libc: сплит «1 функция = 1 модуль» — вся библиотека, wildcard-сборка
- bios/conio/env/errno/gfx/io/mem/mouse/stdio/stdlib/string/sys/time/ video разложены по модулям: общие статики и helpers — в internal _-модулях (_conio.h/_mouse.h/_gfx.h/_palette.h/_atexit.h/_time.h) - lib/Makefile: LIBC_C = wildcard libc/*/*.c — гранулярность файлов = гранулярность DCE линкера - эффект _CODE: gfx_text 6986→2568 Б, gfx_mous −1745, gfx_demo/d16 −542; ранее timedir −3270, ls −3098, stattest −2995 - комментарии оставшихся модулей переведены на русский; puts: убран мёртвый pchars; videomode_raw разложен на get/set - docs/libc-split-asm-cases.md — правила asm-связок между модулями; docs/libc-roadmap.md — план этапа - восстановлен examples/mdview/SAMPLE.MD (нужен make floppy) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
@@ -0,0 +1,23 @@
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/*
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* _time.h — внутренние календарные хелперы для time()/gmtime()/mktime().
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*
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* НЕ публичный заголовок: живёт рядом с исходниками. Каждый хелпер —
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* свой модуль (_tm_mdays.c/_tm_is_leap.c/_tm_year_days.c/_tm_month_days.c),
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* чтобы приложение тянуло только те, которые реально вызывает.
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*/
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#ifndef _TIME_INTERNAL_H
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#define _TIME_INTERNAL_H
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/* Дней в месяце невисокосного года (Jan..Dec). */
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extern const unsigned char _tm_mdays[12];
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/* 1, если год високосный (по григорианскому календарю). */
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int _tm_is_leap(unsigned int y);
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/* Дней от 1970-01-01 до (y, 1, 1). */
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unsigned long _tm_year_days(unsigned int y);
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/* Дней от 1 января до начала месяца (месяц 1-based). */
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unsigned int _tm_month_days(unsigned int y, unsigned int m);
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#endif
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@@ -0,0 +1,8 @@
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/* _tm_is_leap — проверка високосности года (григорианский календарь). */
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#include "_time.h"
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int _tm_is_leap(unsigned int y)
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{
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return (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0);
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}
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@@ -0,0 +1,8 @@
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/* _tm_mdays — дней в месяце невисокосного года (Jan..Dec). Общая
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* таблица для gmtime и _tm_month_days; модуль только с данными. */
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#include "_time.h"
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const unsigned char _tm_mdays[12] = {
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31,28,31,30,31,30,31,31,30,31,30,31
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};
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@@ -0,0 +1,12 @@
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/* _tm_month_days — дней от 1 января до начала месяца (месяц 1-based),
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* с учётом високосности. */
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#include "_time.h"
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unsigned int _tm_month_days(unsigned int y, unsigned int m)
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{
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unsigned int d = 0;
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for (unsigned int i = 0; i < m - 1; i++) d += _tm_mdays[i];
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if (m > 2 && _tm_is_leap(y)) d++;
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return d;
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}
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@@ -0,0 +1,11 @@
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/* _tm_year_days — дней от 1970-01-01 до 1 января года y. */
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#include "_time.h"
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unsigned long _tm_year_days(unsigned int y)
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{
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unsigned long d = 0;
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for (unsigned int i = 1970; i < y; i++)
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d += _tm_is_leap(i) ? 366 : 365;
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return d;
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}
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@@ -0,0 +1,27 @@
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/* asctime — форматирует struct tm как "Day Mon DD HH:MM:SS YYYY\n"
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* в статический буфер (перезаписывается следующим вызовом). */
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#include <stdio.h>
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#include <time.h>
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static const char *const dnames[7] = {
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"Sun","Mon","Tue","Wed","Thu","Fri","Sat"
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};
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static const char *const mnames[12] = {
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"Jan","Feb","Mar","Apr","May","Jun",
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"Jul","Aug","Sep","Oct","Nov","Dec"
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};
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/* "Day Mon DD HH:MM:SS YYYY\n" — 25 символов + NUL. */
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static char asctime_buf[26];
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char *asctime(struct tm *tm)
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{
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sprintf(asctime_buf, "%s %s %2d %02d:%02d:%02d %d\n",
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dnames[tm->tm_wday % 7],
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mnames[tm->tm_mon % 12],
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tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec,
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tm->tm_year + 1900);
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return asctime_buf;
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}
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@@ -0,0 +1,8 @@
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/* ctime — время эпохи одной строкой: asctime(localtime(timep)). */
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#include <time.h>
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char *ctime(time_t *timep)
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{
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return asctime(localtime(timep));
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}
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@@ -0,0 +1,49 @@
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/*
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* getdatetime — чтение RTC через ESTEX SYSTIME ($21).
