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Diffstat (limited to '')
| -rw-r--r-- | plug-ins/selection-to-path/global.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/plug-ins/selection-to-path/global.h b/plug-ins/selection-to-path/global.h new file mode 100644 index 0000000..1ee5962 --- /dev/null +++ b/plug-ins/selection-to-path/global.h @@ -0,0 +1,213 @@ +/* global.h: extend the standard programming environment a little. This + * is included from config.h, which everyone includes. + * + * Copyright (C) 1992 Free Software Foundation, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef GLOBAL_H +#define GLOBAL_H + +#include <stdlib.h> + +#include "types.h" + +/* Define common sorts of messages. */ + +/* This should be called only after a system call fails. */ +#define FATAL_PERROR(s) do { perror (s); exit (errno); } while (0) + + +#define START_FATAL() do { fputs ("fatal: ", stderr) +#define END_FATAL() fputs (".\n", stderr); exit (1); } while (0) + +#define FATAL(x) \ + START_FATAL (); fprintf (stderr, "%s", x); END_FATAL () +#define FATAL1(s, e1) \ + START_FATAL (); fprintf (stderr, s, e1); END_FATAL () +#define FATAL2(s, e1, e2) \ + START_FATAL (); fprintf (stderr, s, e1, e2); END_FATAL () +#define FATAL3(s, e1, e2, e3) \ + START_FATAL (); fprintf (stderr, s, e1, e2, e3); END_FATAL () +#define FATAL4(s, e1, e2, e3, e4) \ + START_FATAL (); fprintf (stderr, s, e1, e2, e3, e4); END_FATAL () + + +#define START_WARNING() do { fputs ("warning: ", stderr) +#define END_WARNING() fputs (".\n", stderr); fflush (stderr); } while (0) + +#define WARNING(x) \ + START_WARNING (); fprintf (stderr, "%s", x); END_WARNING () +#define WARNING1(s, e1) \ + START_WARNING (); fprintf (stderr, s, e1); END_WARNING () +#define WARNING2(s, e1, e2) \ + START_WARNING (); fprintf (stderr, s, e1, e2); END_WARNING () +#define WARNING3(s, e1, e2, e3) \ + START_WARNING (); fprintf (stderr, s, e1, e2, e3); END_WARNING () +#define WARNING4(s, e1, e2, e3, e4) \ + START_WARNING (); fprintf (stderr, s, e1, e2, e3, e4); END_WARNING () + +/* Define useful abbreviations. */ + +/* This is the maximum number of numerals that result when a 64-bit + integer is converted to a string, plus one for a trailing null byte, + plus one for a sign. */ +#define MAX_INT_LENGTH 21 + +/* Printer's points, as defined by TeX (and good typesetters everywhere). */ +#define POINTS_PER_INCH 72.27 + +/* Convert a number V in pixels to printer's points, and vice versa, + assuming a resolution of DPI pixels per inch. */ +#define PIXELS_TO_POINTS(v, dpi) (POINTS_PER_INCH * (v) / (dpi)) +#define POINTS_TO_REAL_PIXELS(v, dpi) ((v) * (dpi) / POINTS_PER_INCH) +#define POINTS_TO_PIXELS(v, dpi) ((int) (POINTS_TO_REAL_PIXELS (v, dpi) + .5)) + +/* Some simple numeric operations. It is possible to define these much + more cleanly in GNU C, but we haven't done that (yet). */ +#define SQUARE(x) ((x) * (x)) +#define CUBE(x) ((x) * (x) * (x)) +#define SAME_SIGN(u,v) ((u) >= 0 && (v) >= 0 || (u) < 0 && (v) < 0) +#define SIGN(x) ((x) > 0 ? 1 : (x) < 0 ? -1 : 0) +#define SROUND(x) ((int) ((int) (x) + .5 * SIGN (x))) + +#ifndef MAX +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#endif +#ifndef MIN +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#endif + +/* Too bad C doesn't define operators for these. */ +#define MAX_EQUALS(var, expr) if ((expr) > (var)) (var) = (expr) +#define MIN_EQUALS(var, expr) if ((expr) < (var)) (var) = (expr) + +#define STREQ(s1, s2) (strcmp (s1, s2) == 0) + +/* Declarations for commonly-used routines we provide ourselves. The + ones here are only needed by us, so we do not provide them in + unprototyped form. Others are declared both ways in lib.h. */ + +#if 0 /* These aren't actually defined anywhere */ +/* Return the current date and time a la date(1). */ +extern string now (void); + +/* Check if a string is a valid floating-point or decimal integer. + Returns