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abcMIDI-2020.07.06.zip
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Seymour Shlien
240
structs.h
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240
structs.h
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/* structs.h */
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/* Part of YAPS - abc to PostScript converter */
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/* Copyright James Allwright 2000 */
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/* May be copied under the terms of the GNU public license */
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/* definitions of structures used to hold abc tune data */
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/* The voice data structure also holds various state variables */
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/* to allow processing of voice data as it is read in */
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enum tail_type {nostem, single, startbeam, midbeam, endbeam};
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/* holds a fraction */
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struct fract {
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int num;
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int denom;
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};
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extern void reducef(struct fract *f);
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extern void setfract(struct fract *f, int a, int b);
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/* holds a key signature */
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struct key {
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char* name;
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int sharps;
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char map[7];
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int mult[7];
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};
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/* holds a tempo specifier */
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struct atempo {
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int count;
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struct fract basenote;
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int relative;
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char *pre;
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char *post;
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};
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/* holds a general tuple specifier */
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struct tuple {
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int n;
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int q;
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int r;
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int label;
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int beamed;
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float height;
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};
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/* data relating to a chord */
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struct chord {
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int ytop;
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int ybot;
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enum tail_type beaming;
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float stemlength;
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int stemup;
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int base;
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int base_exp;
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};
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/* elemental unit of a linked list */
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struct el {
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struct el* next;
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void* datum;
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};
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/* high-level structure for linked list */
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struct llist {
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struct el* first;
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struct el* last;
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struct el* place;
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};
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/* all information relating to a note */
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struct note {
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char* accents;
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char accidental;
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int fliphead;
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int acc_offset;
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int mult;
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int octave;
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char pitch;
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int tuplenotes;
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int y;
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int base_exp;
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int base;
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int dots;
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int stemup;
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enum tail_type beaming;
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struct llist* syllables;
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struct llist* gchords;
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struct llist* instructions;
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struct fract len;
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float stemlength;
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};
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struct dynamic {
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char color;
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};
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/* elemental unit of a voice list */
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/* item points to a note, bar-line or other feature */
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struct feature {
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struct feature* next;
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featuretype type;
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float xleft, xright, ydown, yup;
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float x;
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void* item;
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};
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/* structure used by both slurs and ties */
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struct slurtie {
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struct feature* begin;
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struct feature* end;
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int crossline;
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};
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enum cleftype {noclef, treble, soprano, mezzo, alto, tenor, baritone, bass};
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enum linestate {header, midline, newline};
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struct aclef {
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enum cleftype type;
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int octave;
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};
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/* holds calculated vertical spacing for one stave line */
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/* associated with PRINTLINE */
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struct vertspacing {
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float height;
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float descender;
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float yend;
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float yinstruct;
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float ygchord;
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float ywords;
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};
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/* all variables relating to one voice */
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#define MAX_TIES 20
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#define MAX_SLURS 20
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struct voice {
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struct feature* first;
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struct feature* last;
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int voiceno;
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int octaveshift;
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int changetime;
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struct fract unitlen;
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struct fract tuplefactor;
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int tuplenotes;
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struct tuple* thistuple;
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int inslur, ingrace;
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int inchord, chordcount;
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struct fract chord;
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struct fract barlen;
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struct fract barcount;
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int barno;
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int barchecking;
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int expect_repeat;
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int brokentype, brokenmult, brokenpending;
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int tiespending;
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struct feature* tie_place[MAX_TIES];
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int tie_status[MAX_TIES];
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int slurpending;
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int slurcount;
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struct slurtie* slur_place[MAX_SLURS];
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struct feature* lastnote;
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struct feature* laststart;
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struct feature* lastend;
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int more_lyrics;
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int lyric_errors;
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struct feature* thisstart;
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struct feature* thisend;
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struct llist* gchords_pending;
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struct llist* instructions_pending;
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/* variables to handle tuples */
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int beamed_tuple_pending;
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int tuple_count;
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int tuplelabel;
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float tuple_xstart;
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float tuple_xend;
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float tuple_height;
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/* variables for assigning syllables to notes */
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struct feature* linestart;
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struct feature* lineend;
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struct chord* thischord;
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struct feature* chordplace;
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enum linestate line;
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/* following fields are initially inherited from tune */
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struct aclef* clef;
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struct key* keysig;
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struct fract meter;
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struct atempo* tempo;
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/* place used while printing to keep track of progress through voice */
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struct feature* lineplace;
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int atlineend;
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struct feature* place;
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int inmusic;
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struct fract time;
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/* following are used to determine stem direction of beamed set */
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struct feature* beamroot;
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struct feature* beamend;
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struct feature* gracebeamroot;
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struct feature* gracebeamend;
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int beammin, beammax;
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};
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/* structure for the entire tune */
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struct tune {
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int no; /* from X: field */
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int octaveshift;
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struct llist title;
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char* composer;
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char* origin;
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char* parts;
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struct llist notes;
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struct fract meter;
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int barchecking;
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struct key* keysig;
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struct atempo* tempo;
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struct llist voices;
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struct voice* cv;
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struct fract unitlen;
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struct aclef clef;
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struct llist words;
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};
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/* structure for a rest */
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struct rest {
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struct fract len;
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int base_exp;
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int base;
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int dots;
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int multibar; /* 0 indicates normal rest */
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struct llist* gchords;
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struct llist* instructions;
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};
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/* list manipulation functions */
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void init_llist(struct llist* l);
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struct llist* newlist();
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void addtolist(struct llist* p, void* item);
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void* firstitem(struct llist* p);
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void* nextitem(struct llist* p);
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void freellist(struct llist* l);
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