diff options
author | ljo <ljo@FreeBSD.org> | 1994-01-05 02:53:40 +0000 |
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committer | ljo <ljo@FreeBSD.org> | 1994-01-05 02:53:40 +0000 |
commit | b0bfbf3dbded7a8d47a844bd1ae18498e620a6f2 (patch) | |
tree | b30007e77419520e5afba465be75d7cc308df521 /usr.bin/f2c/output.c | |
download | FreeBSD-src-b0bfbf3dbded7a8d47a844bd1ae18498e620a6f2.zip FreeBSD-src-b0bfbf3dbded7a8d47a844bd1ae18498e620a6f2.tar.gz |
f2c from netlib.att.com Jan 4 1994
Diffstat (limited to 'usr.bin/f2c/output.c')
-rw-r--r-- | usr.bin/f2c/output.c | 1495 |
1 files changed, 1495 insertions, 0 deletions
diff --git a/usr.bin/f2c/output.c b/usr.bin/f2c/output.c new file mode 100644 index 0000000..6d5bdd4 --- /dev/null +++ b/usr.bin/f2c/output.c @@ -0,0 +1,1495 @@ +/**************************************************************** +Copyright 1990, 1991, 1992, 1993 by AT&T Bell Laboratories and Bellcore. + +Permission to use, copy, modify, and distribute this software +and its documentation for any purpose and without fee is hereby +granted, provided that the above copyright notice appear in all +copies and that both that the copyright notice and this +permission notice and warranty disclaimer appear in supporting +documentation, and that the names of AT&T Bell Laboratories or +Bellcore or any of their entities not be used in advertising or +publicity pertaining to distribution of the software without +specific, written prior permission. + +AT&T and Bellcore disclaim all warranties with regard to this +software, including all implied warranties of merchantability +and fitness. In no event shall AT&T or Bellcore be liable for +any special, indirect or consequential damages or any damages +whatsoever resulting from loss of use, data or profits, whether +in an action of contract, negligence or other tortious action, +arising out of or in connection with the use or performance of +this software. +****************************************************************/ + +#include "defs.h" +#include "names.h" +#include "output.h" + +#ifndef TRUE +#define TRUE 1 +#endif +#ifndef FALSE +#define FALSE 0 +#endif + +char _assoc_table[] = { 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 }; + +/* Opcode table -- This array is indexed by the OP_____ macros defined in + defines.h; these macros are expected to be adjacent integers, so that + this table is as small as possible. */ + +table_entry opcode_table[] = { + { 0, 0, NULL }, + /* OPPLUS 1 */ { BINARY_OP, 12, "%l + %r" }, + /* OPMINUS 2 */ { BINARY_OP, 12, "%l - %r" }, + /* OPSTAR 3 */ { BINARY_OP, 13, "%l * %r" }, + /* OPSLASH 4 */ { BINARY_OP, 13, "%l / %r" }, + /* OPPOWER 5 */ { BINARY_OP, 0, "power (%l, %r)" }, + /* OPNEG 6 */ { UNARY_OP, 14, "-%l" }, + /* OPOR 7 */ { BINARY_OP, 4, "%l || %r" }, + /* OPAND 8 */ { BINARY_OP, 5, "%l && %r" }, + /* OPEQV 9 */ { BINARY_OP, 9, "%l == %r" }, + /* OPNEQV 10 */ { BINARY_OP, 9, "%l != %r" }, + /* OPNOT 11 */ { UNARY_OP, 14, "! %l" }, + /* OPCONCAT 12 */ { BINARY_OP, 0, "concat (%l, %r)" }, + /* OPLT 13 */ { BINARY_OP, 10, "%l < %r" }, + /* OPEQ 14 */ { BINARY_OP, 9, "%l == %r" }, + /* OPGT 15 */ { BINARY_OP, 10, "%l > %r" }, + /* OPLE 16 */ { BINARY_OP, 10, "%l <= %r" }, + /* OPNE 17 */ { BINARY_OP, 9, "%l != %r" }, + /* OPGE 18 */ { BINARY_OP, 10, "%l >= %r" }, + /* OPCALL 19 */ { BINARY_OP, 15, SPECIAL_FMT }, + /* OPCCALL 20 */ { BINARY_OP, 15, SPECIAL_FMT }, + +/* Left hand side of an assignment cannot have outermost parens */ + + /* OPASSIGN 21 */ { BINARY_OP, 2, "%l = %r" }, + /* OPPLUSEQ 22 */ { BINARY_OP, 2, "%l += %r" }, + /* OPSTAREQ 23 */ { BINARY_OP, 2, "%l *= %r" }, + /* OPCONV 24 */ { BINARY_OP, 14, "%l" }, + /* OPLSHIFT 25 */ { BINARY_OP, 11, "%l << %r" }, + /* OPMOD 26 */ { BINARY_OP, 13, "%l %% %r" }, + /* OPCOMMA 27 */ { BINARY_OP, 1, "%l, %r" }, + +/* Don't want to nest the colon operator in parens */ + + /* OPQUEST 28 */ { BINARY_OP, 3, "%l ? %r" }, + /* OPCOLON 29 */ { BINARY_OP, 3, "%l : %r" }, + /* OPABS 30 */ { UNARY_OP, 0, "abs(%l)" }, + /* OPMIN 31 */ { BINARY_OP, 0, SPECIAL_FMT }, + /* OPMAX 32 */ { BINARY_OP, 0, SPECIAL_FMT }, + /* OPADDR 33 */ { UNARY_OP, 14, "&%l" }, + + /* OPCOMMA_ARG 34 */ { BINARY_OP, 15, SPECIAL_FMT }, + /* OPBITOR 35 */ { BINARY_OP, 6, "%l | %r" }, + /* OPBITAND 36 */ { BINARY_OP, 8, "%l & %r" }, + /* OPBITXOR 37 */ { BINARY_OP, 7, "%l ^ %r" }, + /* OPBITNOT 38 */ { UNARY_OP, 14, "~ %l" }, + /* OPRSHIFT 39 */ { BINARY_OP, 11, "%l >> %r" }, + +/* This isn't quite right -- it doesn't handle arrays, for instance */ + + /* OPWHATSIN 40 */ { UNARY_OP, 14, "*%l" }, + /* OPMINUSEQ 41 */ { BINARY_OP, 2, "%l -= %r" }, + /* OPSLASHEQ 42 */ { BINARY_OP, 2, "%l /= %r" }, + /* OPMODEQ 43 */ { BINARY_OP, 2, "%l %%= %r" }, + /* OPLSHIFTEQ 44 */ { BINARY_OP, 2, "%l <<= %r" }, + /* OPRSHIFTEQ 45 */ { BINARY_OP, 2, "%l >>= %r" }, + /* OPBITANDEQ 46 */ { BINARY_OP, 2, "%l &= %r" }, + /* OPBITXOREQ 47 */ { BINARY_OP, 2, "%l ^= %r" }, + /* OPBITOREQ 48 */ { BINARY_OP, 2, "%l |= %r" }, + /* OPPREINC 49 */ { UNARY_OP, 14, "++%l" }, + /* OPPREDEC 50 */ { UNARY_OP, 14, "--%l" }, + /* OPDOT 51 */ { BINARY_OP, 15, "%l.