关于在《30天自制操作系统》修改命令行窗口大小时遇到的问题

Question

如下所示，为《30天自制操作系统》内harib26e的bootpack的代码，因作者所提供的命令行窗口太小，后续开发不便，所以想要更改窗口大小，我最开始修改的是以下段：
注：原版的是256 * 165，我改成了620*330

struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    struct SHEET *sht = sheet_alloc(shtctl);
    unsigned char *buf = (unsigned char *) memman_alloc_4k(memman, 620 * 330);
    sheet_setbuf(sht, buf, 620, 330, -1); 
    make_window8(buf, 620, 330, "My-OS", 0);
    make_textbox8(sht, 8, 28, 240, 128, COL8_000000);
    sht->task = open_constask(sht, memtotal);
    sht->flags |= 0x20;    
    return sht;

但是在最后测试测试后发现，修改以上段仅更改了整体的窗口，而没有使内嵌的命令行窗口大小改变，想问一下各位大神怎么修改。
以下是源代码（代码是原书光盘内的，也许是因为原文件是作者在日本写的，所以注释部分产生了乱码，希望各位不要介意）

/* bootpack偺儊僀儞 */

#include "bootpack.h"
#include <stdio.h>

#define KEYCMD_LED        0xed

void keywin_off(struct SHEET *key_win);
void keywin_on(struct SHEET *key_win);
void close_console(struct SHEET *sht);
void close_constask(struct TASK *task);

void HariMain(void)
{
    struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
    struct SHTCTL *shtctl;
    char s[40];
    struct FIFO32 fifo, keycmd;
    int fifobuf[128], keycmd_buf[32];
    int mx, my, i, new_mx = -1, new_my = 0, new_wx = 0x7fffffff, new_wy = 0;
    unsigned int memtotal;
    struct MOUSE_DEC mdec;
    struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    unsigned char *buf_back, buf_mouse[256];
    struct SHEET *sht_back, *sht_mouse;
    struct TASK *task_a, *task;
    static char keytable0[0x80] = {
        0,   0,   '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '^', 0x08, 0,
        'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '@', '[', 0x0a, 0, 'A', 'S',
        'D', 'F', 'G', 'H', 'J', 'K', 'L', ';', ':', 0,   0,   ']', 'Z', 'X', 'C', 'V',
        'B', 'N', 'M', ',', '.', '/', 0,   '*', 0,   ' ', 0,   0,   0,   0,   0,   0,
        0,   0,   0,   0,   0,   0,   0,   '7', '8', '9', '-', '4', '5', '6', '+', '1',
        '2', '3', '0', '.', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
        0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
        0,   0,   0,   0x5c, 0,  0,   0,   0,   0,   0,   0,   0,   0,   0x5c, 0,  0
    };
    static char keytable1[0x80] = {
        0,   0,   '!', 0x22, '#', '$', '%', '&', 0x27, '(', ')', '~', '=', '~', 0x08, 0,
        'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '`', '{', 0x0a, 0, 'A', 'S',
        'D', 'F', 'G', 'H', 'J', 'K', 'L', '+', '*', 0,   0,   '}', 'Z', 'X', 'C', 'V',
        'B', 'N', 'M', '<', '>', '?', 0,   '*', 0,   ' ', 0,   0,   0,   0,   0,   0,
        0,   0,   0,   0,   0,   0,   0,   '7', '8', '9', '-', '4', '5', '6', '+', '1',
        '2', '3', '0', '.', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
        0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
        0,   0,   0,   '_', 0,   0,   0,   0,   0,   0,   0,   0,   0,   '|', 0,   0
    };
    int key_shift = 0, key_leds = (binfo->leds >> 4) & 7, keycmd_wait = -1;
    int j, x, y, mmx = -1, mmy = -1, mmx2 = 0;
    struct SHEET *sht = 0, *key_win, *sht2;
    int *fat;
    unsigned char *nihongo;
    struct FILEINFO *finfo;
    extern char hankaku[4096];

