/*
Copyright (c) 2006 Taco Hoekwater <taco@elvenkind.com>

This file is part of MetaPost.

MetaPost 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 2 of the License, or
(at your option) any later version.

MetaPost 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 MetaPost; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

$Id $
*/

#ifndef MPOSTMAC
#  define MPOSTMAC

/* Not all systems define it. */
#  ifndef M_PI
#    define M_PI           3.14159265358979323846
                                                /* pi */
#    define M_PI_2         1.5707963267948966192E0
                                                /*Hex  2^ 0 * 1.921FB54442D18 */
#    define M_PI_4         7.8539816339744830962E-1
                                                /*Hex  2^-1 * 1.921FB54442D18 */
#  endif

#  ifdef WIN32
// Why relying on gmalloc() ???
#    define gmalloc(n) xmalloc(n)
#    define gfree(p) free(p)
#    define inline __inline
#    define srandom(n) srand(n)
#    define random() rand()
#  endif

/* Pascal WEB macros */
#  define maxinteger 0x7FFFFFFF
#  define maxdimen   0x3FFFFFFF

#  define objinfo(n) objtab[n].int0

#  define pdfroom(n) do {                                      \
    if ((unsigned)(n + pdfptr) > (unsigned)pdfbufsize) {     \
        if (pdfosmode)                                       \
            zpdfosgetosbuf(n);                               \
        else {                                               \
            if ((unsigned)(n) > (unsigned)pdfbufsize)        \
                pdftex_fail("PDF output buffer overflowed"); \
            else                                             \
                pdfflush();                                  \
        }                                                    \
    }                                                        \
} while (0)

#  define pdfout(c)  do {   \
    pdfroom(1);           \
    pdfbuf[pdfptr++] = c; \
} while (0)

#  define pdfoffset()     (pdfgone + pdfptr)
#  define pdfinitfont(f)  {tmpf = f; pdfcreatefontobj();}

#  define MAX_CHAR_CODE       255
#  define PRINTF_BUF_SIZE     1024
#  define MAX_CSTRING_LEN     1024 * 1024
#  define MAX_PSTRING_LEN     1024
#  define SMALL_BUF_SIZE      256
#  define SMALL_ARRAY_SIZE    256
#  define FONTNAME_BUF_SIZE   128
                                /* a PDF name can be maximum 127 chars long */

#  define pdftex_debug    tex_printf

#  define check_buf(size, buf_size)                          \
    if ((unsigned)(size) > (unsigned)(buf_size))                               \
      pdftex_fail("buffer overflow: (%d,%d) at file %s, line %d",size,buf_size, __FILE__,  __LINE__ )

#  define append_char_to_buf(c, p, buf, buf_size) do {       \
    if (c == 9)                                            \
        c = 32;                                            \
    if (c == 13 || c == EOF)                               \
        c = 10;                                            \
    if (c != ' ' || (p > buf && p[-1] != 32)) {            \
        check_buf(p - buf + 1, (buf_size));                \
        *p++ = c;                                          \
    }                                                      \
} while (0)

#  define append_eol(p, buf, buf_size) do {                  \
    check_buf(p - buf + 2, (buf_size));                    \
    if (p - buf > 1 && p[-1] != 10)                        \
        *p++ = 10;                                         \
    if (p - buf > 2 && p[-2] == 32) {                      \
        p[-2] = 10;                                        \
        p--;                                               \
    }                                                      \
    *p = 0;                                                \
} while (0)

#  define remove_eol(p, buf) do {                            \
    p = strend(buf) - 1;                                   \
    if (*p == 10)                                          \
        *p = 0;                                            \
} while (0)

#  define skip(p, c)   if (*p == c)  p++

#  define alloc_array(T, n, s) do {                           \
    if (T##_array == NULL) {                                \
        T##_limit = (s);                                    \
        if ((unsigned)(n) > T##_limit)                      \
            T##_limit = (n);                                \
        T##_array = xtalloc(T##_limit, T##_entry);          \
        T##_ptr = T##_array;                                \
    }                                                       \
    else if ((unsigned)(T##_ptr - T##_array + (n)) > T##_limit) {       \
        last_ptr_index = T##_ptr - T##_array;               \
        T##_limit *= 2;                                     \
        if ((unsigned)(T##_ptr - T##_array + (n)) > T##_limit)          \
            T##_limit = T##_ptr - T##_array + (n);          \
        xretalloc(T##_array, T##_limit, T##_entry);         \
        T##_ptr = T##_array + last_ptr_index;               \
    }                                                       \
} while (0)