%r" }, + /* OPARROW 52 */ { BINARY_OP, 15, "%l -> %r"}, + /* OPNEG1 53 */ { UNARY_OP, 14, "-%l" }, + /* OPDMIN 54 */ { BINARY_OP, 0, "dmin(%l,%r)" }, + /* OPDMAX 55 */ { BINARY_OP, 0, "dmax(%l,%r)" }, + /* OPASSIGNI 56 */ { BINARY_OP, 2, "%l = &%r" }, + /* OPIDENTITY 57 */ { UNARY_OP, 15, "%l" }, + /* OPCHARCAST 58 */ { UNARY_OP, 14, "(char *)&%l" }, + /* OPDABS 59 */ { UNARY_OP, 0, "dabs(%l)" }, + /* OPMIN2 60 */ { BINARY_OP, 0, "min(%l,%r)" }, + /* OPMAX2 61 */ { BINARY_OP, 0, "max(%l,%r)" }, + +/* kludge to imitate (under forcedouble) f77's bizarre treatement of OPNEG... */ + + /* OPNEG KLUDGE */ { UNARY_OP, 14, "-(doublereal)%l" } +}; /* opcode_table */ + +#define OPNEG_KLUDGE (sizeof(opcode_table)/sizeof(table_entry) - 1) + +static char opeqable[sizeof(opcode_table)/sizeof(table_entry)]; + + +static void output_prim (); +static void output_unary (), output_binary (), output_arg_list (); +static void output_list (), output_literal (); + + +void expr_out (fp, e) +FILE *fp; +expptr e; +{ + if (e == (expptr) NULL) + return; + + switch (e -> tag) { + case TNAME: out_name (fp, (struct Nameblock *) e); + return; + + case TCONST: out_const(fp, &e->constblock); + goto end_out; + case TEXPR: + break; + + case TADDR: out_addr (fp, &(e -> addrblock)); + goto end_out; + + case TPRIM: warn ("expr_out: got TPRIM"); + output_prim (fp, &(e -> primblock)); + return; + + case TLIST: output_list (fp, &(e -> listblock)); + end_out: frexpr(e); + return; + + case TIMPLDO: err ("expr_out: got TIMPLDO"); + return; + + case TERROR: + default: + erri ("expr_out: bad tag '%d'", e -> tag); + } /* switch */ + +/* Now we know that the tag is TEXPR */ + +/* Optimize on simple expressions, such as "a = a + b" ==> "a += b" */ + + if (e -> exprblock.opcode == OPASSIGN && e -> exprblock.rightp && + e -> exprblock.rightp -> tag == TEXPR) { + int opcode; + + opcode = e -> exprblock.rightp -> exprblock.opcode; + + if (opeqable[opcode]) { + expptr leftp, rightp; + + if ((leftp = e -> exprblock.leftp) && + (rightp = e -> exprblock.rightp -> exprblock.leftp)) { + + if (same_ident (leftp, rightp)) { + expptr temp = e -> exprblock.rightp; + + e -> exprblock.opcode = op_assign(opcode); + + e -> exprblock.rightp = temp -> exprblock.rightp; + temp->exprblock.rightp = 0; + frexpr(temp); + } /* if same_ident (leftp, rightp) */ + } /* if leftp && rightp */ + } /* if opcode == OPPLUS || */ + } /* if e -> exprblock.opcode == OPASSIGN */ + + +/* Optimize on increment or decrement by 1 */ + + { + int opcode = e -> exprblock.opcode; + expptr leftp = e -> exprblock.leftp; + expptr rightp = e -> exprblock.rightp; + + if (leftp && rightp && (leftp -> headblock.vstg == STGARG || + ISINT (leftp -> headblock.vtype)) && + (opcode == OPPLUSEQ || opcode == OPMINUSEQ) && + ISINT (rightp -> headblock.vtype) && + ISICON (e -> exprblock.rightp) && + (ISONE (e -> exprblock.rightp) || + e -> exprblock.rightp -> constblock.Const.ci == -1)) { + +/* Allow for the '-1' constant value */ + + if (!ISONE (e -> exprblock.rightp)) + opcode = (opcode == OPPLUSEQ) ? OPMINUSEQ : OPPLUSEQ; + +/* replace the existing opcode */ + + if (opcode == OPPLUSEQ) + e -> exprblock.opcode = OPPREINC; + else + e -> exprblock.opcode = OPPREDEC; + +/* Free up storage used by the right hand side */ + + frexpr (e -> exprblock.rightp); + e->exprblock.rightp = 0; + } /* if opcode == OPPLUS */ + } /* block */ + + + if (is_unary_op (e -> exprblock.opcode)) + output_unary (fp, &(e -> exprblock)); + else if (is_binary_op (e -> exprblock.opcode)) + output_binary (fp, &(e -> exprblock)); + else + erri ("expr_out: bad opcode '%d'", (int) e -> exprblock.opcode); + + free((char *)e); + +} /* expr_out */ + + +void out_and_free_statement (outfile, expr) +FILE *outfile; +expptr expr; +{ + if (expr) + expr_out (outfile, expr); + + nice_printf (outfile, ";\n"); +} /* out_and_free_statement */ + + + +int same_ident (left, right) +expptr left, right; +{ + if (!left || !right) + return 0; + + if (left -> tag == TNAME && right -> tag == TNAME && left == right) + return 1; + + if (left -> tag == TADDR && right -> tag == TADDR && + left -> addrblock.uname_tag == right -> addrblock.uname_tag) + switch (left -> addrblock.uname_tag) { + case UNAM_REF: + case UNAM_NAME: + +/* Check for array subscripts */ + + if (left -> addrblock.user.name -> vdim || + right -> addrblock.user.name -> vdim) + if (left -> addrblock.user.name != + right -> addrblock.user.name || + !same_expr (left -> addrblock.memoffset, + right -> addrblock.memoffset)) + return 