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-rw-r--r--soltools/cpp/_lex.c688
1 files changed, 688 insertions, 0 deletions
diff --git a/soltools/cpp/_lex.c b/soltools/cpp/_lex.c
new file mode 100644
index 000000000000..2ff188ff2264
--- /dev/null
+++ b/soltools/cpp/_lex.c
@@ -0,0 +1,688 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__))
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+#include "cpp.h"
+/*
+ * lexical FSM encoding
+ * when in state state, and one of the characters
+ * in ch arrives, enter nextstate.
+ * States >= S_SELF are either final, or at least require special action.
+ * In 'fsm' there is a line for each state X charset X nextstate.
+ * List chars that overwrite previous entries later (e.g. C_ALPH
+ * can be overridden by '_' by a later entry; and C_XX is the
+ * the universal set, and should always be first.
+ * States above S_SELF are represented in the big table as negative values.
+ * S_SELF and S_SELFB encode the resulting token type in the upper bits.
+ * These actions differ in that S_SELF doesn't have a lookahead char,
+ * S_SELFB does.
+ *
+ * The encoding is blown out into a big table for time-efficiency.
+ * Entries have
+ * nextstate: 6 bits; ?\ marker: 1 bit; tokentype: 9 bits.
+ */
+
+#define MAXSTATE 32
+#define ACT(tok,act) ((tok<<7)+act)
+#define QBSBIT 0100
+#define GETACT(st) ((st>>7)&0x1ff)
+
+/* character classes */
+#define C_WS 1
+#define C_ALPH 2
+#define C_NUM 3
+#define C_EOF 4
+#define C_XX 5
+
+enum state
+{
+ START = 0, NUM1, NUM2, NUM3, ID1, ST1, ST2, ST3, COM1, COM2, COM3, COM4,
+ CC1, CC2, WS1, PLUS1, MINUS1, STAR1, SLASH1, PCT1, SHARP1,
+ CIRC1, GT1, GT2, LT1, LT2, OR1, AND1, ASG1, NOT1, DOTS1,
+ S_SELF = MAXSTATE, S_SELFB, S_EOF, S_NL, S_EOFSTR,
+ S_STNL, S_COMNL, S_EOFCOM, S_COMMENT, S_EOB, S_WS, S_NAME
+};
+
+int tottok;
+int tokkind[256];
+struct fsm
+{
+ int state; /* if in this state */
+ uchar ch[4]; /* and see one of these characters */
+ int nextstate; /* enter this state if +ve */
+};
+
+ /*const*/ struct fsm fsm[] = {
+ /* start state */
+ {START, {C_XX}, ACT(UNCLASS, S_SELF)},
+ {START, {' ', '\t', '\v'}, WS1},
+ {START, {C_NUM}, NUM1},
+ {START, {'.'}, NUM3},
+ {START, {C_ALPH}, ID1},
+ {START, {'L'}, ST1},
+ {START, {'"'}, ST2},
+ {START, {'\''}, CC1},
+ {START, {'/'}, COM1},
+ {START, {EOFC}, S_EOF},
+ {START, {'\n'}, S_NL},
+ {START, {'-'}, MINUS1},
