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|
/*
* Gregorio is a program that translates gabc files to GregorioTeX.
* This file contains functions that deal with lyrics and styles.
*
* Copyright (C) 2008-2015 The Gregorio Project (see CONTRIBUTORS.md)
*
* This file is part of Gregorio.
*
* Gregorio 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 of the License, or
* (at your option) any later version.
*
* Gregorio 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 Gregorio. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief This file contains almost all the gregorio_character manipulation things.
*
* @warning The code is very spaghetti, but I don't really think I can do it another way with the chosen representation of styles, and the fact that everything must be xml-compliant and tex-compliant...
* So this file is basically very hard to maintain. Moreover, it has not been very well coded, so it is even harder to maintain...
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <assert.h>
#include "bool.h"
#include "struct.h"
#include "unicode.h"
#include "characters.h"
#include "messages.h"
#include "support.h"
#include "utf8strings.h"
#include "vowel/vowel.h"
#define VOWEL_FILE "gregorio-vowels.dat"
static bool read_vowel_rules(char *const lang) {
char *language = lang;
rulefile_parse_status status = RFPS_NOT_FOUND;
char **filenames, *filename, **p;
const char *description;
int tries;
gregorio_kpse_find_or_else(filenames, VOWEL_FILE, return false);
gregorio_vowel_tables_init();
/* only need to try twice; if it's not resolved by then, there is an alias
* loop */
for (tries = 0; tries < 2; ++tries) {
for (p = filenames; status != RFPS_FOUND && (filename = *p); ++p) {
/* read and parse the file */
gregorio_messagef("read_rules", VERBOSITY_INFO, 0,
_("Looking for %s in %s"), language, filename);
gregorio_vowel_tables_load(filename, &language, &status);
switch (status) {
case RFPS_FOUND:
description = "Found";
break;
case RFPS_ALIASED:
description = "Aliased to";
break;
default:
description = "Could not find";
break;
}
gregorio_messagef("read_rules", VERBOSITY_INFO, 0, _("%s %s in %s"),
description, language, filename);
}
if (status != RFPS_ALIASED) {
/* if it's not aliased, there's no reason to scan again */
break;
}
}
if (status == RFPS_ALIASED) {
gregorio_messagef("read_rules", VERBOSITY_WARNING, 0,
_("Unable to resolve alias for %s"), lang);
}
/* free the allocated memory */
for (p = filenames; *p; ++p) {
free(*p);
}
free(filenames);
if (language != lang) {
free(language);
}
return status == RFPS_FOUND;
}
void gregorio_set_centering_language(char *const language)
{
if (!read_vowel_rules(language)) {
if (strcmp(language, "Latin") != 0) {
gregorio_messagef("gregorio_set_centering_language",
VERBOSITY_WARNING, 0, _("unable to read vowel files for "
"%s; defaulting to Latin rules"), language);
}
gregorio_vowel_tables_init();
gregorio_vowel_table_add(DEFAULT_VOWELS);
gregorio_prefix_table_add("i");
gregorio_prefix_table_add("I");
gregorio_prefix_table_add("u");
gregorio_prefix_table_add("U");
}
}
static __inline gregorio_character *skip_verbatim_or_special(
gregorio_character *ch)
{
/* skip past verbatim and special characters */
if (ch->cos.s.type == ST_T_BEGIN && (ch->cos.s.style == ST_VERBATIM
|| ch->cos.s.style == ST_SPECIAL_CHAR)) {
if (ch->next_character) {
ch = ch->next_character;
}
while (ch->next_character && ch->is_character) {
ch = ch->next_character;
}
}
return ch;
}
static __inline bool handle_elision(const gregorio_character *const ch,
bool *in_elision)
{
if (ch->cos.s.style != ST_ELISION) {
return false;
}
switch (ch->cos.s.type) {
case ST_T_BEGIN:
*in_elision = true;
break;
case ST_T_END:
*in_elision = false;
break;
case ST_T_NOTHING:
/* not reachable unless there's a programming error */
assert(false); /* LCOV_EXCL_LINE */
break;
}
return true;
}
static void determine_center(gregorio_character *character, int *start,
int *end)
{
int count;
grewchar *subject;
gregorio_character *ch;
bool in_elision;
*start = *end = -1;
in_elision = false;
for (count = 0, ch = character; ch; ch = ch->next_character) {
if (ch->is_character) {
if (!in_elision) {
++count;
}
} else if (!handle_elision(ch, &in_elision)) {
ch = skip_verbatim_or_special(ch);
}
}
if (count == 0) {
return;
}
in_elision = false;
subject = (grewchar *)gregorio_malloc((count + 1) * sizeof(grewchar));
for (count = 0, ch = character; ch; ch = ch->next_character) {
if (ch->is_character) {
if (!in_elision) {
subject[count ++] = ch->cos.character;
}
} else if (!handle_elision(ch, &in_elision)) {
ch = skip_verbatim_or_special(ch);
}
}
subject[count] = (grewchar)0;
gregorio_find_vowel_group(subject, start, end);
free(subject);
}
static bool go_to_end_initial(gregorio_character **param_character)
{
bool has_initial = false;
gregorio_character *current_character = *param_character;
if (!current_character) {
return false;
}
gregorio_go_to_first_character_c(¤t_character);
/* skip past any initial */
if (!current_character->is_character
&& current_character->cos.s.type == ST_T_BEGIN
&& current_character->cos.s.style == ST_INITIAL) {
has_initial = true;
while (current_character) {
if (!current_character->is_character
&& current_character->cos.s.type == ST_T_END
&& current_character->cos.s.style == ST_INITIAL) {
break;
}
current_character = current_character->next_character;
}
}
(*param_character) = current_character;
return has_initial;
}
/*
* The push function pushes a style in the stack, and updates first_style to
* this element.
