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Diffstat (limited to 'Build/source/texk/web2c/cwebdir/common.h')
-rw-r--r-- | Build/source/texk/web2c/cwebdir/common.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/cwebdir/common.h b/Build/source/texk/web2c/cwebdir/common.h new file mode 100644 index 00000000000..a91b8e8d8ea --- /dev/null +++ b/Build/source/texk/web2c/cwebdir/common.h @@ -0,0 +1,192 @@ +% This file is part of CWEB. +% This program by Silvio Levy and Donald E. Knuth +% is based on a program by Knuth. +% It is distributed WITHOUT ANY WARRANTY, express or implied. +% Version 3.0 --- June 1993 (works also with later versions) + +% Copyright (C) 1987,1990,1993 Silvio Levy and Donald E. Knuth + +% Permission is granted to make and distribute verbatim copies of this +% document provided that the copyright notice and this permission notice +% are preserved on all copies. + +% Permission is granted to copy and distribute modified versions of this +% document under the conditions for verbatim copying, provided that the +% entire resulting derived work is distributed under the terms of a +% permission notice identical to this one. + +% Please send comments, suggestions, etc. to levy@@math.berkeley.edu. + +% The next few sections contain stuff from the file |"common.w"| that has +% to be included in both |"ctangle.w"| and |"cweave.w"|. It appears in this +% file |"common.h"|, which needs to be updated when |"common.w"| changes. + +First comes general stuff: + +@d ctangle 0 +@d cweave 1 + +@<Common code for \.{CWEAVE} and \.{CTANGLE}@>= +typedef short boolean; +typedef char unsigned eight_bits; +extern boolean program; /* \.{CWEAVE} or \.{CTANGLE}? */ +extern int phase; /* which phase are we in? */ + +@ @<Include files@>= +#include <stdio.h> + +@ Code related to the character set: +@^ASCII code dependencies@> + +@d and_and 04 /* `\.{\&\&}'\,; corresponds to MIT's {\tentex\char'4} */ +@d lt_lt 020 /* `\.{<<}'\,; corresponds to MIT's {\tentex\char'20} */ +@d gt_gt 021 /* `\.{>>}'\,; corresponds to MIT's {\tentex\char'21} */ +@d plus_plus 013 /* `\.{++}'\,; corresponds to MIT's {\tentex\char'13} */ +@d minus_minus 01 /* `\.{--}'\,; corresponds to MIT's {\tentex\char'1} */ +@d minus_gt 031 /* `\.{->}'\,; corresponds to MIT's {\tentex\char'31} */ +@d not_eq 032 /* `\.{!=}'\,; corresponds to MIT's {\tentex\char'32} */ +@d lt_eq 034 /* `\.{<=}'\,; corresponds to MIT's {\tentex\char'34} */ +@d gt_eq 035 /* `\.{>=}'\,; corresponds to MIT's {\tentex\char'35} */ +@d eq_eq 036 /* `\.{==}'\,; corresponds to MIT's {\tentex\char'36} */ +@d or_or 037 /* `\.{\v\v}'\,; corresponds to MIT's {\tentex\char'37} */ +@d dot_dot_dot 016 /* `\.{...}'\,; corresponds to MIT's {\tentex\char'16} */ +@d colon_colon 06 /* `\.{::}'\,; corresponds to MIT's {\tentex\char'6} */ +@d period_ast 026 /* `\.{.*}'\,; corresponds to MIT's {\tentex\char'26} */ +@d minus_gt_ast 027 /* `\.{->*}'\,; corresponds to MIT's {\tentex\char'27} */ + +@<Common code...@>= +char section_text[longest_name+1]; /* name being sought for */ +char *section_text_end = section_text+longest_name; /* end of |section_text| */ +char *id_first; /* where the current identifier begins in the buffer */ +char *id_loc; /* just after the current identifier in the buffer */ + +@ Code related to input routines: + +@d xisalpha(c) (isalpha(c)&&((eight_bits)c<0200)) +@d xisdigit(c) (isdigit(c)&&((eight_bits)c<0200)) +@d xisspace(c) (isspace(c)&&((eight_bits)c<0200)) +@d xislower(c) (islower(c)&&((eight_bits)c<0200)) +@d xisupper(c) (isupper(c)&&((eight_bits)c<0200)) +@d xisxdigit(c) (isxdigit(c)&&((eight_bits)c<0200)) + +@<Common code...@>= +extern char buffer[]; /* where each line of input goes */ +extern char *buffer_end; /* end of |buffer| */ +extern char *loc; /* points to the next character to be read from the buffer*/ +extern char *limit; /* points to the last character in the buffer */ + +@ Code related to identifier and section name storage: +@d length(c) (c+1)->byte_start-(c)->byte_start /* the length of a name */ +@d print_id(c) term_write((c)->byte_start,length((c))) /* print identifier */ +@d llink link /* left link in binary search tree for section names */ +@d rlink dummy.Rlink /* right link in binary search tree for section names */ +@d root name_dir->rlink /* the root of the binary search tree + for section names */ +@d chunk_marker 0 + +@<Common code...@>= +typedef struct name_info { + char *byte_start; /* beginning of the name in |byte_mem| */ + struct name_info *link; + union { + struct name_info *Rlink; /* right link in binary search tree for section + names */ + char Ilk; /* used by identifiers in \.