+ {START, {'+'}, PLUS1},
+ {START, {'<'}, LT1},
+ {START, {'>'}, GT1},
+ {START, {'='}, ASG1},
+ {START, {'!'}, NOT1},
+ {START, {'&'}, AND1},
+ {START, {'|'}, OR1},
+ {START, {'#'}, SHARP1},
+ {START, {'%'}, PCT1},
+ {START, {'['}, ACT(SBRA, S_SELF)},
+ {START, {']'}, ACT(SKET, S_SELF)},
+ {START, {'('}, ACT(LP, S_SELF)},
+ {START, {')'}, ACT(RP, S_SELF)},
+ {START, {'*'}, STAR1},
+ {START, {','}, ACT(COMMA, S_SELF)},
+ {START, {'?'}, ACT(QUEST, S_SELF)},
+ {START, {':'}, ACT(COLON, S_SELF)},
+ {START, {';'}, ACT(SEMIC, S_SELF)},
+ {START, {'{'}, ACT(CBRA, S_SELF)},
+ {START, {'}'}, ACT(CKET, S_SELF)},
+ {START, {'~'}, ACT(TILDE, S_SELF)},
+ {START, {'^'}, CIRC1},
+
+ /* saw a digit */
+ {NUM1, {C_XX}, ACT(NUMBER, S_SELFB)},
+ {NUM1, {C_NUM, C_ALPH, '.'}, NUM1},
+ {NUM1, {'E', 'e'}, NUM2},
+ {NUM1, {'_'}, ACT(NUMBER, S_SELFB)},
+
+ /* saw possible start of exponent, digits-e */
+ {NUM2, {C_XX}, ACT(NUMBER, S_SELFB)},
+ {NUM2, {'+', '-'}, NUM1},
+ {NUM2, {C_NUM, C_ALPH}, NUM1},
+ {NUM2, {'_'}, ACT(NUMBER, S_SELFB)},
+
+ /* saw a '.', which could be a number or an operator */
+ {NUM3, {C_XX}, ACT(DOT, S_SELFB)},
+ {NUM3, {'.'}, DOTS1},
+ {NUM3, {C_NUM}, NUM1},
+
+ {DOTS1, {C_XX}, ACT(UNCLASS, S_SELFB)},
+ {DOTS1, {C_NUM}, NUM1},
+ {DOTS1, {'.'}, ACT(ELLIPS, S_SELF)},
+
+ /* saw a letter or _ */
+ {ID1, {C_XX}, ACT(NAME, S_NAME)},
+ {ID1, {C_ALPH, C_NUM}, ID1},
+
+ /* saw L (start of wide string?) */
+ {ST1, {C_XX}, ACT(NAME, S_NAME)},
+ {ST1, {C_ALPH, C_NUM}, ID1},
+ {ST1, {'"'}, ST2},
+ {ST1, {'\''}, CC1},
+
+ /* saw " beginning string */
+ {ST2, {C_XX}, ST2},
+ {ST2, {'"'}, ACT(STRING, S_SELF)},
+ {ST2, {'\\'}, ST3},
+ {ST2, {'\n'}, S_STNL},
+ {ST2, {EOFC}, S_EOFSTR},
+
+ /* saw \ in string */
+ {ST3, {C_XX}, ST2},
+ {ST3, {'\n'}, S_STNL},
+ {ST3, {EOFC}, S_EOFSTR},
+
+ /* saw ' beginning character const */
+ {CC1, {C_XX}, CC1},
+ {CC1, {'\''}, ACT(CCON, S_SELF)},
+ {CC1, {'\\'}, CC2},
+ {CC1, {'\n'}, S_STNL},
+ {CC1, {EOFC}, S_EOFSTR},
+
+ /* saw \ in ccon */
+ {CC2, {C_XX}, CC1},
+ {CC2, {'\n'}, S_STNL},
+ {CC2, {EOFC}, S_EOFSTR},
+
+ /* saw /, perhaps start of comment */
+ {COM1, {C_XX}, ACT(SLASH, S_SELFB)},
+ {COM1, {'='}, ACT(ASSLASH, S_SELF)},
+ {COM1, {'*'}, COM2},
+ {COM1, {'/'}, COM4},
+
+ /* saw / followed by *, start of comment */
+ {COM2, {C_XX}, COM2},
+ {COM2, {'\n'}, S_COMNL},
+ {COM2, {'*'}, COM3},
+ {COM2, {EOFC}, S_EOFCOM},
