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/** R : A Computer Language for Statistical Data Analysis* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka* Copyright (C) 1997--2003 Robert Gentleman, Ross Ihaka and the* R Development Core Team** This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation; either version 2 of the License, or* (at your option) any later version.** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.** You should have received a copy of the GNU General Public License* along with this program; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA*** IMPLEMENTATION NOTES:** Deparsing, has 3 layers. The user interface, do_deparse, should* not be called from an internal function, the actual deparsing needs* to be done twice, once to count things up and a second time to put* them into the string vector for return. Printing this to a file* is handled by the calling routine.*** INDENTATION:** Indentation is carried out in the routine printtab2buff at the* botton of this file. It seems like this should be settable via* options.*** GLOBAL VARIABLES:** linenumber: counts the number of lines that have been written,* this is used to setup storage for deparsing.** len: counts the length of the current line, it will be* used to determine when to break lines.** incurly: keeps track of whether we are inside a curly or not,* this affects the printing of if-then-else.** inlist: keeps track of whether we are inside a list or not,* this affects the printing of if-then-else.** startline: indicator TRUE=start of a line (so we can tab out to* the correct place).** indent: how many tabs should be written at the start of* a line.** buff: contains the current string, we attempt to break* lines at cutoff, but can unlimited length.** lbreak: often used to indicate whether a line has been* broken, this makes sure that that indenting behaves* itself.*//** The code here used to use static variables to share values* across the different routines. These have now been collected* into a struct named LocalParseData and this is explicitly* passed between the different routines. This avoids the needs* for the global variables and allows multiple evaluators, potentially* in different threads, to work on their own independent copies* that are local to their call stacks. This avoids any issues* with interrupts, etc. not restoring values.* The previous issue with the global "cutoff" variable is now implemented* by creating a deparse1WithCutoff() routine which takes the cutoff from* the caller and passes this to the different routines as a member of the* LocalParseData struct. Access to the deparse1() routine remains unaltered.* This is exactly as Ross had suggested ...** One possible fix is to restructure the code with another function which* takes a cutoff value as a parameter. Then "do_deparse" and "deparse1"* could each call this deeper function with the appropriate argument.* I wonder why I didn't just do this? -- it would have been quicker than* writing this note. I guess it needs a bit more thought ...