From f8217d240d598f39f70047f7a623dd46312542c6 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 4 Dec 2021 16:01:12 -0800
Subject: Initial commit.
---
cstring/CMakeLists.txt | 11 ++++++++
cstring/include/cstring.h | 64 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 75 insertions(+)
create mode 100644 cstring/CMakeLists.txt
create mode 100644 cstring/include/cstring.h
(limited to 'cstring')
diff --git a/cstring/CMakeLists.txt b/cstring/CMakeLists.txt
new file mode 100644
index 0000000..67fb366
--- /dev/null
+++ b/cstring/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(cstring)
+
+add_library(cstring INTERFACE)
+
+target_include_directories(cstring INTERFACE
+ include)
+
+target_link_libraries(cstring INTERFACE
+ -lbsd)
diff --git a/cstring/include/cstring.h b/cstring/include/cstring.h
new file mode 100644
index 0000000..644f1e1
--- /dev/null
+++ b/cstring/include/cstring.h
@@ -0,0 +1,64 @@
+/// Fixed-size strings with value semantics.
+#pragma once
+
+#include <assert.h>
+#include <bsd/string.h>
+
+/// A fixed-size string.
+/// The string is null-terminated so that it can be used with the usual C APIs.
+#define DEF_STRING(STRING, SIZE) \
+ typedef struct STRING { \
+ int length; \
+ char str[SIZE]; \
+ } STRING; \
+ \
+ static const size_t STRING##_size = SIZE; \
+ \
+ static inline const char* STRING##_cstring(const STRING* str) { \
+ return str->str; \
+ } \
+ \
+ static inline STRING STRING##_make(const char* cstr) { \
+ if (!cstr) { \
+ return (STRING){0}; \
+ } else { \
+ STRING str = (STRING){0}; \
+ str.length = strlcpy(str.str, cstr, SIZE); \
+ return str; \
+ } \
+ } \
+ \
+ static inline STRING STRING##_dirname(STRING path) { \
+ STRING str = path; \
+ for (int i = str.length - 1; i >= 0; --i) { \
+ if (str.str[i] == '/' || str.str[i] == '\\') { \
+ str.str[i] = 0; \
+ str.length = i; \
+ return str; \
+ } else { \
+ str.str[i] = 0; \
+ } \
+ } \
+ str = (STRING){0}; \
+ str.str[0] = '.'; \
+ str.length = 1; \
+ return str; \
+ } \
+ \
+ static inline STRING STRING##_concat(STRING a, STRING b) { \
+ assert(a.length + b.length + 1 < SIZE); \
+ STRING str = {0}; \
+ strlcpy(str.str, a.str, SIZE); \
+ strlcpy(str.str + a.length, b.str, SIZE); \
+ str.length = a.length + b.length; \
+ return str; \
+ } \
+ \
+ static inline STRING STRING##_concat_path(STRING a, STRING b) { \
+ return STRING##_concat(STRING##_concat(a, STRING##_make("/")), b); \
+ }
+
+DEF_STRING(sstring, 32) // Small.
+DEF_STRING(mstring, 256) // Medium.
+DEF_STRING(lstring, 1024) // Large.
+DEF_STRING(xlstring, 4096) // Extra large.
--
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