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*
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* $21 SYSTIME → D=day E=month IX=year H=hour L=min B=sec C=dow
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*
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* Раскладка структуры (datetime_t, 8 байт):
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* +0 day, +1 month, +2..3 year, +4 hour, +5 min, +6 sec, +7 dow
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*
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* Пишет прямо в *dt — без статического скретча. Ключевой трюк —
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* `ex (sp), hl` после RST: в HL час:мин, на вершине стека dt —
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* один байт меняет их местами, дальше идём по структуре через HL.
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*/
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#include <time.h>
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void getdatetime(datetime_t *dt) __naked
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{
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(void)dt;
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__asm
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push ix ; save caller IX (BIOS clobbers it)
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push hl ; stash dt across RST (clobbers HL)
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ld c, #0x21 ; ESTEX SYSTIME
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rst #0x10
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;; Returns: D=day E=month IX=year H=hour L=min B=sec C=dow
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;; ex (sp), hl: TOS<->HL. Now HL = dt, TOS = hour:min stash.
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ex (sp), hl
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ld (hl), d ; +0 day
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inc hl
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ld (hl), e ; +1 month
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inc hl
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push ix ; year → stack
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pop de ; DE = year
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ld (hl), e ; +2 year low
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inc hl
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ld (hl), d ; +3 year high
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inc hl
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pop de ; D = hour, E = min (from earlier ex(sp))
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ld (hl), d ; +4 hour
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inc hl
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ld (hl), e ; +5 min
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inc hl
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ld (hl), b ; +6 sec
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inc hl
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ld (hl), c ; +7 dow
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pop ix ; restore caller IX
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ret
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__endasm;
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}
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@@ -0,0 +1,44 @@
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/*
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* gmtime — разложить секунды эпохи в struct tm.
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*
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* localtime и gmtime делят один статический буфер — при необходимости
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* пережить следующий вызов клиент копирует результат (поведение POSIX).
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* Таймзон нет: localtime() просто вызывает gmtime().
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*/
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#include <time.h>
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#include "_time.h"
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static struct tm tm_buf;
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struct tm *gmtime(time_t *timep)
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{
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unsigned long sec = *timep;
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tm_buf.tm_sec = (unsigned char)(sec % 60); sec /= 60;
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tm_buf.tm_min = (unsigned char)(sec % 60); sec /= 60;
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tm_buf.tm_hour = (unsigned char)(sec % 24); sec /= 24;
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/* sec теперь — дни с 1970-01-01 (четверг). */
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tm_buf.tm_wday = (unsigned char)((4 + sec) % 7);
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/* подобрать год */
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unsigned int y = 1970;
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unsigned long days = sec;
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while (days >= (unsigned long)(_tm_is_leap(y) ? 366 : 365)) {
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days -= _tm_is_leap(y) ? 366 : 365;
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y++;
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}
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tm_buf.tm_year = (int)y - 1900;
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tm_buf.tm_yday = (int)days;
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/* подобрать месяц/день */
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unsigned int m = 0;
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while (m < 12) {
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unsigned int dim = _tm_mdays[m] + ((m == 1) && _tm_is_leap(y) ? 1u : 0u);
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if (days < dim) break;
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days -= dim;
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m++;
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}
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tm_buf.tm_mon = (unsigned char)m;
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tm_buf.tm_mday = (unsigned char)(days + 1);
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tm_buf.tm_isdst = 0;
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tm_buf.tm_hundredth = 0;
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return &tm_buf;
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}
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@@ -0,0 +1,8 @@
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/* localtime — идентичен gmtime: таймзоны на Sprinter не поддержаны. */
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#include <time.h>
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struct tm *localtime(time_t *timep)
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{
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return gmtime(timep);
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}
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@@ -0,0 +1,22 @@
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/* mktime — struct tm → секунды Unix-эпохи (без таймзон/DST).
