int main(int argc, char **argv) { int dec_ind; /* current indentation for declarations */ int di_stack[20]; /* a stack of structure indentation levels */ int flushed_nl; /* used when buffering up comments to remember * that a newline was passed over */ int force_nl; /* when true, code must be broken */ int hd_type = 0; /* used to store type of stmt for if (...), * for (...), etc */ int i; /* local loop counter */ int scase; /* set to true when we see a case, so we will * know what to do with the following colon */ int sp_sw; /* when true, we are in the expression of * if(...), while(...), etc. */ int squest; /* when this is positive, we have seen a ? * without the matching : in a <c>?<s>:<s> * construct */ const char *t_ptr; /* used for copying tokens */ int tabs_to_var; /* true if using tabs to indent to var name */ int type_code; /* the type of token, returned by lexi */ int last_else = 0; /* true iff last keyword was an else */ /*-----------------------------------------------*\ | INITIALIZATION | \*-----------------------------------------------*/ found_err = 0; ps.p_stack[0] = stmt; /* this is the parser's stack */ ps.last_nl = true; /* this is true if the last thing scanned was * a newline */ ps.last_token = semicolon; combuf = (char *) malloc(bufsize); if (combuf == NULL) err(1, NULL); labbuf = (char *) malloc(bufsize); if (labbuf == NULL) err(1, NULL); codebuf = (char *) malloc(bufsize); if (codebuf == NULL) err(1, NULL); tokenbuf = (char *) malloc(bufsize); if (tokenbuf == NULL) err(1, NULL); l_com = combuf + bufsize - 5; l_lab = labbuf + bufsize - 5; l_code = codebuf + bufsize - 5; l_token = tokenbuf + bufsize - 5; combuf[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and * comment buffers */ combuf[1] = codebuf[1] = labbuf[1] = '\0'; ps.else_if = 1; /* Default else-if special processing to on */ s_lab = e_lab = labbuf + 1; s_code = e_code = codebuf + 1; s_com = e_com = combuf + 1; s_token = e_token = tokenbuf + 1; in_buffer = (char *) malloc(10); if (in_buffer == NULL) err(1, NULL); in_buffer_limit = in_buffer + 8; buf_ptr = buf_end = in_buffer; line_no = 1; had_eof = ps.in_decl = ps.decl_on_line = break_comma = false; sp_sw = force_nl = false; ps.in_or_st = false; ps.bl_line = true; dec_ind = 0; di_stack[ps.dec_nest = 0] = 0; ps.want_blank = ps.in_stmt = ps.ind_stmt = false; scase = ps.pcase = false; squest = 0; sc_end = 0; bp_save = 0; be_save = 0; output = 0; tabs_to_var = 0; /*--------------------------------------------------*\ | COMMAND LINE SCAN | \*--------------------------------------------------*/ #ifdef undef max_col = 78; /* -l78 */ lineup_to_parens = 1; /* -lp */ ps.ljust_decl = 0; /* -ndj */ ps.com_ind = 33; /* -c33 */ star_comment_cont = 1; /* -sc */ ps.ind_size = 8; /* -i8 */ verbose = 0; ps.decl_indent = 16; /* -di16 */ ps.local_decl_indent = -1; /* if this is not set to some nonnegative value * by an arg, we will set this equal to * ps.decl_ind */ ps.indent_parameters = 1; /* -ip */ ps.decl_com_ind = 0; /* if this is not set to some positive value * by an arg, we will set this equal to * ps.com_ind */ btype_2 = 1; /* -br */ cuddle_else = 1; /* -ce */ ps.unindent_displace = 0; /* -d0 */ ps.case_indent = 0; /* -cli0 */ format_block_comments = 1; /* -fcb */ format_col1_comments = 1; /* -fc1 */ procnames_start_line = 1; /* -psl */ proc_calls_space = 0; /* -npcs */ comment_delimiter_on_blankline = 1; /* -cdb */ ps.leave_comma = 1; /* -nbc */ #endif for (i = 1; i < argc; ++i) if (strcmp(argv[i], "-npro") == 0) break; set_defaults(); if (i >= argc) set_profile(); for (i = 1; i < argc; ++i) { /* * look thru args (if any) for changes to defaults */ if (argv[i][0] != '-') {/* no flag on parameter */ if (input == NULL) { /* we must have the input file */ in_name = argv[i]; /* remember name of input file */ input = fopen(in_name, "r"); if (input == NULL) /* check for open error */ err(1, "%s", in_name); continue; } else if (output == NULL) { /* we have the output file */ out_name = argv[i]; /* remember name of output file */ if (strcmp(in_name, out_name) == 0) { /* attempt to overwrite * the file */ errx(1, "input and output files must be different"); } output = fopen(out_name, "w"); if (output == NULL) /* check for create error */ err(1, "%s", out_name); continue; } errx(1, "unknown parameter: %s", argv[i]); } else set_option(argv[i]); } /* end of for */ if (input == NULL) input = stdin; if (output == NULL) { if (troff || input == stdin) output = stdout; else { out_name = in_name; bakcopy(); } } if (ps.com_ind <= 1) ps.com_ind = 2; /* dont put normal comments before column 2 */ if (troff) { if (bodyf.font[0] == 0) parsefont(&bodyf, "R"); if (scomf.font[0] == 0) parsefont(&scomf, "I"); if (blkcomf.font[0] == 0) blkcomf = scomf, blkcomf.size += 2; if (boxcomf.font[0] == 0) boxcomf = blkcomf; if (stringf.font[0] == 0) parsefont(&stringf, "L"); if (keywordf.font[0] == 0) parsefont(&keywordf, "B"); writefdef(&bodyf, 'B'); writefdef(&scomf, 'C'); writefdef(&blkcomf, 'L'); writefdef(&boxcomf, 'X'); writefdef(&stringf, 'S'); writefdef(&keywordf, 'K'); } if (block_comment_max_col <= 0) block_comment_max_col = max_col; if (ps.local_decl_indent < 0) /* if not specified by user, set this */ ps.local_decl_indent = ps.decl_indent; if (ps.decl_com_ind <= 0) /* if not specified by user, set this */ ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind; if (continuation_indent == 0) continuation_indent = ps.ind_size; fill_buffer(); /* get first batch of stuff into input buffer */ parse(semicolon); { char *p = buf_ptr; int col = 1; while (1) { if (*p == ' ') col++; else if (*p == '\t') col = ((col - 1) & ~7) + 9; else break; p++; } if (col > ps.ind_size) ps.ind_level = ps.i_l_follow = col / ps.ind_size; } if (troff) { const char *p = in_name, *beg = in_name; while (*p) if (*p++ == '/') beg = p; fprintf(output, ".Fn \"%s\"\n", beg); } /* * START OF MAIN LOOP */ while (1) { /* this is the main loop. it