| 196 | fputc(' ',file); |
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| 197 | beforepoint--; |
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| 198 | } |
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| 199 | while (i>0) |
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| 200 | { |
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| 201 | i--; |
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| 202 | fputc(buffer[i],file); |
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| 203 | } |
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| 204 | break; |
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| 205 | case 'f': |
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| 206 | if (longflag==2) |
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| 207 | arg+=10; |
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| 208 | else if (longflag==1) |
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| 209 | arg+=8; |
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| 210 | else |
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| 211 | arg+=4; |
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| 212 | break; |
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| 213 | } |
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| 214 | format++; |
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| 215 | } |
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| 216 | } |