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Annotation of researchv10no/cmd/cfront/optcfront/tree_copy.c, revision 1.1

1.1     ! root        1: /* ident "@(#)ctrans:src/tree_copy.c   1.3" */
        !             2: /*
        !             3:        $Source: /usr3/lang/benson/work/stripped_cfront/RCS/tree_copy.c,v $ $RCSfile: tree_copy.c,v $
        !             4:        $Revision: 1.1 $                $Date: 89/11/20 08:51:04 $
        !             5:        $Author: benson $               $Locker:  $
        !             6:        $State: Exp $
        !             7: */
        !             8:  
        !             9: /* utilities to copy pieces of cfront trees. 
        !            10:    what we have here is a somewhat parameterizable
        !            11:    action procedure for the tree walker.
        !            12: 
        !            13:    We may make more versions of this for template expansion
        !            14:    and saving things in files, or we may just make it possible
        !            15:    for this to swing more ways. 
        !            16: */
        !            17: 
        !            18: #include "cfront.h"
        !            19: #include "tree_walk.h"
        !            20: #include "tree_copy.h"
        !            21: #include <memory.h>
        !            22: 
        !            23: /* determine whether "n" is a an already defined type */
        !            24: static unsigned int type_is_defined(Pnode n) {
        !            25:   return (Ptype(n)->defined & DEFINED) ;
        !            26: }
        !            27: 
        !            28: void
        !            29: copy_walker (Pnode& node, node_class cl, void * info, 
        !            30:             tree_node_action& action, int, Pnode, tree_walk_tree&,
        !            31:             int& register_in_hash)
        !            32: {
        !            33:     union {
        !            34:        Pnode node;
        !            35:        Pvirt vr;
        !            36:        Plist list;
        !            37:        Pgen g;
        !            38:        Pvec vc;
        !            39:        Pfct f;
        !            40:        Ptable t;
        !            41:        Pbase  bt;
        !            42:        Pexpr  x;
        !            43:        Pstmt  s;
        !            44:        Penum  e;
        !            45:        Pclass c;
        !            46:        Pbcl   bcl;
        !            47:        Pin    iline;
        !            48:        ia   * ia;
        !            49:        Pname  n;
        !            50:        Pptr p;
        !            51:       } n;
        !            52:     Pnode original_node = node;
        !            53: 
        !            54:     tree_copy_info * tci = (tree_copy_info *)info;
        !            55:     action = tna_continue;
        !            56: 
        !            57:     /* first, give an application-specific hook a shot at the node. */
        !            58: 
        !            59:     tci->check_node(node, cl, action, register_in_hash);
        !            60:     if(action != tna_continue) return;    
        !            61: 
        !            62:     if(node != original_node) { /* a replacement */
        !            63:       n.node = node;
        !            64:     } else /* ok, nothing funny, we just go ahead and copy */
        !            65:       switch (cl) {
        !            66:       default:
        !            67:        break;  
        !            68:       case nc_eof:
        !            69:        n.node = Pnode(tci->malloc(sizeof (node)));
        !            70:        *n.node = *node;
        !            71:        goto Replace;
        !            72: 
        !            73:       case nc_virt:
        !            74:        n.vr = Pvirt(tci->malloc(sizeof(virt)));
        !            75:        *n.vr = *Pvirt(node);
        !            76:        goto Replace;
        !            77: 
        !            78:       case nc_nlist:
        !            79:        n.list = Plist(tci->malloc(sizeof(name_list)));
        !            80:        *n.list = *Plist(node);
        !            81:        goto Replace;
        !            82: 
        !            83:       case nc_gen:
        !            84:        n.g = Pgen(tci->malloc(sizeof(gen)));
        !            85:        *n.g = *Pgen(node);
        !            86:        goto Replace;