*/
static void style_push(det_style **current_style, grestyle_style style)
{
det_style *element;
gregorio_assert(current_style, style_push, "current_style may not be NULL",
return);
element = (det_style *) gregorio_malloc(sizeof(det_style));
element->style = style;
element->previous_style = NULL;
element->next_style = (*current_style);
if (*current_style) {
(*current_style)->previous_style = element;
}
(*current_style) = element;
}
/*
* Pop deletes an style in the stack (the style to delete is the parameter)
*/
static void style_pop(det_style **first_style, det_style *element)
{
gregorio_assert(element && first_style && *first_style, style_pop,
"invalid arguments", return);
if (element->previous_style) {
assert(*first_style != element);
element->previous_style->next_style = element->next_style;
if (element->next_style) {
element->next_style->previous_style = element->previous_style;
}
} else {
if (element->next_style) {
element->next_style->previous_style = NULL;
(*first_style) = element->next_style;
} else {
(*first_style) = NULL;
}
}
free(element);
}
/*
* free_styles just frees the stack.
*/
static void free_styles(det_style **first_style)
{
det_style *current_style;
gregorio_not_null(first_style, free_styles, return);
current_style = (*first_style);
while (current_style) {
current_style = current_style->next_style;
free((*first_style));
(*first_style) = current_style;
}
}
/*
* inline function that will be used for verbatim and special-characters in the
*
* next function, it calls function with a grewchar * which is the verbatim or
* special-character. It places current_character to the character next to the
* end of the verbatim or special_char charachters.
*/
static __inline void verb_or_sp(const gregorio_character **ptr_character,
const grestyle_style style, FILE *const f,
void (*const function) (FILE *, const grewchar *))
{
int i, j;
grewchar *text;
const gregorio_character *current_character;
const gregorio_character *begin_character;
i = 0;
j = 0;
current_character = (*ptr_character)->next_character;
begin_character = current_character;
while (current_character) {
if (current_character->cos.s.type == ST_T_END
&& current_character->cos.s.style == style) {
break;
} else {
if (current_character->is_character) {
i++;
}
current_character = current_character->next_character;
}
}
if (i == 0) {
*ptr_character = current_character;
return;
}
text = (grewchar *) gregorio_malloc((i + 1) * sizeof(grewchar));
current_character = begin_character;
while (j < i) {
if (current_character->is_character) {
text[j] = current_character->cos.character;
j++;
}
current_character = current_character->next_character;
}
text[i] = 0;
function(f, text);
free(text);
*ptr_character = current_character;
}
/**
* This function is made to simplify the output modules : they just have to
* declare some simple functions (what to do when meeting a beginning of style,
* a character, etc.) and to call this function with pointer to these
* functions, and that will automatically write the good ouput. This function
* does not test at all the gregorio_character list, if it is wrong, then the
* ouput will be wrong. It is very simple to understand, even if it is a bit
* long.
*
* @warning The difficulty comes when we have to write the first syllable text,
* without the first letter.
* The behaviour can have some bugs in this case if the first syllable has some
* complex styles. It would be a bit stupid to do such a thing, but users are
* usually very creative when it comes to inventing twisted things...