    init_gdtidt();
    init_pic();
    io_sti(); /* IDT/PIC偺弶婜壔偑廔傢偭偨偺偱CPU偺妱傝崬傒嬛巭傪夝彍 */
    fifo32_init(&fifo, 128, fifobuf, 0);
    *((int *) 0x0fec) = (int) &fifo;
    init_pit();
    init_keyboard(&fifo, 256);
    enable_mouse(&fifo, 512, &mdec);
    io_out8(PIC0_IMR, 0xf8); /* PIT偲PIC1偲僉乕儃乕僪傪嫋壜(11111000) */
    io_out8(PIC1_IMR, 0xef); /* 儅僂僗傪嫋壜(11101111) */
    fifo32_init(&keycmd, 32, keycmd_buf, 0);

    memtotal = memtest(0x00400000, 0xbfffffff);
    memman_init(memman);
    memman_free(memman, 0x00001000, 0x0009e000); /* 0x00001000 - 0x0009efff */
    memman_free(memman, 0x00400000, memtotal - 0x00400000);

    init_palette();
    shtctl = shtctl_init(memman, binfo->vram, binfo->scrnx, binfo->scrny);
    task_a = task_init(memman);
    fifo.task = task_a;
    task_run(task_a, 1, 2);
    *((int *) 0x0fe4) = (int) shtctl;
    task_a->langmode = 0;

    /* sht_back */
    sht_back  = sheet_alloc(shtctl);
    buf_back  = (unsigned char *) memman_alloc_4k(memman, binfo->scrnx * binfo->scrny);
    sheet_setbuf(sht_back, buf_back, binfo->scrnx, binfo->scrny, -1); /* 摟柧怓側偟 */
    init_screen8(buf_back, binfo->scrnx, binfo->scrny);

    /* sht_cons */
    key_win = open_console(shtctl, memtotal);

    /* sht_mouse */
    sht_mouse = sheet_alloc(shtctl);
    sheet_setbuf(sht_mouse, buf_mouse, 16, 16, 99);
    init_mouse_cursor8(buf_mouse, 99);
    mx = (binfo->scrnx - 16) / 2; /* 夋柺拞墰偵側傞傛偆偵嵗昗寁嶼 */
    my = (binfo->scrny - 28 - 16) / 2;

    sheet_slide(sht_back,  0,  0);
    sheet_slide(key_win,   32, 4);
    sheet_slide(sht_mouse, mx, my);
    sheet_updown(sht_back,  0);
    sheet_updown(key_win,   1);
    sheet_updown(sht_mouse, 2);
    keywin_on(key_win);

    /* 嵟弶偵僉乕儃乕僪忬懺偲偺怘偄堘偄偑側偄傛偆偵丄愝掕偟偰偍偔偙偲偵偡傞 */
    fifo32_put(&keycmd, KEYCMD_LED);
    fifo32_put(&keycmd, key_leds);

    /* nihongo.fnt偺撉傒崬傒 */
    fat = (int *) memman_alloc_4k(memman, 4 * 2880);
    file_readfat(fat, (unsigned char *) (ADR_DISKIMG + 0x000200));

    finfo = file_search("nihongo.fnt", (struct FILEINFO *) (ADR_DISKIMG + 0x002600), 224);
    if (finfo != 0) {
        i = finfo->size;
        nihongo = file_loadfile2(finfo->clustno, &i, fat);
    } else {
        nihongo = (unsigned char *) memman_alloc_4k(memman, 16 * 256 + 32 * 94 * 47);
        for (i = 0; i < 16 * 256; i++) {
            nihongo[i] = hankaku[i]; /* 僼僅儞僩偑側偐偭偨偺偱敿妏晹暘傪僐僺乕 */
        }
        for (i = 16 * 256; i < 16 * 256 + 32 * 94 * 47; i++) {
            nihongo[i] = 0xff; /* 僼僅儞僩偑側偐偭偨偺偱慡妏晹暘傪0xff偱杽傔恠偔偡 */
        }
    }
    *((int *) 0x0fe8) = (int) nihongo;
    memman_free_4k(memman, (int) fat, 4 * 2880);

