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#include "common.h"
struct TargetList *target_list_new(const size_t len) {
struct TargetList *list = calloc(1, sizeof(struct TargetList));
if (!list) {
fprintf(stderr, "unable to allocate memory for list\n");
return NULL;
}
list->count_alloc = len;
list->targets = calloc(list->count_alloc + 1, sizeof(struct Target *));
if (!list->targets) {
fprintf(stderr, "unable to allocate memory for list->targets\n");
safe_free(list);
return NULL;
}
return list;
}
// Append a target list to an existing target list
int target_list_append(struct TargetList **dest, const struct TargetList *src) {
for (size_t i = 0; i < src->count_used; i++) {
struct Target *t = src->targets[i];
if (!t) {
return -1;
}
target_list_add((*dest), t);
}
return 0;
}
// Add target to list
int target_list_add(struct TargetList *list, struct Target *t) {
if (list->count_used >= list->count_alloc) {
fprintf(stderr, "%p: growing list from %zu records ", list, list->count_alloc);
list->count_alloc *= 2;
fprintf(stderr, "to %zu records\n", list->count_alloc);
struct Target **tmp = realloc(list->targets, list->count_alloc * sizeof(*list->targets));
if (!tmp) {
fprintf(stderr, "unable to reallocate memory for target list\n");
return -1;
}
list->targets = tmp;
}
list->targets[list->count_used] = t;
list->count_used++;
return 0;
}
void target_list_free(struct TargetList **list) {
if (!list || !*list) {
return;
}
for (size_t i = 0; i < (*list)->count_used; i++) {
target_free(&(*list)->targets[i]);
}
safe_free((*list)->targets);
safe_free(*list);
}
struct Target *target_list_get(const struct TargetList *list, const char *id) {
for (size_t i = 0; i < list->count_used; i++) {
struct Target *t = list->targets[i];
if (strcmp(t->id, id) == 0) {
return t;
}
}
return NULL;
}
struct TargetList *target_list_from_file(const char *filename) {
struct TargetList *list = target_list_new(TARGETLIST_INITIAL_COUNT);
if (!list) {
return NULL;
}
FILE *fp = fopen(filename, "r");
if (!fp) {
target_list_free(&list);
return NULL;
}
char *line = calloc(BUFSIZ + 1, sizeof(char));
if (!line) {
target_list_free(&list);
return NULL;
}
size_t buffer_size = BUFSIZ;
struct Target *t = NULL;
size_t line_no = 0;
while (getline(&line, &buffer_size, fp) > 0) {
// Skip comments
if (line[0] == '#') {
line_no++;
continue;
}
char *deps_delim = strchr(line, ':');
const char *deps = deps_delim ? deps_delim + 1 : NULL;
char *var_delim = strchr(line, '=');
const int is_var = isalpha(line[0]) && var_delim != NULL;
const int is_target = isalnum(line[0]) && deps_delim != NULL;
const int is_script = isspace(line[0]);
const int is_include = strncmp(line, "include", strlen("include")) == 0;
if (t && is_script) {
if (!t->script) {
t->script = calloc(BUFSIZ + 1, sizeof(char));
if (!t->script) {
fprintf(stderr, "unable to allocate memory for script data\n");
safe_free(line);
target_list_free(&list);
return NULL;
}
t->info.filename = strdup(filename);
if (!t->info.filename) {
fprintf(stderr, "unable to allocate memory for info.filename\n");
safe_free(line);
target_list_free(&list);
return NULL;
}
}
char *buf_start = line;
for (size_t i = 0; i < strlen(line); i++) {
if (line[i] == '\t' && i < 4) {
continue;
}
if (isspace(line[i]) && i < 4) {
continue;
}
buf_start = &line[i];
break;
}
strcat(t->script, buf_start);
} else if (is_target) {
t = target_new();
if (!t) {
fprintf(stderr, "unable to allocate memory for new target\n");
safe_free(line);
target_free(&t);
target_list_free(&list);
return NULL;
}
t->info.line_no = line_no;
t->info.line = strdup(line);
if (!deps_delim) {
fprintf(stderr, "%s: line %lu: invalid target definition: %s\n", filename, t->info.line_no, line);
fprintf(stderr, ">>> %s\n", t->info.line);
safe_free(line);
target_free(&t);
target_list_free(&list);
return NULL;
}
*deps_delim = '\0';
t->id = strdup(line);
if (deps) {
t->_tmp_deps = strdup(deps);
if (!t->_tmp_deps) {
