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Up to [CSRG BSD Unix] / 40BSD / cmd / struct|
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1.1 ! root 1: %{ ! 2: #include "y.tab.h" ! 3: #include "b.h" ! 4: #undef input ! 5: #define input() ninput() ! 6: #undef unput ! 7: #define unput(c) nunput(c) ! 8: extern int yylval; ! 9: #define xxbpmax 1700 ! 10: char xxbuf[xxbpmax + 2]; ! 11: int xxbp = -1; ! 12: #define xxunmax 200 ! 13: char xxunbuf[xxunmax + 2]; ! 14: int xxunbp = -1; ! 15: ! 16: ! 17: int blflag; ! 18: %} ! 19: ! 20: D [0-9] ! 21: A [0-9a-z] ! 22: L [a-z] ! 23: SP [^0-9a-z] ! 24: ! 25: %% ! 26: ! 27: %{ ! 28: char *xxtbuff; ! 29: int xxj, xxn, xxk; ! 30: char *xxp; ! 31: %} ! 32: [=/,(]{D}+[h] { ! 33: blflag = 1; ! 34: sscanf(&yytext[1],"%d",&xxn); ! 35: xxtbuff = malloc(2*xxn+3); ! 36: for (xxj = xxk = 1; xxj <= xxn; ++xxj) ! 37: { ! 38: xxtbuff[xxk] = ninput(); ! 39: if (xxtbuff[xxk] == '"') ! 40: xxtbuff[++xxk] = '"'; ! 41: ++xxk; ! 42: } ! 43: xxtbuff[0] = xxtbuff[xxk++] = '"'; ! 44: xxtbuff[xxk] = '\0'; ! 45: putback(xxtbuff); ! 46: free(xxtbuff); ! 47: ! 48: backup(yytext[0]); ! 49: blflag = 0; ! 50: xxbp = -1; ! 51: } ! 52: IF {fixval(); xxbp = -1; return(xxif);} ! 53: ELSE {fixval(); xxbp = -1; return(xxelse);} ! 54: REPEAT {fixval(); xxbp = -1; return(xxrept); } ! 55: WHILE {fixval(); xxbp = -1; return(xxwhile); } ! 56: UNTIL { fixval(); xxbp = -1; return(xxuntil); } ! 57: DO {fixval(); xxbp = -1; return(xxdo); } ! 58: SWITCH {fixval(); xxbp = -1; return(xxswitch); } ! 59: CASE {fixval(); xxbp = -1; return(xxcase); } ! 60: DEFAULT {fixval(); xxbp = -1; return(xxdefault); } ! 61: END {fixval(); xxbp = -1; return(xxend); } ! 62: ! 63: ".true." | ! 64: ".false." | ! 65: ! 66: {L}{A}* {fixval(); xxbp = -1; return(xxident); } ! 67: ~{D}+ {xxbuf[0] = ' '; fixval(); xxbp = -1; return(xxnum); } ! 68: {D}+/"."(ge|gt|le|lt|eq|ne|not|or|and)"." | ! 69: {D}+\.? | ! 70: {D}+\.?[de][+-]?{D}+ | ! 71: {D}*\.{D}+[de][+-]?{D}+ | ! 72: {D}*\.{D}+ {fixval(); xxbp = -1; return(xxnum); } ! 73: ! 74: ".gt." { putback(">"); xxbp = -1; } ! 75: ".ge." { putback(">=");xxbp = -1; } ! 76: ".lt." { putback("<"); xxbp = -1; } ! 77: ".le." { putback("<="); xxbp = -1; } ! 78: ".eq." { putback("=="); xxbp = -1; } ! 79: ".ne." { putback("!="); xxbp = -1; } ! 80: ".not." { putback("!"); xxbp = -1; } ! 81: ".or." { putback("||"); xxbp = -1; } ! 82: ".and." { putback("&&"); xxbp = -1; } ! 83: ">=" {fixval(); xxbp = -1; return(xxge); } ! 84: "<=" {fixval(); xxbp = -1; return(xxle); } ! 85: == {fixval(); xxbp = -1; return(xxeq); } ! 86: != {fixval(); xxbp = -1; return(xxne); } ! 87: "||" {fixval(); xxbp = -1; return('|'); } ! 88: "&&" {fixval(); xxbp = -1; return('&'); } ! 89: "**" {fixval(); xxbp = -1; return('^'); } ! 90: ! 91: #.* {fixval(); xxbp = -1; return(xxcom); } ! 92: \"([^"]|\"\")*\" {fixval(); xxbp = -1; return(xxstring); } ! 93: '([^']|'')*' { ! 