+
+ /* saw the * possibly ending a comment */
+ {COM3, {C_XX}, COM2},
+ {COM3, {'\n'}, S_COMNL},
+ {COM3, {'*'}, COM3},
+ {COM3, {'/'}, S_COMMENT},
+
+ /* // comment */
+ {COM4, {C_XX}, COM4},
+ {COM4, {'\n'}, S_NL},
+ {COM4, {EOFC}, S_EOFCOM},
+
+ /* saw white space, eat it up */
+ {WS1, {C_XX}, S_WS},
+ {WS1, {'\t', '\v', ' '}, WS1},
+
+ /* saw -, check --, -=, -> */
+ {MINUS1, {C_XX}, ACT(MINUS, S_SELFB)},
+ {MINUS1, {'-'}, ACT(MMINUS, S_SELF)},
+ {MINUS1, {'='}, ACT(ASMINUS, S_SELF)},
+ {MINUS1, {'>'}, ACT(ARROW, S_SELF)},
+
+ /* saw +, check ++, += */
+ {PLUS1, {C_XX}, ACT(PLUS, S_SELFB)},
+ {PLUS1, {'+'}, ACT(PPLUS, S_SELF)},
+ {PLUS1, {'='}, ACT(ASPLUS, S_SELF)},
+
+ /* saw <, check <<, <<=, <= */
+ {LT1, {C_XX}, ACT(LT, S_SELFB)},
+ {LT1, {'<'}, LT2},
+ {LT1, {'='}, ACT(LEQ, S_SELF)},
+ {LT2, {C_XX}, ACT(LSH, S_SELFB)},
+ {LT2, {'='}, ACT(ASLSH, S_SELF)},
+
+ /* saw >, check >>, >>=, >= */
+ {GT1, {C_XX}, ACT(GT, S_SELFB)},
+ {GT1, {'>'}, GT2},
+ {GT1, {'='}, ACT(GEQ, S_SELF)},
+ {GT2, {C_XX}, ACT(RSH, S_SELFB)},
+ {GT2, {'='}, ACT(ASRSH, S_SELF)},
+
+ /* = */
+ {ASG1, {C_XX}, ACT(ASGN, S_SELFB)},
+ {ASG1, {'='}, ACT(EQ, S_SELF)},
+
+ /* ! */
+ {NOT1, {C_XX}, ACT(NOT, S_SELFB)},
+ {NOT1, {'='}, ACT(NEQ, S_SELF)},
+
+ /* & */
+ {AND1, {C_XX}, ACT(AND, S_SELFB)},
+ {AND1, {'&'}, ACT(LAND, S_SELF)},
+ {AND1, {'='}, ACT(ASAND, S_SELF)},
+
+ /* | */
+ {OR1, {C_XX}, ACT(OR, S_SELFB)},
+ {OR1, {'|'}, ACT(LOR, S_SELF)},
+ {OR1, {'='}, ACT(ASOR, S_SELF)},
+
+ /* # */
+ {SHARP1, {C_XX}, ACT(SHARP, S_SELFB)},
+ {SHARP1, {'#'}, ACT(DSHARP, S_SELF)},
+
+ /* % */
+ {PCT1, {C_XX}, ACT(PCT, S_SELFB)},
+ {PCT1, {'='}, ACT(ASPCT, S_SELF)},
+
+ /* * */
+ {STAR1, {C_XX}, ACT(STAR, S_SELFB)},
+ {STAR1, {'='}, ACT(ASSTAR, S_SELF)},
+
+ /* ^ */
+ {CIRC1, {C_XX}, ACT(CIRC, S_SELFB)},
+ {CIRC1, {'='}, ACT(ASCIRC, S_SELF)},
+
+ {-1, "", 0}
+};
+
+/* first index is char, second is state */
+/* increase #states to power of 2 to encourage use of shift */
+short bigfsm[256][MAXSTATE];
+
+void
+ expandlex(void)
+{
+ /* const */ struct fsm *fp;
+ int i, j, nstate;
+
+ for (fp = fsm; fp->state >= 0; fp++)
+ {
+ for (i = 0; fp->ch[i]; i++)
+ {
+ nstate = fp->nextstate;
+ if (nstate >= S_SELF)
+ nstate = ~nstate;
+ switch (fp->ch[i])
+ {
+
+ case C_XX: /* random characters */
+ for (j = 0; j < 256; j++)
+ bigfsm[j][fp->state] = (short) nstate;
+ continue;