false if passed NULL. */ +extern boolean float_ok (string); +extern boolean integer_ok (string); + +/* Like `atoi', but disallow negative numbers. */ +extern const unsigned atou (string); + +/* The converses of atoi, atou, and atof. These all return dynamically + allocated strings. `dtoa' is so-named because `ftoa' is a library + function on some systems (the IBM RT), and the loader complains that + is defined twice, for reasons I don't understand. */ +extern string itoa (int); +extern string utoa (unsigned); +extern string dtoa (double); + +#endif + +/* Like their stdio counterparts, but abort on error, after calling + perror(3) with FILENAME as its argument. */ +/* extern FILE *xfopen (string filename, string mode); */ +/* extern void xfclose (FILE *, string filename); */ +/* extern void xfseek (FILE *, long, int, string filename); */ +/* extern four_bytes xftell (FILE *, string filename); */ + +/* Copies the file FROM to the file TO, then unlinks FROM. */ +extern void xrename (string from, string to); + +/* Return NAME with any leading path stripped off. This returns a + pointer into NAME. */ +/* ALT extern string basename (string name); */ + + + +/* If P or *P is null, abort. Otherwise, call free(3) on P, + and then set *P to NULL. */ +extern void safe_free (address *p); + + +/* Math functions. */ + +/* Says whether V1 and V2 are within REAL_EPSILON of each other. + Fixed-point arithmetic would be better, to guarantee machine + independence, but it's so much more painful to work with. The value + here is smaller than can be represented in either a `fix_word' or a + `scaled_num', so more precision than this will be lost when we + output, anyway. */ +#define REAL_EPSILON 0.00001 +extern boolean epsilon_equal (real v1, real v2); + +/* Arc cosine, in degrees. */ +extern real my_acosd (real); + +/* Return the Euclidean distance between the two points. */ +extern real distance (real_coordinate_type, real_coordinate_type); +extern real int_distance (coordinate_type, coordinate_type); + +/* Slope between two points (delta y per unit x). */ +extern real slope (real_coordinate_type, real_coordinate_type); + +/* Make a real coordinate from an integer one, and vice versa. */ +extern real_coordinate_type int_to_real_coord (coordinate_type); +extern coordinate_type real_to_int_coord (real_coordinate_type); + +/* Test if two integer points are adjacent. */ +extern boolean points_adjacent_p (int row1, int col1, int r2, int c2); + +/* Find the largest and smallest elements of an array. */ +extern void find_bounds (real values[], unsigned value_count, + /* returned: */ real *the_min, real *the_max); + +/* Make all the elements in the array between zero and one. */ +extern real *map_to_unit (real * values, unsigned value_count); + + +/* String functions. */ + +/* Return (a fresh copy of) SOURCE beginning at START and ending at + LIMIT. (Or NULL if LIMIT < START.) */ +extern string substring (string source, const unsigned start, + const unsigned limit); + +/* Change all uppercase letters in S to lowercase. */ +extern string lowercasify (string s); + + +/* Character code parsing. */ + +/* If the string S parses as a character code, this sets *VALID to + `true' and returns the number. If it doesn't, it sets *VALID to + `false' and the return value is garbage. + + We allow any of the following possibilities: a single character, as in + `a' or `0'; a decimal number, as in `21'; an octal number, as in `03' + or `0177'; a hexadecimal number, as in `0x3' or `0xff'. */ +extern charcode_type parse_charcode (string s, boolean *valid); + +/* Like `parse_charcode', but gives a fatal error if the string isn't a + valid character code. */ +extern charcode_type xparse_charcode (string s); + +/* The environment variable name with which to look up auxiliary files. */ +#ifndef LIB_ENVVAR +#define LIB_ENVVAR "FONTUTIL_LIB" +#endif + +#endif /* not GLOBAL_H */ |