made todo labels consistent

src/assign.c

@@ -78,7 +78,7 @@ closest I got to getting it to pass all tests :
   setAttrib(x, SelfRefSymbol, p = R_MakeExternalPtr(
     R_NilValue,         // for identical() to return TRUE. identical() doesn't look at tag and prot
     R_NilValue, //getAttrib(x, R_NamesSymbol), // to detect if names has been replaced and its tl lost, e.g. setattr(DT,"names",...)
-    PROTECT(            // needed when --enable-strict-barrier it seems, iiuc. TO DO: test under that flag and remove if not needed.
+    PROTECT(            // needed when --enable-strict-barrier it seems, iiuc. todo: test under that flag and remove if not needed.
       env               // wrap x in env to avoid an infinite loop in object.size() if prot=x were here
     )
   ));
@@ -151,10 +151,10 @@ static SEXP shallow(SEXP dt, SEXP cols, R_len_t n)
   // called from alloccol where n is checked carefully, or from shallow() at R level
   // where n is set to truelength (i.e. a shallow copy only with no size change)
   int protecti=0;
-  SEXP newdt = PROTECT(allocVector(VECSXP, n)); protecti++;   // to do, use growVector here?
+  SEXP newdt = PROTECT(allocVector(VECSXP, n)); protecti++;   // todo: use growVector here?
   SHALLOW_DUPLICATE_ATTRIB(newdt, dt);
 
-  // TO DO: keepattr() would be faster, but can't because shallow isn't merely a shallow copy. It
+  // todo: keepattr() would be faster, but can't because shallow isn't merely a shallow copy. It
   //        also increases truelength. Perhaps make that distinction, then, and split out, but marked
   //        so that the next change knows to duplicate.
   //        keepattr() also merely points to the entire attributes list and thus doesn't allow replacing
@@ -256,7 +256,7 @@ SEXP alloccol(SEXP dt, R_len_t n, Rboolean verbose)
   if (!selfrefok(dt,verbose))
     return shallow(dt,R_NilValue,(n>l) ? n : l);  // e.g. test 848 and 851 in R > 3.0.2
     // added (n>l) ? ... for #970, see test 1481.
-  // TO DO:  test realloc names if selfrefnamesok (users can setattr(x,"name") themselves for example.
+  // todo:  test realloc names if selfrefnamesok (users can setattr(x,"name") themselves for example.
   // if (TRUELENGTH(getAttrib(dt,R_NamesSymbol))!=tl)
   //    internal_error(__func__, "tl of dt passes checks, but tl of names (%d) != tl of dt (%d)", tl, TRUELENGTH(getAttrib(dt,R_NamesSymbol))); // # nocov
 
@@ -379,7 +379,7 @@ SEXP assign(SEXP dt, SEXP rows, SEXP cols, SEXP newcolnames, SEXP values)
       if (rowsd[i]>=0) numToDo++;
     }
     if (verbose) Rprintf(_("Assigning to %d row subset of %d rows\n"), numToDo, nrow);
-    // TODO: include in message if any rows are assigned several times (e.g. by=.EACHI with dups in i)
+    // todo: include in message if any rows are assigned several times (e.g. by=.EACHI with dups in i)
     if (numToDo==0) {
       // isString(cols) is exclusive to calls from set()
       if (!length(newcolnames) && !isString(cols)) {
@@ -509,7 +509,7 @@ SEXP assign(SEXP dt, SEXP rows, SEXP cols, SEXP newcolnames, SEXP values)
   // modify DT by reference. Other than if new columns are being added and the allocVec() fails with
   // out-of-memory. In that case the user will receive hard halt and know to rerun.
   if (length(newcolnames)) {
-    oldtncol = TRUELENGTH(dt);   // TO DO: oldtncol can be just called tl now, as we won't realloc here any more.
+    oldtncol = TRUELENGTH(dt);   // todo: oldtncol can be just called tl now, as we won't realloc here any more.
 
