| | 1 | /* |
| | 2 | jcode.c: Kanji-code detect routing by Jun Nishii <jun@vinelinux.org> |
| | 3 | modified by Ryoichi INAGAKI <inagaki@vinelinux.org> |
| | 4 | */ |
| | 5 | #include <stdio.h> |
| | 6 | #include <unistd.h> |
| | 7 | #include <signal.h> |
| | 8 | #include <sys/types.h> |
| | 9 | #include <sys/wait.h> |
| | 10 | #include <jcode.h> |
| | 11 | |
| | 12 | typedef unsigned long unichar; |
| | 13 | |
| | 14 | #define F 0 /* character never appears in text */ |
| | 15 | #define T 1 /* character appears in plain ASCII text */ |
| | 16 | #define I 2 /* character appears in ISO-8859 text */ |
| | 17 | #define X 3 /* character appears in non-ISO extended ASCII (Mac, IBM PC) */ |
| | 18 | #define J 4 /* character appears in JIS or plain ASCII */ |
| | 19 | #define S 5 /* character appears in SJIS */ |
| | 20 | #define E 6 /* character appears in EUC */ |
| | 21 | #define O 7 /* character appears in EUC or SJIS */ |
| | 22 | |
| | 23 | #define ESC 27 |
| | 24 | |
| | 25 | static char jp_chars1[256] = { |
| | 26 | F, F, F, F, F, F, F, T, T, T, T, F, T, T, F, F, /* 0x0X */ |
| | 27 | F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */ |
| | 28 | T, J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, /* 0x2X */ |
| | 29 | J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, /* 0x3X */ |
| | 30 | J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, /* 0x4X */ |
| | 31 | J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, /* 0x5X */ |
| | 32 | J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, /* 0x6X */ |
| | 33 | J, J, J, J, J, J, J, J, J, J, J, J, J, J, J, F, /* 0x7X */ |
| | 34 | /* NEL */ |
| | 35 | X, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x8X */ |
| | 36 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x9X */ |
| | 37 | I, E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, /* 0xaX */ |
| | 38 | E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, /* 0xbX */ |
| | 39 | E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, /* 0xcX */ |
| | 40 | E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, /* 0xdX */ |
| | 41 | O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xeX */ |
| | 42 | E, E, E, E, E, E, E, E, E, E, E, E, E, E, E, I /* 0xfX */ |
| | 43 | }; |
| | 44 | |
| | 45 | static char jp_chars2[256] = { |
| | 46 | /* BEL BS HT LF FF CR */ |
| | 47 | F, F, F, F, F, F, F, T, T, T, T, F, T, T, F, F, /* 0x0X */ |
| | 48 | /* ESC */ |
| | 49 | F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */ |
| | 50 | T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x2X */ |
| | 51 | T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x3X */ |
| | 52 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x4X */ |
| | 53 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x5X */ |
| | 54 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x6X */ |
| | 55 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, F, /* 0x7X */ |
| | 56 | /* NEL */ |
| | 57 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x8X */ |
| | 58 | S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, /* 0x9X */ |
| | 59 | S, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xaX */ |
| | 60 | O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xbX */ |
| | 61 | O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xcX */ |
| | 62 | O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xdX */ |
| | 63 | O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, O, /* 0xeX */ |
| | 64 | O, O, O, O, O, O, O, O, O, O, O, O, O, E, E, I /* 0xfX */ |
| | 65 | }; |
| | 66 | |
| | 67 | |
| | 68 | int |
| | 69 | check_asc_jis(buf, nbytes, ubuf, ulen) |
| | 70 | const unsigned char *buf; |
| | 71 | size_t nbytes; |
| | 72 | unichar *ubuf; |
| | 73 | size_t *ulen; |
| | 74 | { |
| | 75 | size_t i; |
| | 76 | int jflag; |
| | 77 | |
| | 78 | *ulen = 0; jflag=0; |
| | 79 | |