    for (;;) {
        if (fifo32_status(&keycmd) > 0 && keycmd_wait < 0) {
            /* 僉乕儃乕僪僐儞僩儘乕儔偵憲傞僨乕僞偑偁傟偽丄憲傞 */
            keycmd_wait = fifo32_get(&keycmd);
            wait_KBC_sendready();
            io_out8(PORT_KEYDAT, keycmd_wait);
        }
        io_cli();
        if (fifo32_status(&fifo) == 0) {
            /* FIFO偑偐傜偭傐偵側偭偨偺偱丄曐棷偟偰偄傞昤夋偑偁傟偽幚峴偡傞 */
            if (new_mx >= 0) {
                io_sti();
                sheet_slide(sht_mouse, new_mx, new_my);
                new_mx = -1;
            } else if (new_wx != 0x7fffffff) {
                io_sti();
                sheet_slide(sht, new_wx, new_wy);
                new_wx = 0x7fffffff;
            } else {
                task_sleep(task_a);
                io_sti();
            }
        } else {
            i = fifo32_get(&fifo);
            io_sti();
            if (key_win != 0 && key_win->flags == 0) {    /* 僂傿儞僪僂偑暵偠傜傟偨 */
                if (shtctl->top == 1) {    /* 傕偆儅僂僗偲攚宨偟偐側偄 */
                    key_win = 0;
                } else {
                    key_win = shtctl->sheets[shtctl->top - 1];
                    keywin_on(key_win);
                }
            }
            if (256 <= i && i <= 511) { /* 僉乕儃乕僪僨乕僞 */
                if (i < 0x80 + 256) { /* 僉乕僐乕僪傪暥帤僐乕僪偵曄姺 */
                    if (key_shift == 0) {
                        s[0] = keytable0[i - 256];
                    } else {
                        s[0] = keytable1[i - 256];
                    }
                } else {
                    s[0] = 0;
                }
                if ('A' <= s[0] && s[0] <= 'Z') {    /* 擖椡暥帤偑傾儖僼傽儀僢僩 */
                    if (((key_leds & 4) == 0 && key_shift == 0) ||
                            ((key_leds & 4) != 0 && key_shift != 0)) {
                        s[0] += 0x20;    /* 戝暥帤傪彫暥帤偵曄姺 */
                    }
                }
                if (s[0] != 0 && key_win != 0) { /* 捠忢暥帤丄僶僢僋僗儁乕僗丄Enter */
                    fifo32_put(&key_win->task->fifo, s[0] + 256);
                }
                if (i == 256 + 0x0f && key_win != 0) {    /* Tab */
                    keywin_off(key_win);
                    j = key_win->height - 1;
                    if (j == 0) {
                        j = shtctl->top - 1;
                    }
                    key_win = shtctl->sheets[j];
                    keywin_on(key_win);
                }
                if (i == 256 + 0x2a) {    /* 嵍僔僼僩 ON */
                    key_shift |= 1;
                }
                if (i == 256 + 0x36) {    /* 塃僔僼僩 ON */
                    key_shift |= 2;
                }
                if (i == 256 + 0xaa) {    /* 嵍僔僼僩 OFF */
                    key_shift &= ~1;
                }
                if (i == 256 + 0xb6) {    /* 塃僔僼僩 OFF */
                    key_shift &= ~2;
                }
                if (i == 256 + 0x3a) {    /* CapsLock */
                    key_leds ^= 4;
                    fifo32_put(&keycmd, KEYCMD_LED);
                    fifo32_put(&keycmd, key_leds);
                }
                if (i == 256 + 0x45) {    /* NumLock */
                    key_leds ^= 2;
                    fifo32_put(&keycmd, KEYCMD_LED);
                    fifo32_put(&keycmd, key_leds);
                }
                if (i == 256 + 0x46) {    /* ScrollLock */
                    key_leds ^= 1;
                    fifo32_put(&keycmd, KEYCMD_LED);
                    fifo32_put(&keycmd, key_leds);
                }
                if (i == 256 + 0x3b && key_shift != 0 && key_win != 0) {    /* Shift+F1 */
                    task = key_win->task;
                    if (task != 0 && task->tss.ss0 != 0) {
                        cons_putstr0(task->cons, "\nBreak(key) :\n");
                        io_cli();    /* 嫮惂廔椆張棟拞偵僞僗僋偑曄傢傞偲崲傞偐傜 */
                        task->tss.eax = (int) &(task->tss.esp0);
                        task->tss.eip = (int) asm_end_app;
                        io_sti();
                        task_run(task, -1, 0);    /* 廔椆張棟傪妋幚偵傗傜偣傞偨傔偵丄怮偰偄偨傜婲偙偡 */
                    }
                }
                if (i == 256 + 0x3c && key_shift != 0) {    /* Shift+F2 */
                    /* 怴偟偔嶌偭偨僐儞僜乕儖傪擖椡慖戰忬懺偵偡傞乮偦偺傎偆偑恊愗偩傛偹丠乯 */
                    if (key_win != 0) {
                        keywin_off(key_win);
                    }
                    key_win = open_console(shtctl, memtotal);
                    sheet_slide(key_win, 32, 4);
                    sheet_updown(key_win, shtctl->top);
                    keywin_on(key_win);
                }
                if (i == 256 + 0x57) {    /* F11 */
                    sheet_updown(shtctl->sheets[1], shtctl->top - 1);
                }
                if (i == 256 + 0xfa) {    /* 僉乕儃乕僪偑僨乕僞傪柍帠偵庴偗庢偭偨 */
                    keycmd_wait = -1;
                }
                if (i == 256 + 0xfe) {    /* 僉乕儃乕僪偑僨乕僞傪柍帠偵庴偗庢傟側偐偭偨 */
                    wait_KBC_sendready();
                    io_out8(PORT_KEYDAT, keycmd_wait);
                }
            } else if (512 <= i && i <= 767) { /* 儅僂僗僨乕僞 */