     if (oldtncol<oldncol) {
       if (oldtncol==0) error(_("This data.table has either been loaded from disk (e.g. using readRDS()/load()) or constructed manually (e.g. using structure()). Please run setDT() or setalloccol() on it first (to pre-allocate space for new columns) before assigning by reference to it."));   // #2996
@@ -1260,7 +1260,7 @@ SEXP allocNAVector(SEXPTYPE type, R_len_t n)
 
 SEXP allocNAVectorLike(SEXP x, R_len_t n) {
   // writeNA needs the attribute retained to write NA_INTEGER64, #3723
-  // TODO: remove allocNAVector above when usage in fastmean.c, fcast.c and fmelt.c can be adjusted; see comments in PR3724
+  // todo: remove allocNAVector above when usage in fastmean.c, fcast.c and fmelt.c can be adjusted; see comments in PR3724
   SEXP v = PROTECT(allocVector(TYPEOF(x), n));
   copyMostAttrib(x, v);
   writeNA(v, 0, n, false);

src/between.c

@@ -180,7 +180,7 @@ SEXP between(SEXP x, SEXP lower, SEXP upper, SEXP incbounds, SEXP NAboundsArg, S
     const SEXP *xp = STRING_PTR_RO(x);
     #define LCMP (strcmp(CHAR(ENC2UTF8(l)),CHAR(ENC2UTF8(elem)))<=-open)
     #define UCMP (strcmp(CHAR(ENC2UTF8(elem)),CHAR(ENC2UTF8(u)))<=-open)
-    // TODO if all ascii can be parallel, otherwise ENC2UTF8 could allocate
+    // todo: if all ascii can be parallel, otherwise ENC2UTF8 could allocate
     if (check) for (int i=0; i<longestBound; ++i) {
       const SEXP l=lp[i & lowMask], u=up[i & uppMask];
       if (l!=NA_STRING && u!=NA_STRING && l!=u && strcmp(CHAR(ENC2UTF8(l)), CHAR(ENC2UTF8(u)))>0)