*/
void gregorio_write_text(const gregorio_write_text_phase phase,
const gregorio_character *current_character, FILE *const f,
void (*const printverb) (FILE *, const grewchar *),
void (*const printchar) (FILE *, grewchar),
void (*const begin) (FILE *, grestyle_style),
void (*const end) (FILE *, grestyle_style),
void (*const printspchar) (FILE *, const grewchar *))
{
gregorio_assert(current_character, gregorio_write_text,
"current_character may not be NULL", return);
while (current_character) {
if (current_character->is_character) {
printchar(f, current_character->cos.character);
} else {
if (current_character->cos.s.type == ST_T_BEGIN) {
switch (current_character->cos.s.style) {
case ST_VERBATIM:
verb_or_sp(¤t_character, ST_VERBATIM, f, printverb);
break;
case ST_SPECIAL_CHAR:
verb_or_sp(¤t_character, ST_SPECIAL_CHAR, f,
printspchar);
break;
case ST_INITIAL:
if (phase == WTP_FIRST_SYLLABLE) {
while (current_character) {
if (!current_character->is_character
&& current_character->cos.s.type == ST_T_END
&& current_character->cos.s.style ==
ST_INITIAL) {
break;
}
current_character =
current_character->next_character;
}
} else {
begin(f, ST_INITIAL);
}
break;
default:
begin(f, current_character->cos.s.style);
break;
}
} else { /* ST_T_END */
end(f, current_character->cos.s.style);
}
}
if (current_character) {
current_character = current_character->next_character;
}
}
}
void gregorio_write_first_letter_alignment_text(
const gregorio_write_text_phase phase,
const gregorio_character *current_character, FILE *const f,
void (*const printverb) (FILE *, const grewchar *),
void (*const printchar) (FILE *, grewchar),
void (*const begin) (FILE *, grestyle_style),
void (*const end) (FILE *, grestyle_style),
void (*const printspchar) (FILE *, const grewchar *))
{
/* stack of styles to close and reopen */
det_style *first_style = NULL;
det_style *last_style = NULL;
int first_letter_open = (phase == WTP_FIRST_SYLLABLE)? 2 : 1;
gregorio_assert(current_character,
gregorio_write_first_letter_alignment_text,
"current_character may not be NULL", return);
/* go to the first character */
gregorio_go_to_first_character(¤t_character);
if (phase != WTP_FIRST_SYLLABLE) {
begin(f, ST_SYLLABLE_INITIAL);
}
/* loop until there are no characters left */
for (; current_character;
current_character = current_character->next_character) {
bool close_first_letter = false;
/* found a real character */
if (current_character->is_character) {
printchar(f, current_character->cos.character);
close_first_letter = first_letter_open != 0;
} else switch (current_character->cos.s.type) {
case ST_T_NOTHING:
/* not reachable unless there's a programming error */
assert(false); /* LCOV_EXCL_LINE */
break;
case ST_T_BEGIN:
/* handle styles */
switch (current_character->cos.s.style) {
case ST_CENTER:
case ST_FORCED_CENTER:
case ST_INITIAL:
case ST_FIRST_SYLLABLE_INITIAL:
/* ignore */
break;
case ST_VERBATIM:
verb_or_sp(¤t_character, ST_VERBATIM, f, printverb);
close_first_letter = first_letter_open != 0;
break;
case ST_SPECIAL_CHAR:
verb_or_sp(¤t_character, ST_SPECIAL_CHAR, f, printspchar);
close_first_letter = first_letter_open != 0;
break;
case ST_FIRST_WORD:
case ST_FIRST_SYLLABLE:
if (phase == WTP_FIRST_SYLLABLE) {
break;
} /* else fall through */
default:
/* push the style onto the stack */
style_push(&first_style, current_character->cos.s.style);
begin(f, current_character->cos.s.style);
}
break;
case ST_T_END:
switch (current_character->cos.s.style) {
case ST_CENTER:
case ST_FORCED_CENTER:
case ST_FIRST_SYLLABLE_INITIAL:
/* ignore */
break;
case ST_INITIAL:
/* in the case where the initial is closed before the first
* letter */
close_first_letter = first_letter_open > 1;
break;
case ST_VERBATIM:
case ST_SPECIAL_CHAR:
/* not reachable unless there's a programming error */
assert(false); /* LCOV_EXCL_LINE */
break;
case ST_FIRST_WORD:
case ST_FIRST_SYLLABLE:
if (phase == WTP_FIRST_SYLLABLE) {
break;
} /* else fall through */
default:
/* pop the style from the stack */
assert(first_style);
assert(first_style->style
== current_character->cos.s.style);
style_pop(&first_style, first_style);
end(f, current_character->cos.s.style);
}
break;
}
while (close_first_letter || (!current_character->next_character
&& first_letter_open > 0)) {
close_first_letter = false;
--first_letter_open;
/* close all the styles in the stack */
if (first_style) {
det_style *current_style;
/* these are immediately closed, so go past them */
while (first_style && current_character
&& current_character->next_character
&& !current_character->next_character->is_character
&& current_character->next_character->cos.s.type
== ST_T_END
&& current_character->next_character->cos.s.style
== first_style->style) {
current_character = current_character->next_character;
style_pop(&first_style, first_style);
end(f, current_character->cos.s.style);
}
for (current_style = first_style; current_style;
current_style = current_style->next_style) {
end(f, current_style->style);
last_style = current_style;
}
}
end(f, ST_SYLLABLE_INITIAL);
/* reopen all styles */
for (; last_style; last_style = last_style->previous_style) {
begin(f, last_style->style);
}
}
}
if (phase == WTP_FIRST_SYLLABLE) {
/* the only way this can happen is if the first syllable is empty,
* but if the first syllable is empty, this function will not be
* called */
gregorio_assert_only(!first_letter_open,
gregorio_write_first_letter_alignment_text,
"first_syllable was not closed properly");
}
free_styles(&first_style);
}
/*
* Here starts the code of the handling of text and styles.