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* Попутно заполняет tm_wday/tm_yday, чтобы клиент мог их читать. */
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#include <time.h>
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#include "_time.h"
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time_t mktime(struct tm *tm)
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{
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unsigned int y = (unsigned int)(tm->tm_year + 1900);
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unsigned long days = _tm_year_days(y)
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+ _tm_month_days(y, (unsigned int)tm->tm_mon + 1)
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+ (unsigned int)(tm->tm_mday - 1);
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time_t epoch = days * 86400UL
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+ (unsigned long)tm->tm_hour * 3600UL
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+ (unsigned long)tm->tm_min * 60UL
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+ tm->tm_sec;
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/* Дозаполнить wday/yday для клиента. */
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tm->tm_wday = (unsigned char)((4 + days) % 7);
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tm->tm_yday = (int)_tm_month_days(y, (unsigned int)tm->tm_mon + 1)
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+ (tm->tm_mday - 1);
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return epoch;
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}
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@@ -1,143 +0,0 @@
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/*
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* posix_time.c — minimal POSIX <time.h> implementation on top of
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* getdatetime() (ESTEX SYSTIME $21).
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*
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* SDCC's z80.lib bundles time/localtime/mktime AND _RtcRead in a
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* single time.rel module, so the user can't override _RtcRead from a
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* separate object — overriding triggers a "multiple definition"
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* linker error. We sidestep that by implementing the whole POSIX time
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* API ourselves; the linker then never pulls SDCC's time.rel.
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*
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* The epoch is Unix (1970-01-01 00:00:00). No timezone support —
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* gmtime and localtime are identical. No DST.
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*/
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#include <stdio.h>
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#include <time.h>
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static const unsigned char mdays[12] = {
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31,28,31,30,31,30,31,31,30,31,30,31
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};
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static const char *const dnames[7] = {
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"Sun","Mon","Tue","Wed","Thu","Fri","Sat"
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};
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static const char *const mnames[12] = {
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"Jan","Feb","Mar","Apr","May","Jun",
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"Jul","Aug","Sep","Oct","Nov","Dec"
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};
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static int is_leap(unsigned int y)
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{
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return (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0);
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}
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/* Days elapsed from 1970-01-01 to (y, 1, 1). */
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static unsigned long year_days(unsigned int y)
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{
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unsigned long d = 0;
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for (unsigned int i = 1970; i < y; i++)
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d += is_leap(i) ? 366 : 365;
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return d;
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}
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/* Days from Jan 1 to month start (1-based month input). */
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static unsigned int month_days(unsigned int y, unsigned int m)
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{
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unsigned int d = 0;
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for (unsigned int i = 0; i < m - 1; i++) d += mdays[i];
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if (m > 2 && is_leap(y)) d++;
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return d;
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}
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time_t time(time_t *t)
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{
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datetime_t dt;
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getdatetime(&dt);
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unsigned long days = year_days(dt.year)
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+ month_days(dt.year, dt.month)
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+ (dt.day - 1);
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time_t epoch = days * 86400UL
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+ (unsigned long)dt.hour * 3600UL
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+ (unsigned long)dt.minute * 60UL
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+ dt.second;
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if (t) *t = epoch;
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return epoch;
