/* External procedures for these programs. */ /* This includes and "site.h". */ #include "extra.h" extern unsigned char xord[], xchr[]; /* These help to deal with Pascal vs. C strings. */ void make_c_string (), make_pascal_string (); void end_with_null (), end_with_space (); /* Round R to the nearest whole number. */ integer zround (double r) { return (integer) (r >= 0.0 ? (r + 0.5) : (r - 0.5)); } /* File operations. */ /* Open a file; don't return if any error occurs. NAME is a Pascal string, but is changed to a C string and not changed back. */ FILE *checked_fopen (char *name, char *mode) { FILE *result; make_c_string (&name); result = fopen (name, mode); if (result != NULL) return result; perror (name); exit (1); /*NOTREACHED*/ } /* Return true if we're at the end of FILE, else false. This implements Pascal's `eof' builtin. */ boolean test_eof (FILE *file) { register int c; /* Maybe we're already at the end? */ if (feof (file)) return true; if ((c = getc (file)) == EOF) return true; /* Whoops, we weren't at the end. Back up. */ (void) ungetc (c, file); return false; } /* Return true on end-of-line in FILE or at the end of FILE, else false. */ boolean eoln (FILE *file) { register int c; if (feof (file)) return true; c = getc (file); if (c != EOF) (void) ungetc (c, file); return ((boolean) (c == '\n' || c == EOF)); } /* Print real number R in the Pascal format N:M on the file F. */ void fprintreal (FILE *f, double r, int n, int m) { char fmt[50]; /* Surely enough, since N and M won't be more than 25 digits each! */ (void) sprintf (fmt, "%%%d.%dlf", n, m); (void) fprintf (f, fmt, r); } /* Print S, a Pascal string, on the file F. It starts at index 1 and is terminated by a space. */ static void fprint_pascal_string (char *s, FILE *f) { s++; while (*s != ' ') putc (*s++, f); } /* Print S, a Pascal string, on stdout. */ void printpascalstring (char *s) { fprint_pascal_string (s, stdout); } /* Ditto, for stderr. */ void errprintpascalstring (char *s) { fprint_pascal_string (s, stderr); } /* Read an integer from the file F, reading past the subsequent end of line. */ integer inputint (FILE *f) { char buffer[50]; /* Long enough for anything reasonable. */ return fgets (buffer, sizeof (buffer), f) ? atoi (buffer) : 0; } /* Read three integers from stdin. */ void zinput3ints (integer *a, integer *b, integer *c) { while (scanf ("%ld %ld %ld\n", a, b, c) != 3) (void) fprintf (stderr, "Please enter three integers.\n"); } /* String operations. */ /* Change the suffix of BASE (a Pascal string) to be SUFFIX (another Pascal string). We have to change them to C strings to do the work, then convert them back to Pascal strings. */ void makesuffix (char *base, char *suffix) { char *last_dot, *last_slash; make_c_string (&base); last_dot = rindex (base, '.'); last_slash = rindex (base, '/'); #ifdef AMIGA if (last_slash == NULL) last_slash = strchr (base, ':'); #endif if (last_dot == NULL || last_dot < last_slash) /* Add the suffix? */ { make_c_string (&suffix); strcat (base, suffix); make_pascal_string (&suffix); } make_pascal_string (&base); } /* Deal with C and Pascal strings. */ /* Change the Pascal string P_STRING into a C string; i.e., make it start after the leading character Pascal puts in, and terminate it with a null. We also have to convert from the internal character set (ASCII) to the external character set, if we're running on a non-ASCII system. */ void make_c_string (char **p_string) { (*p_string)++; end_with_null (*p_string); } /* Replace the first space we come to with a null. */ void end_with_null (char *s) { for ( ; *s != ' '; s++) #ifdef NONASCII *s = xchr[*s] #endif ; *s = 0; } /* Change the C string C_STRING into a Pascal string; i.e., make it start one character before it does now (so C_STRING had better have been a Pascal string originally), and terminate with a space. We also convert back from the external character set to the internal character set (ASCII), if we're running on a non-ASCII system. */ void make_pascal_string (char **c_string) { end_with_space (*c_string); (*c_string)--; } /* Replace the first null we come to with a space. */ void end_with_space (char *s) { for ( ; *s != 0; s++) #ifdef NONASCII *s = xchr[*s] #endif ; *s = ' '; } static char *concat (char *s1, char *s2) { char *r = xmalloc (strlen (s1) + strlen (s2) + 1); strcpy (r, s1); strcat (r, s2); return r; } static char *string_copy (char *s) { char *new_string = xmalloc (strlen (s) + 1); strcpy (new_string, s); return new_string; } /* Memory operations: variants of malloc(3) and realloc(3) that just give up the ghost when they fail. */ extern char *malloc (), *realloc (); char *xmalloc (unsigned size) { char *mem = malloc (size); if (mem == NULL) { fprintf (stderr, "! Cannot allocate %u bytes.\n", size); exit (10); } return mem; } char *xrealloc (char *ptr, unsigned size) { char *mem = realloc (ptr, size); if (mem == NULL) { fprintf (stderr, "! Cannot reallocate %u bytes at %x.\n", size, ptr); exit (10); } return mem; } /* Path searching. */ #define NUMBER_OF_PATHS 11 static char *path[NUMBER_OF_PATHS]; static char *env_var_names[NUMBER_OF_PATHS] = { "BIBINPUTS", "GFFONTS", "MFBASES", "MFINPUTS", "MFPOOL", "PKFONTS", "TEXFORMATS", "TEXINPUTS", "TEXPOOL", "TEXFONTS", "VFFONTS" }; #define READ_ACCESS 4 /* Used in access(2) call. */ /* What separates elements of the path variables. */ #ifdef AMIGA #define PATH_DELIMITER ',' #else #ifdef MS_DOS #define PATH_DELIMITER ';' #else #define PATH_DELIMITER ':' #endif #endif /* We will need some system include files to deal with directories, even when SEARCH_SUBDIRECTORIES is undefined. (We also make sure we don't open a directory as an input file. */ #include #include /* And if we're actually going to search subdirectorys, we need still more include files. */ #ifdef SEARCH_SUBDIRECTORIES #if !defined (BSD) && !defined (AMIGA) #include typedef struct dirent *directory_entry_type; #else /* BSD || AMIGA */ #include typedef struct direct *directory_entry_type; #endif /* BSD, AMIGA*/ /* Declare the routine to get the current working directory. */ #ifdef HAVE_GETWD extern char *getwd (); #define getcwd(b, len) ((b) ? getwd (b) : getwd (xmalloc (len))) #else #ifdef ANSI extern char *getcwd (char *, int); #else extern char *getcwd (); #endif /* not ANSI */ #endif /* not HAVE_GETWD */ extern int errno; #endif /* SEARCH_SUBDIRECTORIES */ /* Subroutines. */ void next_component (); int is_dir (); /* Says whether NAME is ok to open for reading. */ #define READABLE_FILE(name) access (name, READ_ACCESS) == 0 && !is_dir (name) /* Replace a leading or trailing PATH_DELIMITER in DIR_LIST with DEFAULT_VALUE. The result is always dynamically allocated. */ static char *expand_colon (char *dir_list, char *default_value) { char *expansion = xmalloc (strlen (dir_list) + 1); strcpy (expansion, dir_list); if (*expansion == PATH_DELIMITER) { char *temp = expansion; expansion = concat (default_value, expansion); free (temp); } if (*(expansion + strlen (expansion) - 1) == PATH_DELIMITER) { char *temp = expansion; expansion = concat (expansion, default_value); free (temp); } return (expansion); } /* This routine initializes `path[PATH_INDEX]'. If the environment variable `env_var_names[PATH_INDEX]' is not set, we simply use DEFAULT_VALUE. Otherwise, we use the value of the environment variable, and then replace a leading or trailing colon with DEFAULT_VALUE. The result is always dynamically allocated. For example, if DEFAULT_VALUE is `foo', and the environment variable value is `:bar:baz:', the final result will be `foo:bar:baz:foo'. (Of course, it is pointless to have more than one extra `:' in practice.) */ static void do_path (unsigned path_index, char *default_value) { char *temp = getenv (env_var_names[path_index]); path[path_index] = temp == NULL ? string_copy (default_value) : expand_colon (temp, default_value); } #ifdef SEARCH_SUBDIRECTORIES static char *concat3 (char *s1, char *s2, char *s3) { char *r = xmalloc (strlen (s1) + strlen (s2) + strlen (s3) + 1); strcpy (r, s1); strcat (r, s2); strcat (r, s3); return r; } /* DIR_LIST is the default list of directories (colon-separated) to search. If the environment variable "`env_var_names[PATH_INDEX]'_SUBDIR" exists, we use that instead. We want to add all the subdirectories directly below each of the directories in the path. We return the list of directories found. By doing this all at the beginning of the program, we make the programs that look for only one file somewhat less efficient but this is more efficient when we look up many files using the same path. */ static char *do_subdir_path (unsigned path_index, char *dir_list) { char *cwd; unsigned len; char *result = xmalloc (1); char *env_var = concat (env_var_names[path_index], "_SUBDIR"); char *temp = getenv (env_var); free (env_var); if (temp == NULL) { temp = dir_list; /* Make a copy in writable memory. */ dir_list = xmalloc (strlen (temp) + 1); strcpy (dir_list, temp); } else dir_list = expand_colon (temp, dir_list); *result = 0; /* Unfortunately, we can't look in the environment for the current directory, because if we are running under a program (let's say Emacs), the PWD variable might have been set by Emacs' parent to the current directory at the time Emacs was invoked. This is not necessarily the same directory the user expects to be in. So, we must always call getcwd(3) or getwd(3), even though they are slow and prone to hang in networked installations. */ cwd = getcwd (NULL, FILENAMESIZE + 2); if (cwd == NULL) { perror ("getcwd"); exit (errno); } do { DIR *dir; directory_entry_type e; char dirname[FILENAMESIZE]; next_component (dirname, &dir_list); /* All the `::'s should be gone by now, but we may as well make sure `chdir' doesn't crash. */ if (*dirname == 0) continue; /* By changing directories, we save a bunch of string concatenations (and make the pathnames the kernel looks up shorter). */ #ifdef AMIGA if (strcmp(dirname, ".") && chdir(dirname)) continue; #else if (chdir (dirname) != 0) continue; #endif #ifdef AMIGA dir = opendir (""); #else dir = opendir ("."); #endif if (dir == NULL) continue; while ((e = readdir (dir)) != NULL) { #ifdef AMIGA if (is_dir (e->d_name)) { char *found; if (!strcmp(dirname, ".")) found = string_copy(e->d_name); else found = concat3 (dirname, "/", e->d_name); #else if (is_dir (e->d_name) && strcmp (e->d_name, ".") != 0 && strcmp (e->d_name, "..") != 0) { char *found = concat3 (dirname, "/", e->d_name); #endif result = xrealloc (result, strlen (result) + strlen (found) + 2); len = strlen (result); if (len > 0) { result[len] = PATH_DELIMITER; result[len + 1] = 0; } strcat (result, found); free (found); } } closedir (dir); /* Change back to the current directory, in case the path contains relative directory names. */ if (chdir (cwd) != 0) { perror (cwd); exit (errno); } } while (*dir_list != 0); len = strlen (path[path_index]); path[path_index] = xrealloc (path[path_index], len + strlen (result) + 2); *(path[path_index] + len) = PATH_DELIMITER; *(path[path_index] + len + 1) = 0; strcat (path[path_index], result); return result; } #endif /* SEARCH_SUBDIRECTORIES */ /* This sets up the paths, by either copying from an environment variable or using the default path, which is defined as a preprocessor symbol (with the same name as the environment variable) in `site.h'. The parameter PATH_BITS is a logical or of the paths we need to set. */ void setpaths (int path_bits) { #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXFONTS_SUBDIR) char *font_subdirs; #endif /* We must assign to the TFM file path before doing any of the other font paths, since it is used as a default. */ if (path_bits & (TFMFILEPATHBIT | GFFILEPATHBIT | PKFILEPATHBIT | VFFILEPATHBIT)) { do_path (TFMFILEPATH, TEXFONTS); #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXFONTS_SUBDIR) font_subdirs = do_subdir_path (TFMFILEPATH, TEXFONTS_SUBDIR); #endif } if (path_bits & BIBINPUTPATHBIT) do_path (BIBINPUTPATH, BIBINPUTS); if (path_bits & GFFILEPATHBIT) { do_path (GFFILEPATH, path[TFMFILEPATH]); #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXFONTS_SUBDIR) #ifdef AMIGA path[GFFILEPATH] = concat3 (path[GFFILEPATH], ",", font_subdirs); #else path[GFFILEPATH] = concat3 (path[GFFILEPATH], ":", font_subdirs); #endif #endif } if (path_bits & MFBASEPATHBIT) do_path (MFBASEPATH, MFBASES); if (path_bits & MFINPUTPATHBIT) { do_path (MFINPUTPATH, MFINPUTS); #if defined(SEARCH_SUBDIRECTORIES) && defined(MFINPUTS_SUBDIR) (void) do_subdir_path (MFINPUTPATH, MFINPUTS_SUBDIR); #endif } if (path_bits & MFPOOLPATHBIT) do_path (MFPOOLPATH, MFPOOL); if (path_bits & PKFILEPATHBIT) { do_path (PKFILEPATH, path[TFMFILEPATH]); #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXFONTS_SUBDIR) #ifdef AMIGA path[PKFILEPATH] = concat3 (path[PKFILEPATH], ",", font_subdirs); #else path[PKFILEPATH] = concat3 (path[PKFILEPATH], ":", font_subdirs); #endif #endif } if (path_bits & TEXFORMATPATHBIT) do_path (TEXFORMATPATH, TEXFORMATS); if (path_bits & TEXINPUTPATHBIT) { do_path (TEXINPUTPATH, TEXINPUTS); #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXINPUTS_SUBDIR) (void) do_subdir_path (TEXINPUTPATH, TEXINPUTS_SUBDIR); #endif } if (path_bits & TEXPOOLPATHBIT) do_path (TEXPOOLPATH, TEXPOOL); /* Some sites want to have a system default for VFFONTS, and others don't. */ if (path_bits & VFFILEPATHBIT) { #ifdef VFFONTS do_path (VFFILEPATH, VFFONTS); #else do_path (VFFILEPATH, path[TFMFILEPATH]); #endif #if defined(SEARCH_SUBDIRECTORIES) && defined(TEXFONTS_SUBDIR) #ifdef AMIGA path[VFFILEPATH] = concat3 (path[VFFILEPATH], ",", font_subdirs); #else path[VFFILEPATH] = concat3 (path[VFFILEPATH], ":", font_subdirs); #endif #endif } } /* Look for NAME, a Pascal string, in a colon-separated list of directories. The path to use is given (indirectly) by PATH_INDEX. If the search is successful, leave the full pathname in NAME (which therefore must have enough room for such a pathname), padded with blanks. Otherwise, or if NAME is an absolute or relative pathname, just leave it alone. */ boolean testreadaccess (char *name, int path_index) { char potential[FILENAMESIZE]; int ok = 0; char *the_path = path[path_index]; make_c_string (&name); #ifdef AMIGA if (strchr(name, ':') || strchr(name, '/')) #else if (*name == '/' || (*name == '.' && *(name + 1) == '/') || (*name == '.' && *(name + 1) == '.' && *(name + 2) == '/')) #endif ok = READABLE_FILE (name); else { do { next_component (potential, &the_path); if (*potential != 0) { #ifdef AMIGA if (!strcmp(potential, ".")) strcpy(potential, name); else { strcat (potential, "/"); strcat (potential, name); } #else strcat (potential, "/"); strcat (potential, name); #endif ok = READABLE_FILE (potential); } } while (!ok && *the_path != 0); /* If we found it, leave the answer in NAME. */ if (ok) strcpy (name, potential); } make_pascal_string (&name); return ((boolean) ok); } /* Return, in NAME, the next component of PATH, i.e., the characters up to the next PATH_DELIMITER. */ static void next_component (char name[], char **path) { unsigned count = 0; while (**path != 0 && **path != PATH_DELIMITER) { name[count++] = **path; (*path)++; /* Move further along, even between calls. */ } name[count] = '\0'; if (**path == PATH_DELIMITER) (*path)++; /* Move past the delimiter. */ } #if !defined(S_ISDIR) #define S_ISDIR(m) ((m & S_IFMT) == S_IFDIR) #endif /* Return true if FN is a directory or a symlink to a directory, false if not. */ int is_dir (char *fn) { struct stat stats; return (stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode)); } #ifdef AMIGA int putw(int w, FILE *f) { register char *p; register int i; p = (char *) &w; for (i=sizeof(int) ; i-- ; ) if (putc(*p++,f)==EOF) return(EOF); return(w); } int getw(FILE *f) { int w = 0; register char *p; register int i,t; p = (char *) &w; for (i=sizeof(int) ; i-- ; ) if ((t=getc(f))==EOF) return(EOF); else *p++ = (char) t; return(w); } #endif