68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* String functions
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*
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* Copyright (c) 2020 AKASHI Takahiro, Linaro Limited
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*/
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#include <common.h>
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#include <charset.h>
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#include <efi_loader.h>
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#include <malloc.h>
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/**
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* efi_create_indexed_name - create a string name with an index
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* @buffer: Buffer
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* @name: Name string
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* @index: Index
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*
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* Create a utf-16 string with @name, appending @index.
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* For example, u"Capsule0001"
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*
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* The caller must ensure that the buffer has enough space for the resulting
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* string including the trailing L'\0'.
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*
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* Return: A pointer to the next position after the created string
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* in @buffer, or NULL otherwise
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*/
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u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
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unsigned int index)
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{
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u16 *p = buffer;
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char index_buf[5];
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size_t size;
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size = (utf8_utf16_strlen(name) * sizeof(u16) +
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sizeof(index_buf) * sizeof(u16));
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if (buffer_size < size)
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return NULL;
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utf8_utf16_strcpy(&p, name);
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snprintf(index_buf, sizeof(index_buf), "%04X", index);
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utf8_utf16_strcpy(&p, index_buf);
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return p;
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}
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/**
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* efi_convert_string - Convert an ASCII or UTF-8 string to UTF-16
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* @str: String to be converted
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*
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* Return: Converted string in UTF-16 format. The caller is responsible for
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* freeing this string when it is no longer needed.
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*/
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efi_string_t efi_convert_string(const char *str)
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{
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efi_string_t str_16, tmp;
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size_t sz_16;
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sz_16 = utf8_utf16_strlen(str);
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str_16 = calloc(sz_16 + 1, sizeof(u16));
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if (!str_16)
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return NULL;
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tmp = str_16;
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utf8_utf16_strcpy(&tmp, str);
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return str_16;
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}
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