+ case C_ALPH:
+ for (j = 0; j <= 256; j++)
+#ifdef S390
+ if( isalpha( j ) || (j == '_') )
+#else
+ if (('a' <= j && j <= 'z') || ('A' <= j && j <= 'Z')
+ || j == '_')
+#endif
+ bigfsm[j][fp->state] = (short) nstate;
+ continue;
+ case C_NUM:
+ for (j = '0'; j <= '9'; j++)
+ bigfsm[j][fp->state] = (short) nstate;
+ continue;
+ default:
+ bigfsm[fp->ch[i]][fp->state] = (short) nstate;
+ }
+ }
+ }
+
+ /*
+ * install special cases for ? (trigraphs), \ (splicing), runes, and
+ * EOB
+ */
+ for (i = 0; i < MAXSTATE; i++)
+ {
+ for (j = 0; j < 0xFF; j++)
+ if (j == '?' || j == '\\' || j == '\n' || j == '\r')
+ {
+ if (bigfsm[j][i] > 0)
+ bigfsm[j][i] = ~bigfsm[j][i];
+ bigfsm[j][i] &= ~QBSBIT;
+ }
+ bigfsm[EOB][i] = ~S_EOB;
+ if (bigfsm[EOFC][i] >= 0)
+ bigfsm[EOFC][i] = ~S_EOF;
+ }
+}
+
+void
+ fixlex(void)
+{
+ /* do C++ comments? */
+ if ((Cplusplus == 0) || (Cflag != 0))
+ bigfsm['/'][COM1] = bigfsm['x'][COM1];
+}
+
+/*
+ * fill in a row of tokens from input, terminated by NL or END
+ * First token is put at trp->lp.
+ * Reset is non-zero when the input buffer can be "rewound."
+ * The value is a flag indicating that possible macros have
+ * been seen in the row.
+ */
+int
+ gettokens(Tokenrow * trp, int reset)
+{
+ register int c, state, oldstate;
+ register uchar *ip;
+ register Token *tp, *maxp;
+ int runelen;
+ Source *s = cursource;
+ int nmac = 0;
+
+ tp = trp->lp;
+ ip = s->inp;
+ if (reset)
+ {
+ s->lineinc = 0;
+ if (ip >= s->inl)
+ { /* nothing in buffer */
+ s->inl = s->inb;
+ fillbuf(s);
+ ip = s->inp = s->inb;
+ }
+ else
+ if (ip >= s->inb + (3 * INS / 4))
+ {
+ memmove(s->inb, ip, 4 + s->inl - ip);
+ s->inl = s->inb + (s->inl - ip);
+ ip = s->inp = s->inb;
+ }
+ }
+ maxp = &trp->bp[trp->max];
+ runelen = 1;
+ for (;;)
+ {
+continue2:
+ if (tp >= maxp)
+ {
+ trp->lp = tp;
+ tp = growtokenrow(trp);
+ maxp = &trp->bp[trp->max];
+ }
+ tp->type = UNCLASS;
+ tp->t = ip;
+ tp->wslen = 0;
+ tp->flag = 0;
+ state = START;
+ for (;;)
+ {
+ oldstate = state;
+
+ c = *ip;
+
+ if ((state = bigfsm[c][state]) >= 0)
+ {
+ ip += runelen;
+ runelen = 1;
+ continue;
+ }
+ state = ~state;
+ reswitch:
+ switch (state & 0177)
+ {
+ case S_SELF:
+ ip += runelen;
+ runelen = 1;
+ case S_SELFB:
+ tp->type = (unsigned char) GETACT(state);
+ tp->len = ip - tp->t;
+ tp++;
+ goto continue2;
+
+ case S_NAME: /* like S_SELFB but with nmac check */