{CWEAVE} only */ + } dummy; + char *equiv_or_xref; /* info corresponding to names */ +} name_info; /* contains information about an identifier or section name */ +typedef name_info *name_pointer; /* pointer into array of \&{name\_info}s */ +typedef name_pointer *hash_pointer; +extern char byte_mem[]; /* characters of names */ +extern char *byte_mem_end; /* end of |byte_mem| */ +extern name_info name_dir[]; /* information about names */ +extern name_pointer name_dir_end; /* end of |name_dir| */ +extern name_pointer name_ptr; /* first unused position in |byte_start| */ +extern char *byte_ptr; /* first unused position in |byte_mem| */ +extern name_pointer hash[]; /* heads of hash lists */ +extern hash_pointer hash_end; /* end of |hash| */ +extern hash_pointer h; /* index into hash-head array */ +extern name_pointer id_lookup(); /* looks up a string in the identifier table */ +extern name_pointer section_lookup(); /* finds section name */ +extern void print_section_name(), sprint_section_name(); + +@ Code related to error handling: +@d spotless 0 /* |history| value for normal jobs */ +@d harmless_message 1 /* |history| value when non-serious info was printed */ +@d error_message 2 /* |history| value when an error was noted */ +@d fatal_message 3 /* |history| value when we had to stop prematurely */ +@d mark_harmless {if (history==spotless) history=harmless_message;} +@d mark_error history=error_message +@d confusion(s) fatal("! This can't happen: ",s) + +@<Common...@>= +extern history; /* indicates how bad this run was */ +extern err_print(); /* print error message and context */ +extern wrap_up(); /* indicate |history| and exit */ +extern void fatal(); /* issue error message and die */ +extern void overflow(); /* succumb because a table has overflowed */ + +@ Code related to file handling: +@f line x /* make |line| an unreserved word */ +@d max_file_name_length 60 +@d cur_file file[include_depth] /* current file */ +@d cur_file_name file_name[include_depth] /* current file name */ +@d web_file_name file_name[0] /* main source file name */ +@d cur_line line[include_depth] /* number of current line in current file */ + +@<Common code...@>= +extern include_depth; /* current level of nesting */ +extern FILE *file[]; /* stack of non-change files */ +extern FILE *change_file; /* change file */ +extern char C_file_name[]; /* name of |C_file| */ +extern char tex_file_name[]; /* name of |tex_file| */ +extern char idx_file_name[]; /* name of |idx_file| */ +extern char scn_file_name[]; /* name of |scn_file| */ +extern char file_name[][max_file_name_length]; + /* stack of non-change file names */ +extern char change_file_name[]; /* name of change file */ +extern line[]; /* number of current line in the stacked files */ +extern change_line; /* number of current line in change file */ +extern boolean input_has_ended; /* if there is no more input */ +extern boolean changing; /* if the current line is from |change_file| */ +extern boolean web_file_open; /* if the web file is being read */ +extern reset_input(); /* initialize to read the web file and change file */ +extern get_line(); /* inputs the next line */ +extern check_complete(); /* checks that all changes were picked up */ + +@ Code related to section numbers: +@<Common code...@>= +typedef unsigned short sixteen_bits; +extern sixteen_bits section_count; /* the current section number */ +extern boolean changed_section[]; /* is the section changed? */ +extern boolean change_pending; /* is a decision about change still unclear? */ +extern boolean print_where; /* tells \.{CTANGLE} to print line and file info */ + +@ Code related to command line arguments: +@d show_banner flags['b'] /* should the banner line be printed? */ +@d show_progress flags['p'] /* should progress reports be printed? */ +@d show_happiness flags['h'] /* should lack of errors be announced? */ + +@<Common code...@>= +extern int argc; /* copy of |ac| parameter to |main| */ +extern char **argv; /* copy of |av| parameter to |main| */ +extern boolean flags[]; /* an option for each 7-bit code */ + +@ Code relating to output: +@d update_terminal fflush(stdout) /* empty the terminal output buffer */ +@d new_line putchar('\n') @d putxchar putchar +@d term_write(a,b) fflush(stdout),fwrite(a,sizeof(char),b,stdout) +@d C_printf(c,a) fprintf(C_file,c,a) +@d C_putc(c) putc(c,C_file) + +@<Common code...@>= +extern FILE *C_file; /* where output of \.{CTANGLE} goes */ +extern FILE *tex_file; /* where output of \.{CWEAVE} goes */ +extern FILE *idx_file; /* where index from \.{CWEAVE} goes */ +extern FILE *scn_file; /* where list of sections from \.{CWEAVE} goes */ +extern FILE *active_file; /* currently active file for \.{CWEAVE} output */ + +@ The procedure that gets everything rolling: + +@<Common code...@>= +extern void common_init(); |