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}
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/* localtime and gmtime share one static buffer — caller copies if
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* needed across further calls (matches POSIX behaviour). */
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static struct tm tm_buf;
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struct tm *gmtime(time_t *timep)
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{
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unsigned long sec = *timep;
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tm_buf.tm_sec = (unsigned char)(sec % 60); sec /= 60;
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tm_buf.tm_min = (unsigned char)(sec % 60); sec /= 60;
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tm_buf.tm_hour = (unsigned char)(sec % 24); sec /= 24;
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/* sec is now days since 1970-01-01 (Thursday). */
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tm_buf.tm_wday = (unsigned char)((4 + sec) % 7);
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/* find year */
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unsigned int y = 1970;
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unsigned long days = sec;
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while (days >= (unsigned long)(is_leap(y) ? 366 : 365)) {
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days -= is_leap(y) ? 366 : 365;
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y++;
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}
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tm_buf.tm_year = (int)y - 1900;
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tm_buf.tm_yday = (int)days;
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/* find month/day */
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unsigned int m = 0;
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while (m < 12) {
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unsigned int dim = mdays[m] + ((m == 1) && is_leap(y) ? 1u : 0u);
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if (days < dim) break;
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days -= dim;
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m++;
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}
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tm_buf.tm_mon = (unsigned char)m;
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tm_buf.tm_mday = (unsigned char)(days + 1);
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tm_buf.tm_isdst = 0;
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tm_buf.tm_hundredth = 0;
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return &tm_buf;
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}
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struct tm *localtime(time_t *timep)
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{
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return gmtime(timep); /* no timezone */
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}
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time_t mktime(struct tm *tm)
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{
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unsigned int y = (unsigned int)(tm->tm_year + 1900);
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unsigned long days = year_days(y)
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+ month_days(y, (unsigned int)tm->tm_mon + 1)
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+ (unsigned int)(tm->tm_mday - 1);
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time_t epoch = days * 86400UL
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+ (unsigned long)tm->tm_hour * 3600UL
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+ (unsigned long)tm->tm_min * 60UL
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+ tm->tm_sec;
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/* Backfill wday/yday so callers can inspect them. */
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tm->tm_wday = (unsigned char)((4 + days) % 7);
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tm->tm_yday = (int)month_days(y, (unsigned int)tm->tm_mon + 1)
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+ (tm->tm_mday - 1);
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return epoch;
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}
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/* "Day Mon DD HH:MM:SS YYYY\n" — 25 chars + NUL. */
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static char asctime_buf[26];
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char *asctime(struct tm *tm)
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{
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sprintf(asctime_buf, "%s %s %2d %02d:%02d:%02d %d\n",
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dnames[tm->tm_wday % 7],
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mnames[tm->tm_mon % 12],
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tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec,
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tm->tm_year + 1900);
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return asctime_buf;
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}
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char *ctime(time_t *timep)
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{
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return asctime(localtime(timep));
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}
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@@ -0,0 +1,50 @@
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/*
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* setdatetime — запись RTC через ESTEX SETTIME ($22).
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*
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* $22 SETTIME D=day E=month IX=year H=hour L=min B=sec → CF=err / A=errcode
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*
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* Читает прямо из *dt — без статического скретча. IX используется как
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* указатель на структуру (перед RST перезагружается годом — так ждёт
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* SETTIME). Возврат: 0 или -1 + errno.