+ tp->type = NAME;
+ tp->len = ip - tp->t;
+ nmac |= quicklook(tp->t[0], tp->len > 1 ? tp->t[1] : 0);
+ tp++;
+ goto continue2;
+
+ case S_WS:
+ tp->wslen = ip - tp->t;
+ tp->t = ip;
+ state = START;
+ continue;
+
+ default:
+ if ((state & QBSBIT) == 0)
+ {
+ ip += runelen;
+ runelen = 1;
+ continue;
+ }
+ state &= ~QBSBIT;
+ s->inp = ip;
+
+ if (c == '\n')
+ {
+ while (s->inp + 1 >= s->inl && fillbuf(s) != EOF);
+
+ if (s->inp[1] == '\r')
+ {
+ memmove(s->inp + 1, s->inp + 2, s->inl - s->inp + 2);
+ s->inl -= 1;
+ }
+
+ goto reswitch;
+ }
+
+ if (c == '\r')
+ {
+ while (s->inp + 1 >= s->inl && fillbuf(s) != EOF);
+
+ if (s->inp[1] == '\n')
+ {
+ memmove(s->inp, s->inp + 1, s->inl - s->inp + 1);
+ s->inl -= 1;
+ }
+ else
+ *s->inp = '\n';
+
+ state = oldstate;
+ continue;
+ }
+
+ if (c == '?')
+ { /* check trigraph */
+ if (trigraph(s))
+ {
+ state = oldstate;
+ continue;
+ }
+ goto reswitch;
+ }
+ if (c == '\\')
+ { /* line-folding */
+ if (foldline(s))
+ {
+ s->lineinc++;
+ state = oldstate;
+ continue;
+ }
+ goto reswitch;
+ }
+ error(WARNING, "Lexical botch in cpp");
+ ip += runelen;
+ runelen = 1;
+ continue;
+
+ case S_EOB:
+ s->inp = ip;
+ fillbuf(cursource);
+ state = oldstate;
+ continue;
+
+ case S_EOF:
+ tp->type = END;
+ tp->len = 0;
+ s->inp = ip;
+ if (tp != trp->bp && (tp - 1)->type != NL && cursource->fd != -1)
+ error(WARNING, "No newline at end of file");
+ trp->lp = tp + 1;
+ return nmac;
+
+ case S_STNL:
+ error(ERROR, "Unterminated string or char const");
+ case S_NL:
+ tp->t = ip;
+ tp->type = NL;
+ tp->len = 1;
+ tp->wslen = 0;
+ s->lineinc++;
+ s->inp = ip + 1;
+ trp->lp = tp + 1;
+ return nmac;
+
+ case S_EOFSTR:
+ error(FATAL, "EOF in string or char constant");
+ break;
+
+ case S_COMNL:
+ s->lineinc++;
+ state = COM2;
+ ip += runelen;
+ runelen = 1;
+ continue;
+
+ case S_EOFCOM:
+ error(WARNING, "EOF inside comment");
+ --ip;
+ case S_COMMENT:
+ if (!Cflag)
+ {
+ tp->t = ++ip;
+ tp->t[-1] = ' ';
+ tp->wslen = 1;
+ state = START;
+ continue;
+ }
+ else
+ {
+ runelen = 1;
+ s->lineinc = 0;;
+ tp->type = COMMENT;
+ tp->flag |= XTWS;
+ }
+ }
+ break;
+ }
+ ip += runelen;
+ runelen = 1;
+ tp->len = ip - tp->t;
+ tp++;
+ }
+}
+
+/* have seen ?; handle the trigraph it starts (if any) else 0 */
+int
+ trigraph(Source * s)
+{
+ uchar c;
+
+ while (s->inp + 2 >= s->inl && fillbuf(s) != EOF);
+ ;
+ if (s->inp[1] != '?')
