xa65/xa/src/xam.c

/* xa65 - 65xx/65816 cross-assembler and utility suite
 *
 * Copyright (C) 1989-1997 Andr<64> Fachat (a.fachat@physik.tu-chemnitz.de)
 *
 * Memory manager/malloc() stub module
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "xah.h"         /*   structs        */

static int ninc = 0;
static char **nip = NULL;

void reg_include(char *path) {
	char **nip2;
	if (path && *path) {
		nip2 = realloc(nip, sizeof(char*) * (ninc + 1));
		if (nip2) {
			nip = nip2;
			nip[ninc++] = path;
		} else {
			fprintf(stderr, "Warning: couldn' alloc mem (reg_include)\n");
		}
	}
}

FILE* xfopen(const char *fn, const char *mode) {
	FILE *file;
	char c, *cp, n[MAXLINE], path[MAXLINE];
	char xname[MAXLINE], n2[MAXLINE];
	int i, l = (int) strlen(fn);

	if (l >= MAXLINE) {
		fprintf(stderr, "filename '%s' too long!\n", fn);
		return NULL;
	}

	// copy to xname by replacing windows backslashes with the proper DIRCHAR
	for (i = 0; i < l + 1; i++) {
		xname[i] = ((fn[i] == '\\') ? DIRCHAR : fn[i]);
	}

	//printf("name=%s, xname=%s, mode=%s\n",fn,xname, mode); 

	if (mode[0] == 'r') {
		if ((file = fopen(fn, mode)) == NULL
				&& (file = fopen(xname, mode)) == NULL) {
			for (i = 0; (!file) && (i < ninc); i++) {
				strcpy(n, nip[i]);
				c = n[(int) strlen(n) - 1];
				if (c != DIRCHAR)
					strcat(n, DIRCSTRING);
				strcpy(n2, n);
				strcat(n2, xname);
				strcat(n, fn);
				file = fopen(n, mode);
				if (!file)
					file = fopen(n2, mode);
			}
			if ((!file) && (cp = getenv("XAINPUT")) != NULL) {
				strcpy(path, cp);
				cp = strtok(path, ",");
				while (cp && !file) {
					if (cp[0]) {
						strcpy(n, cp);
						c = n[(int) strlen(n) - 1];
						if (c != DIRCHAR && c != ':')
							strcat(n, DIRCSTRING);
						strcpy(n2, n);
						strcat(n2, xname);
						strcat(n, fn);
						file = fopen(n, mode);
						if (!file)
							file = fopen(n2, mode);
					}
					cp = strtok(NULL, ",");
				}
			}
		}
	} else {
		if ((cp = getenv("XAOUTPUT")) != NULL) {
			strcpy(n, cp);
			if (n[0]) {
				c = n[(int) strlen(n) - 1];
				if (c != DIRCHAR && c != ':')
					strcat(n, DIRCSTRING);
			}
			cp = strrchr(fn, DIRCHAR);
			if (!cp) {
				cp = strrchr(fn, ':');
				if (!cp)
					cp = (char*) fn;
				else
					cp++;
			} else
				cp++;
			strcat(n, cp);
			file = fopen(n, mode);
		} else
			file = fopen(fn, mode);
	}
	if (file)
		setvbuf(file, NULL, _IOFBF, BUFSIZE);

	return (file);
}

#if 0

static char *m_base;
static char *m_act;
static char *m_end;

int m_init(void) 
{
     int er=E_NOMEM;

     m_base=m_end=m_act=0L;
/*
     fprintf(stderr, "MEMLEN=%ld\n",MEMLEN);
     getchar();
*/    
/*
     if ((m_base=(char*)malloc(MEMLEN))!=NULL)
     {
          m_end =m_base+MEMLEN;
          m_act =(char*)(((long)m_base+3)&0xfffffffcl);
          er=E_OK;
     }
     else m_base=NULL;
*/
    er=E_OK;

     return(er);
}

void m_exit(void)
{
/*
	free(m_base);
*/
}

int m_alloc(long n, char **adr)
{
     int er=E_NOMEM;

     if((*adr=calloc(n,1))) {
	er=E_OK;
     }
/*
     if(m_act+n<m_end)
     {
          *adr=m_act;
          m_act=m_act+n;
          er=E_OK;
     }
*/
/*
     fprintf(stderr, "m_alloc n=%ld adr=%lx\n",n,*adr);
     getchar();
*/     
     return(er);
}

#endif