1 files changed, 180 insertions, 0 deletions
diff --git a/src/boot/efi/efi-string.h b/src/boot/efi/efi-string.h
new file mode 100644
index 0000000..9ac919f
--- /dev/null
+++ b/src/boot/efi/efi-string.h
@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "efi.h"
+#include "macro-fundamental.h"
+
+size_t strnlen8(const char *s, size_t n);
+size_t strnlen16(const char16_t *s, size_t n);
+
+static inline size_t strlen8(const char *s) {
+        return strnlen8(s, SIZE_MAX);
+}
+
+static inline size_t strlen16(const char16_t *s) {
+        return strnlen16(s, SIZE_MAX);
+}
+
+static inline size_t strsize8(const char *s) {
+        return s ? (strlen8(s) + 1) * sizeof(*s) : 0;
+}
+
+static inline size_t strsize16(const char16_t *s) {
+        return s ? (strlen16(s) + 1) * sizeof(*s) : 0;
+}
+
+void strtolower8(char *s);
+void strtolower16(char16_t *s);
+
+int strncmp8(const char *s1, const char *s2, size_t n);
+int strncmp16(const char16_t *s1, const char16_t *s2, size_t n);
+int strncasecmp8(const char *s1, const char *s2, size_t n);
+int strncasecmp16(const char16_t *s1, const char16_t *s2, size_t n);
+
+static inline int strcmp8(const char *s1, const char *s2) {
+        return strncmp8(s1, s2, SIZE_MAX);
+}
+
+static inline int strcmp16(const char16_t *s1, const char16_t *s2) {
+        return strncmp16(s1, s2, SIZE_MAX);
+}
+
+static inline int strcasecmp8(const char *s1, const char *s2) {
+        return strncasecmp8(s1, s2, SIZE_MAX);
+}
+
+static inline int strcasecmp16(const char16_t *s1, const char16_t *s2) {
+        return strncasecmp16(s1, s2, SIZE_MAX);
+}
+
+static inline bool strneq8(const char *s1, const char *s2, size_t n) {
+        return strncmp8(s1, s2, n) == 0;
+}
+
+static inline bool strneq16(const char16_t *s1, const char16_t *s2, size_t n) {
+        return strncmp16(s1, s2, n) == 0;
+}
+
+static inline bool streq8(const char *s1, const char *s2) {
+        return strcmp8(s1, s2) == 0;
+}
+
+static inline bool streq16(const char16_t *s1, const char16_t *s2) {
+        return strcmp16(s1, s2) == 0;
+}
+
+static inline int strncaseeq8(const char *s1, const char *s2, size_t n) {
+        return strncasecmp8(s1, s2, n) == 0;
+}
+
+static inline int strncaseeq16(const char16_t *s1, const char16_t *s2, size_t n) {
+        return strncasecmp16(s1, s2, n) == 0;
+}
+
+static inline bool strcaseeq8(const char *s1, const char *s2) {
+        return strcasecmp8(s1, s2) == 0;
+}
+
+static inline bool strcaseeq16(const char16_t *s1, const char16_t *s2) {
+        return strcasecmp16(s1, s2) == 0;
+}
+
+char *strcpy8(char * restrict dest, const char * restrict src);
+char16_t *strcpy16(char16_t * restrict dest, const char16_t * restrict src);
+
+char *strchr8(const char *s, char c);
+char16_t *strchr16(const char16_t *s, char16_t c);
+
+char *xstrndup8(const char *s, size_t n);
+char16_t *xstrndup16(const char16_t *s, size_t n);
+
+static inline char *xstrdup8(const char *s) {
+        return xstrndup8(s, SIZE_MAX);
+}
+
+static inline char16_t *xstrdup16(const char16_t *s) {
+        return xstrndup16(s, SIZE_MAX);
+}
+
+char16_t *xstrn8_to_16(const char *str8, size_t n);
+static inline char16_t *xstr8_to_16(const char *str8) {
