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/*
* contents.c: build a table of contents
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include "halibut.h"
struct numberstate_Tag {
int chapternum;
int appendixnum;
int ischapter;
int *sectionlevels;
paragraph **currentsects;
paragraph *lastsect;
int oklevel;
int maxsectlevel;
int listitem;
wchar_t *chaptertext; /* the word for a chapter */
wchar_t *sectiontext; /* the word for a section */
wchar_t *apptext; /* the word for an appendix */
};
numberstate *number_init(void) {
numberstate *ret = mknew(numberstate);
ret->chapternum = 0;
ret->appendixnum = -1;
ret->ischapter = 1;
ret->oklevel = -1; /* not even in a chapter yet */
ret->maxsectlevel = 32;
ret->sectionlevels = mknewa(int, ret->maxsectlevel);
ret->currentsects = mknewa(paragraph *, ret->maxsectlevel+1);
memset(ret->currentsects, 0, (ret->maxsectlevel+1)*sizeof(paragraph *));
ret->lastsect = NULL;
ret->listitem = -1;
return ret;
}
void number_free(numberstate *state) {
sfree(state->sectionlevels);
sfree(state->currentsects);
sfree(state);
}
static void dotext(word ***wret, wchar_t *text) {
word *mnewword = mknew(word);
mnewword->text = ustrdup(text);
mnewword->type = word_Normal;
mnewword->alt = NULL;
mnewword->next = NULL;
**wret = mnewword;
*wret = &mnewword->next;
}
static void dospace(word ***wret) {
word *mnewword = mknew(word);
mnewword->text = NULL;
mnewword->type = word_WhiteSpace;
mnewword->alt = NULL;
mnewword->next = NULL;
**wret = mnewword;
*wret = &mnewword->next;
}
static void donumber(word ***wret, int num) {
wchar_t text[20];
wchar_t *p = text + sizeof(text);
*--p = L'\0';
while (num != 0) {
assert(p > text);
*--p = L"0123456789"[num % 10];
num /= 10;
}
dotext(wret, p);
}
static void doanumber(word ***wret, int num) {
wchar_t text[20];
wchar_t *p;
int nletters, aton;
nletters = 1;
aton = 25;
while (num > aton) {
nletters++;
num -= aton+1;
if (aton < INT_MAX/26)
aton = (aton+1) * 26 - 1;
else
aton = INT_MAX;
}
p = text + sizeof(text);
*--p = L'\0';
while (nletters--) {
assert(p > text);
*--p = L"ABCDEFGHIJKLMNOPQRSTUVWXYZ"[num % 26];
num /= 26;
}
dotext(wret, p);
}
void number_cfg(numberstate *state, paragraph *source) {
/*
* Defaults
*/
state->chaptertext = L"Chapter";
state->sectiontext = L"Section";
state->apptext = L"Appendix";
for (; source; source = source->next) {
if (source->type == para_Config) {
if (!ustricmp(source->keyword, L"chapter")) {
state->chaptertext = uadv(source->keyword);
} else if (!ustricmp(source->keyword, L"section")) {
state->sectiontext = uadv(source->keyword);
} else if (!ustricmp(source->keyword, L"appendix")) {
state->apptext = uadv(source->keyword);
}
}
}
}
word *number_mktext(numberstate *state, paragraph *p, wchar_t *category,
int prev, int *errflag) {
word *ret = NULL;
word **ret2 = &ret;
word **pret = &ret;
int i, level;
level = -2; /* default for non-section-heading */
switch (p->type) {
case para_Chapter:
state->chapternum++;
for (i = 0; i < state->maxsectlevel; i++)
state->sectionlevels[i] = 0;
dotext(&pret, category ? category : state->chaptertext);
dospace(&pret);
ret2 = pret;
donumber(&pret, state->chapternum);
state->ischapter = 1;
state->oklevel = 0;
level = -1;
break;
case para_Heading:
case para_Subsect:
level = (p->type == para_Heading ? 0 : p->aux);
if (level > state->oklevel) {
error(err_sectjump, &p->fpos);
*errflag = TRUE;
ret = NULL;
break;
}
state->oklevel = level+1;
if (state->maxsectlevel <= level) {
state->maxsectlevel = level + 32;
state->sectionlevels = resize(state->sectionlevels,
state->maxsectlevel);
}
state->sectionlevels[level]++;
for (i = level+1; i < state->maxsectlevel; i++)
state->sectionlevels[i] = 0;
dotext(&pret, category ? category : state->sectiontext);
dospace(&pret);
ret2 = pret;
if (state->ischapter)
donumber(&pret, state->chapternum);
else
doanumber(&pret, state->appendixnum);
for (i = 0; i <= level; i++) {
dotext(&pret, L".");
if (state->sectionlevels[i] == 0)
state->sectionlevels[i] = 1;
donumber(&pret, state->sectionlevels[i]);
}
break;
case para_Appendix:
state->appendixnum++;
for (i = 0; i < state->maxsectlevel; i++)
state->sectionlevels[i] = 0;
dotext(&pret, category ? category : state->apptext);
dospace(&pret);
ret2 = pret;
doanumber(&pret, state->appendixnum);
state->ischapter = 0;
state->oklevel = 0;
level = -1;
break;
case para_UnnumberedChapter:
level = -1;
break;
case para_NumberedList:
ret2 = pret;
if (prev != para_NumberedList)
state->listitem = 0;
state->listitem++;
donumber(&pret, state->listitem);
break;
}
/*
* Now set up parent, child and sibling links.
*/
p->parent = p->child = p->sibling = NULL;
if (level != -2) {
if (state->currentsects[level+1])
state->currentsects[level+1]->sibling = p;
if (level >= 0 && state->currentsects[level]) {
p->parent = state->currentsects[level];
if (!state->currentsects[level]->child)
state->currentsects[level]->child = p;
}
state->currentsects[level+1] = state->lastsect = p;
for (i = level+2; i < state->maxsectlevel+1; i++)
state->currentsects[i] = NULL;
} else {
p->parent = state->lastsect;
}
p->kwtext2 = *ret2;
return ret;
}
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