                if (mouse_decode(&mdec, i - 512) != 0) {
                    /* 儅僂僗僇乕僜儖偺堏摦 */
                    mx += mdec.x;
                    my += mdec.y;
                    if (mx < 0) {
                        mx = 0;
                    }
                    if (my < 0) {
                        my = 0;
                    }
                    if (mx > binfo->scrnx - 1) {
                        mx = binfo->scrnx - 1;
                    }
                    if (my > binfo->scrny - 1) {
                        my = binfo->scrny - 1;
                    }
                    new_mx = mx;
                    new_my = my;
                    if ((mdec.btn & 0x01) != 0) {
                        /* 嵍儃僞儞傪墴偟偰偄傞 */
                        if (mmx < 0) {
                            /* 捠忢儌乕僪偺応崌 */
                            /* 忋偺壓偠偒偐傜弴斣偵儅僂僗偑巜偟偰偄傞壓偠偒傪扵偡 */
                            for (j = shtctl->top - 1; j > 0; j--) {
                                sht = shtctl->sheets[j];
                                x = mx - sht->vx0;
                                y = my - sht->vy0;
                                if (0 <= x && x < sht->bxsize && 0 <= y && y < sht->bysize) {
                                    if (sht->buf[y * sht->bxsize + x] != sht->col_inv) {
                                        sheet_updown(sht, shtctl->top - 1);
                                        if (sht != key_win) {
                                            keywin_off(key_win);
                                            key_win = sht;
                                            keywin_on(key_win);
                                        }
                                        if (3 <= x && x < sht->bxsize - 3 && 3 <= y && y < 21) {
                                            mmx = mx;    /* 僂傿儞僪僂堏摦儌乕僪傊 */
                                            mmy = my;
                                            mmx2 = sht->vx0;
                                            new_wy = sht->vy0;
                                        }
                                        if (sht->bxsize - 21 <= x && x < sht->bxsize - 5 && 5 <= y && y < 19) {
                                            /* 乽亊乿儃僞儞僋儕僢僋 */
                                            if ((sht->flags & 0x10) != 0) {        /* 傾僾儕偑嶌偭偨僂傿儞僪僂偐丠 */
                                                task = sht->task;
                                                cons_putstr0(task->cons, "\nBreak(mouse) :\n");
                                                io_cli();    /* 嫮惂廔椆張棟拞偵僞僗僋偑曄傢傞偲崲傞偐傜 */
                                                task->tss.eax = (int) &(task->tss.esp0);
                                                task->tss.eip = (int) asm_end_app;
                                                io_sti();
                                                task_run(task, -1, 0);
                                            } else {    /* 僐儞僜乕儖 */
                                                task = sht->task;
                                                sheet_updown(sht, -1); /* 偲傝偁偊偢旕昞帵偵偟偰偍偔 */
                                                keywin_off(key_win);
                                                key_win = shtctl->sheets[shtctl->top - 1];
                                                keywin_on(key_win);
                                                io_cli();
                                                fifo32_put(&task->fifo, 4);
                                                io_sti();
                                            }
                                        }
                                        break;
                                    }
                                }
                            }
                        } else {
                            /* 僂傿儞僪僂堏摦儌乕僪偺応崌 */
                            x = mx - mmx;    /* 儅僂僗偺堏摦検傪寁嶼 */
                            y = my - mmy;
                            new_wx = (mmx2 + x + 2) & ~3;
                            new_wy = new_wy + y;
                            mmy = my;    /* 堏摦屻偺嵗昗偵峏怴 */
                        }
                    } else {
                        /* 嵍儃僞儞傪墴偟偰偄側偄 */
                        mmx = -1;    /* 捠忢儌乕僪傊 */
                        if (new_wx != 0x7fffffff) {
                            sheet_slide(sht, new_wx, new_wy);    /* 堦搙妋掕偝偣傞 */
                            new_wx = 0x7fffffff;
                        }
                    }
                }
            } else if (768 <= i && i <= 1023) {    /* 僐儞僜乕儖廔椆張棟 */
                close_console(shtctl->sheets0 + (i - 768));
            } else if (1024 <= i && i <= 2023) {
                close_constask(taskctl->tasks0 + (i - 1024));
            } else if (2024 <= i && i <= 2279) {    /* 僐儞僜乕儖偩偗傪暵偠傞 */
                sht2 = shtctl->sheets0 + (i - 2024);
                memman_free_4k(memman, (int) sht2->buf, 256 * 165);
                sheet_free(sht2);
            }
        }
    }
}