0; + + return same_ident ((expptr) (left -> addrblock.user.name), + (expptr) right -> addrblock.user.name); + case UNAM_IDENT: + return strcmp(left->addrblock.user.ident, + right->addrblock.user.ident) == 0; + case UNAM_CHARP: + return strcmp(left->addrblock.user.Charp, + right->addrblock.user.Charp) == 0; + default: + return 0; + } /* switch */ + + if (left->tag == TEXPR && left->exprblock.opcode == OPWHATSIN + && right->tag == TEXPR && right->exprblock.opcode == OPWHATSIN) + return same_ident(left->exprblock.leftp, + right->exprblock.leftp); + + return 0; +} /* same_ident */ + + static int +samefpconst(c1, c2, n) + register Constp c1, c2; + register int n; +{ + char *s1, *s2; + if (!c1->vstg && !c2->vstg) + return c1->Const.cd[n] == c2->Const.cd[n]; + s1 = c1->vstg ? c1->Const.cds[n] : dtos(c1->Const.cd[n]); + s2 = c2->vstg ? c2->Const.cds[n] : dtos(c2->Const.cd[n]); + return !strcmp(s1, s2); + } + + static int +sameconst(c1, c2) + register Constp c1, c2; +{ + switch(c1->vtype) { + case TYCOMPLEX: + case TYDCOMPLEX: + if (!samefpconst(c1,c2,1)) + return 0; + case TYREAL: + case TYDREAL: + return samefpconst(c1,c2,0); + case TYCHAR: + return c1->Const.ccp1.blanks == c2->Const.ccp1.blanks + && c1->vleng->constblock.Const.ci + == c2->vleng->constblock.Const.ci + && !memcmp(c1->Const.ccp, c2->Const.ccp, + (int)c1->vleng->constblock.Const.ci); + case TYSHORT: + case TYINT: + case TYLOGICAL: + return c1->Const.ci == c2->Const.ci; + } + err("unexpected type in sameconst"); + return 0; + } + +/* same_expr -- Returns true only if e1 and e2 match. This is + somewhat pessimistic, but can afford to be because it's just used to + optimize on the assignment operators (+=, -=, etc). */ + +int same_expr (e1, e2) +expptr e1, e2; +{ + if (!e1 || !e2) + return !e1 && !e2; + + if (e1 -> tag != e2 -> tag || e1 -> headblock.vtype != e2 -> headblock.vtype) + return 0; + + switch (e1 -> tag) { + case TEXPR: + if (e1 -> exprblock.opcode != e2 -> exprblock.opcode) + return 0; + + return same_expr (e1 -> exprblock.leftp, e2 -> exprblock.leftp) && + same_expr (e1 -> exprblock.rightp, e2 -> exprblock.rightp); + case TNAME: + case TADDR: + return same_ident (e1, e2); + case TCONST: + return sameconst(&e1->constblock, &e2->constblock); + default: + return 0; + } /* switch */ +} /* same_expr */ + + + +void out_name (fp, namep) + FILE *fp; + Namep namep; +{ + extern int usedefsforcommon; + Extsym *comm; + + if (namep == NULL) + return; + +/* DON'T want to use oneof_stg() here; need to find the right common name + */ + + if (namep->vstg == STGCOMMON && !namep->vcommequiv && !usedefsforcommon) { + comm = &extsymtab[namep->vardesc.varno]; + extern_out(fp, comm); + nice_printf(fp, "%d.", comm->curno); + } /* if namep -> vstg == STGCOMMON */ + + if (namep->vprocclass == PTHISPROC && namep->vtype != TYSUBR) + nice_printf(fp, xretslot[namep->vtype]->user.ident); + else + nice_printf (fp, "%s", namep->cvarname); +} /* out_name */ + + +static char *Longfmt = "%ld"; + +#define cpd(n) cp->vstg ? cp->Const.cds[n] : dtos(cp->Const.cd[n]) + +void out_const(fp, cp) + FILE *fp; + register Constp cp; +{ + static char real_buf[50], imag_buf[50]; + unsigned int k; + int type = cp->vtype; + + switch (type) { + case TYINT1: + case TYSHORT: + nice_printf (fp, "%ld", cp->Const.ci); /* don't cast ci! */ + break; + case TYLONG: +#ifdef TYQUAD + case TYQUAD: +#endif + nice_printf (fp, Longfmt, cp->Const.ci); /* don't cast ci! */ + break; + case TYREAL: + nice_printf(fp, "%s", flconst(real_buf, cpd(0))); + break; + case TYDREAL: + nice_printf(fp, "%s", cpd(0)); + break; + case TYCOMPLEX: + nice_printf(fp, cm_fmt_string, flconst(real_buf, cpd(0)), + flconst(imag_buf, cpd(1))); + break; + case TYDCOMPLEX: + nice_printf(fp, dcm_fmt_string, cpd(0), cpd(1)); + break; + case TYLOGICAL1: + case TYLOGICAL2: + case TYLOGICAL: + nice_printf (fp, "%s", cp->Const.ci ? "TRUE_" : "FALSE_"); + break; + case TYCHAR: { + char *c = cp->Const.ccp, *ce; + + if (c == NULL) { + nice_printf (fp, "\"\""); + break; + } /* if c == NULL */ + + nice_printf (fp, "\""); + ce = c + cp->vleng->constblock.Const.ci; + while(c < ce) { + k = *(unsigned char *)c++; + nice_printf(fp, str_fmt[k], k); + } + for(k = cp->Const.ccp1.blanks; k > 0; k--) + nice_printf(fp, " "); + nice_printf (fp, "\""); + break; + } /* case TYCHAR */ + default: + erri ("out_const: bad type '%d'", (int) type); + break; + } /* switch */ + +} /* out_const */ +#undef cpd + + static void +out_args(fp, ep) FILE *fp; expptr ep; +{ + chainp arglist; + + if(ep->tag != TLIST) + badtag("out_args", ep->tag); + for(arglist = ep->listblock.listp;;) { + expr_out(fp, (expptr)arglist->datap); + arglist->datap = 0; + if (!