        !            87: 
        !            88:       case nc_vec: 
        !            89:        n.vc = Pvec(tci->malloc(sizeof(vec)));
        !            90:        *n.vc = *Pvec(node);
        !            91:        goto Replace;
        !            92: 
        !            93:       case nc_ptr:
        !            94:        n.p = Pptr(tci->malloc(sizeof(ptr)));
        !            95:        *n.p = *Pptr(node);
        !            96:        goto Replace;
        !            97: 
        !            98:       case nc_fct:
        !            99:        n.f = Pfct(tci->malloc(sizeof(fct)));
        !           100:        *n.f = *Pfct(node);
        !           101:        if(n.f->f_signature) {
        !           102:            n.f->f_signature =
        !           103:                (char *)tci->malloc(strlen(Pfct(node)->f_signature)+1);
        !           104:            strcpy(n.f->f_signature, Pfct(node)->f_signature);
        !           105:        };
        !           106:        goto Replace;
        !           107: 
        !           108:       case nc_table:
        !           109:        n.t = Ptable(tci->malloc(sizeof(table)));
        !           110:        *n.t = *Ptable(node);
        !           111:        n.t->entries = (Pname *)tci->malloc(sizeof(Pname) * n.t->size);
        !           112:        memcpy((char *)n.t->entries, (char *)Ptable(node)->entries, n.t->size * sizeof(Pname));
        !           113:        n.t->hashtbl = (short *)tci->malloc(sizeof(short) * n.t->hashsize);
        !           114:        memcpy((char *)n.t->hashtbl, (char *)Ptable(node)->hashtbl, n.t->hashsize * sizeof (short));
        !           115:        goto Replace;
        !           116: 
        !           117:       case nc_basetype:
        !           118:        // Don't copy types that have already been dealt with
        !           119:        if (type_is_defined(node)) {
        !           120:          action = tna_stop ;
        !           121:          return ;
        !           122:        }
        !           123:        n.bt = Pbase(tci->malloc(sizeof(basetype)));
        !           124:        *n.bt = *Pbase(node);
        !           125:        if(n.bt->discriminator(0) == 2 && n.bt->b_linkage) {
        !           126:            n.bt->b_linkage = tci->malloc(strlen(n.bt->b_linkage) + 1);
        !           127:            strcpy(n.bt->b_linkage, Pbase(node)->b_linkage);
        !           128:        }
        !           129:        goto Replace;
        !           130: 
        !           131:       case nc_expr:
        !           132:        // cfront needs identity maintaied for these nodes
        !           133:        if ((node == dummy) || (node == zero)) {
        !           134:          action = tna_stop ;
        !           135:          return ;
        !           136:        }
        !           137:        n.x = Pexpr(tci->malloc(sizeof(expr)));
        !           138:        *n.x = *Pexpr(node);
        !           139:        if(n.x->discriminator(1) == 3 && n.x->string) {
        !           140:            n.x->string = tci->malloc(strlen(n.x->string) + 1);
        !           141:            strcpy(n.x->string, Pexpr(node)->string);
        !           142:        }
        !           143:        if(n.x->discriminator(2) == 3 && n.x->string2) {
        !           144:            n.x->string2 = tci->malloc(strlen(n.x->string2) + 1);
        !           145:            strcpy(n.x->string2, Pexpr(node)->string2);
        !           146:        }
        !           147:        goto Replace;
        !           148: 
        !           149:       case nc_stmt:
        !           150:        n.s = Pstmt(tci->malloc(sizeof(stmt)));
        !           151:        *n.s = *Pstmt(node);
        !           152:        goto Replace;
        !           153: 
        !           154:       case nc_enumdef:
        !           155:        if (type_is_defined(node)) {
        !           156:          action = tna_stop ;
        !           157:          return ;
        !           158:        }
        !           159:        n.e = Penum(tci->malloc(sizeof(enumdef)));
        !           160:        *n.e = *Penum(node);
        !           161:        if(n.e->string) {
        !           162:            n.e->string = tci->malloc(n.e->strlen+1);
        !           163:            strcpy(n.e->string, Penum(node)->string);
        !           164:        }