void keywin_off(struct SHEET *key_win)
{
    change_wtitle8(key_win, 0);
    if ((key_win->flags & 0x20) != 0) {
        fifo32_put(&key_win->task->fifo, 3); /* 僐儞僜乕儖偺僇乕僜儖OFF */
    }
    return;
}

void keywin_on(struct SHEET *key_win)
{
    change_wtitle8(key_win, 1);
    if ((key_win->flags & 0x20) != 0) {
        fifo32_put(&key_win->task->fifo, 2); /* 僐儞僜乕儖偺僇乕僜儖ON */
    }
    return;
}

struct TASK *open_constask(struct SHEET *sht, unsigned int memtotal)
{
    struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    struct TASK *task = task_alloc();
    int *cons_fifo = (int *) memman_alloc_4k(memman, 128 * 4);
    task->cons_stack = memman_alloc_4k(memman, 64 * 1024);
    task->tss.esp = task->cons_stack + 64 * 1024 - 12;
    task->tss.eip = (int) &console_task;
    task->tss.es = 1 * 8;
    task->tss.cs = 2 * 8;
    task->tss.ss = 1 * 8;
    task->tss.ds = 1 * 8;
    task->tss.fs = 1 * 8;
    task->tss.gs = 1 * 8;
    *((int *) (task->tss.esp + 4)) = (int) sht;
    *((int *) (task->tss.esp + 8)) = memtotal;
    task_run(task, 2, 2); /* level=2, priority=2 */
    fifo32_init(&task->fifo, 128, cons_fifo, task);
    return task;
}