*
* This part is not the easiest, in fact is is the most complicated. The reason
* is that I want to make something coherent in memory (easy to interprete),
* and to let the user type whatever he wants. This part was originally written
* for gabc, that's why it's always talking about it. But it could as well be
* used by other read plugins, to put things in order.
*
* Basically all the following lines of code are made for the last function,
* that will take a "user-written" gregorio_character list into a xml-compliant
* and tex-compliant list. It's more complicated than it seems...
*
* Functionalities: For example if the user types tt<i>ttt<b>ttt</i>tt I want
* it to be represented as tt<i>ttt<b>ttt</b></i><b>tt</b>. The fabulous thing
* is that it is xml-compliant. This part also determines the middle, for
* example pot will be interpreted as p{o}t. When I did that I also thought
* about TeX styles that needed things like {p}{o}{t}, so when the user types
* <i>pot</i>, it is interpreted as <i>p</i>{<i>o</i>}<i>t</i>.
*
* Internal structure: To do so we have a structure, det_style, that will help
* us : it is a stack (double chained list) of the styles that we have seen
* until now. When we encounter a <i>, we push the i style on the stack. If we
* encounter a </i> we suppress the i style from the stack. Let's take a more
* complex example: if we encounter <i><b></i>, the stack will be first null,
* then i then bi, and there we want to end i, but it is not the first style of
* the stack, so we close all the styles that we encounter before we encounter
* i (remember, this is for xml-compliance), so we insert a </b> before the
* </i>. But that's not all, we also write a <b> after the </i>, so that the b
* style continues. There our stack is just b. For center, we just close all
* the styles in the stack, insert a { and reopen all the styles in the stack.
*
* The structure used for character, styles, etc. is described in
* include/struct.h
*
* The functionment in this file is quite simple : we add all the characters
* that we see, even if they are incoherent, in the gregorio_character list,
* and then we call a very complex function that will build a stack of the
* style, determine the middle, make all xml-compliant, mow the lawn, etc.
*
* This code is *really* spaghetti, but I think it's a necessary pain.
*
*/
/*
*
* This function inserts a style before current_character, updating the double
* chained list.
*
*/
static void insert_style_before(unsigned char type,
unsigned char style, gregorio_character *current_character)
{
gregorio_character *element =
(gregorio_character *) gregorio_malloc(sizeof(gregorio_character));
element->is_character = 0;
element->cos.s.type = type;
element->cos.s.style = style;
element->next_character = current_character;
if (current_character->previous_character) {
current_character->previous_character->next_character = element;
}
element->previous_character = current_character->previous_character;
current_character->previous_character = element;
}
/*
*
* This function puts a style after current_character, and updates
* current_character to the gregorio_character it created. It updates the
* double chained list. It does not touche to the det_styles list.
*
*/
static void insert_style_after(unsigned char type, unsigned char style,
gregorio_character **current_character)
{
gregorio_character *element =
(gregorio_character *) gregorio_malloc(sizeof(gregorio_character));
element->is_character = 0;
element->cos.s.type = type;
element->cos.s.style = style;
element->next_character = (*current_character)->next_character;
if ((*current_character)->next_character) {
(*current_character)->next_character->previous_character = element;
}
element->previous_character = (*current_character);
(*current_character)->next_character = element;
(*current_character) = element;
}
#if 0
static void insert_char_after(grewchar c,
gregorio_character **current_character)
{
gregorio_character *element =
(gregorio_character *) gregorio_malloc(sizeof(gregorio_character));
element->is_character = 1;
element->cos.character = c;
element->next_character = (*current_character)->next_character;
if ((*current_character)->next_character) {
(*current_character)->next_character->previous_character = element;
}
element->previous_character = (*current_character);
(*current_character)->next_character = element;
(*current_character) = element;
}
#endif
/*
*
* This function suppresses the character, updates the double chained
* list, and returns the character after, if there is one.