| | 80 | for (i = 0; i < nbytes; i++) { |
| | 81 | int t = jp_chars1[buf[i]]; |
| | 82 | |
| | 83 | if (t != T && t != J ) |
| | 84 | return 0; |
| | 85 | |
| | 86 | if (buf[i] == ESC && i+2<nbytes) { |
| | 87 | if ((buf[i+1]=='$' && buf[i+2]=='B')|| |
| | 88 | (buf[i+1]=='$' && buf[i+2]=='@')) jflag=1; |
| | 89 | } |
| | 90 | |
| | 91 | ubuf[(*ulen)++] = buf[i]; |
| | 92 | } |
| | 93 | |
| | 94 | if (jflag==1) return JIS; |
| | 95 | else return ASCII; |
| | 96 | } |
| | 97 | |
| | 98 | int |
| | 99 | check_sjis(buf, nbytes, ubuf, ulen) |
| | 100 | const unsigned char *buf; |
| | 101 | size_t nbytes; |
| | 102 | unichar *ubuf; |
| | 103 | size_t *ulen; |
| | 104 | { |
| | 105 | size_t i; |
| | 106 | int jflag; |
| | 107 | |
| | 108 | *ulen = 0; |
| | 109 | jflag = ASCII; |
| | 110 | for (i = 0; i < nbytes; i++) { |
| | 111 | int t = jp_chars1[buf[i]]; |
| | 112 | |
| | 113 | if (t != T && t != J && t != S && t!= O) |
| | 114 | return 0; |
| | 115 | |
| | 116 | if (t == S && i<nbytes-1){ |
| | 117 | ubuf[(*ulen)++] = buf[i]; |
| | 118 | ++i; |
| | 119 | t=jp_chars2[buf[i]]; |
| | 120 | if(t != S && t != O ) return 0; |
| | 121 | jflag=SJIS; |
| | 122 | } else if (t == O && i<nbytes-1){ |
| | 123 | ubuf[(*ulen)++] = buf[i]; |
| | 124 | ++i; |
| | 125 | t=jp_chars2[buf[i]]; |
| | 126 | if( t == S ){ jflag=SJIS; } |
| | 127 | else if( t == O ){ if(jflag==ASCII) jflag=EUCORSJIS; } |
| | 128 | else return 0; |
| | 129 | } |
| | 130 | |
| | 131 | ubuf[(*ulen)++] = buf[i]; |
| | 132 | } |
| | 133 | #ifdef Z |
| | 134 | if (jflag==SJIS) {ckfputs("SJIS text", stdout); return SJIS;} |
| | 135 | if (jflag==EUCORSJIS) {ckfputs("EUCorSJIS", stdout); return EUCORSJIS;} |
| | 136 | #else |
| | 137 | if (jflag==SJIS) {return SJIS;} |
| | 138 | if (jflag==EUCORSJIS) {return EUCORSJIS;} |
| | 139 | #endif |
| | 140 | } |
| | 141 | |
| | 142 | int |
| | 143 | check_euc(buf, nbytes, ubuf, ulen) |
| | 144 | const unsigned char *buf; |
| | 145 | size_t nbytes; |
| | 146 | unichar *ubuf; |
| | 147 | size_t *ulen; |
| | 148 | { |
| | 149 | size_t i; |
| | 150 | int jflag; |
| | 151 | |
| | 152 | *ulen = 0; |
| | 153 | jflag = ASCII; |
| | 154 | |
| | 155 | for (i = 0; i < nbytes; i++) { |
| | 156 | int t = jp_chars1[buf[i]]; |
| | 157 | |
| | 158 | if (t != T && t != J && t != E && t!= O) |
| | 159 | return 0; |
| | 160 | |
| | 161 | if (t == E && i<nbytes-1){ |
| | 162 | ubuf[(*ulen)++] = buf[i]; |
| | 163 | ++i; |
| | 164 | t= jp_chars2[buf[i]]; |
| | 165 | if( t != E && t != O) return 0; |
| | 166 | jflag=EUC; |
| | 167 | } else if (t == O && i<nbytes-1){ |
| | 168 | ubuf[(*ulen)++] = buf[i]; |
| | 169 | ++i; |
| | 170 | t=jp_chars2[buf[i]]; |
| | 171 | if( t == E ){ jflag=EUC; } |
| | 172 | else if( t == O ){ if(jflag==ASCII) jflag=EUCORSJIS; } |
| | 173 | else return 0; |
| | 174 | } |
| | 175 | |
| | 176 | ubuf[(*ulen)++] = buf[i]; |
| | 177 | } |
| | 178 | #ifdef Z |
| | 179 | if (jflag==EUC) {ckfputs("EUC text", stdout); return EUC;} |
| | 180 | if (jflag==EUCORSJIS) {ckfputs("EUCorSJIS", stdout); return EUCORSJIS;} |
| | 181 | #else |
| | 182 | if (jflag==EUC) { return EUC;} |
| | 183 | if (jflag==EUCORSJIS) {return EUCORSJIS;} |
| | 184 | #endif |
| | 185 | } |
| | 186 | |
| | 187 | int |
| | 188 | detect_kcode(buf, nbytes, ubuf, ulen) |
| | 189 | const unsigned char *buf; |
| | 190 | size_t nbytes; |
| | 191 | unichar *ubuf; |
| | 192 | size_t *ulen; |
| | 193 | { |
| | 194 | int ret; |
| | 195 | ret=check_asc_jis(buf, nbytes, ubuf, ulen); |
| | 196 | if(ret==ASCII) return ASCII; |
| | 197 | if(ret==JIS) return JIS; |
| | 198 | |
| | 199 | ret=check_sjis(buf, nbytes, ubuf, ulen); |
| | 200 | if(ret==SJIS) return SJIS; |
| | 201 | if(ret==EUCORSJIS) return EUCORSJIS; |
| | 202 | ret=check_euc(buf, nbytes, ubuf, ulen); |
| | 203 | if(ret==EUC) return EUC; |
| | 204 | if(ret==EUCORSJIS) return EUCORSJIS; |
| | 205 | } |