struct SHEET *open_console(struct SHTCTL *shtctl, unsigned int memtotal)
{
    struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    struct SHEET *sht = sheet_alloc(shtctl);
    unsigned char *buf = (unsigned char *) memman_alloc_4k(memman, 256 * 165);
    sheet_setbuf(sht, buf, 256, 165, -1); /* 摟柧怓側偟 */
    make_window8(buf, 256, 165, "My-OS", 0);
    make_textbox8(sht, 8, 28, 240, 128, COL8_000000);
    sht->task = open_constask(sht, memtotal);
    sht->flags |= 0x20;    /* 僇乕僜儖偁傝 */
    return sht;
}

void close_constask(struct TASK *task)
{
    struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    task_sleep(task);
    memman_free_4k(memman, task->cons_stack, 64 * 1024);
    memman_free_4k(memman, (int) task->fifo.buf, 128 * 4);
    task->flags = 0; /* task_free(task); 偺戙傢傝 */
    return;
}

void close_console(struct SHEET *sht)
{
    struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
    struct TASK *task = sht->task;
    memman_free_4k(memman, (int) sht->buf, 256 * 165);
    sheet_free(sht);
    close_constask(task);
    return;
}

Answer 1

• 以下回答由chatgpt基于相关博客总结生成:

  根据问题描述，你想修改《30天自制操作系统》中的命令行窗口大小。你尝试过修改源代码中的窗口大小，但只改变了整体窗口大小，没有改变内嵌的命令行窗口大小。你想知道如何修改内嵌的命令行窗口大小。

  首先，我们需要了解原书提供的代码是如何创建和显示命令行窗口的。通过阅读代码，需要修改的部分应该是图层管理器（layer manager）中的consoleNewline（用于定位命令行窗口的新行）和consolePutchar（用于在命令行窗口输出字符）函数。

  下面是实现改变命令行窗口大小的步骤与代码示例：

  步骤1: 定义一个用于存储命令行窗口大小的全局变量。可以在全局变量定义的地方增加以下代码：

  int consWidth = 80; // 定义命令行窗口宽度，默认为80
  int consHeight = 25; // 定义命令行窗口高度，默认为25
  

  步骤2: 在consoleNewline函数中，修改计算插入新行位置的部分。将原来的*p = COL8_000000;代码修改为以下代码：

  int x, y;
  struct SHEET *sht = shtctl->sheets[layer - 1];
  char *buf = sht->buf;
  if (sht->flags & 0x10) {
      // 自动换行
      sht->cursor_x = 0;
      sht->cursor_y++;
      if (sht->cursor_y >= consHeight) {
          sht->cursor_y = 0;
      }
  } else {
      // 固定高度
      if (sht->cursor_y < consHeight - 1) {
          sht->cursor_y++;
      } else {
          // 滚动屏幕
          for (y = 0; y < consHeight - 1; y++) {
              for (x = 0; x < consWidth; x++) {
                  buf[x + y * consWidth] = buf[x + (y + 1) * consWidth];
              }
          }
          for (x = 0; x < consWidth; x++) {
              buf[x + (consHeight - 1) * consWidth] = COL8_000000; 
          }
          sht->cursor_y = consHeight - 1;
      }
  }
  

  步骤3: 在consolePutchar函数中，修改输出字符的部分。将原来的buf[sht->cursor_x + sht->cursor_y * consWidth] = c;代码修改为以下代码：

  if (c == '\n') { // 换行
      consoleNewline(sht, 1);
  } else {
      if (sht->cursor_x < consWidth - 1) {
          buf[sht->cursor_x + sht->cursor_y * consWidth] = c; // 输出字符
          sht->cursor_x++;
      }
  }
  

  通过这样的修改，你应该能够改变内嵌的命令行窗口的大小。

  希望以上解决方案能够帮助到你，如果你有任何疑问，请随时向我提问。