*
*/
static __inline gregorio_character *suppress_character(
gregorio_character *current_character)
{
if (current_character) {
gregorio_character *thischaracter = current_character;
if (current_character->previous_character) {
current_character->previous_character->next_character =
current_character->next_character;
}
if (current_character->next_character) {
current_character->next_character->previous_character =
current_character->previous_character;
}
current_character = current_character->next_character;
free(thischaracter);
}
return current_character;
}
/*
*
* Then start the inline functions for the big function. the first one is the
* function we call when we close a style. The magic thing is that is will
* prevent things like a<i></i>{<i>b</b>: when the user types a<i>b</i>, if the
* middle is between a and b (...), it will interpret it as a{<i>b</i>.
*
*/
static __inline void close_style(gregorio_character *current_character,
det_style *current_style)
{
/* we suppose that there is a previous_character, because there is a
* current_style
*/
gregorio_assert(current_character && current_character->previous_character,
close_syllable, "have a style but no previous character", return);
if (!current_character->previous_character->is_character
&& current_character->previous_character->cos.s.style ==
current_style->style) {
/* we do it this way rather than calling suppress_character on the
* previous character because the intent is more obvious to both the
* human reading it and to the clang static analyzer */
gregorio_character *tofree = current_character->previous_character;
if (tofree->previous_character) {
tofree->previous_character->next_character = current_character;
}
current_character->previous_character = tofree->previous_character;
free(tofree);
} else {
insert_style_before(ST_T_END, current_style->style, current_character);
}
}
/*
*
* next the function called when we have determined that we must end the center
* here : it closes all styles, adds a } and then reopens all styles.
*
*/
/* type is ST_CENTER or ST_FORCED_CENTER */
static __inline void end_center(grestyle_style type,
gregorio_character *current_character, det_style **ptr_style)
{
det_style *current_style;
current_style = *ptr_style;
while (current_style) {
close_style(current_character, current_style);
if (current_style->next_style) {
current_style = current_style->next_style;
} else {
break;
}
}
insert_style_before(ST_T_END, type, current_character);
while (current_style) {
insert_style_before(ST_T_BEGIN, current_style->style,
current_character);
if (current_style->previous_style) {
current_style = current_style->previous_style;
} else {
break;
}
}
*ptr_style = current_style;
}
/*
* about the same, but adding a {
*/
static __inline void begin_center(grestyle_style type,
gregorio_character *current_character, det_style **ptr_style)
{
det_style *current_style;
current_style = *ptr_style;
while (current_style) {
close_style(current_character, current_style);
if (current_style->next_style) {
current_style = current_style->next_style;
} else {
break;
}
}
insert_style_before(ST_T_BEGIN, type, current_character);
while (current_style) {
insert_style_before(ST_T_BEGIN, current_style->style,
current_character);
if (current_style->previous_style) {
current_style = current_style->previous_style;
} else {
break;
}
}
*ptr_style = current_style;
}
/*
* THE big function. Very long, using a lot of long macros, etc. I hope you
* really want to understand it, 'cause it won't be easy.
*
* current character is a pointer to a gregorio_character. The
* gregorio_character double-chained list it is in will be totally reorganized
* so that it is xml compliant, and the function will update it to the first
* character of this brand new list.
*
* center_is_determined has the values present in characters.h.
*
* Another difficulty is the fact that we must consider characters in verbatim
* and special character styles like only one block, we can't say the center is
* in the middle of a verbatim block.