+ return 0;
+ c = 0;
+ switch (s->inp[2])
+ {
+ case '=':
+ c = '#';
+ break;
+ case '(':
+ c = '[';
+ break;
+ case '/':
+ c = '\\';
+ break;
+ case ')':
+ c = ']';
+ break;
+ case '\'':
+ c = '^';
+ break;
+ case '<':
+ c = '{';
+ break;
+ case '!':
+ c = '|';
+ break;
+ case '>':
+ c = '}';
+ break;
+ case '-':
+ c = '~';
+ break;
+ }
+ if (c)
+ {
+ *s->inp = c;
+ memmove(s->inp + 1, s->inp + 3, s->inl - s->inp + 2);
+ s->inl -= 2;
+ }
+ return c;
+}
+
+int
+ foldline(Source * s)
+{
+ int n = 1;
+
+ /* skip pending wihite spaces */
+ while ((s->inp[n] == ' ') || (s->inp[n] == '\t'))
+ {
+ n++;
+ if ((s->inp + n >= s->inl) && (fillbuf(s) == EOF))
+ break;
+ }
+
+ /* refill buffer */
+ while (s->inp + (n + 1) >= s->inl && fillbuf(s) != EOF);
+
+ /* skip DOS line ends */
+ if (((s->inp[n] == '\r') && (s->inp[n+1] == '\n')) ||
+ ((s->inp[n] == '\n') && (s->inp[n+1] == '\r')))
+ n++;
+
+ if ((s->inp[n] == '\n') || (s->inp[n] == '\r'))
+ {
+ memmove(s->inp, s->inp + n + 1, s->inl - s->inp + n + 2);
+ s->inl -= n + 1;
+ return 1;
+ }
+ return 0;
+}
+
+int
+ fillbuf(Source * s)
+{
+ int n;
+
+ if (s->fd < 0 || (n = read(s->fd, (char *) s->inl, INS / 8)) <= 0)
+ n = 0;
+ s->inl += n;
+ s->inl[0] = s->inl[1] = s->inl[2] = s->inl[3] = EOB;
+ if (n == 0)
+ {
+ s->inl[0] = s->inl[1] = s->inl[2] = s->inl[3] = EOFC;
+ return EOF;
+ }
+ return 0;
+}
+
+/*
+ * Push down to new source of characters.
+ * If fd>0 and str==NULL, then from a file `name';
+ * if fd==-1 and str, then from the string.
+ */
+Source *
+ setsource(char *name, int path, int fd, char *str, int wrap)
+{
+ Source *s = new(Source);
+ int len;
+
+ s->line = 1;
+ s->lineinc = 0;
+ s->fd = fd;
+ s->filename = name;
+ s->next = cursource;
+ s->ifdepth = 0;
+ s->pathdepth = path;
+ s->wrap = wrap;
+
+ cursource = s;
+
+ if (s->wrap)
+ genwrap(0);
+
+ /* slop at right for EOB */
+ if (str)
+ {
+ len = strlen(str);
+ s->inb = domalloc(len + 4);
+ s->inp = s->inb;
+ strncpy((char *) s->inp, str, len);
+ }
+ else
+ {
+ s->inb = domalloc(INS + 4);
+ s->inp = s->inb;
+ len = 0;
+ }
+ s->inl = s->inp + len;
+ s->inl[0] = s->inl[1] = EOB;
+
+ return s;
+}
+
+void
+ unsetsource(void)
+{
+ Source *s = cursource;
+
+ if (s->wrap)
+ genwrap(1);
+
+ if (s->fd >= 0)
+ {
+ close(s->fd);
+ dofree(s->inb);
+ }
+ cursource = s->next;
+ dofree(s);
+}
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