*/#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <Defn.h>#include <Print.h>#include <Fileio.h>#define BUFSIZE 512#define MIN_Cutoff 20#define DEFAULT_Cutoff 60#define MAX_Cutoff (BUFSIZE - 12)/* ----- MAX_Cutoff < BUFSIZE !! */extern int isValidName(char*);#include "RBufferUtils.h"typedef R_StringBuffer DeparseBuffer;typedef struct {int linenumber;int len;int incurly;int inlist;Rboolean startline; /* = TRUE; */int indent;SEXP strvec;DeparseBuffer buffer;int cutoff;int backtick;} LocalParseData;static SEXP deparse1WithCutoff(SEXP call, Rboolean abbrev, int cutoff,Rboolean backtick);static void args2buff(SEXP, int, int, LocalParseData *);static void deparse2buff(SEXP, LocalParseData *);static void print2buff(char *, LocalParseData *);static void printtab2buff(int, LocalParseData *);static void scalar2buff(SEXP, LocalParseData *);static void writeline(LocalParseData *);static void vector2buff(SEXP, LocalParseData *);static void vec2buff(SEXP, LocalParseData *);static void linebreak(Rboolean *lbreak, LocalParseData *);static void deparse2(SEXP, SEXP, LocalParseData *);/*Perhaps we can consolidate all the AllocBuffers into a singleroutine across the files that provide something like this:character.c,saveload.c & scan.c (are identical modulo variable names.)deparse.c, printutils.c (identical and merged)*/void R_AllocStringBuffer(int blen, DeparseBuffer *buf){if(blen >= 0) {if(blen*sizeof(char) < buf->bufsize) return;blen = (blen+1)*sizeof(char);if(blen < buf->defaultSize) blen = buf->defaultSize;if(buf->data == NULL){buf->data = (char *) malloc(blen);buf->data[0] = '\0';} elsebuf->data = (char *) realloc(buf->data, blen);buf->bufsize = blen;if(!buf->data) {buf->bufsize = 0;error("Could not allocate memory for Encodebuf");}} else {if(buf->bufsize == buf->defaultSize) return;free(buf->data);buf->data = (char *) malloc(buf->defaultSize);buf->bufsize = buf->defaultSize;}}void R_FreeStringBuffer(DeparseBuffer *buf){if (buf->data != NULL)free(buf->data);}SEXP do_deparse(SEXP call, SEXP op, SEXP args, SEXP rho){SEXP ca1;int cut0, backtick;/*checkArity(op, args);*/if(length(args) < 1) errorcall(call, "too few arguments");ca1 = CAR(args); args = CDR(args);cut0 = DEFAULT_Cutoff;if(!isNull(CAR(args))) {cut0 = asInteger(CAR(args));if(cut0 == NA_INTEGER|| cut0 < MIN_Cutoff || cut0 > MAX_Cutoff) {warning("invalid `cutoff' for deparse, using default");cut0 = DEFAULT_Cutoff;}}args = CDR(args);backtick = 0;if(!isNull(CAR(args)))backtick = asLogical(CAR(args));ca1 = deparse1WithCutoff(ca1, 0, cut0, backtick);return ca1;}SEXP deparse1(SEXP call, Rboolean abbrev){Rboolean backtick = TRUE;return(deparse1WithCutoff(call, abbrev, DEFAULT_Cutoff, backtick));}static SEXP deparse1WithCutoff(SEXP call, Rboolean abbrev, int cutoff,Rboolean backtick){/* Arg. abbrev:If abbrev is TRUE, then the returned valueis a STRSXP of length 1 with at most 10 characters.This is used for plot labelling etc.