(arglist = arglist->nextp)) + break; + nice_printf(fp, ", "); + } + } + + +/* out_addr -- this routine isn't local because it is called by the + system-generated identifier printing routines */ + +void out_addr (fp, addrp) +FILE *fp; +struct Addrblock *addrp; +{ + extern Extsym *extsymtab; + int was_array = 0; + char *s; + + + if (addrp == NULL) + return; + if (doin_setbound + && addrp->vstg == STGARG + && addrp->vtype != TYCHAR + && ISICON(addrp->memoffset) + && !addrp->memoffset->constblock.Const.ci) + nice_printf(fp, "*"); + + switch (addrp -> uname_tag) { + case UNAM_REF: + nice_printf(fp, "%s_%s(", addrp->user.name->cvarname, + addrp->cmplx_sub ? "subscr" : "ref"); + out_args(fp, addrp->memoffset); + nice_printf(fp, ")"); + return; + case UNAM_NAME: + out_name (fp, addrp -> user.name); + break; + case UNAM_IDENT: + if (*(s = addrp->user.ident) == ' ') { + if (multitype) + nice_printf(fp, "%s", + xretslot[addrp->vtype]->user.ident); + else + nice_printf(fp, "%s", s+1); + } + else { + nice_printf(fp, "%s", s); + } + break; + case UNAM_CHARP: + nice_printf(fp, "%s", addrp->user.Charp); + break; + case UNAM_EXTERN: + extern_out (fp, &extsymtab[addrp -> memno]); + break; + case UNAM_CONST: + switch(addrp->vstg) { + case STGCONST: + out_const(fp, (Constp)addrp); + break; + case STGMEMNO: + output_literal (fp, (int)addrp->memno, + (Constp)addrp); + break; + default: + Fatal("unexpected vstg in out_addr"); + } + break; + case UNAM_UNKNOWN: + default: + nice_printf (fp, "Unknown Addrp"); + break; + } /* switch */ + +/* It's okay to just throw in the brackets here because they have a + precedence level of 15, the highest value. */ + + if ((addrp->uname_tag == UNAM_NAME && addrp->user.name->vdim + || addrp->ntempelt > 1 || addrp->isarray) + && addrp->vtype != TYCHAR) { + expptr offset; + + was_array = 1; + + offset = addrp -> memoffset; + addrp->memoffset = 0; + if (ONEOF(addrp->vstg, M(STGCOMMON)|M(STGEQUIV)) + && addrp -> uname_tag == UNAM_NAME + && !addrp->skip_offset) + offset = mkexpr (OPMINUS, offset, mkintcon ( + addrp -> user.name -> voffset)); + + nice_printf (fp, "["); + + offset = mkexpr (OPSLASH, offset, + ICON (typesize[addrp -> vtype] * (addrp -> Field ? 2 : 1))); + expr_out (fp, offset); + nice_printf (fp, "]"); + } + +/* Check for structure field reference */ + + if (addrp -> Field && addrp -> uname_tag != UNAM_CONST && + addrp -> uname_tag != UNAM_UNKNOWN) { + if (oneof_stg((addrp -> uname_tag == UNAM_NAME ? addrp -> user.name : + (Namep) NULL), addrp -> vstg, M(STGARG)|M(STGEQUIV)) + && !was_array && (addrp->vclass != CLPROC || !multitype)) + nice_printf (fp, "->%s", addrp -> Field); + else + nice_printf (fp, ".%s", addrp -> Field); + } /* if */ + +/* Check for character subscripting */ + + if (addrp->vtype == TYCHAR && + (addrp->vclass != CLPROC || addrp->uname_tag == UNAM_NAME + && addrp->user.name->vprocclass == PTHISPROC) && + addrp -> memoffset && + (addrp -> uname_tag != UNAM_NAME || + addrp -> user.name -> vtype == TYCHAR) && + (!ISICON (addrp -> memoffset) || + (addrp -> memoffset -> constblock.Const.ci))) { + + int use_paren = 0; + expptr e = addrp -> memoffset; + + if (!e) + return; + addrp->memoffset = 0; + + if (ONEOF(addrp->vstg, M(STGCOMMON)|M(STGEQUIV)) + && addrp -> uname_tag == UNAM_NAME) { + e = mkexpr (OPMINUS, e, mkintcon (addrp -> user.name -> voffset)); + +/* mkexpr will simplify it to zero if possible */ + if (e->tag == TCONST && e->constblock.Const.ci == 0) + return; + } /* if addrp -> vstg == STGCOMMON */ + +/* In the worst case, parentheses might be needed OUTSIDE the expression, + too. But since I think this subscripting can only appear as a + parameter in a procedure call, I don't think outside parens will ever + be needed. INSIDE parens are handled below */ + + nice_printf (fp, " + "); + if (e -> tag == TEXPR) { + int arg_prec = op_precedence (e -> exprblock.opcode); + int prec = op_precedence (OPPLUS); + use_paren = arg_prec && (arg_prec < prec || (arg_prec == prec && + is_left_assoc (OPPLUS))); + } /* if e -> tag == TEXPR */ + if (use_paren) nice_printf (fp, "("); + expr_out (fp, e); + if (use_paren) nice_printf (fp, ")"); + } /* if */ +} /* out_addr */ + + +static void output_literal (fp, memno, cp) + FILE *fp; + int memno; + Constp cp; +{ + struct Literal *litp, *lastlit; + extern char *lit_name (); + + lastlit = litpool + nliterals; + + for (litp = litpool; litp < lastlit; litp++) { + if (litp -> litnum == memno) + break; + } /* for litp */ + + if (litp >= lastlit) + out_const (fp, cp); + else { + nice_printf (fp, "%s", lit_name (litp)); + litp->lituse++; + } +} /* output_literal */ + + +static void output_prim (fp, primp) +FILE *fp; +struct Primblock *primp; +{ + if (primp == NULL) + return; + + out_name (fp, primp -> namep); + if (primp -> argsp) + output_arg_list (fp, primp -> argsp); + + if (primp -> fcharp != (expptr) NULL || primp -> lcharp != (expptr) NULL) + nice_printf (fp, "Sorry, no substrings yet"); +} + + + +static void