*/
void gregorio_rebuild_characters(gregorio_character **const param_character,
gregorio_center_determination center_is_determined, bool skip_initial)
{
/* the current_character */
gregorio_character *current_character = *param_character;
gregorio_character *sentinel;
det_style *first_style = NULL;
/* determining the type of centering (forced or not) */
grestyle_style center_type = ST_NO_STYLE;
int start = -1, end = -1, index = -1;
bool in_elision = false;
det_style *current_style;
/* so, here we start: we go to the first_character */
if (skip_initial && go_to_end_initial(¤t_character)) {
if (!current_character->next_character) {
/* nothing else to rebuild, but the initial needs to be ST_CENTER */
insert_style_after(ST_T_END, ST_CENTER, ¤t_character);
gregorio_go_to_first_character_c(¤t_character);
insert_style_before(ST_T_BEGIN, ST_CENTER, current_character);
gregorio_go_to_first_character_c(¤t_character);
(*param_character) = current_character;
return;
}
/* move to the character after the initial */
current_character = current_character->next_character;
} else {
if (current_character) {
gregorio_go_to_first_character_c(¤t_character);
}
}
/* first we see if there is already a center determined */
if (center_is_determined == 0) {
center_type = ST_CENTER;
determine_center(current_character, &start, &end);
} else {
center_type = ST_FORCED_CENTER;
}
if (!current_character) {
return;
}
for (sentinel = current_character; sentinel->next_character;
sentinel = sentinel->next_character) {
/* just loop to get the last character */
}
/* put a sentinel at the end to aid in looping */
insert_style_after(ST_T_NOTHING, ST_SENTINEL, &sentinel);
/* we loop until there isn't any character */
while (current_character && current_character != sentinel) {
/* IMPORTANT: A continue inside this loop MUST put current_character on
* the next character to process */
/* the first part of the function deals with real characters (not
* styles) */
if (current_character->is_character) {
if (!in_elision) {
++index;
if (!center_is_determined && index == start) {
/* the firstcase is if the user hasn't determined the
* middle, and we have only seen vowels so far (else
* center_is_determined would be DETERMINING_MIDDLE). The
* current_character is the first vowel, so we start the
* center here. */
begin_center(center_type, current_character, &first_style);
center_is_determined = CENTER_DETERMINING_MIDDLE;
} else if (center_is_determined == CENTER_DETERMINING_MIDDLE
&& index == end) {
/* the case where the user has not determined the middle
* and we are in the middle section of the syllable, but
* there we encounter something that is not a vowel, so the
* center ends there. */
end_center(center_type, current_character, &first_style);
center_is_determined = CENTER_FULLY_DETERMINED;
} /* else it is just a normal character... we simply pass. */
}
} else {
const grestyle_style style = current_character->cos.s.style;
/* there starts the second part of the function that deals with the
* styles characters */
switch (current_character->cos.s.type) {
case ST_T_BEGIN:
/* the beginning of a style */
switch (style) {
case ST_VERBATIM:
case ST_SPECIAL_CHAR:
/* if we are determining the end of the middle and we have
* a VERBATIM or SPECIAL_CHAR style, we end the center
* determination */
if (center_is_determined == CENTER_DETERMINING_MIDDLE) {
end_center(center_type, current_character, &first_style);
center_is_determined = CENTER_FULLY_DETERMINED;
}
/* Here we pass all the characters after a verbatim (or
* special char) beginning, until we find a style (begin or
* end) */
if (current_character->next_character) {
current_character = current_character->next_character;
}
while (current_character && current_character != sentinel
&& current_character->is_character) {
current_character = current_character->next_character;
}
assert(current_character);
if (current_character != sentinel) {
gregorio_assert2(!current_character->is_character
&& current_character->cos.s.type == ST_T_END
&& current_character->cos.s.style == style,
gregorio_rebuild_characters, "mismatched %s",
grestyle_style_to_string(style), break);
}
break;
case ST_CENTER:
/* not reachable unless there's a programming error */
/* LCOV_EXCL_START */
gregorio_fail(gregorio_rebuild_characters,
"encountered unexpected begin ST_CENTER");
break;
/* LCOV_EXCL_STOP */
case ST_FORCED_CENTER:
begin_center(center_type, current_character, &first_style);
current_character = suppress_character(current_character);
continue;
default:
handle_elision(current_character, &in_elision);
/* it the beginning of a style, which is not center. We
* check if the style is not already in the stack. If it is
* the case, we suppress the character and pass */
for (current_style = first_style; current_style
&& current_style->style != current_character->cos.s.style;
current_style = current_style->next_style) {
/* just loop */
}
if (current_style) {
current_character = suppress_character(current_character);
continue;
}
/* if it is something to add then we just push the style in the
* stack and continue. */
style_push(&first_style, current_character->cos.s.style);
break;
}
break;
case ST_T_END:
/* the beginning of a style */
switch(current_character->cos.s.style) {
case ST_VERBATIM:
case ST_SPECIAL_CHAR:
case ST_CENTER:
/* not reachable unless there's a programming error */
/* LCOV_EXCL_START */
gregorio_fail2(gregorio_rebuild_characters,
"encountered unexpected end %s",
grestyle_style_to_string(
current_character->cos.s.style));
break;
/* LCOV_EXCL_STOP */
case ST_FORCED_CENTER:
end_center(center_type, current_character, &first_style);
current_character = suppress_character(current_character);
continue;
default:
handle_elision(current_character, &in_elision);
/* the case of the end of a style (the most complex).
