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Annotation of researchv10dc/cmd/eqn/tuning.c, revision 1.1

1.1     ! root        1: #include "e.h"
        !             2: 
        !             3: /*
        !             4: 
        !             5: This file contains parameter values for many of the
        !             6: tuning parameters in eqn.  Names are defined words.
        !             7: 
        !             8: Strings are plugged in verbatim.
        !             9: Floats are usually in ems.
        !            10: 
        !            11: */
        !            12: 
        !            13: /* In main.c: */
        !            14: 
        !            15: double BeforeSub = 1.2;        /* line space before a subscript */
        !            16: double AfterSub  = 0.2;        /* line space after a subscript */
        !            17: 
        !            18: /* diacrit.c: */
        !            19: 
        !            20: double Dvshift = 0.25;         /* vertical shift for diacriticals on tall letters */
        !            21: double Dhshift = 0.025;        /* horizontal shift for tall letters */
        !            22: double Dh2shift = 0.05;        /* horizontal shift for small letters */
        !            23: double Dheight = 0.25;         /* increment to height for diacriticals */
        !            24: double Barv    = 0.68;         /* vertical shift for bar */
        !            25: double Barh    = 0.05;         /* 1/2 horizontal shrink for bar */
        !            26: double Ubarv   = 0.1;          /* shift underbar up this much ems */
        !            27: 
        !            28: /* Also:
        !            29:        Vec, Dyad, Hat, Tilde, Dot, Dotdot, Utilde */
        !            30: 
        !            31: /* eqnbox.c: */
        !            32: 
        !            33: char   *IRspace = "\\^";       /* space between italic & roman boxes */
        !            34: 
        !            35: /* fat.c: */
        !            36: 
        !            37: double Fatshift = 0.05;        /* fattening shifts by Fatshift ems */
        !            38: 
        !            39: /* funny.c: */
        !            40: 
        !            41: int    Funnyps = 5;            /* point size change (== 5 above) */
        !            42: double Funnyht = 0.2;          /* height correction */
        !            43: double Funnybase = 0.3;        /* base correction */
        !            44: 
        !            45: /* integral.c: */
        !            46: 
        !            47: int    Intps   = 4;            /* point size change for integral (== 4 above) */
        !            48: double Intht   = 1.15;         /* ht of integral in ems */
        !            49: double Intbase = 0.3;          /* base in ems */
        !            50: double Int1h   = 0.4;          /* lower limit left */
        !            51: double Int1v   = 0.2;          /* lower limit down */
        !            52: double Int2h   = 0.05;         /* upper limit right was 8 */
        !            53: double Int2v   = 0.1;          /* upper limit up */
        !            54: 
        !            55: /* matrix.c: */
        !            56: 
        !            57: char   *Matspace = "\\ \\ ";   /* space between matrix columns */
        !            58: 
        !            59: /* over.c: */
        !            60: 
        !            61: double Overgap = 0.3;          /* gap between num and denom */
        !            62: double Overwid = 0.5;          /* extra width of box */
        !            63: double Overline = 0.1;         /* extra length of fraction bar */
        !            64: 
        !            65: /* paren.c* */
        !            66: 
        !            67: double Parenbase = 0.4;        /* shift of base for even count */
        !            68: double Parenshift = 0.13;      /* how much to shift parens down in left ... */
        !            69:                                /* ignored unless postscript */
        !            70: double Parenheight = 0.3;      /* extra height above builtups */
        !            71: 
        !            72: /* pile.c: */
        !            73: 
        !            74: double Pilegap = 0.4;          /* gap between pile elems */
        !            75: double Pilebase = 0.5;         /* shift base of even # of piled elems */
        !            76: 