        !           165:        goto Replace;
        !           166: 
        !           167:       case nc_classdef:
        !           168:        // Don't copy types that have already been dealt with
        !           169:        if (type_is_defined(node)) {
        !           170:          action = tna_stop ;
        !           171:          return ;
        !           172:        }
        !           173:        n.c = Pclass(tci->malloc(sizeof(classdef)));
        !           174:        *n.c = *Pclass(node);
        !           175:        if(n.c->string) {
        !           176:            n.c->string = tci->malloc(strlen(n.c->string)+1);
        !           177:            strcpy(n.c->string, Pclass(node)->string);
        !           178:        }
        !           179:        goto Replace;
        !           180: 
        !           181:       case nc_baseclass:
        !           182:        n.bcl = Pbcl(tci->malloc(sizeof(struct basecl)));
        !           183:        *n.bcl = *Pbcl(node);
        !           184:        goto Replace;
        !           185: 
        !           186:       case nc_iline:
        !           187:        n.iline = Pin(tci->malloc(sizeof(iline)));
        !           188:        *n.iline = *Pin(node);
        !           189:        goto Replace;
        !           190: 
        !           191:       case nc_ia:
        !           192:        n.ia = (ia *)tci->malloc(sizeof(ia));
        !           193:        *n.ia = *(ia *)node;
        !           194:        goto Replace;
        !           195: 
        !           196:       case nc_name:
        !           197:        /* check for globalosity */
        !           198:        if(Pname(node)->string && (node == (node->base == TNAME ? ktbl : gtbl)->look(Pname(node)->string, 0))) {
        !           199:            action = tna_stop;
        !           200:            return;
        !           201:        }
        !           202:        n.n = Pname(tci->malloc(sizeof(name)));
        !           203:        *n.n = *Pname(node);
        !           204: /* First, hack exprosity */
        !           205:        if(n.x->discriminator(1) == 3 && n.n->string) {
        !           206:            n.n->string = tci->malloc(strlen(n.n->string) + 1);
        !           207:            strcpy(n.n->string, Pexpr(node)->string);
        !           208:        }
        !           209:        if(n.x->discriminator(2) == 3 && n.n->string2) {
        !           210:            n.n->string2 = tci->malloc(strlen(n.n->string2) + 1);
        !           211:            strcpy(n.n->string2, Pexpr(node)->string2);
        !           212: /* ok, name stuff */
        !           213:        }
        !           214:        if(n.n->n_anon) {
        !           215:            n.n->n_anon = tci->malloc(strlen(n.n->n_anon)+1);
        !           216:            strcpy(n.n->n_anon, Pname(node)->n_anon);
        !           217:        }
        !           218:        if(n.n->n_template_arg_string) {
        !           219:            n.n->n_template_arg_string =
        !           220:                tci->malloc(strlen(n.n->n_template_arg_string)+1);
        !           221:            strcpy(n.n->n_template_arg_string, Pname(node)->n_template_arg_string);
        !           222:        }
        !           223:     }
        !           224:   Replace:
        !           225:     node = n.node;
        !           226:     action = tna_continue;
        !           227:     return;
        !           228: }
        !           229: 
        !           230: static int call_error (int i, const char * s)
        !           231: {
        !           232:     return error (i, s);
        !           233: }
        !           234: 
        !           235: void
        !           236: copy_tree (Pnode& node, tree_copy_info& tci, Hash * cht)
        !           237: {
        !           238:     tree_walk_control twc;
        !           239: 
        !           240:     twc.call_i_error = 1;
        !           241:     twc.i_error = call_error; /* ... in type of error confuses compiler */
        !           242:     twc.action_proc = copy_walker;
        !           243:     twc.nodes_seen_hash = cht;
        !           244:     twc.callback_info = (void *)&tci;
        !           245: 
        !           246:     walk_tree (twc, node);
        !           247: }
        !           248: 

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