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lib6502.c
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lib6502.c
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/* Library manager for the 6502 set */
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "as6502.h"
#include "compat.h"
#include "jos.h"
#include "obj65.h"
struct lib {
char modname[13];
unsigned filelen;
void *thefile;
struct lib *next;
int deleted;
};
char *libname = NULL;
char *flagL = NULL;
struct lib *root = NULL;
void fatal(char *s, ...) {
va_list args;
char line[132];
va_start(args, s);
vsprintf(line, s, args);
va_end(args);
printf("FATAL: %s\n", line);
exit(1);
}
#define READ(a, b, c) \
if (read(a, b, c) != c) \
fatal("Library corrupt")
#define WRITE(a, b, c) \
if (write(a, b, c) != c) \
fatal("Error writing library")
void writeout2(struct lib *libmem, int handle) {
if (!libmem)
return;
else
writeout2(libmem->next, handle);
if (libmem->deleted)
return;
WRITE(handle, libmem->modname, 13);
WRITE(handle, (char *)&libmem->filelen, 2);
WRITE(handle, libmem->thefile, libmem->filelen);
}
void writeout() {
int handle = open(libname, O_WRONLY | O_TRUNC);
writeout2(root, handle);
close(handle);
}
void bringin() {
struct lib *work;
int readd;
int handle = open(libname, O_RDONLY | O_CREAT, 255);
char modname[13];
if (handle == -1) {
perror("Library open error");
exit(999);
}
while (1) {
readd = read(handle, modname, 13);
if (readd == 0)
break;
if (readd != 13)
fatal("Library corrupt");
work = GETCORE(struct lib);
work->next = root;
root = work;
work->deleted = 0;
strcpy(work->modname, modname);
READ(handle, (char *)&work->filelen, 2);
work->thefile = malloc(work->filelen);
READ(handle, work->thefile, work->filelen);
}
close(handle);
}
struct lib *bringin2a(const char *modname) {
struct lib *work;
char drive[MAXDRIVE];
char dir[MAXDIR];
char file[MAXFILE];
char newpath[MAXPATH];
char ext[MAXEXT];
int handle = open(modname, O_RDONLY);
work = GETCORE(struct lib);
work->filelen = work->deleted = 0;
work->next = work->thefile = NULL;
fnsplit(modname, drive, dir, file, ext);
fnmerge(newpath, NULL, NULL, file, ext);
strcpy(work->modname, newpath);
if (handle != -1) {
work->filelen = filelength(handle);
work->thefile = malloc(work->filelen);
if (read(handle, work->thefile, work->filelen) != work->filelen)
fatal("Object file %s corrupt", modname);
close(handle);
}
return work;
}
struct lib *bringin2(const char *modname) {
char drive[MAXDRIVE];
char dir[MAXDIR];
char file[MAXFILE];
char newpath[MAXPATH];
char ext[MAXEXT];
struct lib *work;
work = bringin2a(modname);
if (work->thefile)
return work;
fnsplit(modname, drive, dir, file, ext);
if (ext[0])
return work;
fnmerge(newpath, drive, dir, file, ".O65");
free(work);
work = bringin2a(newpath);
return work;
}
struct lib *search(const char *name) {
struct lib *walk;
walk = root;
while (walk) {
if (strcmp(walk->modname, name) == 0 && !walk->deleted)
return walk;
walk = walk->next;
}
return NULL;
}
#define EXISTS(a) \
if (!((a)->thefile)) \
fatal("Object file %s not found", (a)->modname)
void oadd(struct lib *obj) {
EXISTS(obj);
if (search(obj->modname))
fatal("Module %s already in library", obj->modname);
obj->next = root;
root = obj;
}
void oupdate(struct lib *obj) {
struct lib *work;
EXISTS(obj);
work = search(obj->modname);
if (!work)
oadd(obj);
work->filelen = obj->filelen;
free(work->thefile);
work->thefile = obj->thefile;
free(obj);
}
void odelete(struct lib *obj) {
struct lib *work = search(obj->modname);
if (!work)
fatal("Module %s not in library", obj->modname);
work->deleted = 1;
}
void ocopy(struct lib *obj) {
struct lib *work = search(obj->modname);
int handle;
if (!work)
fatal("Module %s not in library", obj->modname);
handle = open(obj->modname, O_WRONLY | O_CREAT | O_TRUNC, 255);
if (write(handle, work->thefile, work->filelen) != work->filelen)
fatal("Error copying module %s from library", obj->modname);
close(handle);
}
void perform(struct lib *obj, const char *action) {
if (strcmp(action, "+ ") == 0)
oadd(obj);
else if (strcmp(action, "- ") == 0)
odelete(obj);
else if (strcmp(action, "* ") == 0)
ocopy(obj);
else if (strcmp(action, "+-") == 0)
oupdate(obj);
else
fatal("Invalid action %s on %s", action, obj);
}
void doit(int argc, char *argv[]) {
char drive[MAXDRIVE];
char dir[MAXDIR];
char file[MAXFILE];
char newpath[MAXPATH];
char ext[MAXEXT];
int i;
char *par;
char action[3];
struct lib *obj;
if (argc == 1) {
puts("Usage: LIB6502 <libfile> [([+][-][+-]<objfile>)*] [-l]");
exit(1);
}
fnsplit(argv[1], drive, dir, file, ext);
if (ext[0] == '\0')
strcpy(ext, ".L65");
fnmerge(newpath, drive, dir, file, ext);
libname = strdup(newpath);
bringin();
for (i = 2; i < argc; i++) {
par = argv[i];
strupr(par);
if (strcmp(par, "-L") == 0) {
fnsplit(libname, drive, dir, file, ext);
fnmerge(newpath, drive, dir, file, ".LST");
flagL = strdup(newpath);
} else {
strcpy(action, " ");
action[0] = *par;
if (*par == '+' && *(par + 1) == '-') {
par++;
action[1] = '-';
}
if (*par == '-' && *(par + 1) == '+') {
par++;
action[0] = '+';
action[1] = '-';
}
obj = bringin2(++par);
perform(obj, action);
}
}
writeout();
}
int main(int argc, char *argv[]) {
puts("LIB6502 -- The 6502 library manager");
puts(" (c) Copyright 1990-2019 Jos Visser\n");
doit(argc, argv);
return 0;
}