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*/
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#include <time.h>
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#include <errno.h>
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int setdatetime(const datetime_t *dt) __naked
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||||
{
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||||
(void)dt;
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__asm
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||||
push ix ; save caller IX
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||||
push hl
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||||
pop ix ; IX = dt
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ld d, (hl) ; +0 D = day
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inc hl
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ld e, (hl) ; +1 E = month
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inc hl
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ld c, (hl) ; +2 year low
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inc hl
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ld b, (hl) ; +3 year high (BC->IX)
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inc hl
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push bc
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ld b, (hl) ; +4 H = hour
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inc hl
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ld c, (hl) ; +5 L = min (BC->HL)
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inc hl
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push bc
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ld b, (hl) ; +6 B = sec
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pop hl
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pop ix
|
||||
ld c, #0x22 ; ESTEX SETTIME
|
||||
rst #0x10
|
||||
pop ix ; restore caller IX
|
||||
jr c, _st_err2
|
||||
ld de, #0
|
||||
ret
|
||||
_st_err2:
|
||||
call __errno_set
|
||||
ld de, #-1
|
||||
ret
|
||||
__endasm;
|
||||
}
|
||||
+9
-9
@@ -1,12 +1,12 @@
|
||||
/*
|
||||
* sleep — block for N seconds using the 50 Hz frame interrupt.
|
||||
* sleep — заблокироваться на N секунд по кадровому прерыванию 50 Гц.
|
||||
*
|
||||
* Sprinter ISR fires 50 times per second. `halt` parks the CPU until
|
||||
* the next IRQ, so 50 halts = ~1 second of wall clock. This is the
|
||||
* same trick solid-c uses in IO.ASM:285.
|
||||
* ISR Sprinter срабатывает 50 раз в секунду. `halt` паркует CPU до
|
||||
* следующего IRQ, так что 50 halt'ов = ~1 секунда стенного времени.
|
||||
* Тот же трюк, что у solid-c в IO.ASM:285.
|
||||
*
|
||||
* Note: requires interrupts to be enabled (they are by default — ESTEX
|
||||
* sets up IM 1 with the frame ISR before our program runs).
|
||||
* Замечание: требует включённых прерываний (по умолчанию включены —
|
||||
* ESTEX настраивает IM 1 с кадровым ISR до запуска нашей программы).
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
@@ -16,11 +16,11 @@ void sleep(unsigned int seconds) __naked
|
||||
(void)seconds;
|
||||
__asm
|
||||
inter:
|
||||
;; HL = seconds on entry (SDCC single int arg).
|
||||
;; HL = seconds на входе (единственный int-аргумент SDCC).
|
||||
ld a, h
|
||||
or a, l
|
||||
ret Z ; sleep(0) — return immediately
|
||||
ld b, #50 ; 50 halts per second (50 Hz interrupt)
|
||||
ret Z ; sleep(0) — вернуться сразу
|
||||
ld b, #50 ; 50 halt-ов на секунду (50 Гц)
|
||||
inner:
|
||||
halt
|
||||
djnz inner
|
||||
|
||||
+21
-84
@@ -1,93 +1,30 @@
|
||||
/*
|
||||
* time.c — getdatetime / setdatetime via ESTEX SYSTIME ($21) / SETTIME ($22).
|
||||
* time — текущие секунды Unix-эпохи из RTC (getdatetime / ESTEX
|
||||
* SYSTIME $21).
|
||||
*
|
||||
* $21 SYSTIME → D=day E=month IX=year H=hour L=min B=sec C=dow
|
||||
* $22 SETTIME D=day E=month IX=year H=hour L=min B=sec → CF=err / A=errcode
|
||||
* SDCC-шная z80.lib кладёт time/localtime/mktime И _RtcRead в один
|
||||
* модуль time.rel, так что _RtcRead нельзя переопределить из
|
||||
* отдельного объектника — будет "multiple definition". Обходим это,
|
||||
* реализуя весь POSIX time API сами; тогда линкер никогда не тянет
|
||||
* SDCC-шный time.rel.
|
||||
*
|
||||
* Struct layout (datetime_t, 8 bytes):
|
||||
* +0 day, +1 month, +2..3 year, +4 hour, +5 min, +6 sec, +7 dow
|
||||
*
|
||||
* Both routines write/read *dt directly — no static scratch. The key
|
||||
* trick in getdatetime is `ex (sp), hl` after RST: HL holds hour:min,
|
||||
* stack TOS holds dt — one byte swaps them, then we walk the struct
|
||||
* via HL. setdatetime uses IX as the struct pointer (re-loaded with
|
||||
* year just before RST since that's what SETTIME expects).
