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Some fixes to string. Added fprintf and String.printf. Updated boolerr example.

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This commit is contained in:
Christoffer Lerno
2022-07-26 13:44:08 +02:00
parent da4df9d626
commit 7065c28a08
4 changed files with 65 additions and 30 deletions
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44
resources/examples/contextfree/boolerr.c3
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@@ -3,20 +3,26 @@ import libc;
import std::io;
struct Doc { Head *head; }
struct Head { char[]* title; }
struct Head { String* title; }
struct Summary
{
char[]* title;
String* title;
bool ok;
}
fn void Summary.print(Summary *s, CFile out)
private struct StringData
{
// We don't have a native fprintf in C3 yet, so use libc,
// which is not all that nice for the strings but...
char[] title = s.title ? *s.title : "missing";
libc::fprintf(out, "Summary({ .title = %.*s, .ok = %s})", (int)title.len, title.ptr, s.ok ? "true" : "false");
Allocator allocator;
usize len;
usize capacity;
char[*] chars;
}
fn void Summary.print(Summary *s, File out)
{
char[] title = s.title ? s.title.str() : "missing";
io::fprintf(out, "Summary({ .title = %s, .ok = %s})", title, s.ok);
}
fn bool contains(char[] haystack, char[] needle)
@@ -36,7 +42,7 @@ fn bool contains(char[] haystack, char[] needle)
return false;
}
macro dupe(value)
macro @dupe(value)
{
$typeof(&value) temp = mem::alloc_checked($sizeof(value))?;
*temp = value;
@@ -52,13 +58,11 @@ fn Doc! readDoc(char[] url)
{
if (contains(url, "fail")) return ReadError.BAD_READ!;
if (contains(url, "head-missing")) return { .head = null };
if (contains(url, "title-missing")) return { dupe(Head { .title = null })? };
if (contains(url, "title-empty")) return { dupe(Head { .title = dupe((char[])"")? })? };
// Not particularly elegant due to missing string functions.
int len = libc::snprintf(null, 0, "Title of %.*s", (int)url.len, url.ptr);
char* str = mem::alloc_checked(len + 1)?;
libc::snprintf(str, len + 1, "Title of %.*s", (int)url.len, url.ptr);
return { dupe(Head { .title = dupe(str[..len - 1])? })? };
if (contains(url, "title-missing")) return { @dupe(Head { .title = null }) };
if (contains(url, "title-empty")) return { @dupe(Head { .title = @dupe((String)null) }) };
String str;
str.printf("Title of %s", url);
return { @dupe(Head { .title = @dupe(str) }) };
}
fn Summary buildSummary(Doc doc)
@@ -93,9 +97,9 @@ fault TitleResult
fn bool! isTitleNonEmpty(Doc doc)
{
if (!doc.head) return TitleResult.TITLE_MISSING!;
char[]* head = doc.head.title;
String* head = doc.head.title;
if (!head) return TitleResult.TITLE_MISSING!;
return (*head).len > 0;
return head.len() > 0;
}
@@ -123,13 +127,11 @@ fn void main()
io::printf(`Checking "https://%s/":` "\n", url);
Summary summary = readAndBuildSummary(url);
io::printf(" Summary: ");
summary.print(libc::stdout());
summary.print(io::stdout());
io::println("");
char[] title_sure = summary.title ? *summary.title : "";
char[] title_sure = summary.title ? summary.title.str() : "";
io::printf(" Title: %s\n", title_sure);
bool! has_title = readWhetherTitleNonEmpty(url);
// This looks a bit less than elegant, but as you see it's mostly due to having to
// use printf here.
io::printf(" Has title: %s vs %s\n", bool_to_string(has_title) ?? catch(has_title).nameof, has_title ?? false);
};
allocator.reset();