94: fixval(); ! 95: xxp = yylval; ! 96: xxn = slength(xxp); ! 97: xxtbuff = malloc(2*xxn+1); ! 98: xxtbuff[0] = '"'; ! 99: for (xxj = xxk = 1; xxj < xxn-1; ++xxj) ! 100: { ! 101: if (xxp[xxj] == '\'' && xxp[++xxj] == '\'') ! 102: xxtbuff[xxk++] = '\''; ! 103: else if (xxp[xxj] == '"') ! 104: { ! 105: xxtbuff[xxk++] = '"'; ! 106: xxtbuff[xxk++] = '"'; ! 107: } ! 108: else ! 109: xxtbuff[xxk++] = xxp[xxj]; ! 110: } ! 111: xxtbuff[xxk++] = '"'; ! 112: xxtbuff[xxk] = '\0'; ! 113: free(xxp); ! 114: yylval = xxtbuff; ! 115: xxbp = -1; ! 116: return(xxstring); ! 117: } ! 118: ! 119: ^\n xxbp = -1; ! 120: \n {xxbp = -1; if (newflag) {fixval(); return('\n'); } } ! 121: {SP} {fixval(); xxbp = -1; return(yytext[0]); } ! 122: ! 123: %% ! 124: ! 125: rdchar() ! 126: { ! 127: int c; ! 128: if (xxunbp >= 0) ! 129: return(xxunbuf[xxunbp--]); ! 130: c = getchar(); ! 131: if (c == EOF) return('\0'); ! 132: else return((char)c); ! 133: } ! 134: ! 135: backup(c) ! 136: char c; ! 137: { ! 138: if (++xxunbp > xxunmax) ! 139: { ! 140: xxunbuf[xxunmax + 1] = '\0'; ! 141: error("RATFOR beautifying; input backed up too far during lex:\n", ! 142: xxunbuf,"\n"); ! 143: } ! 144: xxunbuf[xxunbp] = c; ! 145: } ! 146: ! 147: nunput(c) ! 148: char c; ! 149: { ! 150: backup(c); ! 151: if (xxbp < 0) return; ! 152: if (c != xxbuf[xxbp]) ! 153: { ! 154: xxbuf[xxbp + 1] = '\0'; ! 155: error("RATFOR beautifying; lex call of nunput with wrong char:\n", ! 156: xxbuf,"\n"); ! 157: } ! 158: for ( --xxbp; xxbp >= 0 && (xxbuf[xxbp] == ' ' || xxbuf[xxbp] == '\t'); --xxbp) ! 159: backup(xxbuf[xxbp]); ! 160: xxbuf[xxbp+1] = '\0'; ! 161: } ! 162: ! 163: ninput() ! 164: { ! 165: char c,d; ! 166: if (blflag) c = rdchar(); ! 167: else ! 168: while ( (c = rdchar()) == ' ' || c == '\t') ! 169: addbuf(c); ! 170: if (c != '\n') ! 171: return(addbuf(c)); ! 172: while ( (d = rdchar()) == ' ' || d == '\t'); ! 173: if (d == '&') ! 174: return(ninput()); ! 175: backup(d); ! 176: return(addbuf('\n')); ! 177: } ! 178: ! 179: addbuf(c) ! 180: char c; ! 181: { ! 182: if (++xxbp > xxbpmax) ! 183: { ! 184: xxbuf[xxbpmax +1] = '\0'; ! 185: error("RATFOR beautifying; buffer xxbuf too small for token beginning:\n", ! 186: xxbuf,"\n"); ! 187: } ! 188: xxbuf[xxbp] = c; ! 189: xxbuf[xxbp + 1] = '\0'; ! 190: return(c); ! 191: } ! 192: ! 193: ! 194: fixval() ! 195: { ! 196: int i, j, k; ! 197: for (j = 0; xxbuf[j] == ' ' || xxbuf[j] == '\t'; ++j); ! 198: for (k = j; xxbuf[k] != '\0'; ++k); ! 199: for (--k; k > j && xxbuf[k] == ' ' || xxbuf[k] == '\t'; --k); ! 200: xxbuf[k+1] = '\0'; ! 201: i = slength(&xxbuf[j]) + 1; ! 202: yylval = malloc(i); ! 203: str_copy(&xxbuf[j],yylval,i); ! 204: } ! 205: ! 206: ! 207: ! 208: putback(str) ! 209: char *str; ! 210: { ! 211: int i; ! 212: for (i = 0; str[i] != '\0'; ++i); ! 213: for (--i; i >= 0; --i) ! 214: backup(str[i]); ! 215: } ! 216:
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