will go until we * reach eof */ int is_procname; type_code = lexi(); /* lexi reads one token. The actual * characters read are stored in "token". lexi * returns a code indicating the type of token */ is_procname = ps.procname[0]; /* * The following code moves everything following an if (), while (), * else, etc. up to the start of the following stmt to a buffer. This * allows proper handling of both kinds of brace placement. */ flushed_nl = false; while (ps.search_brace) { /* if we scanned an if(), while(), * etc., we might need to copy stuff * into a buffer we must loop, copying * stuff into save_com, until we find * the start of the stmt which follows * the if, or whatever */ switch (type_code) { case newline: ++line_no; flushed_nl = true; case form_feed: break; /* form feeds and newlines found here will be * ignored */ case lbrace: /* this is a brace that starts the compound * stmt */ if (sc_end == 0) { /* ignore buffering if a comment wasnt * stored up */ ps.search_brace = false; goto check_type; } if (btype_2) { save_com[0] = '{'; /* we either want to put the brace * right after the if */ goto sw_buffer; /* go to common code to get out of * this loop */ } case comment: /* we have a comment, so we must copy it into * the buffer */ if (!flushed_nl || sc_end != 0) { if (sc_end == 0) { /* if this is the first comment, we * must set up the buffer */ save_com[0] = save_com[1] = ' '; sc_end = &(save_com[2]); } else { *sc_end++ = '\n'; /* add newline between * comments */ *sc_end++ = ' '; --line_no; } *sc_end++ = '/'; /* copy in start of comment */ *sc_end++ = '*'; for (;;) { /* loop until we get to the end of the comment */ *sc_end = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); if (*sc_end++ == '*' && *buf_ptr == '/') break; /* we are at end of comment */ if (sc_end >= &(save_com[sc_size])) { /* check for temp buffer * overflow */ diag2(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever"); fflush(output); exit(1); } } *sc_end++ = '/'; /* add ending slash */ if (++buf_ptr >= buf_end) /* get past / in buffer */ fill_buffer(); break; } default: /* it is the start of a normal statement */ if (flushed_nl) /* if we flushed a newline, make sure it is * put back */ force_nl = true; if ((type_code == sp_paren && *token == 'i' && last_else && ps.else_if) || (type_code == sp_nparen && *token == 'e' && e_code != s_code && e_code[-1] == '}')) force_nl = false; if (sc_end == 0) { /* ignore buffering if comment wasnt * saved up */ ps.search_brace = false; goto check_type; } if (force_nl) { /* if we should insert a nl here, put it into * the buffer */ force_nl = false; --line_no; /* this will be re-increased when the nl is * read from the buffer */ *sc_end++ = '\n'; *sc_end++ = ' '; if (verbose && !flushed_nl) /* print error msg if the line * was not already broken */ diag2(0, "Line broken"); flushed_nl = false; } for (t_ptr = token; *t_ptr; ++t_ptr) *sc_end++ = *t_ptr; /* copy token into temp buffer */ ps.procname[0] = 0; sw_buffer: ps.search_brace = false; /* stop looking for start of * stmt */ bp_save = buf_ptr; /* save current input buffer */ be_save = buf_end; buf_ptr = save_com; /* fix so that subsequent calls to * lexi will take tokens out of * save_com */ *sc_end++ = ' ';/* add trailing blank, just in case */ buf_end = sc_end; sc_end = 0; break; } /* end of switch */ if (type_code != 0) /* we must make this check, just in case there * was an unexpected EOF */ type_code = lexi(); /* read another token */ /* if (ps.search_brace) ps.procname[0] = 0; */ if ((is_procname = ps.procname[0]) && flushed_nl && !procnames_start_line && ps.in_decl && type_code == ident) flushed_nl = 0; } /* end of while (search_brace) */ last_else = 0; check_type: if (type_code == 0) { /* we got eof */ if (s_lab != e_lab || s_code != e_code || s_com != e_com) /* must dump end of line */ dump_line(); if (ps.tos > 1) /* check for balanced braces */ diag2(1, "Stuff missing from end of file"); if (verbose) { printf("There were %d output lines and %d comments\n", ps.out_lines, ps.out_coms); printf("(Lines with comments)/(Lines with code): %6.3f\n", (1.0 * ps.com_lines) / code_lines); } fflush(output); exit(found_err); } if ( (type_code != comment) && (type_code != newline) && (type_code != preesc) && (type_code != form_feed)) { if (force_nl && (type_code != semicolon) && (type_code != lbrace || !btype_2)) { /* we should force a broken line here */ if (verbose && !flushed_nl) diag2(0, "Line broken"); flushed_nl = false; dump_line(); ps.want_blank = false; /* dont insert blank at line start */ force_nl = false; } ps.in_stmt = true; /* turn on flag which causes an extra level of * indentation. this is turned off by a ; or * '}' */ if (s_com != e_com) { /* the turkey has embedded a comment * in a line. fix it */ *e_code++ = ' '; for (t_ptr = s_com; *t_ptr; ++t_ptr) { CHECK_SIZE_CODE; *e_code++ = *t_ptr; } *e_code++ = ' '; *e_code = '\0'; /* null terminate code sect */ ps.want_blank = false; e_com = s_com; } } else if (type_code != comment) /* preserve force_nl thru a comment */ force_nl = false; /* cancel forced newline after newline, form * feed, etc */ /*-----------------------------------------------------*\ | do switch on type of token scanned | \*-----------------------------------------------------*/ CHECK_SIZE_CODE; switch (type_code) { /* now, decide what to do with the token */ case form_feed: /* found a form feed in line */ ps.use_ff = true; /* a form feed is treated much like a newline */ dump_line(); ps.want_blank = false; break; case newline: if (ps.last_token != comma || ps.p_l_follow > 0 || !ps.leave_comma || ps.block_init || !break_comma || s_com != e_com) { dump_line(); ps.want_blank = false; } ++line_no; /* keep track of input line number */ break; case lparen: /* got a '(' or '[' */ ++ps.p_l_follow; /* count parens to make Healy happy */ if (ps.want_blank && *token != '[' && (ps.last_token != ident || proc_calls_space || (ps.its_a_keyword && (!ps.sizeof_keyword || Bill_Shannon)))) *e_code++ = ' '; if (ps.in_decl && !ps.block_init) if (troff && !ps.dumped_decl_indent && !is_procname && ps.last_token == decl) { ps.dumped_decl_indent = 1; sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); e_code += strlen(e_code); } else { while ((e_code - s_code) < dec_ind) { CHECK_SIZE_CODE; *e_code++ = ' '; } *e_code++ = token[0]; } else *e_code++ = token[0]; ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code; if (sp_sw && ps.p_l_follow == 1 && extra_expression_indent && ps.paren_indents[0] < 2 * ps.ind_size) ps.paren_indents[0] = 2 * ps.ind_size; ps.want_blank = false; if (ps.in_or_st && *token == '(' && ps.tos <= 2) { /* * this is a kluge to make sure that declarations will be * aligned right if proc decl has an explicit type on it, i.e. * "int a(x) {..." */ parse(semicolon); /* I said this was a kluge... */ ps.in_or_st = false; /* turn off flag for structure decl or * initialization */ } if (ps.sizeof_keyword) ps.sizeof_mask |= 1 << ps.p_l_follow; break; case rparen: /* got a ')' or ']' */ rparen_count--; if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.sizeof_mask) { ps.last_u_d = true; ps.cast_mask &= (1 << ps.p_l_follow) - 1; ps.want_blank = false; } else ps.want_blank = true; ps.sizeof_mask &= (1 << ps.p_l_follow) - 1; if (--ps.p_l_follow < 0) { ps.p_l_follow = 0; diag3(0, "Extra %c", *token); } if (e_code == s_code) /* if the paren starts the line */ ps.paren_level = ps.p_l_follow; /* then indent it */ *e_code++ = token[0]; if (sp_sw && (ps.p_l_follow == 0)) { /* check for end of if * (...), or some such */ sp_sw = false; force_nl = true;/* must force newline after if */ ps.last_u_d = true; /* inform lexi that a following * operator is unary */ ps.in_stmt = false; /* dont use stmt continuation * indentation */ parse(hd_type); /* let parser worry about if, or whatever */ } ps.search_brace = btype_2; /* this should insure that constructs * such as main(){...} and int[]{...} * have their braces put in the right * place */ break; case unary_op: /* this could be any unary operation */ if (ps.want_blank) *e_code++ = ' '; if (troff && !ps.dumped_decl_indent && ps.in_decl && !is_procname) { sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); ps.dumped_decl_indent = 1; e_code += strlen(e_code); } else { const char *res = token; if (ps.in_decl && !ps.block_init) { /* if this is a unary op * in a declaration, we * should indent this * token */ for (i = 0; token[i]; ++i); /* find length of token */ while ((e_code - s_code) < (dec_ind - i)) { CHECK_SIZE_CODE; *e_code++ = ' '; /* pad it */ } } if (troff && token[0] == '-' && token[1] == '>') res = "\\(->"; for (t_ptr = res; *t_ptr; ++t_ptr) { CHECK_SIZE_CODE; *e_code++ = *t_ptr; } } ps.want_blank = false; break; case binary_op: /* any binary operation */ if (ps.want_blank) *e_code++ = ' '; { const char *res = token; if (troff) switch (token[0]) { case '<': if (token[1] == '=') res = "\\(<="; break; case '>': if (token[1] == '=') res = "\\(>="; break; case '!': if (token[1] == '=') res = "\\(!="; break; case '|': if (token[1] == '|') res = "\\(br\\(br"; else if (token[1] == 0) res = "\\(br"; break; } for (t_ptr = res; *t_ptr; ++t_ptr) { CHECK_SIZE_CODE; *e_code++ = *t_ptr; /* move the operator */ } } ps.want_blank = true; break; case postop: /* got a trailing ++ or -- */ *e_code++ = token[0]; *e_code++ = token[1]; ps.want_blank = true; break; case question: /* got a ? */ squest++; /* this will be used when a later colon * appears so we can distinguish the * <c>?<n>:<n> construct */ if (ps.want_blank) *e_code++ = ' '; *e_code++ = '?'; ps.want_blank = true; break; case casestmt: /* got word 'case' or 'default' */ scase = true; /* so we can process the later colon properly */ goto copy_id; case colon: /* got a ':' */ if (squest > 0) { /* it is part of the <c>?<n>: <n> construct */ --squest; if (ps.want_blank) *e_code++ = ' '; *e_code++ = ':'; ps.want_blank = true; break; } if (ps.in_or_st) { *e_code++ = ':'; ps.want_blank = false; break; } ps.in_stmt = false; /* seeing a label does not imply we are in a * stmt */ for (t_ptr = s_code; *t_ptr; ++t_ptr) *e_lab++ = *t_ptr; /* turn everything so far into a label */ e_code = s_code; *e_lab++ = ':'; *e_lab++ = ' '; *e_lab = '\0'; force_nl = ps.pcase = scase; /* ps.pcase will be used by * dump_line to decide how to * indent the label. force_nl * will force a case n: to be * on a line by itself */ scase = false; ps.want_blank = false; break; case semicolon: /* got a ';' */ ps.in_or_st = false;/* we are not in an initialization or * structure declaration */ scase = false; /* these will only need resetting in an error */ squest = 0; if (ps.last_token == rparen && rparen_count == 0) ps.in_parameter_declaration = 0; ps.cast_mask = 0; ps.sizeof_mask = 0; ps.block_init = 0; ps.block_init_level = 0; ps.just_saw_decl--; if (ps.in_decl && s_code == e_code && !ps.block_init) while ((e_code - s_code) < (dec_ind - 1)) { CHECK_SIZE_CODE; *e_code++ = ' '; } ps.in_decl = (ps.dec_nest > 0); /* if we were in a first level * structure declaration, we * arent any more */ if ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) { /* * This should be true iff there were unbalanced parens in the * stmt. It is a bit complicated, because the semicolon might * be in a for stmt */ diag2(1, "Unbalanced parens"); ps.p_l_follow = 0; if (sp_sw) { /* this is a check for an if, while, etc. with * unbalanced parens */ sp_sw = false; parse(hd_type); /* dont lose the if, or whatever */ } } *e_code++ = ';'; ps.want_blank = true; ps.in_stmt = (ps.p_l_follow > 0); /* we are no longer in the * middle of a stmt */ if (!sp_sw) { /* if not if for (;;) */ parse(semicolon); /* let parser know about end of stmt */ force_nl = true;/* force newline after an end of stmt */ } break; case lbrace: /* got a '{' */ ps.in_stmt = false; /* dont indent the {} */ if (!ps.block_init) force_nl = true;/* force other stuff on same line as '{' onto * new line */ else if (ps.block_init_level <= 0) ps.block_init_level = 1; else ps.block_init_level++; if (s_code != e_code && !ps.block_init) { if (!btype_2) { dump_line(); ps.want_blank = false; } else if (ps.in_parameter_declaration && !ps.in_or_st) { ps.i_l_follow = 0; if (function_brace_split) { /* dump the line prior to the * brace ... */ dump_line(); ps.want_blank = false; } else /* add a space between the decl and brace */ ps.want_blank = true; } } if (ps.in_parameter_declaration) prefix_blankline_requested = 0; if (ps.p_l_follow > 0) { /* check for preceding unbalanced * parens */ diag2(1, "Unbalanced parens"); ps.p_l_follow = 0; if (sp_sw) { /* check for unclosed if, for, etc. */ sp_sw = false; parse(hd_type); ps.ind_level = ps.i_l_follow; } } if (s_code == e_code) ps.ind_stmt = false; /* dont put extra indentation on line * with '{' */ if (ps.in_decl && ps.in_or_st) { /* this is either a structure * declaration or an init */ di_stack[ps.dec_nest++] = dec_ind; /* ? dec_ind = 0; */ } else { ps.decl_on_line = false; /* we cant be in the middle of * a declaration, so dont do * special indentation of * comments */ if (blanklines_after_declarations_at_proctop && ps.in_parameter_declaration) postfix_blankline_requested = 1; ps.in_parameter_declaration = 0; } dec_ind = 0; parse(lbrace); /* let parser know about this */ if (ps.want_blank) /* put a blank before '{' if '{' is not at * start of line */ *e_code++ = ' '; ps.want_blank = false; *e_code++ = '{'; ps.just_saw_decl = 0; break; case rbrace: /* got a '}' */ if (ps.p_stack[ps.tos] == decl && !ps.block_init) /* semicolons can be * omitted in * declarations */ parse(semicolon); if (ps.p_l_follow) {/* check for unclosed if, for, else. */ diag2(1, "Unbalanced parens"); ps.p_l_follow = 0; sp_sw = false; } ps.just_saw_decl = 0; ps.block_init_level--; if (s_code != e_code && !ps.block_init) { /* '}' must be first on * line */ if (verbose) diag2(0, "Line broken"); dump_line(); } *e_code++ = '}'; ps.want_blank = true; ps.in_stmt = ps.ind_stmt = false; if (ps.dec_nest > 0) { /* we are in multi-level structure * declaration */ dec_ind = di_stack[--ps.dec_nest]; if (ps.dec_nest == 0 && !ps.in_parameter_declaration) ps.just_saw_decl = 2; ps.in_decl = true; } prefix_blankline_requested = 0; parse(rbrace); /* let parser know about this */ ps.search_brace = cuddle_else && ps.p_stack[ps.tos] == ifhead && ps.il[ps.tos] >= ps.ind_level; if (ps.tos <= 1 && blanklines_after_procs && ps.dec_nest <= 0) postfix_blankline_requested = 1; break; case swstmt: /* got keyword "switch" */ sp_sw = true; hd_type = swstmt; /* keep this for when we have seen the * expression */ goto copy_id; /* go move the token into buffer */ case sp_paren: /* token is if, while, for */ sp_sw = true; /* the interesting stuff is done after the * expression is scanned */ hd_type = (*token == 'i' ? ifstmt : (*token == 'w' ? whilestmt : forstmt)); /* * remember the type of header for later use by parser */ goto copy_id; /* copy the token into line */ case sp_nparen: /* got else, do */ ps.in_stmt = false; if (*token == 'e') { if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) { if (verbose) diag2(0, "Line broken"); dump_line();/* make sure this starts a line */ ps.want_blank = false; } force_nl = true;/* also, following stuff must go onto new line */ last_else = 1; parse(elselit); } else { if (e_code != s_code) { /* make sure this starts a line */ if (verbose) diag2(0, "Line broken"); dump_line(); ps.want_blank = false; } force_nl = true;/* also, following stuff must go onto new line */ last_else = 0; parse(dolit); } goto copy_id; /* move the token into line */ case decl: /* we have a declaration type (int, register, * etc.) */ parse(decl); /* let parser worry about indentation */ if (ps.last_token == rparen && ps.tos <= 1) { ps.in_parameter_declaration = 1; if (s_code != e_code) { dump_line(); ps.want_blank = 0; } } if (ps.in_parameter_declaration && ps.indent_parameters && ps.dec_nest == 0) { ps.ind_level = ps.i_l_follow = 1; ps.ind_stmt = 0; } ps.in_or_st = true; /* this might be a structure or initialization * declaration */ ps.in_decl = ps.decl_on_line = true; if ( /* !ps.in_or_st && */ ps.dec_nest <= 0) ps.just_saw_decl = 2; prefix_blankline_requested = 0; for (i = 0; token[i++];); /* get length of token */ if (ps.ind_level == 0 || ps.dec_nest > 0) { /* global variable or struct member in local variable */ dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i; tabs_to_var = (use_tabs ? ps.decl_indent > 0 : 0); } else { /* local variable */ dec_ind = ps.local_decl_indent > 0 ? ps.local_decl_indent : i; tabs_to_var = (use_tabs ? ps.local_decl_indent > 0 : 0); } goto copy_id; case ident: /* got an identifier or constant */ if (ps.in_decl) { /* if we are in a declaration, we must indent * identifier */ if (is_procname == 0 || !procnames_start_line) { if (!ps.block_init) { if (troff && !ps.dumped_decl_indent) { if (ps.want_blank) *e_code++ = ' '; ps.want_blank = false; sprintf(e_code, "\n.De %dp+\200p\n", dec_ind * 7); ps.dumped_decl_indent = 1; e_code += strlen(e_code); } else { int cur_dec_ind; int pos, startpos; /* * in order to get the tab math right for * indentations that are not multiples of 8 we * need to modify both startpos and dec_ind * (cur_dec_ind) here by eight minus the * remainder of the current starting column * divided by eight. This seems to be a * properly working fix */ startpos = e_code - s_code; cur_dec_ind = dec_ind; pos = startpos; if ((ps.ind_level * ps.ind_size) % 8 != 0) { pos += (ps.ind_level * ps.ind_size) % 8; cur_dec_ind += (ps.ind_level * ps.ind_size) % 8; } if (tabs_to_var) { while ((pos & ~7) + 8 <= cur_dec_ind) { CHECK_SIZE_CODE; *e_code++ = '\t'; pos = (pos & ~7) + 8; } } while (pos < cur_dec_ind) { CHECK_SIZE_CODE; *e_code++ = ' '; pos++; } if (ps.want_blank && e_code - s_code == startpos) *e_code++ = ' '; ps.want_blank = false; } } } else { if (ps.want_blank) *e_code++ = ' '; ps.want_blank = false; if (dec_ind && s_code != e_code) dump_line(); dec_ind = 0; } } else if (sp_sw && ps.p_l_follow == 0) { sp_sw = false; force_nl = true; ps.last_u_d = true; ps.in_stmt = false; parse(hd_type); } copy_id: if (ps.want_blank) *e_code++ = ' '; if (troff && ps.its_a_keyword) { e_code = chfont(&bodyf, &keywordf, e_code); for (t_ptr = token; *t_ptr; ++t_ptr) { CHECK_SIZE_CODE; *e_code++ = keywordf.allcaps && islower(*t_ptr) ? toupper(*t_ptr) : *t_ptr; } e_code = chfont(&keywordf, &bodyf, e_code); } else for (t_ptr = token; *t_ptr; ++t_ptr) { CHECK_SIZE_CODE; *e_code++ = *t_ptr; } ps.want_blank = true; break; case period: /* treat a period kind of like a binary * operation */ *e_code++ = '.'; /* move the period into line */ ps.want_blank = false; /* dont put a blank after a period */ break; case comma: ps.want_blank = (s_code != e_code); /* only put blank after comma * if comma does not start the * line */ if (ps.in_decl && is_procname == 0 && !ps.block_init) while ((e_code - s_code) < (dec_ind - 1)) { CHECK_SIZE_CODE; *e_code++ = ' '; } *e_code++ = ','; if (ps.p_l_follow == 0) { if (ps.block_init_level <= 0) ps.block_init = 0; if (break_comma && (!ps.leave_comma || compute_code_target() + (e_code - s_code) > max_col - 8)) force_nl = true; } break; case preesc: /* got the character '#' */ if ((s_com != e_com) || (s_lab != e_lab) || (s_code != e_code)) dump_line(); *e_lab++ = '#'; /* move whole line to 'label' buffer */ { int in_comment = 0; int com_start = 0; char quote = 0; int com_end = 0; while (*buf_ptr == ' ' || *buf_ptr == '\t') { buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); } while (*buf_ptr != '\n' || (in_comment && !had_eof)) { CHECK_SIZE_LAB; *e_lab = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); switch (*e_lab++) { case BACKSLASH: if (troff) *e_lab++ = BACKSLASH; if (!in_comment) { *e_lab++ = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); } break; case '/': if (*buf_ptr == '*' && !in_comment && !quote) { in_comment = 1; *e_lab++ = *buf_ptr++; com_start = e_lab - s_lab - 2; } break; case '"': if (quote == '"') quote = 0; break; case '\'': if (quote == '\'') quote = 0; break; case '*': if (*buf_ptr == '/' && in_comment) { in_comment = 0; *e_lab++ = *buf_ptr++; com_end = e_lab - s_lab; } break; } } while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) e_lab--; if (e_lab - s_lab == com_end && bp_save == 0) { /* comment on * preprocessor line */ if (sc_end == 0) /* if this is the first comment, we * must set up the buffer */ sc_end = &(save_com[0]); else { *sc_end++ = '\n'; /* add newline between * comments */ *sc_end++ = ' '; --line_no; } bcopy(s_lab + com_start, sc_end, com_end - com_start); sc_end += com_end - com_start; if (sc_end >= &save_com[sc_size]) abort(); e_lab = s_lab + com_start; while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) e_lab--; bp_save = buf_ptr; /* save current input buffer */ be_save = buf_end; buf_ptr = save_com; /* fix so that subsequent calls to * lexi will take tokens out of * save_com */ *sc_end++ = ' '; /* add trailing blank, just in case */ buf_end = sc_end; sc_end = 0; } *e_lab = '\0'; /* null terminate line */ ps.pcase = false; } if (strncmp(s_lab, "#if", 3) == 0) { if (blanklines_around_conditional_compilation) { int c; prefix_blankline_requested++; while ((c = getc(input)) == '\n'); ungetc(c, input); } if ((size_t)ifdef_level < sizeof(state_stack)/sizeof(state_stack[0])) { match_state[ifdef_level].tos = -1; state_stack[ifdef_level++] = ps; } else diag2(1, "#if stack overflow"); } else if (strncmp(s_lab, "#else", 5) == 0) if (ifdef_level <= 0) diag2(1, "Unmatched #else"); else { match_state[ifdef_level - 1] = ps; ps = state_stack[ifdef_level - 1]; } else if (strncmp(s_lab, "#endif", 6) == 0) { if (ifdef_level <= 0) diag2(1, "Unmatched #endif"); else { ifdef_level--; #ifdef undef /* * This match needs to be more intelligent before the * message is useful */ if (match_state[ifdef_level].tos >= 0 && bcmp(&ps, &match_state[ifdef_level], sizeof ps)) diag2(0, "Syntactically inconsistent #ifdef alternatives"); #endif } if (blanklines_around_conditional_compilation) { postfix_blankline_requested++; n_real_blanklines = 0; } } break; /* subsequent processing of the newline * character will cause the line to be printed */ case comment: /* we have gotten a / followed by * this is a biggie */ if (flushed_nl) { /* we should force a broken line here */ flushed_nl = false; dump_line(); ps.want_blank = false; /* dont insert blank at line start */ force_nl = false; } pr_comment(); break; } /* end of big switch stmt */ *e_code = '\0'; /* make sure code section is null terminated */ if (type_code != comment && type_code != newline && type_code != preesc) ps.last_token = type_code; } /* end of main while (1) loop */ }
int lexi() { register char *tok; /* local pointer to next char in token */ int unary_delim; /* this is set to 1 if the current token forces a following operator to be unary */ static int last_code; /* the last token type returned */ static int l_struct; /* set to 1 if the last token was 'struct' */ int code; /* internal code to be returned */ char qchar; /* the delimiter character for a string */ tok = token; /* point to start of place to save token */ unary_delim = false; ps.col_1 = ps.last_nl; /* tell world that this token started in column 1 iff the last thing scanned was nl */ ps.last_nl = false; while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */ ps.col_1 = false; /* leading blanks imply token is not in column 1 */ if (++buf_ptr >= buf_end) fill_buffer(); } /* Scan an alphanumeric token */ if (chartype[*buf_ptr] == alphanum || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) { /* we have a character or number */ register char *j; /* used for searching thru list of reserved words */ register struct templ *p; if (isdigit(*buf_ptr) || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) { int seendot = 0, seenexp = 0; if (*buf_ptr == '0' && (buf_ptr[1] == 'x' || buf_ptr[1] == 'X')) { *tok++ = *buf_ptr++; *tok++ = *buf_ptr++; while (isxdigit(*buf_ptr)) *tok++ = *buf_ptr++; } else while (1) { if (*buf_ptr == '.') if (seendot) break; else seendot++; *tok++ = *buf_ptr++; if (!isdigit(*buf_ptr) && *buf_ptr != '.') if ((*buf_ptr != 'E' && *buf_ptr != 'e') || seenexp) break; else { seenexp++; seendot++; *tok++ = *buf_ptr++; if (*buf_ptr == '+' || *buf_ptr == '-') *tok++ = *buf_ptr++; } } if (*buf_ptr == 'L' || *buf_ptr == 'l') *tok++ = *buf_ptr++; } else while (chartype[*buf_ptr] == alphanum) { /* copy it over */ *tok++ = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); } *tok++ = '\0'; while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */ if (++buf_ptr >= buf_end) fill_buffer(); } ps.its_a_keyword = false; ps.sizeof_keyword = false; if (l_struct) { /* if last token was 'struct', then this token should be treated as a declaration */ l_struct = false; last_code = ident; ps.last_u_d = true; return (decl); } ps.last_u_d = false; /* Operator after indentifier is binary */ last_code = ident; /* Remember that this is the code we will return */ /* This loop will check if the token is a keyword. */ for (p = specials; (j = p->rwd) != 0; p++) { tok = token; /* point at scanned token */ if (*j++ != *tok++ || *j++ != *tok++) continue; /* This test depends on the fact that identifiers are always at least 1 character long (ie. the first two bytes of the identifier are always meaningful) */ if (tok[-1] == 0) break; /* If its a one-character identifier */ while (*tok++ == *j) if (*j++ == 0) goto found_keyword; /* I wish that C had a multi-level break... */ } if (p->rwd) { /* we have a keyword */ found_keyword: ps.its_a_keyword = true; ps.last_u_d = true; switch (p->rwcode) { case 1: /* it is a switch */ return (swstmt); case 2: /* a case or default */ return (casestmt); case 3: /* a "struct" */ if (ps.p_l_follow) break; /* inside parens: cast */ l_struct = true; /* Next time around, we will want to know that we have had a 'struct' */ case 4: /* one of the declaration keywords */ if (ps.p_l_follow) { ps.cast_mask |= 1 << ps.p_l_follow; break; /* inside parens: cast */ } last_code = decl; return (decl); case 5: /* if, while, for */ return (sp_paren); case 6: /* do, else */ return (sp_nparen); case 7: ps.sizeof_keyword = true; default: /* all others are treated like any other identifier */ return (ident); } /* end of switch */ } /* end of if (found_it) */ if (*buf_ptr == '(' && ps.tos <= 1 && ps.ind_level == 0) { register char *tp = buf_ptr; while (tp < buf_end) if (*tp++ == ')' && *tp == ';') goto not_proc; strncpy(ps.procname, token, sizeof ps.procname - 1); ps.in_par_decl = 1; not_proc: ; } /* The following hack attempts to guess whether or not the current token is in fact a declaration keyword -- one that has been typedefd */ if (((*buf_ptr == '*' && buf_ptr[1] != '=') || isalpha(*buf_ptr) || *buf_ptr == '_') && !ps.p_l_follow && !ps.block_init && (ps.last_token == rparen || ps.last_token == semicolon || ps.last_token == decl || ps.last_token == lbrace || ps.last_token == rbrace)) { ps.its_a_keyword = true; ps.last_u_d = true; last_code = decl; return decl; } if (last_code == decl) /* if this is a declared variable, then following sign is unary */ ps.last_u_d = true; /* will make "int a -1" work */ last_code = ident; return (ident); /* the ident is not in the list */ } /* end of procesing for alpanum character */ /* l l l Scan a non-alphanumeric token */ *tok++ = *buf_ptr; /* if it is only a one-character token, it is moved here */ *tok = '\0'; if (++buf_ptr >= buf_end) fill_buffer(); switch (*token) { case '\n': unary_delim = ps.last_u_d; ps.last_nl = true; /* remember that we just had a newline */ code = (had_eof ? 0 : newline); /* if data has been exausted, the newline is a dummy, and we should return code to stop */ break; case '\'': /* start of quoted character */ case '"': /* start of string */ qchar = *token; if (troff) { tok[-1] = '`'; if (qchar == '"') *tok++ = '`'; tok = chfont(&bodyf, &stringf, tok); } do { /* copy the string */ while (1) { /* move one character or [/<char>]<char> */ if (*buf_ptr == '\n') { printf("%d: Unterminated literal\n", line_no); goto stop_lit; } *tok = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); if (had_eof || ((tok - token) > (bufsize - 2))) { printf("Unterminated literal\n"); ++tok; goto stop_lit; /* get outof literal copying loop */ } if (*tok == BACKSLASH) { /* if escape, copy extra char */ if (*buf_ptr == '\n') /* check for escaped newline */ ++line_no; if (troff) { *++tok = BACKSLASH; if (*buf_ptr == BACKSLASH) *++tok = BACKSLASH; } *++tok = *buf_ptr++; ++tok; /* we must increment this again because we copied two chars */ if (buf_ptr >= buf_end) fill_buffer(); } else break; /* we copied one character */ } /* end of while (1) */ } while (*tok++ != qchar); if (troff) { tok = chfont(&stringf, &bodyf, tok - 1); if (qchar == '"') *tok++ = '\''; } stop_lit: code = ident; break; case ('('): case ('['): unary_delim = true; code = lparen; break; case (')'): case (']'): code = rparen; break; case '#': unary_delim = ps.last_u_d; code = preesc; break; case '?': unary_delim = true; code = question; break; case (':'): code = colon; unary_delim = true; break; case (';'): unary_delim = true; code = semicolon; break; case ('{'): unary_delim = true; /* if (ps.in_or_st) ps.block_init = 1; */ code = ps.block_init ? lparen : lbrace; break; case ('}'): unary_delim = true; code = ps.block_init ? rparen : rbrace; break; case 014: /* a form feed */ unary_delim = ps.last_u_d; ps.last_nl = true; /* remember this so we can set 'ps.col_1' right */ code = form_feed; break; case (','): unary_delim = true; code = comma; break; case '.': unary_delim = false; code = period; break; case '-': case '+': /* check for -, +, --, ++ */ code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; if (*buf_ptr == token[0]) { /* check for doubled character */ *tok++ = *buf_ptr++; /* buffer overflow will be checked at end of loop */ if (last_code == ident || last_code == rparen) { code = (ps.last_u_d ? unary_op : postop); /* check for following ++ or -- */ unary_delim = false; } } else if (*buf_ptr == '=') /* check for operator += */ *tok++ = *buf_ptr++; else if (*buf_ptr == '>') { /* check for operator -> */ *tok++ = *buf_ptr++; if (!ptr_binop) { unary_delim = false; code = unary_op; ps.want_blank = false; } } break; /* buffer overflow will be checked at end of switch */ case '=': if (ps.in_or_st) ps.block_init = 1; #ifdef undef if (chartype[*buf_ptr] == opchar) { /* we have two char assignment */ tok[-1] = *buf_ptr++; if ((tok[-1] == '<' || tok[-1] == '>') && tok[-1] == *buf_ptr) *tok++ = *buf_ptr++; *tok++ = '='; /* Flip =+ to += */ *tok = 0; } #else if (*buf_ptr == '=') { /* == */ *tok++ = '='; /* Flip =+ to += */ buf_ptr++; *tok = 0; } #endif code = binary_op; unary_delim = true; break; /* can drop thru!!! */ case '>': case '<': case '!': /* ops like <, <<, <=, !=, etc */ if (*buf_ptr == '>' || *buf_ptr == '<' || *buf_ptr == '=') { *tok++ = *buf_ptr; if (++buf_ptr >= buf_end) fill_buffer(); } if (*buf_ptr == '=') *tok++ = *buf_ptr++; code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; break; default: if (token[0] == '/' && *buf_ptr == '*') { /* it is start of comment */ *tok++ = '*'; if (++buf_ptr >= buf_end) fill_buffer(); code = comment; unary_delim = ps.last_u_d; break; } while (*(tok - 1) == *buf_ptr || *buf_ptr == '=') { /* handle ||, &&, etc, and also things as in int *****i */ *tok++ = *buf_ptr; if (++buf_ptr >= buf_end) fill_buffer(); } code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; } /* end of switch */ if (code != newline) { l_struct = false; last_code = code; } if (buf_ptr >= buf_end) /* check for input buffer empty */ fill_buffer(); ps.last_u_d = unary_delim; *tok = '\0'; /* null terminate the token */ return (code); }
int lexi(void) { int unary_delim; /* this is set to 1 if the current token * forces a following operator to be unary */ static int last_code; /* the last token type returned */ static int l_struct; /* set to 1 if the last token was 'struct' */ int code; /* internal code to be returned */ char qchar; /* the delimiter character for a string */ e_token = s_token; /* point to start of place to save token */ unary_delim = false; ps.col_1 = ps.last_nl; /* tell world that this token started in * column 1 iff the last thing scanned was nl */ ps.last_nl = false; while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */ ps.col_1 = false; /* leading blanks imply token is not in column * 1 */ if (++buf_ptr >= buf_end) fill_buffer(); } /* Scan an alphanumeric token */ if (chartype[(int)*buf_ptr] == alphanum || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) { /* * we have a character or number */ struct templ *p; if (isdigit(*buf_ptr) || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) { int seendot = 0, seenexp = 0, seensfx = 0; if (*buf_ptr == '0' && (buf_ptr[1] == 'x' || buf_ptr[1] == 'X')) { *e_token++ = *buf_ptr++; *e_token++ = *buf_ptr++; while (isxdigit(*buf_ptr)) { CHECK_SIZE_TOKEN; *e_token++ = *buf_ptr++; } } else while (1) { if (*buf_ptr == '.') { if (seendot) break; else seendot++; } CHECK_SIZE_TOKEN; *e_token++ = *buf_ptr++; if (!isdigit(*buf_ptr) && *buf_ptr != '.') { if ((*buf_ptr != 'E' && *buf_ptr != 'e') || seenexp) break; else { seenexp++; seendot++; CHECK_SIZE_TOKEN; *e_token++ = *buf_ptr++; if (*buf_ptr == '+' || *buf_ptr == '-') *e_token++ = *buf_ptr++; } } } while (1) { if (!(seensfx & 1) && (*buf_ptr == 'U' || *buf_ptr == 'u')) { CHECK_SIZE_TOKEN; *e_token++ = *buf_ptr++; seensfx |= 1; continue; } if (!(seensfx & 2) && (strchr("fFlL", *buf_ptr) != NULL)) { CHECK_SIZE_TOKEN; if (buf_ptr[1] == buf_ptr[0]) *e_token++ = *buf_ptr++; *e_token++ = *buf_ptr++; seensfx |= 2; continue; } break; } } else while (chartype[(int)*buf_ptr] == alphanum || *buf_ptr == BACKSLASH) { /* fill_buffer() terminates buffer with newline */ if (*buf_ptr == BACKSLASH) { if (*(buf_ptr + 1) == '\n') { buf_ptr += 2; if (buf_ptr >= buf_end) fill_buffer(); } else break; } CHECK_SIZE_TOKEN; /* copy it over */ *e_token++ = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); } *e_token++ = '\0'; while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */ if (++buf_ptr >= buf_end) fill_buffer(); } ps.keyword = 0; if (l_struct && !ps.p_l_follow) { /* if last token was 'struct' and we're not * in parentheses, then this token * should be treated as a declaration */ l_struct = false; last_code = ident; ps.last_u_d = true; return (decl); } ps.last_u_d = l_struct; /* Operator after identifier is binary * unless last token was 'struct' */ l_struct = false; last_code = ident; /* Remember that this is the code we will * return */ p = bsearch(s_token, specials, sizeof(specials) / sizeof(specials[0]), sizeof(specials[0]), strcmp_type); if (p == NULL) { /* not a special keyword... */ char *u; /* ... so maybe a type_t or a typedef */ if ((auto_typedefs && ((u = strrchr(s_token, '_')) != NULL) && strcmp(u, "_t") == 0) || (typename_top >= 0 && bsearch(s_token, typenames, typename_top + 1, sizeof(typenames[0]), strcmp_type))) { ps.keyword = 4; /* a type name */ ps.last_u_d = true; goto found_typename; } } else { /* we have a keyword */ ps.keyword = p->rwcode; ps.last_u_d = true; switch (p->rwcode) { case 7: /* it is a switch */ return (swstmt); case 8: /* a case or default */ return (casestmt); case 3: /* a "struct" */ /* * Next time around, we will want to know that we have had a * 'struct' */ l_struct = true; /* FALLTHROUGH */ case 4: /* one of the declaration keywords */ found_typename: if (ps.p_l_follow) { /* inside parens: cast, param list, offsetof or sizeof */ ps.cast_mask |= (1 << ps.p_l_follow) & ~ps.not_cast_mask; break; } last_code = decl; return (decl); case 5: /* if, while, for */ return (sp_paren); case 6: /* do, else */ return (sp_nparen); default: /* all others are treated like any other * identifier */ return (ident); } /* end of switch */ } /* end of if (found_it) */ if (*buf_ptr == '(' && ps.tos <= 1 && ps.ind_level == 0) { char *tp = buf_ptr; while (tp < buf_end) if (*tp++ == ')' && (*tp == ';' || *tp == ',')) goto not_proc; strncpy(ps.procname, token, sizeof ps.procname - 1); ps.in_parameter_declaration = 1; rparen_count = 1; not_proc:; } /* * The following hack attempts to guess whether or not the current * token is in fact a declaration keyword -- one that has been * typedefd */ if (((*buf_ptr == '*' && buf_ptr[1] != '=') || isalpha(*buf_ptr) || *buf_ptr == '_') && !ps.p_l_follow && !ps.block_init && (ps.last_token == rparen || ps.last_token == semicolon || ps.last_token == decl || ps.last_token == lbrace || ps.last_token == rbrace)) { ps.keyword = 4; /* a type name */ ps.last_u_d = true; last_code = decl; return decl; } if (last_code == decl) /* if this is a declared variable, then * following sign is unary */ ps.last_u_d = true; /* will make "int a -1" work */ last_code = ident; return (ident); /* the ident is not in the list */ } /* end of procesing for alpanum character */ /* Scan a non-alphanumeric token */ *e_token++ = *buf_ptr; /* if it is only a one-character token, it is * moved here */ *e_token = '\0'; if (++buf_ptr >= buf_end) fill_buffer(); switch (*token) { case '\n': unary_delim = ps.last_u_d; ps.last_nl = true; /* remember that we just had a newline */ code = (had_eof ? 0 : newline); /* * if data has been exhausted, the newline is a dummy, and we should * return code to stop */ break; case '\'': /* start of quoted character */ case '"': /* start of string */ qchar = *token; if (troff) { e_token[-1] = '`'; if (qchar == '"') *e_token++ = '`'; e_token = chfont(&bodyf, &stringf, e_token); } do { /* copy the string */ while (1) { /* move one character or [/<char>]<char> */ if (*buf_ptr == '\n') { diag2(1, "Unterminated literal"); goto stop_lit; } CHECK_SIZE_TOKEN; /* Only have to do this once in this loop, * since CHECK_SIZE guarantees that there * are at least 5 entries left */ *e_token = *buf_ptr++; if (buf_ptr >= buf_end) fill_buffer(); if (*e_token == BACKSLASH) { /* if escape, copy extra char */ if (*buf_ptr == '\n') /* check for escaped newline */ ++line_no; if (troff) { *++e_token = BACKSLASH; if (*buf_ptr == BACKSLASH) *++e_token = BACKSLASH; } *++e_token = *buf_ptr++; ++e_token; /* we must increment this again because we * copied two chars */ if (buf_ptr >= buf_end) fill_buffer(); } else break; /* we copied one character */ } /* end of while (1) */ } while (*e_token++ != qchar); if (troff) { e_token = chfont(&stringf, &bodyf, e_token - 1); if (qchar == '"') *e_token++ = '\''; } stop_lit: code = ident; break; case ('('): case ('['): unary_delim = true; code = lparen; break; case (')'): case (']'): code = rparen; break; case '#': unary_delim = ps.last_u_d; code = preesc; break; case '?': unary_delim = true; code = question; break; case (':'): code = colon; unary_delim = true; break; case (';'): unary_delim = true; code = semicolon; break; case ('{'): unary_delim = true; /* * if (ps.in_or_st) ps.block_init = 1; */ /* ? code = ps.block_init ? lparen : lbrace; */ code = lbrace; break; case ('}'): unary_delim = true; /* ? code = ps.block_init ? rparen : rbrace; */ code = rbrace; break; case 014: /* a form feed */ unary_delim = ps.last_u_d; ps.last_nl = true; /* remember this so we can set 'ps.col_1' * right */ code = form_feed; break; case (','): unary_delim = true; code = comma; break; case '.': unary_delim = false; code = period; break; case '-': case '+': /* check for -, +, --, ++ */ code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; if (*buf_ptr == token[0]) { /* check for doubled character */ *e_token++ = *buf_ptr++; /* buffer overflow will be checked at end of loop */ if (last_code == ident || last_code == rparen) { code = (ps.last_u_d ? unary_op : postop); /* check for following ++ or -- */ unary_delim = false; } } else if (*buf_ptr == '=') /* check for operator += */ *e_token++ = *buf_ptr++; else if (*buf_ptr == '>') { /* check for operator -> */ *e_token++ = *buf_ptr++; if (!pointer_as_binop) { unary_delim = false; code = unary_op; ps.want_blank = false; } } break; /* buffer overflow will be checked at end of * switch */ case '=': if (ps.in_or_st) ps.block_init = 1; #ifdef undef if (chartype[*buf_ptr] == opchar) { /* we have two char assignment */ e_token[-1] = *buf_ptr++; if ((e_token[-1] == '<' || e_token[-1] == '>') && e_token[-1] == *buf_ptr) *e_token++ = *buf_ptr++; *e_token++ = '='; /* Flip =+ to += */ *e_token = 0; } #else if (*buf_ptr == '=') {/* == */ *e_token++ = '='; /* Flip =+ to += */ buf_ptr++; *e_token = 0; } #endif code = binary_op; unary_delim = true; break; /* can drop thru!!! */ case '>': case '<': case '!': /* ops like <, <<, <=, !=, etc */ if (*buf_ptr == '>' || *buf_ptr == '<' || *buf_ptr == '=') { *e_token++ = *buf_ptr; if (++buf_ptr >= buf_end) fill_buffer(); } if (*buf_ptr == '=') *e_token++ = *buf_ptr++; code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; break; default: if (token[0] == '/' && *buf_ptr == '*') { /* it is start of comment */ *e_token++ = '*'; if (++buf_ptr >= buf_end) fill_buffer(); code = comment; unary_delim = ps.last_u_d; break; } while (*(e_token - 1) == *buf_ptr || *buf_ptr == '=') { /* * handle ||, &&, etc, and also things as in int *****i */ *e_token++ = *buf_ptr; if (++buf_ptr >= buf_end) fill_buffer(); } code = (ps.last_u_d ? unary_op : binary_op); unary_delim = true; } /* end of switch */ if (code != newline) { l_struct = false; last_code = code; } if (buf_ptr >= buf_end) /* check for input buffer empty */ fill_buffer(); ps.last_u_d = unary_delim; *e_token = '\0'; /* null terminate the token */ return (code); }