* First, we have to see if the style is in the stack. If
* there is no stack, we just suppress and continue. */
if (!first_style) {
current_character = suppress_character(current_character);
continue;
}
/* so, we look if it is in the stack. If it is we put
* current_style to the style just before the style
* corresponding to the character that we are treating
* (still there ?) */
for (current_style = first_style; current_style
&& current_style->style
!= current_character->cos.s.style;
current_style = current_style->next_style) {
/* just loop */
}
if (current_style) {
det_style *this_style;
/* if there are styles before in the stack, we close
* them */
for (this_style = first_style;
this_style != current_style;
this_style = this_style->next_style) {
insert_style_before(ST_T_END, this_style->style,
current_character);
}
/* and then we reopen them */
for (this_style = this_style->previous_style;
this_style;
this_style = this_style->previous_style) {
insert_style_after(ST_T_BEGIN, this_style->style,
¤t_character);
}
/* we delete the style in the stack */
style_pop(&first_style, current_style);
} else {
current_character = suppress_character(current_character);
continue;
}
}
break;
default:
/* not reachable unless there's a programming error */
/* LCOV_EXCL_START */
gregorio_fail(gregorio_rebuild_characters,
"unexpected style type");
}
/* LCOV_EXCL_STOP */
}
current_character = current_character->next_character;
}
/* destroy the sentinel */
current_character = sentinel->previous_character;
current_character->next_character = NULL;
free(sentinel);
/* we terminate all the styles that are still in the stack */
for (current_style = first_style; current_style;
current_style = current_style->next_style) {
insert_style_after(ST_T_END, current_style->style,
¤t_character);
}
/* current_character is at the end of the list now, so if we havn't closed
* the center, we do it at the end. */
if (center_is_determined != CENTER_FULLY_DETERMINED) {
insert_style_after(ST_T_END, center_type, ¤t_character);
}
/* these three lines are for the case where the user didn't tell anything
* about the middle and there aren't any vowel in the syllable, so we
* begin the center before the first character (you can notice that there
* is no problem of style). */
if (!center_is_determined) {
if (skip_initial && go_to_end_initial(¤t_character)) {
current_character = current_character->next_character;
} else {
gregorio_go_to_first_character_c(¤t_character);
}
insert_style_before(ST_T_BEGIN, ST_CENTER, current_character);
}
/* well.. you're quite brave if you reach this comment. */
gregorio_go_to_first_character_c(¤t_character);
(*param_character) = current_character;
free_styles(&first_style);
}
/**
* @brief This function will determine the behaviour of gregorio when it comes to the recognition of the initial.
*
* Basically it will take a gregorio_character list and return the same list, but with a style added : ST_INITIAL. This style will incidate the initial. The center will be placed at the second letter, unless there is a FORCED_CENTER somewhere.
* Finally all will be xml-compliant and tex-compliant when we call gregorio_rebuild_characters.
*
* If we note <> for the initial and {} for the center, here is what we want:
*
* @li \verbatim Po -> <P>{o} \endverbatim
* @li \verbatim {A}b -> <>{A}b \endverbatim
* @li \verbatim {}a -> <>{}a \endverbatim
* @li \verbatim Glo -> <G>{l}o \endverbatim
* @li \verbatim Gl{o} -> <G>l{o} \endverbatim
*
* @param param_character is a pointer to the (pointer to the) first character, it will be modified so that it points to the new first character.
