diff options
| -rw-r--r-- | dla2csv.c | 83 |
1 files changed, 71 insertions, 12 deletions
@@ -36,25 +36,33 @@ char *eoltypes[][2] = { { NULL, NULL } }; -/* read a string from stdin (E: on the Atari). there could - be error checking here, but there's not. */ +/* read a string from stdin (E: on the Atari). + exit on EOF (or Break key on the Atari). */ void readstring(void) { - fgets(stringbuf, 256, stdin); + if(fgets(stringbuf, 256, stdin) == NULL) + exit(1); } /* prompt for a filename, try to open it. if there's an error, show error message and retry. will not return until it - opens the file. - there could be code here to prepend D: if it's missing, but - there isn't. - */ + opens the file. */ FILE *prompt_filename(const char *name, const char *mode) { FILE *f = NULL; + putchar('\n'); while(f == NULL) { - printf("\n%s file: ", name); + printf("%s file: ", name); fflush(stdout); readstring(); - stringbuf[strlen(stringbuf) - 1] = '\0'; + stringbuf[strlen(stringbuf) - 1] = '\0'; /* kill trailing \n */ + if(strlen(stringbuf) == 0) continue; +#ifdef __ATARI__ + /* if there's no device spec (D: or D1: etc), prepend D: */ + if(!strchr(stringbuf, ':')) { + memmove(stringbuf+2, stringbuf, strlen(stringbuf)); + stringbuf[0] = 'D'; + stringbuf[1] = ':'; + } +#endif f = fopen(stringbuf, mode); if(!f) perror(stringbuf); } @@ -96,10 +104,31 @@ void backspace3(void) { int main(int argc, char **argv) { char *inp, *eol; - int bytes = 0, x, y, xmask; + int i, bytes = 0, x, y, xmask, warn; + +#ifdef __ATARI__ + /* cc65's startup code turns off caps lock. turn it back on, + since we're typing DOS filenames. in BASIC this would be: + POKE 702,64 */ + *((char *)0x02be) = 0x40; + + /* clear the screen */ + putchar(0x7d); +#endif + + printf("DLA to CSV converter.\n\n"); + +#ifdef __ATARI__ + /* Atari users aren't used to typing an EOF to exit */ + printf("Note: Press Ctrl-3 or Break at any\nprompt to exit this program.\n"); +#endif - printf("DLA to CSV converter.\n"); while(1) { + warn = 0; + + /* in case of short read on 2nd or later conversion: */ + memset(inbuf, 0, INBUF_SIZE); + /* read whole input file into memory */ inf = prompt_filename("Input DLA", "rb"); printf("Reading..."); @@ -109,9 +138,39 @@ int main(int argc, char **argv) { perror(stringbuf); continue; } - fclose(inf); printf("Read %d bytes.\n", bytes); + /* warn if the file size is wrong... */ + if(bytes < INBUF_SIZE) { + printf("Warning: File too short!\n"); + warn = 1; + } else if(fgetc(inf) != EOF) { + printf("Warning: File too long!\n"); + warn = 1; + } else { + printf("File size is OK.\n"); + } + fclose(inf); + + /* a DLA file never has non-zero bytes at the beginning. */ + for(i = 0; i < 32; i++) { + if(inbuf[i]) { + printf("Warning: File doesn't look like a DLA!\n"); + warn = 1; + break; + } + } + + /* if anything looks wrong, we shouldn't proceed... but the user + is boss, so give him the choice to shoot himself in the foot. */ + if(warn) { + printf("Try to convert anyway[y/N]? "); + fflush(stdout); + readstring(); + if(stringbuf[0] != 'y' && stringbuf[0] != 'Y') + continue; + } + eol = prompt_eol(); outf = prompt_filename("Output CSV", "wb"); |