src/bmerge.c

@@ -152,7 +152,7 @@ SEXP bmerge(SEXP idt, SEXP xdt, SEXP icolsArg, SEXP xcolsArg, SEXP xoArg, SEXP r
   } else { // equi joins (or) non-equi join but no multiple matches
     retFirstArg = PROTECT(allocVector(INTSXP, anslen));
     retFirst = INTEGER(retFirstArg);
-    retLengthArg = PROTECT(allocVector(INTSXP, anslen)); // TODO: no need to allocate length at all when
+    retLengthArg = PROTECT(allocVector(INTSXP, anslen)); // todo: no need to allocate length at all when
     retLength = INTEGER(retLengthArg);                   // mult = "first" / "last"
     retIndexArg = PROTECT(allocVector(INTSXP, 0));
     retIndex = INTEGER(retIndexArg);
@@ -162,7 +162,7 @@ SEXP bmerge(SEXP idt, SEXP xdt, SEXP icolsArg, SEXP xcolsArg, SEXP xoArg, SEXP r
     // defaults need to populated here as bmerge_r may well not touch many locations, say if the last row of i is before the first row of x.
     retFirst[j] = nomatch;   // default to no match for NA goto below
   }
-  // retLength[j] = 0;   // TO DO: do this to save the branch below and later branches at R level to set .N to 0
+  // retLength[j] = 0;   // todo: do this to save the branch below and later branches at R level to set .N to 0
   int retLengthVal = (int)(nomatch != 0);
   for (int j=0; j<anslen; j++)
     retLength[j] = retLengthVal;
@@ -271,12 +271,12 @@ void bmerge_r(int xlowIn, int xuppIn, int ilowIn, int iuppIn, int col, int thisg
       XVAL;                                                                                       \
       if (CMP1) {   /* relies on NA_INTEGER==INT_MIN, tested in init.c */                         \
         xlow=mid;                                                                                 \
-      } else if (CMP2)  {   /* TO DO: switch(sign(xval-ival)) ? */                                \
+      } else if (CMP2)  {   /* todo: switch(sign(xval-ival)) ? */                                \
         xupp=mid;                                                                                 \
       } else {                                                                                    \
         /* xval == ival  including NA_INTEGER==NA_INTEGER                                         \
            branch mid to find start and end of this group in this column                          \
-           TO DO?: not if mult=first|last and col<ncol-1 */                                       \
+           todo: not if mult=first|last and col<ncol-1 */                                       \
         int tmplow = mid;                                                                         \
         while (tmplow<xupp-1) {                                                                   \
           int mid = tmplow + (xupp-tmplow)/2;                                                     \
@@ -341,7 +341,7 @@ void bmerge_r(int xlowIn, int xuppIn, int ilowIn, int iuppIn, int col, int thisg
       }                                                                                           \
     }                                                                                             \
     int tmplow = lir;                                                                             \
-    while (tmplow<iupp-1) { /* TO DO: could double up from lir rather than halving from iupp */   \
+    while (tmplow<iupp-1) { /* todo: could double up from lir rather than halving from iupp */   \
       int mid = tmplow + (iupp-tmplow)/2;                                                         \
       if (WRAP(icv[ o ? o[mid]-1 : mid ]) == IVAL) tmplow=mid; else iupp=mid;                     \
       /* if we could guarantee ivals to be *always* sorted for all columns independently          \
@@ -375,7 +375,7 @@ void bmerge_r(int xlowIn, int xuppIn, int ilowIn, int iuppIn, int col, int thisg
     #define WRAP(x) (ENC2UTF8(x))
     DO(int tmp=StrCmp(ENC2UTF8(xcv[XIND(mid)]), ival), tmp<0, tmp>0, int, 0, 0, ival)
     // NA_STRING are allowed and joined to; does not do ENC2UTF8 again inside StrCmp
-    // TO DO: deal with mixed encodings and locale optionally; could StrCmp non-ascii in a thread-safe non-alloc manner
+    // todo: deal with mixed encodings and locale optionally; could StrCmp non-ascii in a thread-safe non-alloc manner
   } break;
   case REALSXP :
     if (INHERITS(xc, char_integer64)) {
@@ -391,7 +391,7 @@ void bmerge_r(int xlowIn, int xuppIn, int ilowIn, int iuppIn, int col, int thisg
       const double *icv = REAL(ic);
       const double *xcv = REAL(xc);
       const double ival = icv[ir];
-      const uint64_t ivalt = dtwiddle(ival); // TO: remove dtwiddle by dealing with NA, NaN, -Inf, +Inf up front
+      const uint64_t ivalt = dtwiddle(ival); // todo: remove dtwiddle by dealing with NA, NaN, -Inf, +Inf up front
       #undef ISNAT
       #undef WRAP
       #define ISNAT(x) (ISNAN(x))

src/data.table.h

@@ -70,7 +70,7 @@
 // always be checked in UTF8 locale. This seems to be the best fix Arun could think of to put the encoding issues to rest.
 // Since the if-statement will fail with the first condition check in "normal" ASCII cases, there shouldn't be huge penalty issues in
 // most cases. Fix for #66, #69, #469 and #1293
-// TODO: compare 1.9.6 performance with 1.9.7 with huge number of ASCII strings, and again after Jan 2018 when made macro.
+// todo: compare 1.9.6 performance with 1.9.7 with huge number of ASCII strings, and again after Jan 2018 when made macro.
 // Matt moved this to be macro in Jan 2018 so that branch can benefit from branch prediction too wherever used inside loops.
 // This IS_ASCII will dereference s and that cache fetch is the part that may bite more than the branch, though. Without a call to
 // to ENC2UTF as all, the pointer value can just be compared by the calling code without dereferencing it. It may still be worth