*/
void gregorio_rebuild_first_syllable(gregorio_character **param_character,
bool separate_initial)
{
/* the current_character */
gregorio_character *current_character = *param_character;
gregorio_character *first_character;
gregorio_character *start_of_special;
/* so, here we start: we go to the first_character */
gregorio_go_to_first_character_c(¤t_character);
/* first we look at the styles to see if there is a FORCED_CENTER
* somewhere */
/* Note: we don't have to deal with ST_CENTER here because
* gregorio_rebuild_first_syllable is meant to be run **before**
* gregorio_rebuild_characters, which is what adds ST_CENTER */
gregorio_assert(param_character, gregorio_rebuild_first_syllable,
"param_character may not be NULL", return);
while (current_character) {
if (!current_character->is_character) {
if (current_character->cos.s.style == ST_FORCED_CENTER) {
/* we can break here, as there won't be forced center plus
* center */
break;
}
}
current_character = current_character->next_character;
}
current_character = *param_character;
gregorio_go_to_first_character_c(¤t_character);
first_character = current_character;
/* now we are going to place the two INITIAL styles (begin and end) */
while (current_character) {
if (!current_character->is_character
&& current_character->cos.s.style == ST_FORCED_CENTER) {
/* we don't touch anything after a FORCED_CENTER, so we put an
* empty INITIAL style just before */
current_character = first_character;
insert_style_before(ST_T_BEGIN, ST_INITIAL, current_character);
current_character = current_character->previous_character;
insert_style_after(ST_T_END, ST_INITIAL, ¤t_character);
break;
}
/* this if is a hack to make gregorio consider verbatim blocks and
* special chars like one block, not a sequence of letters */
if (!current_character->is_character
&& current_character->cos.s.type == ST_T_BEGIN
&& (current_character->cos.s.style == ST_VERBATIM
|| current_character->cos.s.style == ST_SPECIAL_CHAR)) {
insert_style_before(ST_T_BEGIN, ST_INITIAL, current_character);
start_of_special = current_character->previous_character;
/* ... which is now the begin-initial style */
if (current_character->next_character) {
current_character = current_character->next_character;
}
while (current_character->next_character
&& current_character->is_character) {
current_character = current_character->next_character;
}
insert_style_after(ST_T_END, ST_INITIAL, ¤t_character);
if (separate_initial && start_of_special->previous_character) {
/* we need to move the initial to the front */
start_of_special->previous_character->next_character =
current_character->next_character;
current_character->next_character->previous_character =
start_of_special->previous_character;
start_of_special->previous_character = NULL;
current_character->next_character = first_character;
first_character->previous_character = current_character;
}
break;
}
if (current_character->is_character) {
if (separate_initial && current_character->previous_character) {
/* we need to move the initial to the front */
current_character->previous_character->next_character =
current_character->next_character;
current_character->next_character->previous_character =
current_character->previous_character;
current_character->previous_character = NULL;
current_character->next_character = first_character;
first_character->previous_character = current_character;
}
insert_style_before(ST_T_BEGIN, ST_INITIAL, current_character);
insert_style_after(ST_T_END, ST_INITIAL, ¤t_character);
break;
}
current_character = current_character->next_character;
}
/* now apply the first syllable style */
current_character = *param_character;
if (separate_initial) {
if (go_to_end_initial(¤t_character)) {
current_character = current_character->next_character;
}
} else {
gregorio_go_to_first_character_c(¤t_character);
}
if (current_character) {
bool marked_syllable_initial = false;
insert_style_before(ST_T_BEGIN, ST_FIRST_SYLLABLE, current_character);
do {
if (!marked_syllable_initial && (current_character->is_character
|| (current_character->cos.s.type == ST_T_BEGIN
&& (current_character->cos.s.style == ST_VERBATIM
|| current_character->cos.s.style
== ST_SPECIAL_CHAR
)
)
)) {
marked_syllable_initial = true;
insert_style_before(ST_T_BEGIN, ST_FIRST_SYLLABLE_INITIAL,
current_character);
if (!current_character->is_character) {
/* skip past the verbatim or special character */
if (current_character->next_character) {
current_character = current_character->next_character;
}
while (current_character->next_character
&& current_character->is_character) {
current_character = current_character->next_character;
}
}
insert_style_after(ST_T_END, ST_FIRST_SYLLABLE_INITIAL,
¤t_character);
}
if (!current_character->is_character
&& (current_character->cos.s.style == ST_CENTER
|| current_character->cos.s.style == ST_FORCED_CENTER)) {
insert_style_before(ST_T_END, ST_FIRST_SYLLABLE,
current_character);
insert_style_after(ST_T_BEGIN, ST_FIRST_SYLLABLE,
¤t_character);
}
if (!current_character->next_character) {
insert_style_after(ST_T_END, ST_FIRST_SYLLABLE,
¤t_character);
}
current_character = current_character->next_character;
} while (current_character);
}
current_character = *param_character;
gregorio_go_to_first_character_c(¤t_character);
(*param_character) = current_character;
}
void gregorio_set_first_word(gregorio_character **const character)
{
gregorio_character *ch = *character;
if (go_to_end_initial(&ch)) {
ch = ch->next_character;
}
if (ch) {
bool started_style = false;
while (ch) {
if (!ch->is_character
&& (ch->cos.s.style == ST_CENTER
|| ch->cos.s.style == ST_FORCED_CENTER)) {
if (started_style) {
started_style = false;
insert_style_before(ST_T_END, ST_FIRST_WORD, ch);
}
} else if (!started_style) {
started_style = true;
insert_style_before(ST_T_BEGIN, ST_FIRST_WORD, ch);
}
if (!ch->next_character && started_style) {
insert_style_after(ST_T_END, ST_FIRST_WORD, &ch);
}
ch = ch->next_character;
}
}
/* else there are no more characters here */
if (*character) {
gregorio_go_to_first_character_c(character);
}
}
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