#  define is_cfg_comment(c) \
    (c == 10 || c == '*' || c == '#' || c == ';' || c == '%')

#  define define_array(T)                     \
T##_entry      *T##_ptr, *T##_array = NULL;    \
size_t          T##_limit

#  define xfree(p)            do { if (p != NULL) free(p); p = NULL; } while (0)
#  define strend(s)           strchr(s, 0)
#  define xtalloc             XTALLOC
#  define xretalloc           XRETALLOC

#  define ASCENT_CODE         0
#  define CAPHEIGHT_CODE      1
#  define DESCENT_CODE        2
#  define FONTNAME_CODE       3
#  define ITALIC_ANGLE_CODE   4
#  define STEMV_CODE          5
#  define XHEIGHT_CODE        6
#  define FONTBBOX1_CODE      7
#  define FONTBBOX2_CODE      8
#  define FONTBBOX3_CODE      9
#  define FONTBBOX4_CODE      10
#  define MAX_KEY_CODE        (FONTBBOX1_CODE + 1)
#  define FONT_KEYS_NUM       (FONTBBOX4_CODE + 1)

#  define F_INCLUDED          0x01
#  define F_SUBSETTED         0x02
#  define F_TRUETYPE          0x04
#  define F_BASEFONT          0x08
#  define F_SUBFONT           0x10

#  define set_included(fm)    ((fm)->type |= F_INCLUDED)
#  define set_subsetted(fm)   ((fm)->type |= F_SUBSETTED)
#  define set_truetype(fm)    ((fm)->type |= F_TRUETYPE)
#  define set_basefont(fm)    ((fm)->type |= F_BASEFONT)
#  define set_subfont(fm)     ((fm)->type |= F_SUBFONT)

#  define unset_included(fm)  ((fm)->type &= ~F_INCLUDED)
#  define unset_subsetted(fm) ((fm)->type &= ~F_SUBSETTED)
#  define unset_truetype(fm)  ((fm)->type &= ~F_TRUETYPE)
#  define unset_basefont(fm)  ((fm)->type &= ~F_BASEFONT)
#  define unset_subfont(fm)   ((fm)->type &= ~F_SUBFONT)

#  define unset_fontfile(fm)  xfree((fm)->ff_name)

#  define is_included(fm)     ((fm)->type & F_INCLUDED)
#  define is_subsetted(fm)    ((fm)->type & F_SUBSETTED)
#  define is_truetype(fm)     ((fm)->type & F_TRUETYPE)
#  define is_basefont(fm)     ((fm)->type & F_BASEFONT)
#  define is_subfont(fm)      ((fm)->type & F_SUBFONT)
#  define no_font_desc(fm)    (is_basefont(fm) && !is_included(fm))

#  define fm_slant(fm)        (fm)->slant
#  define fm_extend(fm)       (fm)->extend
#  define fm_fontfile(fm)     (fm)->ff_name

#  define is_reencoded(fm)    ((fm)->encoding != NULL)
#  define is_fontfile(fm)     (fm_fontfile(fm) != NULL)
#  define is_t1fontfile(fm)   (is_fontfile(fm) && !is_truetype(fm))

#  define LINK_TFM            0x01
#  define LINK_PS             0x02
#  define set_tfmlink(fm)     ((fm)->links |= LINK_TFM)
#  define set_pslink(fm)      ((fm)->links |= LINK_PS)
#  define unset_tfmlink(fm)   ((fm)->links &= ~LINK_TFM)
#  define unset_pslink(fm)    ((fm)->links &= ~LINK_PS)
#  define has_tfmlink(fm)     ((fm)->links & LINK_TFM)
#  define has_pslink(fm)      ((fm)->links & LINK_PS)


#  define set_cur_file_name(s)      \
    cur_file_name = s;      \
    packfilename(maketexstring(cur_file_name), getnullstr(), getnullstr())

#  define cmp_return(a, b) \
    if (a > b)           \
        return 1;        \
    if (a < b)           \
        return -1

#  define str_prefix(s1, s2)  (strncmp((s1), (s2), strlen(s2)) == 0)

#endif                          /* MPOSTMAC */
