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#include "wsh_shell_misc.h"
#include "wsh_shell_str.h"

WshShell_U32_t WshShellMisc_CalcJenkinsHash(const WshShell_U8_t* pcBuff, WshShell_Size_t len) {
    WSH_SHELL_ASSERT(pcBuff);

    WshShell_U32_t hash = 0;
    for (WshShell_Size_t idx = 0; idx < len; idx++) {
        hash += pcBuff[idx];
        hash += hash << 10;
        hash ^= hash >> 6;
    }

    hash += hash << 3;
    hash ^= hash >> 11;
    hash += hash << 15;

    return hash;
}

void WshShellMisc_HexDump(const WshShell_U8_t* pBuff, WshShell_Size_t len, WshShell_Size_t offset) {
    WSH_SHELL_ASSERT(pBuff || len == 0);
    if (!pBuff && len > 0)
        return;

    for (WshShell_Size_t i = 0; i < len; i += WSH_HEXDUMP_COLS) {
        WSH_SHELL_PRINT("%08x  ", (unsigned)(offset + i));

        for (WshShell_Size_t j = 0; j < WSH_HEXDUMP_COLS; j++) {
            if (i + j < len)
                WSH_SHELL_PRINT("%02x ", (unsigned)pBuff[i + j]);
            else
                WSH_SHELL_PRINT("   ");
            if (j == 7)
                WSH_SHELL_PRINT(" ");
        }

        WSH_SHELL_PRINT(" |");
        for (WshShell_Size_t j = 0; j < WSH_HEXDUMP_COLS && i + j < len; j++) {
            WshShell_U8_t c = pBuff[i + j];
            WSH_SHELL_PRINT("%c", WshShellStr_IsPrintableAscii(c) ? (char)c : '.');
        }

        WSH_SHELL_PRINT("|\r\n");
    }
}

void WshShellMisc_AsciiPrint(const WshShell_U8_t* pBuff, WshShell_Size_t len) {
    WSH_SHELL_ASSERT(pBuff || len == 0);
    if (!pBuff && len > 0)
        return;

    for (WshShell_Size_t i = 0; i < len; i++) {
        char c = (char)pBuff[i];
        WSH_SHELL_PRINT("%c", WshShellStr_IsPrintableAscii(c) || c == '\r' || c == '\n' ? c : '.');
    }

    WSH_SHELL_PRINT("\r\n");
}