*/SEXP svec;int savedigits;/* The following gives warning (when "-pedantic" is used):In function `deparse1WithCutoff': initializer elementis not computable at load time -- and its because of R_NilValue(RH 7.1 gcc 2.96 wrongly gives an error with "-pedantic")*/LocalParseData localData ={0, 0, 0, 0, /*startline = */TRUE, 0,NULL,/*DeparseBuffer=*/{NULL, 0, BUFSIZE},DEFAULT_Cutoff, 0};DeparseBuffer *buffer = &localData.buffer;localData.cutoff = cutoff;localData.backtick = backtick;localData.strvec = R_NilValue;PrintDefaults(R_NilValue);/* from global options() */savedigits = R_print.digits;R_print.digits = DBL_DIG;/* MAX precision */svec = R_NilValue;deparse2(call, svec, &localData);/* just to determine linenumber..*/PROTECT(svec = allocVector(STRSXP, localData.linenumber));deparse2(call, svec, &localData);UNPROTECT(1);if (abbrev) {R_AllocStringBuffer(0, buffer);buffer->data[0] = '\0';strncat(buffer->data, CHAR(STRING_ELT(svec, 0)), 10);if (strlen(CHAR(STRING_ELT(svec, 0))) > 10)strcat(buffer->data, "...");svec = mkString(buffer->data);}R_print.digits = savedigits;R_FreeStringBuffer(buffer);return svec;}/* deparse1line uses the maximum cutoff rather than the default *//* This is needed in terms.formula, where we must be able *//* to deparse a term label into a single line of text so *//* that it can be reparsed correctly */SEXP deparse1line(SEXP call, Rboolean abbrev){SEXP temp;Rboolean backtick=TRUE;temp = deparse1WithCutoff(call, abbrev, MAX_Cutoff, backtick);return(temp);}#include "Rconnections.h"SEXP do_dput(SEXP call, SEXP op, SEXP args, SEXP rho){SEXP saveenv, tval;int i, ifile, res;Rboolean wasopen, havewarned = FALSE;Rconnection con = (Rconnection) 1; /* stdout */checkArity(op, args);tval = CAR(args);saveenv = R_NilValue; /* -Wall */if (TYPEOF(tval) == CLOSXP) {PROTECT(saveenv = CLOENV(tval));SET_CLOENV(tval, R_GlobalEnv);}tval = deparse1(tval, 0);if (TYPEOF(CAR(args)) == CLOSXP) {SET_CLOENV(CAR(args), saveenv);UNPROTECT(1);}ifile = asInteger(CADR(args));wasopen = 1;if (ifile != 1) {con = getConnection(ifile);wasopen = con->isopen;if(!wasopen)if(!con->open(con)) error("cannot open the connection");}/* else: "Stdout" */for (i = 0; i < LENGTH(tval); i++)if (ifile == 1)Rprintf("%s\n", CHAR(STRING_ELT(tval, i)));else {res = Rconn_printf(con, "%s\n", CHAR(STRING_ELT(tval, i)));if(!havewarned &&res < strlen(CHAR(STRING_ELT(tval, i))) + 1)warningcall(call, "wrote too few characters");}if (!wasopen) con->close(con);return (CAR(args));}SEXP do_dump(SEXP call, SEXP op, SEXP args, SEXP rho){SEXP file, names, o, objs, tval, source;int i, j, nobjs, res;Rboolean wasopen, havewarned = FALSE;Rconnection con;char *obj_name;checkArity(op, args);names = CAR(args);file = CADR(args);if(!isString(names))errorcall(call, "character arguments expected");nobjs = length(names);if(nobjs < 1 || length(file) < 1)errorcall(call, "zero length argument");source = CADDR(args);if (source != R_NilValue && TYPEOF(source) != ENVSXP)error("bad environment");PROTECT(o = objs = allocList(nobjs));for (j = 0; j < nobjs; j++, o = CDR(o)) {SET_TAG(o, install(CHAR(STRING_ELT(names, j))));SETCAR(o, findVar(TAG(o), source));if (CAR(o) == R_UnboundValue)error("Object \"%s\" not found", CHAR(PRINTNAME(TAG(o))));}o = objs;if(INTEGER(file)[0] == 1) {for (i = 0; i < nobjs; i++) {obj_name = CHAR(STRING_ELT(names, i));/* figure out if we need to quote the name */if(!isValidName(obj_name))Rprintf("\"%s\" <-\n", obj_name);elseRprintf("%s <-\n", obj_name);if (TYPEOF(CAR(o)) != CLOSXP ||isNull(tval = getAttrib(CAR(o), R_SourceSymbol)))tval = deparse1(CAR(o), 0);for (j = 0; j < LENGTH(tval); j++) {Rprintf("%s\n", CHAR(STRING_ELT(tval, j)));}o = CDR(o);}}else {con = getConnection(INTEGER(file)[0]);wasopen = con->isopen;if (!wasopen)if(!con->open(con)) error("cannot open the connection");for (i = 0; i < nobjs; i++) {res = Rconn_printf(con, "\"%s\" <-\n", CHAR(STRING_ELT(names, i)));if(!havewarned &&res < strlen(CHAR(STRING_ELT(names, i))) + 4)warningcall(call, "wrote too few characters");if (TYPEOF(CAR(o)) != CLOSXP ||isNull(tval = getAttrib(CAR(o), R_SourceSymbol)))tval = deparse1(CAR(o), 0);for (j = 0; j < LENGTH(tval); j++) {res = Rconn_printf(con, "%s\n", CHAR(STRING_ELT(tval, j)));if(!havewarned &&res < strlen(CHAR(STRING_ELT(tval, j))) + 1)warningcall(call, "wrote too few characters");}o = CDR(o);}if (!wasopen) con->close(con);}UNPROTECT(1);R_Visible = 0;return names;}static void linebreak(Rboolean *lbreak, LocalParseData *d){if (d->len > d->cutoff) {if (!*lbreak) {*lbreak = TRUE;d->indent++;}writeline(d);}}static void deparse2(SEXP what, SEXP svec, LocalParseData *d){d->strvec = svec;d->linenumber = 0;d->indent = 0;deparse2buff(what, d);writeline(d);}/* curlyahead looks at s to see if it is a list withthe first op being a curly. You need this kind oflookahead info to print if statements correctly. */static Rbooleancurlyahead(SEXP s){if (isList(s) || isLanguage(s))if (TYPEOF(CAR(s)) == SYMSXP && CAR(s) == install("{"))return TRUE;return FALSE;}/* needsparens looks at an arg to a unary or binary operator todetermine if it needs to be parenthesized when deparsedmainop is a unary or binary operator,arg is an argument to it, on the left if left == 1 */static Rboolean needsparens(PPinfo mainop, SEXP arg, unsigned int left){PPinfo arginfo;if (TYPEOF(arg) == LANGSXP) {if (TYPEOF(CAR(arg)) == SYMSXP) {if ((TYPEOF(SYMVALUE(CAR(arg))) == BUILTINSXP) ||(TYPEOF(SYMVALUE(CAR(arg))) == SPECIALSXP)) {arginfo = PPINFO(SYMVALUE(CAR(arg)));switch(arginfo.kind) {case PP_BINARY: /* Not all binary ops are binary! */case PP_BINARY2:switch(length(CDR(arg))) {case 1:if (!left)return FALSE;if (arginfo.precedence == PREC_SUM) /* binary +/- precedence upgraded as unary */arginfo.precedence = PREC_SIGN;case 2:break;default:return FALSE;}case PP_ASSIGN:case PP_ASSIGN2:case PP_SUBSET:case PP_UNARY:case PP_DOLLAR:if (mainop.precedence > arginfo.precedence|| (mainop.precedence == arginfo.precedence && left == mainop.rightassoc)) {return TRUE;}break;case PP_FOR:case PP_IF:case PP_WHILE:case PP_REPEAT:return left == 1;break;default:return FALSE;}}}}else if ((TYPEOF(arg) == CPLXSXP) && (length(arg) == 1)) {if (mainop.precedence > PREC_SUM|| (mainop.precedence == PREC_SUM && left == mainop.rightassoc)) {return TRUE;}}return FALSE;}static void attr1(SEXP s, LocalParseData *d){if(ATTRIB(s) != R_NilValue)print2buff("structure(", d);}static void attr2(SEXP s, LocalParseData *d){if(ATTRIB(s) != R_NilValue) {SEXP a = ATTRIB(s);while(!isNull(a)) {print2buff(", ", d);if(TAG(a) == R_DimSymbol) {print2buff(".Dim", d);}else if(TAG(a) == R_DimNamesSymbol) {print2buff(".Dimnames", d);}else