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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <alloc.h>
#include <dynarr.h>
#include <errors.h>
#include <macros.h>
#include <mbstring.h>
#include <rune.h>
#include <unicode/string.h>
#define TESTFILE "gnext.in"
static bool test(const char8_t *, size_t, int);
static int hexdigits(rune);
int
main(int, char **argv)
{
int rv;
size_t n;
ssize_t nr;
char *line;
FILE *fp;
rv = EXIT_SUCCESS;
line = nullptr;
mlib_setprogname(argv[0]);
if ((fp = fopen(TESTFILE, "r")) == nullptr)
err("fopen: %s:", TESTFILE);
for (int id = 1; (nr = getline(&line, &n, fp)) > 0; id++) {
if (line[nr - 1] == '\n')
line[--nr] = '\0';
if (!test(line, (size_t)nr, id))
rv = EXIT_FAILURE;
}
if (ferror(fp))
err("getline: %s:", TESTFILE);
free(line);
fclose(fp);
return rv;
}
bool
test(const char8_t *line, size_t n, int id)
{
size_t total = 0;
const char8_t *line2 = line;
typedef dynarr(char8_t) graph;
dynarr(graph) graphs = {};
do {
rune op, ch;
u8next(&op, &line2, &n);
sscanf(line2, "%" SCNxRUNE, &ch);
int off = hexdigits(ch);
off = MAX(4, off);
line2 += off, n -= off;
char8_t buf[U8_LEN_MAX] = {};
int w = rtou8(buf, sizeof(buf), ch);
total += w;
if (op == U'÷')
DAPUSH(&graphs, (graph){});
DAEXTEND(&graphs.buf[graphs.len - 1], buf, w);
} while (n > 0);
size_t off = 0;
char8_t *buf = bufalloc(nullptr, 1, total);
da_foreach (&graphs, g) {
memcpy(buf + off, g->buf, g->len);
off += g->len;
}
/* Assert the grapheme count is correct */
size_t graphs_got = u8gcnt(buf, total);
if (graphs_got != graphs.len) {
warn("case %d: expected %zu grapheme(s) but got %zu: ‘%s’", id,
graphs.len, graphs_got, line);
return false;
}
/* Assert the individual graphemes are correct */
struct u8view g;
const char8_t *buf_cpy = buf;
for (size_t i = 0; u8gnext(&g, &buf_cpy, &total); i++) {
graph g2 = graphs.buf[i];
if (!u8eq(g.p, g.len, g2.buf, g2.len)) {
warn("case %d: expected grapheme ‘%.*s’ but got ‘%.*s’", id,
(int)g2.len, g2.buf, (int)g.len, g.p);
return false;
}
}
da_foreach (&graphs, wd)
free(wd->buf);
free(graphs.buf);
free(buf);
return true;
}
int
hexdigits(rune ch)
{
int n = 0;
do {
ch /= 16;
n++;
} while (ch != 0);
return n;
}
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