+        return xstrn8_to_16(str8, strlen8(str8));
+}
+
+char *startswith8(const char *s, const char *prefix);
+
+bool efi_fnmatch(const char16_t *pattern, const char16_t *haystack);
+
+bool parse_number8(const char *s, uint64_t *ret_u, const char **ret_tail);
+bool parse_number16(const char16_t *s, uint64_t *ret_u, const char16_t **ret_tail);
+
+bool parse_boolean(const char *v, bool *ret);
+
+char *line_get_key_value(char *s, const char *sep, size_t *pos, char **ret_key, char **ret_value);
+
+char16_t *hexdump(const void *data, size_t size);
+
+#ifdef __clang__
+#  define _gnu_printf_(a, b) _printf_(a, b)
+#else
+#  define _gnu_printf_(a, b) __attribute__((format(gnu_printf, a, b)))
+#endif
+
+_gnu_printf_(2, 3) void printf_status(EFI_STATUS status, const char *format, ...);
+_gnu_printf_(2, 0) void vprintf_status(EFI_STATUS status, const char *format, va_list ap);
+_gnu_printf_(2, 3) _warn_unused_result_ char16_t *xasprintf_status(EFI_STATUS status, const char *format, ...);
+_gnu_printf_(2, 0) _warn_unused_result_ char16_t *xvasprintf_status(EFI_STATUS status, const char *format, va_list ap);
+
+#if SD_BOOT
+#  define printf(...) printf_status(EFI_SUCCESS, __VA_ARGS__)
+#  define xasprintf(...) xasprintf_status(EFI_SUCCESS, __VA_ARGS__)
+
+/* inttypes.h is provided by libc instead of the compiler and is not supposed to be used in freestanding
+ * environments. We could use clang __*_FMT*__ constants for this, bug gcc does not have them. :( */
+
+#  if defined(__ILP32__) || defined(__arm__) || defined(__i386__)
+#    define PRI64_PREFIX "ll"
+#  elif defined(__LP64__)
+#    define PRI64_PREFIX "l"
+#  elif defined(__LLP64__) || (__SIZEOF_LONG__ == 4 && __SIZEOF_POINTER__ == 8)
+#    define PRI64_PREFIX "ll"
+#  else
+#    error Unknown 64-bit data model
+#  endif
+
+#  define PRIi32 "i"
+#  define PRIu32 "u"
+#  define PRIx32 "x"
+#  define PRIX32 "X"
+#  define PRIiPTR "zi"
+#  define PRIuPTR "zu"
+#  define PRIxPTR "zx"
+#  define PRIXPTR "zX"
+#  define PRIi64 PRI64_PREFIX "i"
+#  define PRIu64 PRI64_PREFIX "u"
+#  define PRIx64 PRI64_PREFIX "x"
+#  define PRIX64 PRI64_PREFIX "X"
+
+/* The compiler normally has knowledge about standard functions such as memcmp, but this is not the case when
+ * compiling with -ffreestanding. By referring to builtins, the compiler can check arguments and do
+ * optimizations again. Note that we still need to provide implementations as the compiler is free to not
+ * inline its own implementation and instead issue a library call. */
+#  define memchr __builtin_memchr
+#  define memcmp __builtin_memcmp
+#  define memcpy __builtin_memcpy
+#  define memset __builtin_memset
+
+static inline void *mempcpy(void * restrict dest, const void * restrict src, size_t n) {
+        if (!dest || !src || n == 0)
+                return dest;
+        memcpy(dest, src, n);
+        return (uint8_t *) dest + n;
+}
+
+#else
+/* For unit testing. */
+void *efi_memchr(const void *p, int c, size_t n);
+int efi_memcmp(const void *p1, const void *p2, size_t n);
+void *efi_memcpy(void * restrict dest, const void * restrict src, size_t n);
+void *efi_memset(void *p, int c, size_t n);
+#endif