eda-tools/genex/libs.c

/*
 * libs.c - Component libraries
 *
 * Copyright 2012 by Werner Almesberger
 *
 * 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.
 */

#define	_GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>

#include "util.h"
#include "libs.h"


struct entry {
	const char *name;
	struct entry *next;
};

static struct lib {
	const char *path;
	struct entry *comps;
	struct lib *next;
} *libs = NULL;


const char *lookup_sym(const char *name, const char **canon)
{
	const struct lib *lib;
	const struct entry *e;

	for (lib = libs; lib; lib = lib->next)
		for (e = lib->comps; e; e = e->next)
			if (!strcasecmp(e->name, name)) {
				if (canon)
					*canon = e->name;
				return lib->path;
			}
	return NULL;
}


void add_lib(const char *path)
{
	FILE *file;
	struct lib *lib;
	struct entry *e;
	char buf[1024]; /* @@@ */
	char *spc;

	
	file = fopen(path, "r");
	if (!file) {
		perror(path);
		exit(1);
	}

	lib = alloc_type(struct lib);
	lib->path = stralloc(path);
	lib->comps = NULL;
	lib->next = libs;
	libs = lib;

	while (fgets(buf, sizeof(buf), file)) {
		if (strncmp(buf, "DEF ", 4))
			continue;
		spc = strchr(buf+4, ' ');
		if (!spc) {
			fprintf(stderr, "invalid DEF line in %s\n", path);
			exit(1);
		}
		*spc = 0;
		e = alloc_type(struct entry);
		e->name = stralloc(buf+4);
		e->next = lib->comps;
		lib->comps = e;
	}

	fclose(file);
}


void add_libdir(const char *path)
{
	DIR *dir;
	const struct dirent *de;
	size_t len;
	char *tmp;

	dir = opendir(path);
	if (!dir) {
		perror(path);
		exit(1);
	}
	while (1) {
		de = readdir(dir);
		if (!de)
			break;
		len = strlen(de->d_name);
		if (len < 4)
			continue;
		if (strcmp(de->d_name+len-4, ".lib"))
			continue;
		if (asprintf(&tmp, "%s/%s", path, de->d_name) < 0) {
			perror("asprintf");
			exit(1);
		}
		add_lib(tmp);
	}
	closedir(dir);
}