output_arg_list (fp, listp) +FILE *fp; +struct Listblock *listp; +{ + chainp arg_list; + + if (listp == (struct Listblock *) NULL || listp -> listp == (chainp) NULL) + return; + + nice_printf (fp, "("); + + for (arg_list = listp -> listp; arg_list; arg_list = arg_list -> nextp) { + expr_out (fp, (expptr) arg_list -> datap); + if (arg_list -> nextp != (chainp) NULL) + +/* Might want to add a hook in here to accomodate the style setting which + wants spaces after commas */ + + nice_printf (fp, ","); + } /* for arg_list */ + + nice_printf (fp, ")"); +} /* output_arg_list */ + + + +static void output_unary (fp, e) +FILE *fp; +struct Exprblock *e; +{ + if (e == NULL) + return; + + switch (e -> opcode) { + case OPNEG: + if (e->vtype == TYREAL && forcedouble) { + e->opcode = OPNEG_KLUDGE; + output_binary(fp,e); + e->opcode = OPNEG; + break; + } + case OPNEG1: + case OPNOT: + case OPABS: + case OPBITNOT: + case OPWHATSIN: + case OPPREINC: + case OPPREDEC: + case OPADDR: + case OPIDENTITY: + case OPCHARCAST: + case OPDABS: + output_binary (fp, e); + break; + case OPCALL: + case OPCCALL: + nice_printf (fp, "Sorry, no OPCALL yet"); + break; + default: + erri ("output_unary: bad opcode", (int) e -> opcode); + break; + } /* switch */ +} /* output_unary */ + + + static char * +findconst(m) + register long m; +{ + register struct Literal *litp, *litpe; + + litp = litpool; + for(litpe = litp + nliterals; litp < litpe; litp++) + if (litp->litnum == m) + return litp->cds[0]; + Fatal("findconst failure!"); + return 0; + } + + static int +opconv_fudge(fp,e) + FILE *fp; + struct Exprblock *e; +{ + /* special handling for ichar and character*1 */ + register expptr lp; + register union Expression *Offset; + register char *cp; + int lt; + char buf[8]; + unsigned int k; + Namep np; + + if (!(lp = e->leftp)) /* possible with erroneous Fortran */ + return 1; + lt = lp->headblock.vtype; + if (lt == TYCHAR) { + switch(lp->tag) { + case TNAME: + nice_printf(fp, "*"); + out_name(fp, (Namep)lp); + return 1; + case TCONST: + tconst: + cp = lp->constblock.Const.ccp; + tconst1: + k = *(unsigned char *)cp; + sprintf(buf, chr_fmt[k], k); + nice_printf(fp, "'%s'", buf); + return 1; + case TADDR: + switch(lp->addrblock.vstg) { + case STGMEMNO: + if (halign && e->vtype != TYCHAR) { + nice_printf(fp, "*(%s *)", + c_type_decl(e->vtype,0)); + expr_out(fp, lp); + return 1; + } + cp = findconst(lp->addrblock.memno); + goto tconst1; + case STGCONST: + goto tconst; + } + lp->addrblock.vtype = tyint; + Offset = lp->addrblock.memoffset; + switch(lp->addrblock.uname_tag) { + case UNAM_REF: + nice_printf(fp, "*"); + return 0; + case UNAM_NAME: + np = lp->addrblock.user.name; + if (ONEOF(np->vstg, + M(STGCOMMON)|M(STGEQUIV))) + Offset = mkexpr(OPMINUS, Offset, + ICON(np->voffset)); + } + lp->addrblock.memoffset = Offset ? + mkexpr(OPSTAR, Offset, + ICON(typesize[tyint])) + : ICON(0); + lp->addrblock.isarray = 1; + /* STGCOMMON or STGEQUIV would cause */ + /* voffset to be added in a second time */ + lp->addrblock.vstg = STGUNKNOWN; + break; + default: + badtag("opconv_fudge", lp->tag); + } + } + if (lt != e->vtype) + nice_printf(fp, "(%s) ", + c_type_decl(e->vtype, 0)); + return 0; + } + + +static void output_binary (fp, e) +FILE *fp; +struct Exprblock *e; +{ + char *format; + extern table_entry opcode_table[]; + int prec; + + if (e == NULL || e -> tag != TEXPR) + return; + +/* Instead of writing a huge switch, I've incorporated the output format + into a table. Things like "%l" and "%r" stand for the left and + right subexpressions. This should allow both prefix and infix + functions to be specified (e.g. "(%l * %r", "z_div (%l, %r"). Of + course, I should REALLY think out the ramifications of writing out + straight text, as opposed to some intermediate format, which could + figure out and optimize on the the number of required blanks (we don't + want "x - (-y)" to become "x --y", for example). Special cases (such as + incomplete implementations) could still be implemented as part of the + switch, they will just have some dummy value instead of the string + pattern. Another difficulty is the fact that the complex functions + will differ from the integer and real ones */ + +/* Handle a special case. We don't want to output "x + - 4", or "y - - 3" +*/ + if ((e -> opcode == OPPLUS || e -> opcode == OPMINUS) && + e -> rightp && e -> rightp -> tag == TCONST && + isnegative_const (&(e -> rightp -> constblock)) && + is_negatable (&(e -> rightp -> constblock))) { + + e -> opcode = (e -> opcode == OPPLUS) ? OPMINUS : OPPLUS; + negate_const (&(e -> rightp -> constblock)); + } /* if e -> opcode == PLUS or MINUS */ + + prec = op_precedence (e -> opcode); + format = op_format (e -> opcode); + + if (format != SPECIAL_FMT) { + while (*format) { + if (*format == '%') { + int arg_prec, use_paren = 0; + expptr