src/dogroups.c

@@ -92,11 +92,11 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
   double nextTime = (showProgress) ? startTime+3 : 0; // wait 3 seconds before printing progress
 
   defineVar(sym_BY, BY = PROTECT(allocVector(VECSXP, ngrpcols)), env); nprotect++;  // PROTECT for rchk
-  SEXP bynames = PROTECT(allocVector(STRSXP, ngrpcols));  nprotect++;   // TO DO: do we really need bynames, can we assign names afterwards in one step?
+  SEXP bynames = PROTECT(allocVector(STRSXP, ngrpcols));  nprotect++;   // todo: do we really need bynames, can we assign names afterwards in one step?
   for (int i=0; i<ngrpcols; ++i) {
     int j = INTEGER(grpcols)[i]-1;
     SET_VECTOR_ELT(BY, i, allocVector(TYPEOF(VECTOR_ELT(groups, j)),
-      nrowgroups ? 1 : 0)); // TODO: might be able to be 1 always but 0 when 'groups' are integer(0) seem sensible. #2440 was involved in the past.
+      nrowgroups ? 1 : 0)); // todo: might be able to be 1 always but 0 when 'groups' are integer(0) seem sensible. #2440 was involved in the past.
     // Fix for #36, by cols with attributes when also used in `j` lost the attribute.
     copyMostAttrib(VECTOR_ELT(groups, j), VECTOR_ELT(BY,i));  // not names, otherwise test 778 would fail
     SET_STRING_ELT(bynames, i, STRING_ELT(getAttrib(groups,R_NamesSymbol), j));
@@ -109,7 +109,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
   R_LockBinding(sym_BY, env);
   if (isNull(jiscols) && (length(bynames)!=length(groups) || length(bynames)!=length(grpcols)))
     error("!length(bynames)[%d]==length(groups)[%d]==length(grpcols)[%d]", length(bynames), length(groups), length(grpcols)); // # notranslate
-  // TO DO: check this check above.
+  // todo: check this check above.
 
   N =   PROTECT(findVar(install(".N"), env));   nprotect++; // PROTECT for rchk
   SET_TRUELENGTH(N, -1);  // marker for anySpecialStatic(); see its comments
@@ -183,7 +183,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
     // Previously had replaced (i>0 || !isNull(lhs)) with i>0 to fix #49
     // The above is now to fix #1993, see test 1746.
     // In cases were no i rows match, '|| estn>-1' ensures that the last empty group creates an empty result.
-    // TODO: revisit and tidy
+    // todo: revisit and tidy
 
     if (!isNull(lhs) &&
         (istarts[i] == NA_INTEGER ||
@@ -227,7 +227,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
         // Or in the words, this entire section, and this entire dogroups.c file, is now write-barrier compliant from v1.12.10
         // and we hope that reference counting on by default from R 4.0 will avoid costly gc()s.
       }
-      grpn = 1;  // it may not be 1 e.g. test 722. TODO: revisit.
+      grpn = 1;  // it may not be 1 e.g. test 722. todo: revisit.
       SETLENGTH(I, grpn);
       INTEGER(I)[0] = 0;
       for (int j=0; j<length(xSD); ++j) {
@@ -361,7 +361,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
           estn = 0;
           for (int j=0; j<LENGTH(lens); ++j) estn+=ilens[j];
           // Common case 2 : j returns as many rows as there are in the group (maybe a join)
-          // TO DO: this might over allocate if first group has 1 row and j is actually a single row aggregate
+          // todo: this might over allocate if first group has 1 row and j is actually a single row aggregate
           //        in cases when we're not sure could wait for the first few groups before deciding.
         } else  // maxn < grpn
           estn = maxn * LENGTH(starts);
@@ -463,7 +463,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
     if (firstalloc) {
       nprotect++;          //  remember the first jval. If we UNPROTECTed now, we'd unprotect
       firstalloc = FALSE;  //  ans. The first jval is needed to create the right size and type of ans.
-      // TO DO: could avoid this last 'if' by adding a dummy PROTECT after first alloc for this UNPROTECT(1) to do.
+      // todo: could avoid this last 'if' by adding a dummy PROTECT after first alloc for this UNPROTECT(1) to do.
     }
     else UNPROTECT(1);  // the jval. Don't want them to build up. The first jval can stay protected till the end ok.
   }
@@ -479,7 +479,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
       if (verbose) Rprintf(_("Wrote less rows (%d) than allocated (%d).\n"),ansloc,LENGTH(VECTOR_ELT(ans,0)));
       for (int j=0; j<length(ans); j++) SET_VECTOR_ELT(ans, j, growVector(VECTOR_ELT(ans,j), ansloc));
       // shrinks (misuse of word 'grow') back to the rows written, otherwise leak until ...
-      // ... TO DO: set truelength to LENGTH(VECTOR_ELT(ans,0)), length to ansloc and enhance finalizer to handle over-allocated rows.
+      // ... todo: set truelength to LENGTH(VECTOR_ELT(ans,0)), length to ansloc and enhance finalizer to handle over-allocated rows.
     }
   } else ans = R_NilValue;
   // Now reset length of .SD columns and .I to length of largest group, otherwise leak if the last group is smaller (often is).
@@ -533,7 +533,7 @@ SEXP growVector(SEXP x, const R_len_t newlen)
   SEXP newx;
   R_len_t len = length(x);
   if (isNull(x)) error(_("growVector passed NULL"));
-  PROTECT(newx = allocVector(TYPEOF(x), newlen));   // TO DO: R_realloc(?) here?
+  PROTECT(newx = allocVector(TYPEOF(x), newlen));   // todo: R_realloc(?) here?
   if (newlen < len) len=newlen;   // i.e. shrink
   if (!len) { // cannot memcpy invalid pointer, #6819
     keepattr(newx, x);

src/fastmean.c

@@ -61,7 +61,7 @@ SEXP fastmean(SEXP args)
       break;
     case REALSXP:
       for (int i=0; i<l; ++i) {
-        if(ISNAN(REAL(x)[i])) continue;  // TO DO: could drop this line and let NA propagate?
+        if(ISNAN(REAL(x)[i])) continue;  // todo: could drop this line and let NA propagate?
         s += REAL(x)[i];
         n++;
       }

src/fcast.c

@@ -3,7 +3,7 @@
 // #include <signal.h> // the debugging machinery + breakpoint aidee
 // raise(SIGINT);
 
-// TO DO: margins
+// todo: margins
 SEXP fcast(SEXP lhs, SEXP val, SEXP nrowArg, SEXP ncolArg, SEXP idxArg, SEXP fill, SEXP fill_d, SEXP is_agg, SEXP some_fillArg) {
   int nrows=INTEGER(nrowArg)[0], ncols=INTEGER(ncolArg)[0];
   int nlhs=length(lhs), nval=length(val), *idx = INTEGER(idxArg);
@@ -127,7 +127,7 @@ SEXP fcast(SEXP lhs, SEXP val, SEXP nrowArg, SEXP ncolArg, SEXP idxArg, SEXP fil
 //   if (TYPEOF(env) != ENVSXP) error(_("Argument 'env' to (data.table internals) 'cast_order' must be an environment"));
 //   if (TYPEOF(v) == VECSXP) len = length(VECTOR_ELT(v, 0));
 //   else len = length(v);
-//   PROTECT(call = lang2(install("forder"), v)); // TODO: save the 'eval' by calling directly the C-function.
+//   PROTECT(call = lang2(install("forder"), v)); // todo: save the 'eval' by calling directly the C-function.
 //   ans = PROTECT(eval(call, env));
 //   if (length(ans) == 0) { // forder returns integer(0) if already sorted
 //     UNPROTECT(1); // ans