fprintf(stderr, "unable to allocate memory for temporary dependency data\n");
safe_free(line);
target_free(&t);
target_list_free(&list);
return NULL;
}
if (t->_tmp_deps[strlen(t->_tmp_deps) ? strlen(t->_tmp_deps) - 1 : 0] == '\n') {
t->_tmp_deps[strlen(t->_tmp_deps) ? strlen(t->_tmp_deps) - 1 : 0] = '\0';
}
}
target_list_add(list, t);
} else if (is_var) {
printf("variable detected\n");
size_t num_split = 0;
char **pair = split(line, "=", 1, &num_split);
if (num_split < 2) {
fprintf(stderr, "%s: line: %lu: invalid variable definition: %s\n", filename, line_no, line);
fprintf(stderr, ">>> %s\n", line);
safe_free(line);
target_free(&t);
target_list_free(&list);
return NULL;
}
safe_free_array(pair, num_split);
} else if (is_include) {
size_t num_split = 0;
char **pair = split(line, " ", 1, &num_split);
if (!pair) {
fprintf(stderr, "%s: line: %lu: invalid include definition: %s\n", filename, line_no, line);
fprintf(stderr, ">>> %s\n", line);
safe_free(line);
target_free(&t);
target_list_free(&list);
return NULL;
}
if (pair[1][strlen(pair[1]) ? strlen(pair[1]) - 1 : 0] == '\n') {
pair[1][strlen(pair[1]) ? strlen(pair[1]) - 1 : 0] = '\0';
}
printf("Including file: %s\n", pair[1]);
struct TargetList *included_targets = target_list_from_file(pair[1]);
if (included_targets) {
if (target_list_append(&list, included_targets)) {
fprintf(stderr, "unable to append to target list %p\n", list);
safe_free(line);
target_list_free(&list);
return NULL;
}
for (size_t i = 0; i < list->count_used; i++) {
included_targets->targets[i] = NULL;
}
free(included_targets->targets);
free(included_targets);
} else {
fprintf(stderr, "%s: line %lu: failed to include file: %s\n", filename, line_no, pair[1]);
safe_free(line);
safe_free_array(pair, num_split);
target_free(&t);
target_list_free(&list);
return NULL;
}
safe_free_array(pair, num_split);
}
line_no++;
}
// Add dependencies
for (size_t i = 0; i < list->count_used; i++) {
if (!list->targets[i]->_tmp_deps || !strlen(list->targets[i]->_tmp_deps)) {
continue;
}
char *_tmp_deps_orig = list->targets[i]->_tmp_deps;
list->targets[i]->dependencies = target_list_new(TARGETLIST_INITIAL_COUNT);
const char *token = NULL;
while ((token = strsep(&list->targets[i]->_tmp_deps, " ")) != NULL) {
char *data = strdup(token);
if (!strlen(data)) {
safe_free(data);
continue;
}
if (data[strlen(data) ? strlen(data) - 1 : 0] == '\n') {
data[strlen(data) ? strlen(data) - 1 : 0] = '\0';
}
const int target_exists = target_list_get(list, data) != NULL;
if (!target_exists) {
fprintf(stderr, "%s: line %lu: target not found: %s\n", filename, line_no, data);
fprintf(stderr, ">>> %s\n", list->targets[i]->info.line);
safe_free(data);
safe_free(line);
target_list_free(&list);
return NULL;
}
for (size_t j = 0; j < list->count_used; j++) {
if (strcmp(list->targets[j]->id, data) == 0) {
if (list->targets[i]->id == list->targets[j]->id) {
fprintf(stderr, "%s: line %lu: target '%s' cannot target itself (circular dependency)\n", filename, list->targets[i]->info.line_no + 1, list->targets[i]->id);
fprintf(stderr, ">>> %s\n", list->targets[i]->info.line);
target_free(&t);
target_list_free(&list);
return NULL;
}
target_list_add(list->targets[i]->dependencies, list->targets[j]);
}
}
safe_free(data);
}
list->targets[i]->_tmp_deps = _tmp_deps_orig;
}
safe_free(line);
fclose(fp);
return list;
}
void target_list_show(const struct TargetList *list) {
for (size_t i = 0; i < list->count_used; i++) {
const struct Target *t = list->targets[i];
printf("TARGET: %s\n", t->id);
printf("DEPENDENCIES: ");
if (t->dependencies && t->dependencies->count_used) {
printf("\n");
for (size_t j = 0; j < t->dependencies->count_used; j++) {
printf(" - %s\n", t->dependencies->targets[j]->id);
}
} else {
printf("N/A\n");
}
printf("SCRIPT: ");
if (t->script && strlen(t->script)) {
printf("\n%s\n", t->script);
} else {
printf("N/A\n");
}
printf("\n");
}
}
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