|
||||
* Эпоха — Unix (1970-01-01 00:00:00). Без таймзон и DST.
|
||||
*/
|
||||
|
||||
#include <time.h>
|
||||
#include <errno.h>
|
||||
#include "_time.h"
|
||||
|
||||
void getdatetime(datetime_t *dt) __naked
|
||||
time_t time(time_t *t)
|
||||
{
|
||||
(void)dt;
|
||||
__asm
|
||||
push ix ; save caller IX (BIOS clobbers it)
|
||||
push hl ; stash dt across RST (clobbers HL)
|
||||
ld c, #0x21 ; ESTEX SYSTIME
|
||||
rst #0x10
|
||||
;; Returns: D=day E=month IX=year H=hour L=min B=sec C=dow
|
||||
|
||||
;; ex (sp), hl: TOS<->HL. Now HL = dt, TOS = hour:min stash.
|
||||
ex (sp), hl
|
||||
ld (hl), d ; +0 day
|
||||
inc hl
|
||||
ld (hl), e ; +1 month
|
||||
inc hl
|
||||
push ix ; year → stack
|
||||
pop de ; DE = year
|
||||
ld (hl), e ; +2 year low
|
||||
inc hl
|
||||
ld (hl), d ; +3 year high
|
||||
inc hl
|
||||
pop de ; D = hour, E = min (from earlier ex(sp))
|
||||
ld (hl), d ; +4 hour
|
||||
inc hl
|
||||
ld (hl), e ; +5 min
|
||||
inc hl
|
||||
ld (hl), b ; +6 sec
|
||||
inc hl
|
||||
ld (hl), c ; +7 dow
|
||||
pop ix ; restore caller IX
|
||||
ret
|
||||
__endasm;
|
||||
}
|
||||
|
||||
|
||||
|
||||
int setdatetime(const datetime_t *dt) __naked
|
||||
{
|
||||
(void)dt;
|
||||
__asm
|
||||
push ix ; save caller IX
|
||||
push hl
|
||||
pop ix ; IX = dt
|
||||
|
||||
ld d, (hl) ; +0 D = day
|
||||
inc hl
|
||||
ld e, (hl) ; +1 E = month
|
||||
inc hl
|
||||
ld c, (hl) ; +2 year low
|
||||
inc hl
|
||||
ld b, (hl) ; +3 year high (BC->IX)
|
||||
inc hl
|
||||
push bc
|
||||
ld b, (hl) ; +4 H = hour
|
||||
inc hl
|
||||
ld c, (hl) ; +5 L = min (BC->HL)
|
||||
inc hl
|
||||
push bc
|
||||
ld b, (hl) ; +6 B = sec
|
||||
pop hl
|
||||
pop ix
|
||||
ld c, #0x22 ; ESTEX SETTIME
|
||||
rst #0x10
|
||||
pop ix ; restore caller IX
|
||||
jr c, _st_err2
|
||||
ld de, #0
|
||||
ret
|
||||
_st_err2:
|
||||
call __errno_set
|
||||
ld de, #-1
|
||||
ret
|
||||
__endasm;
|
||||
datetime_t dt;
|
||||
getdatetime(&dt);
|
||||
unsigned long days = _tm_year_days(dt.year)
|
||||
+ _tm_month_days(dt.year, dt.month)
|
||||
+ (dt.day - 1);
|
||||
time_t epoch = days * 86400UL
|
||||
+ (unsigned long)dt.hour * 3600UL
|
||||
+ (unsigned long)dt.minute * 60UL
|
||||
+ dt.second;
|
||||
if (t) *t = epoch;
|
||||
return epoch;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user