lp, rp; + + switch (*(format + 1)) { + case 'l': + lp = e->leftp; + if (lp && lp->tag == TEXPR) { + arg_prec = op_precedence(lp->exprblock.opcode); + + use_paren = arg_prec && + (arg_prec < prec || (arg_prec == prec && + is_right_assoc (prec))); + } /* if e -> leftp */ + if (e->opcode == OPCONV && opconv_fudge(fp,e)) + break; + if (use_paren) + nice_printf (fp, "("); + expr_out(fp, lp); + if (use_paren) + nice_printf (fp, ")"); + break; + case 'r': + rp = e->rightp; + if (rp && rp->tag == TEXPR) { + arg_prec = op_precedence(rp->exprblock.opcode); + + use_paren = arg_prec && + (arg_prec < prec || (arg_prec == prec && + is_left_assoc (prec))); + use_paren = use_paren || + (rp->exprblock.opcode == OPNEG + && prec >= op_precedence(OPMINUS)); + } /* if e -> rightp */ + if (use_paren) + nice_printf (fp, "("); + expr_out(fp, rp); + if (use_paren) + nice_printf (fp, ")"); + break; + case '\0': + case '%': + nice_printf (fp, "%%"); + break; + default: + erri ("output_binary: format err: '%%%c' illegal", + (int) *(format + 1)); + break; + } /* switch */ + format += 2; + } else + nice_printf (fp, "%c", *format++); + } /* while *format */ + } else { + +/* Handle Special cases of formatting */ + + switch (e -> opcode) { + case OPCCALL: + case OPCALL: + out_call (fp, (int) e -> opcode, e -> vtype, + e -> vleng, e -> leftp, e -> rightp); + break; + + case OPCOMMA_ARG: + doin_setbound = 1; + nice_printf(fp, "("); + expr_out(fp, e->leftp); + nice_printf(fp, ", &"); + doin_setbound = 0; + expr_out(fp, e->rightp); + nice_printf(fp, ")"); + break; + + case OPADDR: + default: + nice_printf (fp, "Sorry, can't format OPCODE '%d'", + e -> opcode); + break; + } + + } /* else */ +} /* output_binary */ + + +out_call (outfile, op, ftype, len, name, args) +FILE *outfile; +int op, ftype; +expptr len, name, args; +{ + chainp arglist; /* Pointer to any actual arguments */ + chainp cp; /* Iterator over argument lists */ + Addrp ret_val = (Addrp) NULL; + /* Function return value buffer, if any is + required */ + int byvalue; /* True iff we're calling a C library + routine */ + int done_once; /* Used for writing commas to outfile */ + int narg, t; + register expptr q; + long L; + Argtypes *at; + Atype *A, *Ac; + Namep np; + extern int forcereal; + +/* Don't use addresses if we're calling a C function */ + + byvalue = op == OPCCALL; + + if (args) + arglist = args -> listblock.listp; + else + arglist = CHNULL; + +/* If this is a CHARACTER function, the first argument is the result */ + + if (ftype == TYCHAR) + if (ISICON (len)) { + ret_val = (Addrp) (arglist -> datap); + arglist = arglist -> nextp; + } else { + err ("adjustable character function"); + return; + } /* else */ + +/* If this is a COMPLEX function, the first argument is the result */ + + else if (ISCOMPLEX (ftype)) { + ret_val = (Addrp) (arglist -> datap); + arglist = arglist -> nextp; + } /* if ISCOMPLEX */ + +/* Now we can actually start to write out the function invocation */ + + if (ftype == TYREAL && forcereal) + nice_printf(outfile, "(real)"); + if (name -> tag == TEXPR && name -> exprblock.opcode == OPWHATSIN) { + nice_printf (outfile, "("); + np = (Namep)name->exprblock.leftp; /*expr_out will free name */ + expr_out (outfile, name); + nice_printf (outfile, ")"); + } + else { + np = (Namep)name; + expr_out(outfile, name); + } + + /* prepare to cast procedure parameters -- set A if we know how */ + + A = Ac = 0; + if (np->tag == TNAME && (at = np->arginfo)) { + if (at->nargs > 0) + A = at->atypes; + if (Ansi && (at->defined || at->nargs > 0)) + Ac = at->atypes; + } + + nice_printf(outfile, "("); + + if (ret_val) { + if (ISCOMPLEX (ftype)) + nice_printf (outfile, "&"); + expr_out (outfile, (expptr) ret_val); + if (Ac) + Ac++; + +/* The length of the result of a character function is the second argument */ +/* It should be in place from putcall(), so we won't touch it explicitly */ + + } /* if ret_val */ + done_once = ret_val ? TRUE : FALSE; + +/* Now run through the named arguments */ + + narg = -1; + for (cp = arglist; cp; cp = cp -> nextp, done_once = TRUE) { + + if (done_once) + nice_printf (outfile, ", "); + narg++; + + if (!