This is the change file to CWEB's COMMON for porting to Macintoshes. No changes to CTANGLE or CWEAVE are needed. (Contributed 13 Oct 2000 by AndPio@aol.com; slightly edited by Don Knuth) @x in limbo, change the title page document to specify Mac version \centerline{(Version 4.12)} @y \centerline{(Version 4.12 for MacOS)} @z @x section 23: Make input_ln accept \n, \r, \n\r, or \r\n as line endings @ In the unlikely event that your standard I/O library does not support |feof| and |getc| you may have to change things here. @^system dependencies@> @c static boolean input_ln( /* copies a line into |buffer| or returns |false| */ FILE *fp) /* what file to read from */ { int c=EOF; /* character read; initialized so some compilers won't complain */ char *k; /* where next character goes */ if (feof(fp)) return false; /* we have hit end-of-file */ limit = k = buffer; /* beginning of buffer */ while (k<=buffer_end && (c=getc(fp)) != EOF && c!='\n') if ((*(k++) = c) != ' ') limit = k; if (k>buffer_end) { while ((c=getc(fp))!=EOF && c!='\n'); /* discard rest of line */ loc=buffer; err_print("! Input line too long"); @.Input line too long@> } if (c==EOF && limit==buffer) return false; /* there was nothing after the last newline */ return true; } @y @ In the unlikely event that your standard I/O library does not support |feof|, |getc|, and |ungetc| you may have to change things here. This |input_ln| function accepts |"\n"|, |"\r"|, |"\n\r"| and |"\r\n"| as line endings, so that \.{CWEB} will works with ASCII files stored in \UNIX/, {\mc DOS} or {\mc MAC} format. @^system dependencies@> @c static boolean input_ln( /* copies a line into |buffer| or returns |false| */ FILE *fp) /* what file to read from */ { int c=EOF; /* character read; initialized so some compilers won't complain */ char *k; /* where next character goes */ if (feof(fp)) return false; /* we have hit end-of-file */ limit = k = buffer; /* beginning of buffer */ while (true) { c = getc(fp); if (c==EOF) return limit!=buffer; /* |false|, if there was nothing after the last newline */ else if (c=='\n' || c=='\r') { /* we have hit end-of-line */ int d = getc(fp); if (c+d!='\n'+'\r') /* no combination |"\n\r"| or |"\r\n"| */ ungetc(d,fp); return true; } else if (k>buffer_end) { while ((c=getc(fp))!=EOF && c!='\n' && c!='\r'); /* discard rest of line */ return true; @.Input line too long@> } else if ((*(k++)=c) != ' ') limit = k; } } @z @x section 27, simply return if no change file was specified change_limit=change_buffer; /* this value is used if the change file ends */ @@; @y change_limit=change_buffer; /* this value is used if the change file ends */ if (change_file_name[0] == '\0') /* no change file specified */ return; /* so we have reached the end of that file */ @@; @z @x section 36, declare colon as Mac's path separator (Colon-separated paths are not supported.) The remainder of the \.{@@i} line after the file name is ignored. @y (Colon-separated path alternatives in the style of \UNIX/ or Kpathsea are not supported. On a Macintosh, colons are used to separate the names on different levels of a path.) The remainder of the \.{@@i} line after the file name is ignored. @d PATH_SEP ':' /* MacOS pathname separator */ @^system dependencies@> @z @x section 36, use the path separator constant cur_file_name[l]='/'; /* \UNIX/ pathname separator */ @y cur_file_name[l]=PATH_SEP; /* pathname separator */ @z @x section 41, don't try to open a change file if none was specified if ((change_file=fopen(change_file_name,"r"))==NULL) fatal("! Cannot open change file ", change_file_name); @y if (change_file_name[0] == '\0') /* no change file specified */ change_file = NULL; /* reset at least the |change_file| */ else if ((change_file=fopen(change_file_name,"r"))==NULL) fatal("! Cannot open change file ", change_file_name); @z @x section 75, explain the convention for omitted change files An omitted change file argument means that |"/dev/null"| should be used, @y An omitted change file argument means that no change file should be used, @z @x section 75, make change file name empty when it is unspecified strcpy(change_file_name,"/dev/null"); @y change_file_name[0]='\0'; /* empty string */ @z @x section 75, use the Metrowerks |ccommand| to access command lines while (--argc > 0) { @y argc = ccommand (&argv); /* use Mac interface to command line */ @^system dependencies@> while (--argc > 0) { @z @x section 75, use the path separator constant else if (*s=='/') dot_pos=NULL,name_pos=++s; @y else if (*s==PATH_SEP) dot_pos=NULL,name_pos=++s; @z @x section 85, insert an extra module before the index @* Index. @y by putting the new module here, we preserve all the previous section numbers @ We assume an interface to \CEE/ command-line emulation as supplied by the |ccommand| function of Metrowerks CodeWarrior, as defined in the header file \.{console.h}. @= #include @^system dependencies@> @* Index. @z