search for: maxeltsize

...(triggered by substr()): I assume that the helper function AllocBuffer() shall facilitate an economic memory management. But the use of realloc() in the else-branch does not conform to ANSI and may hit you with certain compilers. When called with len<0 the code is assumed to re-size buff to MAXELTSIZE: realloc(buff, 0); buff = (char *) realloc(buff, MAXELTSIZE); bufsize = MAXELTSIZE; But in the first call of realloc() it is perfectly legal to return a new pointer (which is thrown away here), and then using (a possibly invalid) buff from earlier times may (and did for me) crash your progr...

...(triggered by substr()): I assume that the helper function AllocBuffer() shall facilitate an economic memory management. But the use of realloc() in the else-branch does not conform to ANSI and may hit you with certain compilers. When called with len<0 the code is assumed to re-size buff to MAXELTSIZE: realloc(buff, 0); buff = (char *) realloc(buff, MAXELTSIZE); bufsize = MAXELTSIZE; But in the first call of realloc() it is perfectly legal to return a new pointer (which is thrown away here), and then using (a possibly invalid) buff from earlier times may (and did for me) crash your progr...

Hi, (First, apology for my earlier incorrectly addressed "subscribe" post.) Can somebody tell me what exactly is going on below. Basically, I am running into some kind of "string truncation" problem when I try to get a substring starting past the 8192nd character (see sample session below). There doesn't appear to be any problem creating the string, and nchar()

...ex: src/main/dcf.c =================================================================== --- src/main/dcf.c (revision 69404) +++ src/main/dcf.c (working copy) @@ -42,12 +42,12 @@ /* Use R_alloc as this might get interrupted */ static char *Rconn_getline2(Rconnection con) { - int c, bufsize = MAXELTSIZE, nbuf = -1; + int c, bufsize = MAXELTSIZE, nbuf = 0; char *buf; buf = R_alloc(bufsize, sizeof(char)); while((c = Rconn_fgetc(con)) != R_EOF) { - if(nbuf+2 >= bufsize) { // allow for terminator below + if(nbuf+1 >= bufsize) { // allow for terminator below bufsize *...

...s which have become horribly long during the simulation -- on the order of 20K characters! save() is perfectly happy to write these variable names out, but load() segfaults because the "InString" family of functions use fixed size buffer but don't check for overflow! The buffer is MAXELTSIZE bytes, defined in $RHOME/src/inclide/Defn.h as 512. As you would expect, reading a 20K object into a 512 byte buffer can really mess things up. As noted in the comments of saveload.c, /* FIXME : the fixed size buffer here is an abomination */ but that's not as bad as failing to check for o...

...s which have become horribly long during the simulation -- on the order of 20K characters! save() is perfectly happy to write these variable names out, but load() segfaults because the "InString" family of functions use fixed size buffer but don't check for overflow! The buffer is MAXELTSIZE bytes, defined in $RHOME/src/inclide/Defn.h as 512. As you would expect, reading a 20K object into a 512 byte buffer can really mess things up. As noted in the comments of saveload.c, /* FIXME : the fixed size buffer here is an abomination */ but that's not as bad as failing to check for o...

...file didn't have the newline char. For example, file like this: 23 3 31 2 24 1<EOF> Here is a fix. --- R-0.65.1/src/main/scan.c.orig Wed Sep 29 11:11:45 1999 +++ R-0.65.1/src/main/scan.c Fri Oct 29 17:34:22 1999 @@ -124,7 +124,7 @@ if (bufp >= &buffer[MAXELTSIZE - 2]) continue; *bufp++ = c; - } while (!isspace(c = scanchar()) && c != R_EOF); + } while ((c = scanchar()) != R_EOF && !isspace(c)); while (c==' ' || c=='\t') c=scanchar();...

...ap tibco.com ------------------------------------------------------------------- Index: sprintf.c =================================================================== --- sprintf.c (revision 48148) +++ sprintf.c (working copy) @@ -79,13 +79,13 @@ static R_StringBuffer outbuff = {NULL, 0, MAXELTSIZE}; Rboolean use_UTF8; - outputString = R_AllocStringBuffer(0, &outbuff); - /* grab the format string */ nargs = length(args); format = CAR(args); - if (!isString(format) || length(format) == 0) + if (!isString(format)) error(_("'fmt' is not a no...

...=================================================== > --- src/main/dcf.c (revision 69404) > +++ src/main/dcf.c (working copy) > @@ -42,12 +42,12 @@ > /* Use R_alloc as this might get interrupted */ > static char *Rconn_getline2(Rconnection con) > { > - int c, bufsize = MAXELTSIZE, nbuf = -1; > + int c, bufsize = MAXELTSIZE, nbuf = 0; > char *buf; > > buf = R_alloc(bufsize, sizeof(char)); > while((c = Rconn_fgetc(con)) != R_EOF) { > - if(nbuf+2 >= bufsize) { // allow for terminator below > + if(nbuf+1 >= bufsize) { // allow fo...

Here's an update: I checked the ChangeLog for R, and it seems like readDCF was changed in 3.0.2. I went on a whim and copied src/main/dcf.c from R 2.15.3 over to 3.2.2, and R compiled fine and install.packages now work for me. This is probably not ideal, but it at least makes R usable on AIX for me. Would definitely like to help figure out what's wrong with the new dcf.c on AIX.

Hi, I am trying to parse a large amount of text using gregexpr(). Unfortunately, I get an "input buffer overflow" message when I attempt that with too large an amount of text. The error messages occurs before the parsing. The problem is that I cannot assign the text to a variable (an object) if the text is too large. This problem has been mentioned before, which I found using the

Hi, I'm attempting to "glm" a formula - something that's not caused problems in the past. I've used formulas of the form formula( "dependant-variable~independant-variables" ) where the independant variable string is of the form: "indvar1+indvar2+...+indvarN" Now, however, our independant variable strings are quite long (hundreds of

...ution or not. I located the following native do_readln() function in src/main/scan.c that is called by readline(): SEXP attribute_hidden do_readln(SEXP call, SEXP op, SEXP args, SEXP rho) { ... while ((c = ConsoleGetchar())!= '\n' && c != R_EOF) { if (bufp >= &buffer[MAXELTSIZE - 2]) continue; *bufp++ = c; } ... } with ConsoleGetchar(): /* used by readline() and menu() */ static int ConsoleGetchar(void) { if (--ConsoleBufCnt < 0) { ConsoleBuf[CONSOLE_BUFFER_SIZE] = '\0'; if (R_ReadConsole(ConsolePrompt, ConsoleBuf, CONSOLE_BUFFER_SIZE, 0) ==...

Dear R developers, I have found the following bug with readline() in R 0.63.3: if you execute the menu-function and then the readline() function, then readline() prompts "Selection:" > a <- readline() hello > a [1] "hallo" > a <- menu(c("a", "b"), title="bitte:") bitte: 1:a 2:b Selection: 2 > a <- readline() Selection: