/* * C P P 6 . C * S u p p o r t R o u t i n e s * * Edit History * 25-May-84 MM Added 8-bit support to type table. * 30-May-84 ARF sharp() should output filename in quotes * 02-Aug-84 MM Newline and #line hacking. sharp() now in cpp1.c * 31-Aug-84 MM USENET net.sources release * 11-Sep-84 ado/MM Keepcomments, also line number pathological * 12-Sep-84 ado/MM bug if comment changes to space and we unget later. * 03-Oct-84 gkr/MM Fixed scannumber bug for '.e' (as in struct.element). * 04-Oct-84 MM Added ungetstring() for token concatenation * 08-Oct-84 MM Yet another attack on number scanning * 31-Oct-84 ado Parameterized $ in identifiers * 2-Nov-84 MM Token concatenation is messier than I thought * 6-Dec-84 MM \ is everywhere invisible. * 28-Mar-85 MM Token concatenation redone again. * 29-Mar-85 ado/MM Trigraphs, Fixed bug with macros with / at * the end: #define foo /$ ... $/ * 2-Apr-85 MM Hacked trigraph code. * 30-May-85 ado Fixed bug in scannumber sign processing */ #include #include #include "cppdef.h" #include "cpp.h" /* * skipnl() skips over input text to the end of the line. * skipws() skips over "whitespace" (spaces or tabs), but * not skip over the end of the line. It skips over * TOK_SEP, however (though that shouldn't happen). * scanid() reads the next token (C identifier) into token[]. * The caller has already read the first character of * the identifier. Unlike macroid(), the token is * never expanded. * macroid() reads the next token (C identifier) into token[]. * If it is a #defined macro, it is expanded, and * macroid() returns TRUE, otherwise, FALSE. * catenate() Does the dirty work of token concatenation, TRUE if it did. * scanstring() Reads a string from the input stream, calling * a user-supplied function for each character. * This function may be output() to write the * string to the output file, or save() to save * the string in the work buffer. * scannumber() Reads a C numeric constant from the input stream, * calling the user-supplied function for each * character. (output() or save() as noted above.) * save() Save one character in the work[] buffer. * savestring() Saves a string in malloc() memory. * getfile() Initialize a new FILEINFO structure, called when * #include opens a new file, or a macro is to be * expanded. * getmem() Get a specified number of bytes from malloc memory. * output() Write one character to stdout (calling putchar) -- * implemented as a function so its address may be * passed to scanstring() and scannumber(). * lookid() Scans the next token (identifier) from the input * stream. Looks for it in the #defined symbol table. * Returns a pointer to the definition, if found, or NULL * if not present. The identifier is stored in token[]. * defnedel() Define enter/delete subroutine. Updates the * symbol table. * get() Read the next byte from the current input stream, * handling end of (macro/file) input and embedded * comments appropriately. Note that the global * instring is -- essentially -- a parameter to get(). * cget() Like get(), but skip over TOK_SEP. * unget() Push last gotten character back on the input stream. * cerror(), cwarn(), cfatal(), cierror(), ciwarn() * These routines format an print messages to the user. * cerror & cwarn take a format and a single string argument. * cierror & ciwarn take a format and a single int (char) argument. * cfatal takes a format and a single string argument. */ /* * This table must be rewritten for a non-Ascii machine. * * Note that several "non-visible" characters have special meaning: * Hex 1C ST_QUOTE -- magic " after # stringizing. * Hex 1D DEF_MAGIC -- a flag to prevent #define recursion. * Hex 1E TOK_SEP -- a delimiter for token concatenation * Hex 1F COM_SEP -- a zero-width whitespace for comment concatenation */ #if ST_QUOTE != 0x1C || DEF_MAGIC != 0x1D || TOK_SEP != 0x1E || COM_SEP != 0x1F << error type table isn't correct >> #endif #if OK_DOLLAR #define DOL LET #else #define DOL 000 #endif char type[256] = { /* Character type codes Hex */ END, 000, 000, 000, 000, 000, 000, 000, /* 00 */ 000, SPA, 000, 000, 000, 000, 000, 000, /* 08 */ 000, 000, 000, 000, 000, 000, 000, 000, /* 10 */ 000, 000, 000, 000, 000, LET, 000, SPA, /* 18 */ SPA,OP_NOT, QUO, 000, DOL,OP_MOD,OP_AND, QUO, /* 20 !"#$%&' */ OP_LPA,OP_RPA,OP_MUL,OP_ADD, 000,OP_SUB, DOT,OP_DIV, /* 28 ()*+,-./ */ DIG, DIG, DIG, DIG, DIG, DIG, DIG, DIG, /* 30 01234567 */ DIG, DIG,OP_COL, 000, OP_LT, OP_EQ, OP_GT,OP_QUE, /* 38 89:;<=>? */ 000, LET, LET, LET, LET, LET, LET, LET, /* 40 @ABCDEFG */ LET, LET, LET, LET, LET, LET, LET, LET, /* 48 HIJKLMNO */ LET, LET, LET, LET, LET, LET, LET, LET, /* 50 PQRSTUVW */ LET, LET, LET, 000, BSH, 000,OP_XOR, LET, /* 58 XYZ[\]^_ */ 000, LET, LET, LET, LET, LET, LET, LET, /* 60 `abcdefg */ LET, LET, LET, LET, LET, LET, LET, LET, /* 68 hijklmno */ LET, LET, LET, LET, LET, LET, LET, LET, /* 70 pqrstuvw */ LET, LET, LET, 000, OP_OR, 000,OP_NOT, 000, /* 78 xyz{|}~ */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ 000, 000, 000, 000, 000, 000, 000, 000, /* 80 .. FF */ }; skipnl() /* * Skip to the end of the current input line. */ { register int c; do { /* Skip to newline */ c = get(); } while (c != '\n' && c != EOF_CHAR); } int skipws() /* * Skip over whitespace */ { register int c; do { /* Skip whitespace */ c = get(); #if COMMENT_INVISIBLE } while (type[c] == SPA || c == COM_SEP); #else } while (type[c] == SPA); #endif return (c); } scanid(c) register int c; /* First char of id */ /* * Get the next token (an id) into the token buffer. * Note: this code is duplicated in lookid(). * Change one, change both. */ { register char *bp; if (c == DEF_MAGIC) /* Eat the magic token */ c = get(); /* undefiner. */ bp = token; do { if (bp < &token[IDMAX]) /* token dim is IDMAX+1 */ *bp++ = c; c = get(); } while (type[c] == LET || type[c] == DIG); unget(); *bp = EOS; } int macroid(c) register int c; /* * If c is a letter, scan the id. if it's #defined, expand it and scan * the next character and try again. * * Else, return the character. If type[c] is a LET, the token is in token. */ { register DEFBUF *dp; if (infile != NULL && infile->fp != NULL) recursion = 0; while (type[c] == LET && (dp = lookid(c)) != NULL) { expand(dp); c = get(); } return (c); } int catenate() /* * A token was just read (via macroid). * If cpp was compiled for no token concatenation or concatenation * without reexpansion of the new token, return FALSE. * Else, we plan to macro-expand the new token. If the next * character is TOK_SEP, concatenate the next token and return TRUE * -- which should recall macroid after refreshing macroid's argument. * If it is not TOK_SEP, unget() the character and return FALSE. */ { #if OK_CONCAT == CON_EXPAND register int c; register char *token1; extern int save(); extern char *appendstring(); if (get() != TOK_SEP) { /* Token concatenation */ unget(); return (FALSE); } else { /* * The input stream is (had better be) * # stuff #, where stuff is initially something * to be concatenated. */ token1 = savestring(token); /* Save first token */ while ((c = get()) != TOK_SEP) { /* Off we go. */ if (c == EOF_CHAR) cfatal("EOF in token concatenation to \"%s\"", token1); c = macroid(c); /* Scan next token */ switch(type[c]) { /* What was it? */ case LET: /* An identifier, ... */ token1 = appendstring(token1, token); break; case DIG: /* A digit string */ case DOT: /* Other flavor digit */ workp = work; scannumber(c, save); *workp = EOS; token1 = appendstring(token1, work); break; default: /* Who knows */ work[0] = c; work[1] = EOS; token1 = appendstring(token1, work); break; } } ungetstring(token1); /* New thing to do */ free(token1); /* Release scratch */ return (TRUE); } #else return (FALSE); /* Not supported */ #endif } #if OK_CONCAT == CON_EXPAND FILE_LOCAL char * appendstring(token1, text) char *token1; /* In malloc storage */ char *text; /* Append it to token1 */ { extern char *realloc(); if ((token1 = realloc(token1, (unsigned) (strlen(token1) + strlen(text) + 1))) == NULL) cfatal("Out of memory concatenating tokens", NULLST); strcat(token1, text); return (token1); } #endif int scanstring(delim, outfun) register int delim; /* ' or " */ int (*outfun)(); /* Output function */ /* * Scan off a string. Warning if terminated by newline or EOF. * outfun() outputs the character -- to a buffer if in a macro. * TRUE if ok, FALSE if error. */ { register int c; instring = TRUE; /* Don't strip comments */ (*outfun)(delim); while ((c = get()) != delim && c != '\n' && c != EOF_CHAR) { (*outfun)(c); if (c == '\\') (*outfun)(get()); } instring = FALSE; if (c == delim) { (*outfun)(c); return (TRUE); } else { cerror("Unterminated string", NULLST); unget(); return (FALSE); } } scannumber(c, outfun) register int c; /* First char of number */ register int (*outfun)(); /* Output/store func */ /* * Process a number. We know that c is from 0 to 9 or dot. * Algorithm from Dave Conroy's Decus C. */ { register int radix; /* 8, 10, or 16 */ int expseen; /* 'e' seen in floater */ int octal89; /* For bad octal test */ int dotflag; /* TRUE if '.' was seen */ expseen = FALSE; /* No exponent seen yet */ octal89 = FALSE; /* No bad octal yet */ radix = 10; /* Assume decimal */ if ((dotflag = (c == '.')) != FALSE) { /* . something? */ (*outfun)('.'); /* Always out the dot */ if (type[(c = get())] != DIG) { /* If not a float numb, */ unget(); /* Rescan strange char */ return; /* All done for now */ } } /* End of float test */ else if (c == '0') { /* Octal or hex? */ (*outfun)(c); /* Stuff initial zero */ radix = 8; /* Assume it's octal */ c = get(); /* Look for an 'x' */ if (c == 'x' || c == 'X') { /* Did we get one? */ radix = 16; /* Remember new radix */ (*outfun)(c); /* Stuff the 'x' */ c = get(); /* Get next character */ } } for (;;) { /* Process curr. char. */ /* * Note that this algorithm accepts "012e4" and "03.4" * as legitimate floating-point numbers. */ if (radix != 16 && (c == 'e' || c == 'E')) { if (expseen) /* Already saw 'E'? */ break; /* Exit loop, bad nbr. */ expseen = TRUE; /* Set exponent seen */ radix = 10; /* Decimal exponent */ (*outfun)(c); /* Output the 'e' */ if ((c = get()) != '+' && c != '-') continue; } else if (radix != 16 && c == '.') { if (dotflag) /* Saw dot already? */ break; /* Exit loop, two dots */ dotflag = TRUE; /* Remember the dot */ radix = 10; /* Decimal fraction */ } else { /* Check the digit */ switch (c) { case '8': case '9': /* Sometimes wrong */ octal89 = TRUE; /* Do check later */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': break; /* Always ok */ case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': if (radix == 16) /* Alpha's are ok only */ break; /* if reading hex. */ default: /* At number end */ goto done; /* Break from for loop */ } /* End of switch */ } /* End general case */ (*outfun)(c); /* Accept the character */ c = get(); /* Read another char */ } /* End of scan loop */ /* * When we break out of the scan loop, c contains the first * character (maybe) not in the number. If the number is an * integer, allow a trailing 'L' for long and/or a trailing 'U' * for unsigned. If not those, push the trailing character back * on the input stream. Floating point numbers accept a trailing * 'L' for "long double" or a trailing 'F' for explicit float. */ done: if (dotflag || expseen) { /* Floating point? */ switch (c) { case 'l': case 'L': case 'f': case 'F': (*outfun)(c); /* Output the trailer */ c = get(); /* Ungotten later */ break; default: /* Others are ignored */ break; } } else { /* Else it's an integer */ /* * We know that dotflag and expseen are both zero, now: * dotflag signals "saw 'L'", and * expseen signals "saw 'U'". * We assume that 12F is not a floating constant. */ for (;;) { switch (c) { case 'l': case 'L': if (dotflag) goto nomore; dotflag = TRUE; break; case 'u': case 'U': if (expseen) goto nomore; expseen = TRUE; break; default: goto nomore; } (*outfun)(c); /* Got 'L' or 'U'. */ c = get(); /* Look at next, too. */ } } nomore: unget(); /* Not part of a number */ if (octal89 && radix == 8) cwarn("Illegal digit in octal number", NULLST); } save(c) register int c; { if (workp >= &work[NWORK]) cfatal("Work buffer overflow", NULLST); else *workp++ = c; } char * savestring(text) char *text; /* * Store a string into free memory. */ { register char *result; result = getmem(strlen(text) + 1); strcpy(result, text); return (result); } FILEINFO * getfile(bufsize, name) int bufsize; /* Line or define buffer size */ char *name; /* File or macro name string */ /* * Common FILEINFO buffer initialization for a new file or macro. */ { register FILEINFO *file; file = (FILEINFO *) getmem(sizeof (FILEINFO) + bufsize); file->parent = infile; /* Chain files together */ file->fp = NULL; /* No file yet */ file->filename = savestring(name); /* Save file/macro name */ file->progname = NULL; /* No #line seen yet */ file->unrecur = 0; /* No macro fixup */ file->bptr = file->buffer; /* Initialize line ptr */ file->buffer[0] = EOS; /* Force first read */ file->line = 0; /* (Not used just yet) */ if (infile != NULL) /* If #include file */ infile->line = line; /* Save current line */ infile = file; /* New current file */ return (file); /* All done. */ } char * getmem(size) int size; /* * Get a block of free memory. */ { register char *result; extern char *malloc(); if ((result = malloc((unsigned) size)) == NULL) cfatal("Out of memory", NULLST); return (result); } /* * C P P S y m b o l T a b l e s */ /* * SBSIZE defines the number of hash-table slots for the symbol table. * It must be a power of 2. */ #ifndef SBSIZE #define SBSIZE 64 #endif #define SBMASK (SBSIZE - 1) #if (SBSIZE ^ SBMASK) != ((SBSIZE * 2) - 1) << error, SBSIZE must be a power of 2 >> #endif static DEFBUF *symtab[SBSIZE]; /* Symbol table queue headers */ DEFBUF * lookid(c) int c; /* First character of token */ /* * Look for the next token in the symbol table. Returns token in "token". * If found, returns the table pointer; Else returns NULL. */ { register int nhash; register DEFBUF *dp; register char *np; int temp; int isrecurse; /* For #define foo foo */ np = token; nhash = 0; if ((isrecurse = (c == DEF_MAGIC))) /* If recursive macro */ c = get(); /* hack, skip DEF_MAGIC */ do { if (np < &token[IDMAX]) { /* token dim is IDMAX+1 */ *np++ = c; /* Store token byte */ nhash += c; /* Update hash value */ } c = get(); /* And get another byte */ } while (type[c] == LET || type[c] == DIG); unget(); /* Rescan terminator */ *np = EOS; /* Terminate token */ if (isrecurse) /* Recursive definition */ return (NULL); /* undefined just now */ nhash += (np - token); /* Fix hash value */ dp = symtab[nhash & SBMASK]; /* Starting bucket */ while (dp != (DEFBUF *) NULL) { /* Search symbol table */ if (dp->hash == nhash /* Fast precheck */ && (temp = strcmp(dp->name, token)) >= 0) break; dp = dp->link; /* Nope, try next one */ } return ((temp == 0) ? dp : NULL); } DEFBUF * defendel(name, delete) char *name; int delete; /* TRUE to delete a symbol */ /* * Enter this name in the lookup table (delete = FALSE) * or delete this name (delete = TRUE). * Returns a pointer to the define block (delete = FALSE) * Returns NULL if the symbol wasn't defined (delete = TRUE). */ { register DEFBUF *dp; register DEFBUF **prevp; register char *np; int nhash; int temp; int size; for (nhash = 0, np = name; *np != EOS;) nhash += *np++; size = (np - name); nhash += size; prevp = &symtab[nhash & SBMASK]; while ((dp = *prevp) != (DEFBUF *) NULL) { if (dp->hash == nhash && (temp = strcmp(dp->name, name)) >= 0) { if (temp > 0) dp = NULL; /* Not found */ else { *prevp = dp->link; /* Found, unlink and */ if (dp->repl != NULL) /* Free the replacement */ free(dp->repl); /* if any, and then */ free((char *) dp); /* Free the symbol */ } break; } prevp = &dp->link; } if (!delete) { dp = (DEFBUF *) getmem(sizeof (DEFBUF) + size); dp->link = *prevp; *prevp = dp; dp->hash = nhash; dp->repl = NULL; dp->nargs = 0; strcpy(dp->name, name); } return (dp); } /* * G E T */ int get() /* * Return the next character from a macro or the current file. * Handle end of file from #include files. */ { register int c; register FILEINFO *file; register int popped; /* Recursion fixup */ popped = 0; get_from_file: if ((file = infile) == NULL) return (EOF_CHAR); newline: #if DEBUG if (debug > 2) { printf("get(%s), recursion %d, line %d, bptr = %d, buffer \"%s\"\n", file->filename, recursion, line, file->bptr - file->buffer, file->buffer); dumpunget("get entrance"); } #endif /* * Read a character from the current input line or macro. * At EOS, either finish the current macro (freeing temp. * storage) or read another line from the current input file. * At EOF, exit the current file (#include) or, at EOF from * the cpp input file, return EOF_CHAR to finish processing. */ if ((c = *file->bptr++ & 0xFF) == EOS) { /* * Nothing in current line or macro. Get next line (if * input from a file), or do end of file/macro processing. * In the latter case, jump back to restart from the top. */ if (file->fp == NULL) { /* NULL if macro */ popped++; recursion -= file->unrecur; if (recursion < 0) recursion = 0; infile = file->parent; /* Unwind file chain */ } else { /* Else get from a file */ if ((file->bptr = fgets(file->buffer, NBUFF, file->fp)) != NULL) { #if DEBUG if (debug > 1) { /* Dump it to stdout */ printf("\n#line %d (%s), %s", line, file->filename, file->buffer); } #endif #if OK_TRIGRAPH if (tflag) trigraph(file->buffer); #endif goto newline; /* process the line */ } else { fclose(file->fp); /* Close finished file */ if ((infile = file->parent) != NULL) { /* * There is an "ungotten" newline in the current * infile buffer (set there by doinclude() in * cpp1.c). Thus, we know that the mainline code * is skipping over blank lines and will do a * #line at its convenience. */ wrongline = TRUE; /* Need a #line now */ } } } /* * Free up space used by the (finished) file or macro and * restart input from the parent file/macro, if any. */ free(file->filename); /* Free name and */ if (file->progname != NULL) /* if a #line was seen, */ free(file->progname); /* free it, too. */ free((char *) file); /* Free file space */ if (infile == NULL) /* If at end of file */ return (EOF_CHAR); /* Return end of file */ line = infile->line; /* Reset line number */ goto get_from_file; /* Get from the top. */ } /* * Common processing for the new character. */ if (c == DEF_MAGIC && file->fp != NULL) /* Don't allow delete */ goto newline; /* from a file */ if (file->parent != NULL) { /* Macro or #include */ if (popped != 0) file->parent->unrecur += popped; else { recursion -= file->parent->unrecur; if (recursion < 0) recursion = 0; file->parent->unrecur = 0; } } if (c == '\n') /* Maintain current */ ++line; /* line counter */ if (instring) /* Strings just return */ return (c); /* the character. */ else if (c == '/' && *file->bptr != EOS) { /* Comment? */ instring = TRUE; /* So get() won't loop */ if ((c = get()) != '*') { /* Next byte '*'? */ instring = FALSE; /* Nope, no comment */ unget(); /* Push the char. back */ return ('/'); /* Return the slash */ } if (keepcomments) { /* If writing comments */ putchar('/'); /* Write out the */ putchar('*'); /* initializer */ } for (;;) { /* Eat a comment */ c = get(); test: if (keepcomments && c != EOF_CHAR) cput(c); switch (c) { case EOF_CHAR: cerror("EOF in comment", NULLST); return (EOF_CHAR); case '/': if ((c = get()) != '*') /* Don't let comments */ goto test; /* Nest. */ cwarn("Nested comments", NULLST); /* Fall into * stuff */ case '*': if ((c = get()) != '/') /* If comment doesn't */ goto test; /* end, look at next */ instring = FALSE; /* End of comment, */ if (keepcomments) { /* Put out the comment */ cput(c); /* terminator, too */ } /* * A comment is syntactically "whitespace" -- * however, there are certain strange sequences * such as * #define foo(x) (something) * foo|* comment *|(123) * these are '/' ^ ^ * where just returning space (or COM_SEP) will cause * problems. This can be "fixed" by overwriting the * '/' in the input line buffer with ' ' (or COM_SEP) * but that may mess up an error message. * So, we peek ahead -- if the next character is * "whitespace" we just get another character, if not, * we modify the buffer. All in the name of purity. */ if (*file->bptr == '\n' || type[*file->bptr & 0xFF] == SPA) goto newline; #if COMMENT_INVISIBLE /* * Return magic (old-fashioned) syntactic space. */ return ((file->bptr[-1] = COM_SEP)); #else return ((file->bptr[-1] = ' ')); #endif case '\n': /* we'll need a #line */ if (!keepcomments) wrongline = TRUE; /* later... */ default: /* Anything else is */ break; /* Just a character */ } /* End switch */ } /* End comment loop */ } /* End if in comment */ else if (!inmacro && c == '\\') { /* If backslash, peek */ if ((c = get()) == '\n') { /* for a . If so, */ wrongline = TRUE; goto newline; } else { /* Backslash anything */ unget(); /* Get it later */ return ('\\'); /* Return the backslash */ } } else if (c == '\f' || c == VT) /* Form Feed, Vertical */ c = ' '; /* Tab are whitespace */ return (c); /* Just return the char */ } #if OK_TRIGRAPH #define TRIOFFSET 9 static char tritext[] = "=(/)'-\0#[\\]^{|}~"; /* ^ ^ * +----------+ * this becomes this */ trigraph(in) register char *in; /* * Perform in-place trigraph replacement on an input text line. * This was added to the Draft Standard. In an input text * line, the sequence ?? is transformed to a character * (which might not appear on the input keyboard.) * There are problems with trigraphs, and this code may not last long. */ { register char *tp; extern char *strchr(); while ((in = strchr(in, '?')) != NULLST) { if (*++in != '?') continue; while (*++in == '?') ; if ((tp = strchr(tritext, *in)) == NULLST) continue; in[-2] = tp[TRIOFFSET]; in--; strcpy(in, in + 2); } } #endif unget() /* * Backup the pointer to reread the last character. Fatal error * (code bug) if we backup too far. unget() may be called, * without problems, at end of file. Only one character may * be ungotten. If you need to unget more, call ungetstring(). */ { register FILEINFO *file; if ((file = infile) == NULL) return; /* Unget after EOF */ if (--file->bptr < file->buffer) cfatal("Too much pushback", NULLST); if (*file->bptr == '\n') /* Ungetting a newline? */ --line; /* Unget the line number, too */ #if DEBUG if (debug > 2) dumpunget("after unget"); #endif } ungetstring(text) char *text; /* * Push a string back on the input stream. This is done by treating * the text as if it were a macro. */ { register FILEINFO *file; extern FILEINFO *getfile(); file = getfile(strlen(text) + 1, ""); strcpy(file->buffer, text); } int cget() /* * Get one character, absorb "funny space" after comments or * token concatenation */ { register int c; do { c = get(); #if COMMENT_INVISIBLE || CON_NOEXPAND } while (c == TOK_SEP || c == COM_SEP); #else } while (c == TOK_SEP); #endif return (c); } /* * Error messages and other hacks. The first byte of severity * is 'S' for string arguments and 'I' for int arguments. This * is needed for portability with machines that have int's that * are shorter than char *'s. */ static domsg(severity, format, arg) char *severity; /* "Error", "Warning", "Fatal" */ char *format; /* Format for the error message */ char *arg; /* Something for the message */ /* * Print filenames, macro names, and line numbers for error messages. */ { register char *tp; register FILEINFO *file; fprintf(stderr, "%sline %d, %s: ", MSG_PREFIX, line, &severity[1]); if (*severity == 'S') fprintf(stderr, format, arg); else fprintf(stderr, format, (int) arg); putc('\n', stderr); if ((file = infile) == NULL) return; /* At end of file */ if (file->fp != NULL) { tp = file->buffer; /* Print current file */ fprintf(stderr, "%s", tp); /* name, making sure */ if (tp[strlen(tp) - 1] != '\n') /* there's a newline */ putc('\n', stderr); } while ((file = file->parent) != NULL) { /* Print #includes, too */ if (file->fp == NULL) fprintf(stderr, "from macro %s\n", file->filename); else { tp = file->buffer; fprintf(stderr, "from file %s, line %d:\n%s", (file->progname != NULL) ? file->progname : file->filename, file->line, tp); if (tp[strlen(tp) - 1] != '\n') putc('\n', stderr); } } } cerror(format, sarg) char *format; char *sarg; /* Single string argument */ /* * Print a normal error message, string argument. */ { domsg("SError", format, sarg); errors++; } cierror(format, narg) char *format; int narg; /* Single numeric argument */ /* * Print a normal error message, numeric argument. */ { domsg("IError", format, (char *) narg); errors++; } cfatal(format, sarg) char *format; char *sarg; /* Single string argument */ /* * A real disaster */ { domsg("SFatal error", format, sarg); exit(IO_ERROR); } cwarn(format, sarg) char *format; char *sarg; /* Single string argument */ /* * A non-fatal error, string argument. */ { domsg("SWarning", format, sarg); } ciwarn(format, narg) char *format; int narg; /* Single numeric argument */ /* * A non-fatal error, numeric argument. */ { domsg("IWarning", format, (char *) narg); } #if DEBUG /* * Things are getting worse, please send chocolate. */ dumpdef(why) char *why; /* * Dump current macro definition to output stream. */ { register DEFBUF *dp; register DEFBUF **syp; printf("CPP symbol table dump %s\n", why); for (syp = symtab; syp < &symtab[SBSIZE]; syp++) { if ((dp = *syp) != (DEFBUF *) NULL) { printf("symtab[%d]\n", (syp - symtab)); do { dumpadef((char *) NULL, dp); } while ((dp = dp->link) != (DEFBUF *) NULL); } } } dumpadef(why, dp) char *why; /* Notation */ register DEFBUF *dp; /* * Dump a specific macro definition. */ { printf(" \"%s\" [%d]", dp->name, dp->nargs); dumpstring(why, dp->repl); } dumpstring(why, text) char *why; char *text; /* * Dump text readably. */ { register char *cp; register int c; if (why != NULL) printf(" (%s)", why); printf(" => "); if (text == NULL) printf("NULL"); else { for (cp = text; (c = *cp++ & 0xFF) != EOS;) { if (c == MAC_PARM) printf("<%d>", *cp++ & 0xFF); else if (isprint(c) || c == '\n' || c == '\t') putchar(c); else if (c == TOK_SEP) printf(""); else if (c == COM_SEP) printf(""); else if (c == DEF_MAGIC) printf(""); else if (c == ST_QUOTE) printf(""); else if (c < ' ') printf("<^%c>", c + '@'); else printf("<\\0%o>", c); } } putchar('\n'); } dumpunget(why) char *why; /* * Dump all ungotten junk (pending macros and current input lines). */ { register FILEINFO *file; printf("dump of pending input text"); if (why != NULL) printf("-- %s", why); putchar('\n'); for (file = infile; file != NULL; file = file->parent) { if (file->fp == NULL) dumpstring(file->filename, file->bptr); else if (file->progname != NULL) dumpstring(file->progname, file->bptr); else dumpstring(file->filename, file->bptr); } } #endif