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LBN2PBN: Apply minor fixes and mention reverse conversion in README

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Tony Lawrence
2025-06-26 20:36:25 -04:00
committed by Timothe Litt
parent 405010f948
commit ca2930c70a
2 changed files with 11 additions and 8 deletions
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2
README.md
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@@ -27,7 +27,7 @@ gt7cvt | Convert a gt7 magtape dump to a SIMH magtape
hpconvert | Convert an HP disc image between SIMH and HPDrive formats hpconvert | Convert an HP disc image between SIMH and HPDrive formats
imd2dsk | Convert an ImageDisk (IMD) file to DSK (pure data) imd2dsk | Convert an ImageDisk (IMD) file to DSK (pure data)
indent | Convert simulator sources to 4-column tabs indent | Convert simulator sources to 4-column tabs
lbn2pbn | Logical-to-physical converter for single-sided floppy disk images lbn2pbn | Logical-to-physical (and reverse) converter for single-sided floppy disk images
littcvt | Remove density maker from litt format tapes littcvt | Remove density maker from litt format tapes
m8376 | Assembles 8 PROM files into a 32bit binary file m8376 | Assembles 8 PROM files into a 32bit binary file
mt2tpc | Convert a simh simulated magtape to TPC format mt2tpc | Convert a simh simulated magtape to TPC format

17
converters/lbn2pbn/lbn2pbn.c
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@@ -44,6 +44,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define SECTOR_MIN_SIZE 128
#define SECTOR_MAX_SIZE 512
inline inline
static size_t filesize(FILE* fp) static size_t filesize(FILE* fp)
@@ -162,8 +165,8 @@ int main(int argc, char* argv[])
break; break;
case 'B': case 'B':
sector_size = atoi(optarg); sector_size = atoi(optarg);
if ((sector_size & (sector_size - 1)) if (sector_size < SECTOR_MIN_SIZE || sector_size > SECTOR_MAX_SIZE
|| sector_size < 128 || sector_size > 512) { || (sector_size & (sector_size - 1))) {
sector_size = 0; sector_size = 0;
} }
break; break;
@@ -198,7 +201,7 @@ int main(int argc, char* argv[])
if (!(in = fopen(infile, "rb"))) { if (!(in = fopen(infile, "rb"))) {
perror(infile); perror(infile);
return 1; return EXIT_FAILURE;
} }
size = filesize(in); size = filesize(in);
@@ -206,18 +209,18 @@ int main(int argc, char* argv[])
max_size = q * sector_size; max_size = q * sector_size;
if (size > max_size) { if (size > max_size) {
fprintf(stderr, "%s: file size (%zd) may not exceed %zu\n", infile, size, max_size); fprintf(stderr, "%s: file size (%zd) may not exceed %zu\n", infile, size, max_size);
return 1; return EXIT_FAILURE;
} }
if (!(out = fopen(outfile, "wb"))) { if (!(out = fopen(outfile, "wb"))) {
perror(outfile); perror(outfile);
return 1; return EXIT_FAILURE;
} }
rewind(in); rewind(in);
round = lcm(sectors, interleave); round = lcm(sectors, interleave);
for (p = 0; p < q; ++p) { for (p = 0; p < q; ++p) {
char sector[512]; static unsigned char sector[SECTOR_MAX_SIZE];
int n = lbn2pbn(p); int n = lbn2pbn(p);
#ifdef _DEBUG #ifdef _DEBUG
printf("LBN %4d (%2d / %2d) = PBN %4d (%2d / %2d)\n", printf("LBN %4d (%2d / %2d) = PBN %4d (%2d / %2d)\n",
@@ -236,5 +239,5 @@ int main(int argc, char* argv[])
fclose(out); fclose(out);
fclose(in); fclose(in);
return 0; return EXIT_SUCCESS;
} }