if(TAG(a) == R_NamesSymbol) {print2buff(".Names", d);}else if(TAG(a) == R_TspSymbol) {print2buff(".Tsp", d);}else if(TAG(a) == R_LevelsSymbol) {print2buff(".Label", d);}else {/* TAG(a) might contain spaces etc */char *tag = CHAR(PRINTNAME(TAG(a)));if(isValidName(tag))deparse2buff(TAG(a), d);else {print2buff("\"", d);deparse2buff(TAG(a), d);print2buff("\"", d);}}print2buff(" = ", d);deparse2buff(CAR(a), d);a = CDR(a);}print2buff(")", d);}}static void printcomment(SEXP s, LocalParseData *d){SEXP cmt;int i, ncmt;/* look for old-style comments first */if(isList(TAG(s)) && !isNull(TAG(s))) {for (s = TAG(s); s != R_NilValue; s = CDR(s)) {print2buff(CHAR(STRING_ELT(CAR(s), 0)), d);writeline(d);}}else {cmt = getAttrib(s, R_CommentSymbol);ncmt = length(cmt);for(i = 0 ; i < ncmt ; i++) {print2buff(CHAR(STRING_ELT(cmt, i)), d);writeline(d);}}}static char * backquotify(char *s){static char buf[120];char *t = buf;/* If a symbol is not a valid name, put it in backquotes, escaping* any backquotes in the string itself *//* NOTE: This could be fragile if sufficiently weird names are* used. Ideally, we should insert backslash escapes, etc. */if (isValidName(s) || *s == '\0') return s;*t++ = '`';while ( *s ) {if ( *s == '`' || *s == '\\' )*t++ = '\\';*t++ = *s++;}*t++ = '`';*t = '\0';return buf;}/* This is the recursive part of deparsing. */static void deparse2buff(SEXP s, LocalParseData *d){PPinfo fop;Rboolean lookahead = FALSE, lbreak = FALSE, parens;SEXP op, t;char tpb[120];switch (TYPEOF(s)) {case NILSXP:print2buff("NULL", d);break;case SYMSXP:if (d->backtick)print2buff(backquotify(CHAR(PRINTNAME(s))), d);elseprint2buff(CHAR(PRINTNAME(s)), d);break;case CHARSXP:print2buff(CHAR(s), d);break;case SPECIALSXP:case BUILTINSXP:snprintf(tpb, 120, ".Primitive(\"%s\")", PRIMNAME(s));print2buff(tpb, d);break;case PROMSXP:deparse2buff(PREXPR(s), d);break;case CLOSXP:print2buff("function (", d);args2buff(FORMALS(s), 0, 1, d);print2buff(") ", d);writeline(d);deparse2buff(BODY_EXPR(s), d);break;case ENVSXP:print2buff("<environment>", d);break;case VECSXP:attr1(s, d);print2buff("list(", d);vec2buff(s, d);print2buff(")", d);attr2(s, d);break;case EXPRSXP:if(length(s) <= 0)print2buff("expression()", d);else {print2buff("expression(", d);vec2buff(s, d);print2buff(")", d);}break;case LISTSXP:attr1(s, d);print2buff("list(", d);d->inlist++;for (t=s ; CDR(t) != R_NilValue ; t=CDR(t) ) {if( TAG(t) != R_NilValue ) {deparse2buff(TAG(t), d);print2buff(" = ", d);}deparse2buff(CAR(t), d);print2buff(", ", d);}if( TAG(t) != R_NilValue ) {deparse2buff(TAG(t), d);print2buff(" = ", d);}deparse2buff(CAR(t), d);print2buff(")", d);d->inlist--;attr2(s, d);break;case LANGSXP:printcomment(s, d);if (TYPEOF(CAR(s)) == SYMSXP) {if ((TYPEOF(SYMVALUE(CAR(s))) == BUILTINSXP) ||(TYPEOF(SYMVALUE(CAR(s))) == SPECIALSXP)) {op = CAR(s);fop = PPINFO(SYMVALUE(op));s = CDR(s);if (fop.kind == PP_BINARY) {switch (length(s)) {case 1:fop.kind = PP_UNARY;if (fop.precedence == PREC_SUM) /* binary +/- precedence upgraded as unary */fop.precedence = PREC_SIGN;break;case 2:break;default:fop.kind = PP_FUNCALL;break;}}else if (fop.kind == PP_BINARY2) {if (length(s) != 2)fop.kind = PP_FUNCALL;}switch (fop.kind) {case PP_IF:print2buff("if (", d);/* print the predicate */deparse2buff(CAR(s), d);print2buff(") ", d);if (d->incurly && !d->inlist ) {lookahead = curlyahead(CAR(CDR(s)));if (!lookahead) {writeline(d);d->indent++;}}/* need to find out if there is an else */if (length(s) > 2) {deparse2buff(CAR(CDR(s)), d);if (d->incurly && !d->inlist) {writeline(d);if (!lookahead)d->indent--;}elseprint2buff(" ", d);print2buff("else ", d);deparse2buff(CAR(CDDR(s)), d);}else {deparse2buff(CAR(CDR(s)), d);if (d->incurly && !lookahead && !d->inlist )d->indent--;}break;case PP_WHILE:print2buff("while (", d);deparse2buff(CAR(s), d);print2buff(") ", d);deparse2buff(CADR(s), d);break;case PP_FOR:print2buff("for (", d);deparse2buff(CAR(s), d);print2buff(" in ", d);deparse2buff(CADR(s), d);print2buff(") ", d);deparse2buff(CADR(CDR(s)), d);break;case PP_REPEAT:print2buff("repeat ", d);deparse2buff(CAR(s), d);break;case PP_CURLY:print2buff("{", d);d->incurly += 1;d->indent++;writeline(d);while (s != R_NilValue) {deparse2buff(CAR(s), d);writeline(d);s = CDR(s);}d->indent--;print2buff("}", d);d->incurly -= 1;break;case PP_PAREN:print2buff("(", d);deparse2buff(CAR(s), d);print2buff(")", d);break;case PP_SUBSET:deparse2buff(CAR(s), d);if (PRIMVAL(SYMVALUE(op)) == 1)print2buff("[", d);elseprint2buff("[[", d);args2buff(CDR(s), 0, 0, d);if (PRIMVAL(SYMVALUE(op)) == 1)print2buff("]", d);elseprint2buff("]]", d);break;case PP_FUNCALL:case PP_RETURN:if (isValidName(CHAR(PRINTNAME(op))))print2buff(CHAR(PRINTNAME(op)), d);else {print2buff("\"", d);print2buff(CHAR(PRINTNAME(op)), d);print2buff("\"", d);}print2buff("(", d);d->inlist++;args2buff(s, 0, 0, d);d->inlist--;print2buff(")", d);break;case PP_FOREIGN:print2buff(CHAR(PRINTNAME(op)), d);print2buff("(", d);d->inlist++;args2buff(s, 1, 0, d);d->inlist--;print2buff(")", d);break;case PP_FUNCTION:printcomment(s, d);print2buff(CHAR(PRINTNAME(op)), d);print2buff("(", d);args2buff(FORMALS(s), 0, 1, d);print2buff(") ", d);deparse2buff(CADR(s), d);break;case PP_ASSIGN:case PP_ASSIGN2:if ((parens = needsparens(fop, CAR(s), 1)))print2buff("(", d);deparse2buff(CAR(s), d);if (parens)print2buff(")", d);print2buff(" ", d);print2buff(CHAR(PRINTNAME(op)), d);print2buff(" ", d);if ((parens = needsparens(fop, CADR(s), 0)))print2buff("(", d);deparse2buff(CADR(s), d);if (parens)print2buff(")", d);break;case PP_DOLLAR:if ((parens = needsparens(fop, CAR(s), 1)))print2buff("(", d);deparse2buff(CAR(s), d);if (parens)print2buff(")", d);print2buff(CHAR(PRINTNAME(op)), d);/*temp fix to handle printing of x$a's */if( isString(CADR(s)) &&isValidName(CHAR(STRING_ELT(CADR(s), 0))))deparse2buff(STRING_ELT(CADR(s), 0), d);else {if ((parens = needsparens(fop, CADR(s), 0)))print2buff("(", d);deparse2buff(CADR(s), d);if (parens)print2buff(")", d);}break;case PP_BINARY:if ((parens = needsparens(fop, CAR(s), 1)))print2buff("(", d);deparse2buff(CAR(s), d);if (parens)print2buff(")", d);print2buff(" ", d);print2buff(CHAR(PRINTNAME(op)), d);print2buff(" ", d);linebreak(&lbreak, d);if ((parens = needsparens(fop, CADR(s), 0)))print2buff("(", d);deparse2buff(CADR(s), d);if (parens)print2buff(")", d);if (lbreak) {d->indent--;lbreak = FALSE;}break;case PP_BINARY2: /* no space between op and args */if ((parens = needsparens(fop, CAR(s), 1)))print2buff("(", d);deparse2buff(CAR(s), d);if (parens)print2buff(")", d);print2buff(CHAR(PRINTNAME(op)), d);if ((parens = needsparens(fop, CADR(s), 0)))print2buff("(", d);deparse2buff(CADR(s), d);if (parens)print2buff(")", d);break;case PP_UNARY:print2buff(CHAR(PRINTNAME(op)), d);if ((parens = needsparens(fop, CAR(s), 0)))print2buff("(", d);deparse2buff(CAR(s), d);if (parens)print2buff(")", d);break;case PP_BREAK:print2buff("break", d);break;case PP_NEXT:print2buff("next", d);break;case PP_SUBASS:print2buff("\"", d);print2buff(CHAR(PRINTNAME(op)), d);print2buff("\"(", d);args2buff(s, 0, 0, d);print2buff(")", d);break;default:UNIMPLEMENTED("deparse2buff");}}else {if(isSymbol(CAR(s)) && isUserBinop(CAR(s))) {op = CAR(s);s = CDR(s);deparse2buff(CAR(s), d);print2buff(" ", d);print2buff(CHAR(PRINTNAME(op)), d);print2buff(" ", d);linebreak(&lbreak, d);deparse2buff(CADR(s), d);if (lbreak) {d->indent--;lbreak = FALSE;}break;}else {if ( isSymbol(CAR(s))&& TYPEOF(SYMVALUE(CAR(s))) == CLOSXP&& streql(CHAR(PRINTNAME(CAR(s))), "::") ){ /* :: is special case */deparse2buff(CADR(s), d);print2buff("::", d);deparse2buff(CADDR(s), d);}else if ( isSymbol(CAR(s))&& TYPEOF(SYMVALUE(CAR(s))) == CLOSXP&& streql(CHAR(PRINTNAME(CAR(s))), ":::") ){ /* ::: is special case */deparse2buff(CADR(s), d);print2buff(":::", d);deparse2buff(CADDR(s), d);}else {if ( isSymbol(CAR(s)) ){if ( !isValidName(CHAR(PRINTNAME(CAR(s)))) ){print2buff("\"", d);print2buff(CHAR(PRINTNAME(CAR(s))), d);print2buff("\"", d);} elseprint2buff(CHAR(PRINTNAME(CAR(s))), d);}elsedeparse2buff(CAR(s), d);print2buff("(", d);args2buff(CDR(s), 0, 0, d);print2buff(")", d);}}}}else if (TYPEOF(CAR(s)) == CLOSXP || TYPEOF(CAR(s)) == SPECIALSXP|| TYPEOF(CAR(s)) == BUILTINSXP) {deparse2buff(CAR(s), d);print2buff("(", d);args2buff(CDR(s), 0, 0, d);print2buff(")", d);}else { /* we have a lambda expression */deparse2buff(CAR(s), d);print2buff("(", d);args2buff(CDR(s), 0, 0, d);print2buff(")", d);}break;case STRSXP:case LGLSXP:case INTSXP:case REALSXP:case CPLXSXP:attr1(s, d);vector2buff(s, d);attr2(s, d);break;case EXTPTRSXP:sprintf(tpb, "<pointer: %p>", R_ExternalPtrAddr(s));print2buff(tpb, d);break;#ifdef BYTECODEcase BCODESXP:print2buff("<bytecode>", d);break;#endifcase WEAKREFSXP:sprintf(tpb, "<weak reference>");print2buff(tpb, d);break;default:UNIMPLEMENTED("deparse2buff");}}/* If there is a string array active point to that, and *//* otherwise we are counting lines so don't do anything. */static void writeline(LocalParseData *d){if (d->strvec != R_NilValue)SET_STRING_ELT(d->strvec, d->linenumber, mkChar(d->buffer.data));d->linenumber++;/* reset */d->len = 0;d->buffer.data[0] = '\0';d->startline = TRUE;}static void print2buff(char *strng, LocalParseData *d){int tlen, bufflen;if (d->startline) {d->startline = FALSE;printtab2buff(d->indent, d); /*if at the start of a line tab over */}tlen = strlen(strng);R_AllocStringBuffer(0, &(d->buffer));bufflen = strlen(d->buffer.data);/*if (bufflen + tlen > BUFSIZE) {buff[0] = '\0';error("string too long in