68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* Generates BUZBEE command hash data table asm file */
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#include <stdint.h>
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#include <stdio.h>
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/* Length of commands in printable-char count (excluding NUL terminator). */
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const int s_cchCmd = 4;
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/* Add your commands here to be hashed. Imprtant that they all be CCH_CMD
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* chars long EXCLUDING the NUL terminator. Order is important here. */
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const char *s_ppszCmds[] = {
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"CALL",
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"HELP",
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"PEEK",
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"POKE",
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"SREC",
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/* "BOOT", */
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};
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int mkHash(const char pszCmd[]);
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int main(void) {
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/* Emit file header */
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puts("; CHIBI PC-09 -- BUZBEE -- Command Hash Table\n\
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; Copyright (c) 2025 Gale Faraday\n\
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; Licensed under MIT\n\
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\n\
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; This file generated by bbmkhash.c\n\
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\n\
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n\
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;;\n\
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;; BUZBEE Command Hash Table\n\
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;;\n\
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n\
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\n\
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SECTION BBHASHES\n\
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\n\
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EXPORT BBCHTC\n\
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EXPORT BBCHT\n");
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/* Command count.
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* NOTE: This is a u16 because it gets emitted into the output assembly. */
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uint16_t cCmds = sizeof(s_ppszCmds) / sizeof(char *);
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/* Emit command count */
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printf("BBCHTC\n fdb $%.4X\n", cCmds);
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/* Emit table data */
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puts("\nBBCHT");
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for (int iCmd = 0; iCmd < cCmds; iCmd++) {
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uint8_t uHash = mkHash(s_ppszCmds[iCmd]);
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printf(" fcb $%.2X\n", uHash);
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}
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return 0;
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}
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int mkHash(const char pszCmd[]) {
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uint8_t nhash = 0;
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/* NOTE: Very important that condition is the length of the string MINUS the
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* NUL terminator, in this case iChar < 4 */
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for (int iChar = 0; iChar < s_cchCmd; iChar++)
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nhash = nhash - pszCmd[iChar];
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return nhash;
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}
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