        !            77: /* shift.c: */
        !            78: 
        !            79: double Subbase = 0.2;          /* subscript base belowe main base */
        !            80: double Supshift = 0.4;         /* superscript .4 up main box */
        !            81: char   *Sub1space = "\\|";     /* italic sub roman space */
        !            82: char   *Sup1space = "\\|";     /* italic sup roman space */
        !            83: char   *Sub2space = "\\^";     /* space after subscripted thing */
        !            84: char   *SS1space = "\\^";      /* space before sub in x sub i sup j */
        !            85: char   *SS2space = "\\^";      /* space before sup */
        !            86: 
        !            87: /* sqrt.c: */
        !            88:        /* sqrt is hard!  punt for now. */
        !            89:        /* part of the problem is that every typesetter does it differently */
        !            90:        /* and we have several typesetters to run. */
        !            91: 
        !            92: /* text.c: */
        !            93:        /* ought to be done by a table */
        !            94: 
        !            95: struct tune {
        !            96:        char    *name;
        !            97:        char    *cval;
        !            98: } tune[]       ={
        !            99:   /* diacrit.c */
        !           100:        "vec_def",      "\\f1\\v'-.5m'\\s-3\\(->\\s0\\v'.5m'\\fP",      /* was \s-2 & .45m */
        !           101:        "dyad_def",     "\\f1\\v'-.5m'\\s-3\\z\\(<-\\|\\(->\\s0\\v'.5m'\\fP",
        !           102:        "hat_def",      "\\f1\\v'-.05m'\\s+1^\\s0\\v'.05m'\\fP",        /* was .1 */
        !           103:        "tilde_def",    "\\f1\\v'-.05m'\\s+1~\\s0\\v'.05m'\\fP",
        !           104:        "dot_def",      "\\f1\\v'-.67m'.\\v'.67m'\\fP",
        !           105:        "dotdot_def",   "\\f1\\v'-.67m'..\\v'.67m'\\fP",
        !           106:        "utilde_def",   "\\f1\\v'1.0m'\\s+2~\\s-2\\v'-1.0m'\\fP",
        !           107:   /* funny.c */
        !           108:        "sum_def",      "\\|\\v'.3m'\\s+5\\(*S\\s-5\\v'-.3m'\\|",
        !           109:        "union_def",    "\\|\\v'.3m'\\s+5\\(cu\\s-5\\v'-.3m'\\|",
        !           110:        "inter_def",    "\\|\\v'.3m'\\s+5\\(ca\\s-5\\v'-.3m'\\|",
        !           111:        "prod_def",     "\\|\\v'.3m'\\s+5\\(*P\\s-5\\v'-.3m'\\|",
        !           112:   /* integral.c */
        !           113:        "int_def",      "\\v'.1m'\\s+4\\(is\\s-4\\v'-.1m'",
        !           114:        0, 0
        !           115: };
        !           116: 
        !           117: tbl    *ftunetbl[TBLSIZE];     /* user-defined names */
        !           118: 
        !           119: char *ftunes[] ={      /* this table intentionally left small */
        !           120:        "Subbase",
        !           121:        "Supshift",
        !           122:        0
        !           123: };
        !           124: 
        !           125: void init_tune(void)
        !           126: {
        !           127:        int i;
        !           128: 
        !           129:        for (i = 0; tune[i].name != NULL; i++)
        !           130:                install(deftbl, tune[i].name, tune[i].cval, 0);
        !           131:        for (i = 0; ftunes[i] != NULL; i++)
        !           132:                install(ftunetbl, ftunes[i], (char *) 0, 0);
        !           133: }
        !           134: 
        !           135: #define eq(s, t) (strcmp(s,t) == 0)
        !           136: 
        !           137: void ftune(char *s, char *t)   /* brute force for now */
        !           138: {
        !           139:        double f = atof(t);
        !           140:        double *target;
        !           141: 
        !           142:        while (*t == ' ' || *t == '\t')
        !           143:                t++;
        !           144:        if (eq(s, "Subbase"))
        !           145:                target = &Subbase;
        !           146:        else if (eq(s, "Supshift"))
        !           147:                target = &Supshift;
        !           148:        if (t[0] == '+' || t[0] == '-')
        !           149:                *target += f;
        !           150:        else
        !           151:                *target = f;
        !           152: }

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