Add-in development tools for fx-9860G and fx-CG 50, to use with GCC and gint.
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63 lines
1.5 KiB

#include <string.h>
#include <ctype.h>
#include <endianness.h>
#include <fxg1a.h>
/*
** Public API
*/
/* checksum(): Sum of 8 big-endian shorts at 0x300 */
uint16_t checksum(struct g1a const *g1a, size_t size)
{
uint16_t shorts[16] = { 0 };
/* Extract 16 bytes from the file (maybe less are available) */
int available = size - 0x300;
if(available < 0) available = 0;
if(available > 16) available = 16;
memcpy(shorts, g1a->code + 0x100, available);
/* Do the big-endian sum */
uint16_t sum = 0;
for(int i = 0; i < 8; i++) sum += htobe16(shorts[i]);
return sum;
}
/* default_output(): Calculate default output file name */
void default_output(const char *name, const char *suffix, char *output)
{
/* Check if there is a dot at the end of @name, before the last '/'.
The dot must also not be in first position (hidden files) */
size_t end = strlen(name) - 1;
while(end >= 1 && name[end] != '/' && name[end] != '.') end--;
/* If we don't have a dot in the file name, append the extension */
if(end < 1 || name[end] != '.')
{
strcpy(output, name);
strcat(output, suffix);
}
/* If we found a dot before the last slash, replace the extension */
else
{
memcpy(output, name, end);
strcpy(output + end, suffix);
}
}
/* default_internal(): Calculate default internal name */
void default_internal(const char *name, char *output)
{
output[0] = '@';
int i=1;
for(int j=0; name[j] && i < 8; j++)
{
if(isalpha(name[j])) output[i++] = toupper(name[j]);
}
output[i] = 0;
}