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VMBoxGen: minor refactoring

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This commit is contained in:
CPunch
2022-10-08 18:32:33 -05:00
parent 5076e4c7b9
commit 7c4a5ddc8c
4 changed files with 36 additions and 24 deletions
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32
tools/vmboxgen/src/main.c
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@@ -13,11 +13,12 @@
} while (0);
#define RANDBYTE (rand() % UINT8_MAX)
static const char *PREAMBLE = "/* file generated by VMBoxGen, see tools/vmboxgen/src/main.c "
"*/\n#ifndef LAIKA_VMBOX_CONFIG_H\n#define LAIKA_VMBOX_CONFIG_H\n\n";
static const char *PREAMBLE = "/* file generated by VMBoxGen, see tools/vmboxgen/src/main.c */\n"
"#ifndef LAIKA_VMBOX_CONFIG_H\n"
"#define LAIKA_VMBOX_CONFIG_H\n\n";
static const char *POSTAMBLE = "\n#endif\n";
void writeArray(FILE *out, uint8_t *data, int sz)
static void writeArray(FILE *out, uint8_t *data, int sz)
{
int i;
@@ -28,18 +29,18 @@ void writeArray(FILE *out, uint8_t *data, int sz)
fprintf(out, "0x%02x};\n", data[sz - 1]);
}
void writeDefineArray(FILE *out, char *ident, uint8_t *data)
static void writeDefineArray(FILE *out, char *ident, uint8_t *data)
{
fprintf(out, "#define %s ", ident);
writeArray(out, data, LAIKA_VM_CODESIZE);
}
void writeDefineVal(FILE *out, char *ident, int data)
static void writeDefineVal(FILE *out, char *ident, int data)
{
fprintf(out, "#define %s 0x%02x\n", ident, data);
}
void addPadding(uint8_t *data, int start)
static void addPadding(uint8_t *data, int start)
{
int i;
@@ -49,15 +50,15 @@ void addPadding(uint8_t *data, int start)
}
}
void makeSKIDdata(char *data, int sz, uint8_t *buff, int key)
static void makeSKIDdata(char *data, int sz, uint8_t *buff, int key)
{
int i;
for (i = 0; i < sz; i++)
buff[i] = data[i] ^ key;
buff[i++] = key; /* add the null terminator */
addPadding(buff, i);
buff[i++] = key; /* add the null terminator (key ^ key = 0x00) */
addPadding(buff, i); /* fill in the remaining bytes with semi-rand padding */
}
#define MAKESKIDDATA(macro) \
@@ -69,14 +70,17 @@ void makeSKIDdata(char *data, int sz, uint8_t *buff, int key)
int main(int argv, char **argc)
{
uint8_t tmpBuff[LAIKA_VM_CODESIZE];
int key;
FILE *out;
char *fileName;
int key;
if (argv < 2)
ERR("USAGE: %s [OUTFILE]\n", argv > 0 ? argc[0] : "BoxGen");
if ((out = fopen(argc[1], "w+")) == NULL)
ERR("Failed to open %s!\n", argc[1]);
/* open output file */
fileName = argc[1];
if ((out = fopen(fileName, "w+")) == NULL)
ERR("Failed to open %s!\n", fileName);
srand(time(NULL)); /* really doesn't need to be cryptographically secure, the point is only to
slow them down */
@@ -100,8 +104,8 @@ int main(int argv, char **argc)
fprintf(out, POSTAMBLE);
fclose(out);
printf("Wrote %s\n", argc[1]);
printf("Laika VMBox data header dumped to '%s'\n", fileName);
return 0;
}
#undef MAKEDATA
#undef MAKESKIDDATA