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/*
* Parsing of per-module files.
*
* Copyright © 2025-2026 Samuel Lidén Borell <samuel@kodafritt.se>
*
* SPDX-License-Identifier: EUPL-1.2+ OR LGPL-2.1-or-later
*/
#include "compiler.h"
#include "token.h"
#include <assert.h>
#include <string.h>
unsigned num_sources = 0;
char *(sources[MAX_SOURCES]) = { 0 };
static struct TreeNode *dependencies = NULL;
struct DependencyInfo *dependencies_list = NULL;
void parse_source_index(FILE *f)
{
char line[SOURCELINE_MAX];
size_t len;
while (read_source_line(f, line, &len, STRIP_COMMENTS)) {
if (num_sources == MAX_SOURCES) {
FAIL("Too many sources for bootstrap compiler.");
}
check_filename(line, "slul");
if (len == 14 && !memcmp(line, "interface.slul", 14)) {
is_library = true;
} else if (len == 15 && !memcmp(line, "interfaces.slul", 15)) {
error("Interface file should be called interface.slul "
"(remove the 's')");
} else if ((len>=15 && !memcmp(line+len-15, "/interface.slul", 15)) ||
(len>=16 && !memcmp(line+len-16, "/interfaces.slul", 16))) {
error("interface.slul is only supported in the root directory");
} else {
sources[num_sources++] = dupmemz(line, len);
}
}
}
static const char *next_word(const char *last_start, size_t *prev_len_out)
{
const char *s = last_start;
bool spaces = false;
assert(*s && *s != ' ' && *s != '\t');
while (*s && *s != ' ' && *s != '\t') s++;
*prev_len_out = (unsigned)(s - last_start);
/* Skip whitespace after */
while (*s == ' ' || *s == '\t') { s++; spaces = true; }
if (!*s) {
if (spaces) {
warning("Trailing whitespace");
}
return NULL;
}
return s;
}
static void check_modname(const char *name, size_t len)
{
if (len > 50) {
error_len("Module name of dependency too long", name, len);
}
/* TODO */
/* XXX require that the first letter is lowercase? or all letters? */
}
static void check_version(const char *version, size_t len)
{
if (len > 50) {
error_len("Version of dependency too long", version, len);
}
/* TODO */
}
static void add_dependency(const char *apihash,
const char *modname, size_t modname_len,
const char *apiversion, size_t apiversion_len)
{
struct DependencyInfo *dep;
assert(modname != NULL);
check_modname(modname, modname_len);
if (apiversion) {
assert(apihash != NULL);
check_version(apiversion, apiversion_len);
}
dep = (struct DependencyInfo *)tree_insert_str(&dependencies,
modname, modname_len, NULL, sizeof(struct DependencyInfo));
NO_NULL(dep);
dep->next = dependencies_list;
dependencies_list = dep;
if (dep->node.is_new) {
dep->use_latest_api = false;
dep->apiversions = NULL;
dep->apiversions_list = NULL;
} else if (dep->use_latest_api && !apihash) {
error("Duplicate module dependency");
} else if ((dep->apiversions && !apihash) ||
(!dep->apiversions && apihash)) {
/* This is only a warning, in order to allow adding a unversioned
dependency during development. */
warning("Mixing dependencies of the same module "
"with and without API hashes.");
}
if (!apihash) {
dep->use_latest_api = true;
} else {
unsigned char binhash[32]; /* copied by tree_insert/create_node */
struct DepApiVersion *ver;
if (!unbase64url(apihash, 43, binhash, 32)) {
error("Invalid encoding of API hash (must be Base64url)");
}
ver = (struct DepApiVersion *)tree_insert_str(&dep->apiversions,
(const char*)binhash, 32,
NULL, sizeof(struct DepApiVersion));
NO_NULL(ver);
if (!ver->node.is_new) {
error("Duplicate API version");
}
ver->apiversion = apiversion ?
dupmemz(apiversion, apiversion_len) : NULL;
ver->apiversion_len = apiversion_len;
ver->next = dep->apiversions_list;
dep->apiversions_list = ver;
}
}
static void parse_dependency_line(const char *line)
{
const char *word1, *word2;
const char *apihash, *modname, *apiversion;
size_t len1;
size_t modname_len, apiversion_len;
if (!line[0]) {
return; /* Empty line */
} else if (line[0] == ' ' || line[0] == '\t') {
error("Leading whitespace in dependencies file");
}
word1 = line;
word2 = next_word(word1, &len1);
assert(len1 > 0);
if (word2) {
const char *junk;
/* Full line with <api-hash> <module-name> [<api-version>] */
apihash = word1;
if (len1 != 43) {
error_len("Invalid length of API hash of dependency, "
"should be 43 characters (256 bits)",
apihash, len1);
}
modname = word2;
apiversion = next_word(word2, &modname_len);
if (apiversion) {
junk = next_word(apiversion, &apiversion_len);
if (junk != NULL) {
error_str("Unexpected stuff at end of dependency line", junk);
}
} else {
apiversion_len = 0;
}
} else {
/* Short line with just a module name.
This is for prototyping and internal submodules only. */
modname = word1;
modname_len = len1;
apihash = NULL;
apiversion = NULL;
apiversion_len = 0;
}
add_dependency(apihash,
modname, modname_len,
apiversion, apiversion_len);
}
void parse_dependencies_list(FILE *f)
{
char line[SOURCELINE_MAX];
size_t len;
while (read_source_line(f, line, &len, STRIP_COMMENTS)) {
parse_dependency_line(line);
}
}
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