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#include <errno.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <lyn/lyn.h>
#include <lyn/parser.h>
#include <lyn/debug.h>
struct lyn lyn_create()
{
return (struct lyn){};
}
int lyn_eval_str(struct lyn *lyn, const char *name, const char *str)
{
struct parser *p = create_parser();
if (!p)
return -1;
parse(p, name, str);
struct ast *ast = p->tree;
bool failed = p->failed;
destroy_parser(p);
if (!failed) {
ast_dump_list(0, ast);
}
return failed;
}
/**
* Read whole file into a buffer and return pointer to buffer.
* Possibly kind of silly to have both \p file and \p f.
* Apparently there's no standardized way to get the file name of a
* file pointer.
*
* @param file Name of file to read.
* @param f File pointer.
* @return Pointer to buffer with file contents.
*/
static char *read_file(const char *file, FILE *f)
{
fseek(f, 0, SEEK_END);
/** @todo check how well standardized this actually is */
long s = ftell(f);
if (s == LONG_MAX) {
error("%s might be a directory", file);
return NULL;
}
fseek(f, 0, SEEK_SET);
char *buf = malloc((size_t)(s + 1));
if (!buf)
return NULL;
fread(buf, (size_t)(s + 1), 1, f);
/* remember terminating null */
buf[s] = 0;
return buf;
}
int lyn_eval_file(struct lyn *lyn, const char *fname)
{
FILE *f = fopen(fname, "rb");
if (!f) {
error("failed opening %s: %s\n", fname, strerror(errno));
return -1;
}
char *buf = read_file(fname, f);
fclose(f);
if (!buf)
return -1;
int ret = lyn_eval_str(lyn, fname, buf);
free(buf);
return ret;
}
void lyn_destroy(struct lyn *lyn)
{
}
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