.gitignore - kandr - Some attempted solutions to exercises from K&R

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theCprogrammingLanguage.pdf

ame.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */

#include "random.h"
#include "devfs.h"
#include "device.h"
#include "common.h"
#include "process.h"
#include "sleep.h"

static BOOL random_open(File *file, uint32 flags);
static int32 random_read(File *file, uint32 size, uint8 *buffer);

void initializeRandom() {
    Device device;
    memset((uint8*)&device, 0, sizeof(Device));
    strcpy(device.name, "random");
    device.deviceType = FT_CharacterDevice;
    device.open = random_open;
    device.read = random_read;

    registerDevice(&device);
}

static BOOL random_open(File *file, uint32 flags) {
    return TRUE;
}

static int32 random_read(File *file, uint32 size, uint8 *buffer) {
    if (size == 0) {
        return 0;
    }

    //printkf("random_read: calling sleep\n");

    //sleep(10000);

    //printkf("random_read: returned from sleep\n");

    uint32 number = rand();

    if (size == 1) {
        *buffer = (uint8)number;
        return 1;
    }
    else if (size == 2 || size == 3) {
        *((uint16*)buffer) = (uint16)number;
        return 2;
    }
    else if (size >= 4) {
        //printkf("random_read: buffer is %x, writing %x to buffer\n", buffer, number);

        *((uint32*)buffer) = number;
        return 4;
    }

    return 0;
}