( q = (expptr)cp->datap) ) + continue; + + if (q->tag == TADDR) { + if (q->addrblock.vtype > TYERROR) { + /* I/O block */ + nice_printf(outfile, "&%s", q->addrblock.user.ident); + continue; + } + if (!byvalue && q->addrblock.isarray + && q->addrblock.vtype != TYCHAR + && q->addrblock.memoffset->tag == TCONST) { + + /* check for 0 offset -- after */ + /* correcting for equivalence. */ + L = q->addrblock.memoffset->constblock.Const.ci; + if (ONEOF(q->addrblock.vstg, M(STGCOMMON)|M(STGEQUIV)) + && q->addrblock.uname_tag == UNAM_NAME) + L -= q->addrblock.user.name->voffset; + if (L) + goto skip_deref; + + if (Ac && narg < at->dnargs + && q->headblock.vtype != (t = Ac[narg].type) + && t > TYADDR && t < TYSUBR) + nice_printf(outfile, "(%s*)", typename[t]); + + /* &x[0] == x */ + /* This also prevents &sizeof(doublereal)[0] */ + + switch(q->addrblock.uname_tag) { + case UNAM_NAME: + out_name(outfile, q->addrblock.user.name); + continue; + case UNAM_IDENT: + nice_printf(outfile, "%s", + q->addrblock.user.ident); + continue; + case UNAM_CHARP: + nice_printf(outfile, "%s", + q->addrblock.user.Charp); + continue; + case UNAM_EXTERN: + extern_out(outfile, + &extsymtab[q->addrblock.memno]); + continue; + } + } + } + +/* Skip over the dereferencing operator generated only for the + intermediate file */ + skip_deref: + if (q -> tag == TEXPR && q -> exprblock.opcode == OPWHATSIN) + q = q -> exprblock.leftp; + + if (q->headblock.vclass == CLPROC) { + if (Castargs && (q->tag != TNAME + || q->nameblock.vprocclass != PTHISPROC) + && (q->tag != TADDR + || q->addrblock.uname_tag != UNAM_NAME + || q->addrblock.user.name->vprocclass + != PTHISPROC)) + { + if (A && (t = A[narg].type) >= 200) + t %= 100; + else { + t = q->headblock.vtype; + if (q->tag == TNAME && q->nameblock.vimpltype) + t = TYUNKNOWN; + } + nice_printf(outfile, "(%s)", usedcasts[t] = casttypes[t]); + } + } + else if (Ac && narg < at->dnargs + && q->headblock.vtype != (t = Ac[narg].type) + && t > TYADDR && t < TYSUBR) + nice_printf(outfile, "(%s*)", typename[t]); + + if ((q -> tag == TADDR || q-> tag == TNAME) && + (byvalue || q -> headblock.vstg != STGREG)) { + if (q -> headblock.vtype != TYCHAR) + if (byvalue) { + + if (q -> tag == TADDR && + q -> addrblock.uname_tag == UNAM_NAME && + ! q -> addrblock.user.name -> vdim && + oneof_stg(q -> addrblock.user.name, q -> addrblock.vstg, + M(STGARG)|M(STGEQUIV)) && + ! ISCOMPLEX(q->addrblock.user.name->vtype)) + nice_printf (outfile, "*"); + else if (q -> tag == TNAME + && oneof_stg(&q->nameblock, q -> nameblock.vstg, + M(STGARG)|M(STGEQUIV)) + && !(q -> nameblock.vdim)) + nice_printf (outfile, "*"); + + } else { + expptr memoffset; + + if (q->tag == TADDR && + !ONEOF (q -> addrblock.vstg, M(STGEXT)|M(STGLENG)) + && ( + ONEOF(q->addrblock.vstg, + M(STGCOMMON)|M(STGEQUIV)|M(STGMEMNO)) + || ((memoffset = q->addrblock.memoffset) + && (!ISICON(memoffset) + || memoffset->constblock.Const.ci))) + || ONEOF(q->addrblock.vstg, + M(STGINIT)|M(STGAUTO)|M(STGBSS)) + && !q->addrblock.isarray) + nice_printf (outfile, "&"); + else if (q -> tag == TNAME + && !oneof_stg(&q->nameblock, q -> nameblock.vstg, + M(STGARG)|M(STGEXT)|M(STGEQUIV))) + nice_printf (outfile, "&"); + } /* else */ + + expr_out (outfile, q); + } /* if q -> tag == TADDR || q -> tag == TNAME */ + +/* Might be a Constant expression, e.g. string length, character constants */ + + else if (q -> tag == TCONST) { + if (tyioint == TYLONG) + Longfmt = "%ldL"; + out_const(outfile, &q->constblock); + Longfmt = "%ld"; + } + +/* Must be some other kind of expression, or register var, or constant. + In particular, this is likely to be a temporary variable assignment + which was generated in p1put_call */ + + else if (!ISCOMPLEX (q -> headblock.vtype) && !ISCHAR (q)){ + int use_paren = q -> tag == TEXPR && + op_precedence (q -> exprblock.opcode) <= + op_precedence (OPCOMMA); + + if (use_paren) nice_printf (outfile, "("); + expr_out (outfile, q); + if (use_paren) nice_printf (outfile, ")"); + } /* if !ISCOMPLEX */ + else + err ("out_call: unknown parameter"); + + } /* for (cp = arglist */ + + if (arglist) + frchain (&arglist); + + nice_printf (outfile, ")"); + +} /* out_call */ + + + char * +flconst(buf, x) + char *buf, *x; +{ + sprintf(buf, fl_fmt_string, x); + return buf; + } + + char * +dtos(x) + double x; +{ + static char buf[64]; + sprintf(buf, db_fmt_string, x); + return buf; + } + +char tr_tab[Table_size]; + +/* out_init -- Initialize the data structures used by the routines in + output.c. These structures include the output format to be used for + Float, Double, Complex, and Double Complex constants. */ + +void out_init () +{ + extern int tab_size; + register char *s; + + s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_+-."; + while(*s) + tr_tab[*s++] = 3; + tr_tab['>'] = 1; + + opeqable[OPPLUS] = 1; + opeqable[OPMINUS] = 1; + opeqable[OPSTAR] = 1; + opeqable[OPSLASH] = 1; + opeqable[OPMOD] = 1; + opeqable[OPLSHIFT] = 1; + opeqable[OPBITAND] = 1; + opeqable[OPBITXOR] = 1; + opeqable[OPBITOR ] = 1; + + +/* Set the output format for both types of floating point constants */ + + if (fl_fmt_string == NULL || *fl_fmt_string == '\0') + fl_fmt_string = Ansi == 1 ? "%sf" : "(float)%s"; + + if (db_fmt_string == NULL || *db_fmt_string == '\0') + db_fmt_string = "%.17g"; + +/* Set the output format for both types of complex constants. They will + have string parameters rather than float or double so that the decimal + point may be added to the strings generated by the {db,fl}_fmt_string + formats above */ + + if (cm_fmt_string == NULL || *cm_fmt_string == '\0') { + cm_fmt_string = "{%s,%s}"; + } /* if cm_fmt_string == NULL */ + + if (dcm_fmt_string == NULL || *dcm_fmt_string == '\0') { + dcm_fmt_string = "{%s,%s}"; + } /* if dcm_fmt_string == NULL */ + + tab_size = 4; +} /* out_init */ + + +void extern_out (fp, extsym) +FILE *fp; +Extsym *extsym; +{ + if (extsym == (Extsym *) NULL) + return; + + nice_printf (fp, "%s", extsym->cextname); + +} /* extern_out */ + + + +static void output_list (fp, listp) +FILE *fp; +struct Listblock *listp; +{ + int did_one = 0; + chainp elts; + + nice_printf (fp, "("); + if (listp) + for (elts = listp -> listp; elts; elts = elts -> nextp) { + if (elts -> datap) { + if (did_one) + nice_printf (fp, ", "); + expr_out (fp, (expptr) elts -> datap); + did_one = 1; + } /* if elts -> datap */ + } /* for elts */ + nice_printf (fp, ")"); +} /* output_list */ + + +void out_asgoto (outfile, expr) +FILE *outfile; +expptr expr; +{ + char *user_label(); + chainp value; + Namep namep; + int k; + + if (expr == (expptr) NULL) { + err ("out_asgoto: NULL variable expr"); + return; + } /* if expr */ + + nice_printf (outfile, Ansi ? "switch (" : "switch ((int)"); /*)*/ + expr_out (outfile, expr); + nice_printf (outfile, ") {\n"); + next_tab (outfile); + +/* The initial addrp value will be stored as a namep pointer */ + + switch(expr->tag) { + case TNAME: + /* local variable */ + namep = &expr->nameblock; + break; + case TEXPR: + if (expr->exprblock.opcode == OPWHATSIN + && expr->exprblock.leftp->tag == TNAME) + /* argument */ + namep = &expr->exprblock.leftp->nameblock; + else + goto bad; + break; + case TADDR: + if (expr->addrblock.uname_tag == UNAM_NAME) { + /* initialized local variable */ + namep = expr->addrblock.user.name; + break; + } + default: + bad: + err("out_asgoto: bad expr"); + return; + } + + for(k = 0, value = namep -> varxptr.assigned_values; value; + value = value->nextp, k++) { + nice_printf (outfile, "case %d: goto %s;\n", k, + user_label((long)value->datap)); + } /* for value */ + prev_tab (outfile); + + nice_printf (outfile, "}\n"); +} /* out_asgoto */ + +void out_if (outfile, expr) +FILE *outfile; +expptr expr; +{ + nice_printf (outfile, "if ("); + expr_out (outfile, expr); + nice_printf (outfile, ") {\n"); + next_tab (outfile); +} /* out_if */ + + static void +output_rbrace(outfile, s) + FILE *outfile; + char *s; +{ + extern int last_was_label; + register char *fmt; + + if (last_was_label) { + last_was_label = 0; + fmt = ";%s"; + } + else + fmt = "%s"; + nice_printf(outfile, fmt, s); + } + +void out_else (outfile) +FILE *outfile; +{ + prev_tab (outfile); + output_rbrace(outfile, "} else {\n"); + next_tab (outfile); +} /* out_else */ + +void elif_out (outfile, expr) +FILE *outfile; +expptr expr; +{ + prev_tab (outfile); + output_rbrace(outfile, "} else "); + out_if (outfile, expr); +} /* elif_out */ + +void endif_out (outfile) +FILE *outfile; +{ + prev_tab (outfile); + output_rbrace(outfile, "}\n"); +} /* endif_out */ + +void end_else_out (outfile) +FILE *outfile; +{ + prev_tab (outfile); + output_rbrace(outfile, "}\n"); +} /* end_else_out */ + + + +void compgoto_out (outfile, index, labels) +FILE *outfile; +expptr index, labels; +{ + char *s1, *s2; + + if (index == ENULL) + err ("compgoto_out: null index for computed goto"); + else if (labels && labels -> tag != TLIST) + erri ("compgoto_out: expected label list, got tag '%d'", + labels -> tag); + else { + extern char *user_label (); + chainp elts; + int i = 1; + + s2 = /*(*/ ") {\n"; /*}*/ + if (Ansi) + s1 = "switch ("; /*)*/ + else if (index->tag == TNAME || index->tag == TEXPR + && index->exprblock.opcode == OPWHATSIN) + s1 = "switch ((int)"; /*)*/ + else { + s1 = "switch ((int)("; + s2 = ")) {\n"; /*}*/ + } + nice_printf(outfile, s1); + expr_out (outfile, index); + nice_printf (outfile, s2); + next_tab (outfile); + + for (elts = labels -> listblock.listp; elts; elts = elts -> nextp, i++) { + if (elts -> datap) { + if (ISICON(((expptr) (elts -> datap)))) + nice_printf (outfile, "case %d: goto %s;\n", i, + user_label(((expptr)(elts->datap))->constblock.Const.ci)); + else + err ("compgoto_out: bad label in label list"); + } /* if (elts -> datap) */ + } /* for elts */ + prev_tab (outfile); + nice_printf (outfile, /*{*/ "}\n"); + } /* else */ +} /* compgoto_out */ + + +void out_for (outfile, init, test, inc) +FILE *outfile; +expptr init, test, inc; +{ + nice_printf (outfile, "for ("); + expr_out (outfile, init); + nice_printf (outfile, "; "); + expr_out (outfile, test); + nice_printf (outfile, "; "); + expr_out (outfile, inc); + nice_printf (outfile, ") {\n"); + next_tab (outfile); +} /* out_for */ + + +void out_end_for (outfile) +FILE *outfile; +{ + prev_tab (outfile); + nice_printf (outfile, "}\n"); +} /* out_end_for */ |