deparse");}*/R_AllocStringBuffer(bufflen + tlen, &(d->buffer));strcat(d->buffer.data, strng);d->len += tlen;}static void scalar2buff(SEXP inscalar, LocalParseData *d){char *strp;strp = EncodeElement(inscalar, 0, '"');print2buff(strp, d);}static void vector2buff(SEXP vector, LocalParseData *d){int tlen, i, quote;char *strp;tlen = length(vector);if( isString(vector) )quote='"';elsequote=0;if (tlen == 0) {switch(TYPEOF(vector)) {case LGLSXP: print2buff("logical(0)", d); break;case INTSXP: print2buff("integer(0)", d); break;case REALSXP: print2buff("numeric(0)", d); break;case CPLXSXP: print2buff("complex(0)", d); break;case STRSXP: print2buff("character(0)", d); break;}}else if (tlen == 1) {if(TYPEOF(vector) == INTSXP) print2buff("as.integer(", d);scalar2buff(vector, d);if(TYPEOF(vector) == INTSXP) print2buff(")", d);}else {if(TYPEOF(vector) == INTSXP) print2buff("as.integer(", d);print2buff("c(", d);for (i = 0; i < tlen; i++) {strp = EncodeElement(vector, i, quote);print2buff(strp, d);if (i < (tlen - 1))print2buff(", ", d);if (d->len > d->cutoff)writeline(d);}print2buff(")", d);if(TYPEOF(vector) == INTSXP) print2buff(")", d);}}/* vec2buff : New Code *//* Deparse vectors of S-expressions. *//* In particular, this deparses objects of mode expression. */static void vec2buff(SEXP v, LocalParseData *d){SEXP nv;int i, n;Rboolean lbreak = FALSE;n = length(v);nv = getAttrib(v, R_NamesSymbol);if (length(nv) == 0) nv = R_NilValue;for(i = 0 ; i < n ; i++) {if (i > 0)print2buff(", ", d);linebreak(&lbreak, d);if (!isNull(nv) && !isNull(STRING_ELT(nv, i))&& *CHAR(STRING_ELT(nv, i))) {if( isValidName(CHAR(STRING_ELT(nv, i))) )deparse2buff(STRING_ELT(nv, i), d);else {print2buff("\"", d);deparse2buff(STRING_ELT(nv, i), d);print2buff("\"", d);}print2buff(" = ", d);}deparse2buff(VECTOR_ELT(v, i), d);}if (lbreak)d->indent--;}static void args2buff(SEXP arglist, int lineb, int formals, LocalParseData *d){Rboolean lbreak = FALSE;while (arglist != R_NilValue) {if (TYPEOF(arglist) != LISTSXP && TYPEOF(arglist) != LANGSXP)error("badly formed function expression");if (TAG(arglist) != R_NilValue) {#if 0deparse2buff(TAG(arglist));#elsechar tpb[120];SEXP s = TAG(arglist);if( s == R_DotsSymbol || isValidName(CHAR(PRINTNAME(s))) )print2buff(CHAR(PRINTNAME(s)), d);else {if( strlen(CHAR(PRINTNAME(s)))< 117 ) {snprintf(tpb, 120, "\"%s\"",CHAR(PRINTNAME(s)));print2buff(tpb, d);}else {sprintf(tpb,"\"");strncat(tpb, CHAR(PRINTNAME(s)), 117);strcat(tpb, "\"");print2buff(tpb, d);}}#endifif(formals) {if (CAR(arglist) != R_MissingArg) {print2buff(" = ", d);deparse2buff(CAR(arglist), d);}}else {print2buff(" = ", d);if (CAR(arglist) != R_MissingArg) {deparse2buff(CAR(arglist), d);}}}else deparse2buff(CAR(arglist), d);arglist = CDR(arglist);if (arglist != R_NilValue) {print2buff(", ", d);linebreak(&lbreak, d);}}if (lbreak)d->indent--;}/* This code controls indentation. Used to follow the S style, *//* (print 4 tabs and then start printing spaces only) but I *//* modified it to be closer to emacs style (RI). */static void printtab2buff(int ntab, LocalParseData *d){int i;for (i = 1; i <= ntab; i++)if (i <= 4)print2buff(" ", d);elseprint2buff(" ", d);}