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2024-03-21lib/charset: Map Unicode code points to CP437 code points 1-31Janne Grunau
Code page 437 uses code points 1-31 for glyphs instead of control characters. Map the appropriate Unicode code points to this code points. Fixes rendering of grub2's menu as EFI application using the EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL on a console with bitmap fonts. Signed-off-by: Janne Grunau <j@jannau.net>
2024-02-12lib: charset: Fix and extend utf8_to_utf32_stream() documentationJanne Grunau
Clarify usage of buffer argument. Signed-off-by: Janne Grunau <j@jannau.net> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2023-01-13doc: fix description of u16_strcasecmp()Heinrich Schuchardt
Remove non-existent parameter 'n' from function description. Fixes: 7a9b366cd9b7 ("lib: add function u16_strcasecmp()") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2023-01-04lib: add function u16_strcasecmp()Heinrich Schuchardt
Provide a function for comparing UTF-16 strings in a case insensitive manner. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-05-28lib/charset: fix compile warningsMasahisa Kojima
This commit fixes the following compile warnings for the documentation. ./include/charset.h:276: warning: Function parameter or member 'size' not described in 'u16_strlcat' ./include/charset.h:276: warning: Excess function parameter 'count' description in 'u16_strlcat' Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-05-03lib/charset: add u16_strlcat() functionMasahisa Kojima
Provide u16 string version of strlcat(). Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-04-15lib: convert u16_strlen() into a macroHeinrich Schuchardt
The function u16_strlen() can be implemented as call to u16_strnlen(). Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2021-04-10efi_loader: documentation codepage_437[]Heinrich Schuchardt
Variables cannot be documented via kernel-doc. Avoid 'make htmldocs' build warning ./include/charset.h:19: warning: cannot understand function prototype: 'const u16 codepage_437[128]; ' Fixes: 70616a1ed8c7 ("efi_loader: move codepage 437 table") Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-03-07lib/charset: UTF-8 stream conversionHeinrich Schuchardt
Provide functions to convert an UTF-8 stream to code page 437 or UTF-32. Add unit tests. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-03-07efi_loader: carve out utf_to_cp()Heinrich Schuchardt
Carve out a function to translate a Unicode code point to an 8bit codepage. Provide a unit test for the new function. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-03-07efi_loader: move codepage 437 tableHeinrich Schuchardt
Move the Unicode to codepage 437 table to charset.c Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-10-30efi_loader: typo in function description of u16_strnlenHeinrich Schuchardt
%/u16_strlen/u16_strnlen()/ Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-05-09lib: charset: correct function descriptionsHeinrich Schuchardt
Change function descriptions to match kernel doc style. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-05-09charset: Add support for calculating bytes occupied by a u16 stringSughosh Ganu
The current code uses 'u16_strlen(x) + 1) * sizeof(u16)' in various places to calculate the number of bytes occupied by a u16 string. Let's introduce a wrapper around this. This wrapper is used on following patches Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-09-20lib: charset: add u16_str<n>cmp()AKASHI Takahiro
u16 version of strcmp(): u16_strncmp() works like u16_strcmp() but only at most n characters (in u16) are compared. This function will be used in my UEFI secure boot patch. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-07-16efi_loader: support unaligned u16 stringsHeinrich Schuchardt
Allow unaligned u16 strings as arguments to u16_strdup() and u16_strlen(). Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-05-12lib: charset: correct utf8_utf16_strnlen() descriptionHeinrich Schuchardt
Correct the description of utf8_utf16_strnlen() and utf8_utf16_strlen() to reflect that they return u16 count and not byte count. For these functions and utf16_utf8_strnlen() describe the handling of invalid code sequences. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-02-13lib: add u16_strcpy/strdup functionsAkashi, Takahiro
Add u16_strcpy() and u16_strdup(). The latter function will be used later in implementing efi HII database protocol. Signed-off-by: Akashi Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-09-23efi_loader: support Unicode text inputHeinrich Schuchardt
Up to now the EFI_TEXT_INPUT_PROTOCOL only supported ASCII characters. With the patch it can consume UTF-8 from the console. Currently only the serial console and the console can deliver UTF-8. Local consoles are restricted to ASCII. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-09-23lib: charset: upper/lower case conversionHeinrich Schuchardt
Provide functions for upper and lower case conversion. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-09-23lib: charset: remove obsolete functionsHeinrich Schuchardt
Remove functions: - utf8_to_utf16() - utf16_strcpy() - utf16_strdup() Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-09-23lib: charset: utility functions for UnicodeHeinrich Schuchardt
utf8_get() - get next UTF-8 code point from buffer utf8_put() - write UTF-8 code point to buffer utf8_utf16_strnlen() - length of a utf-8 string after conversion to utf-16 utf8_utf16_strncpy() - copy a utf-8 string to utf-16 utf16_get() - get next UTF-16 code point from buffer utf16_put() - write UTF-16 code point to buffer utf16_strnlen() - number of codes points in a utf-16 string utf16_utf8_strnlen() - length of a utf-16 string after conversion to utf-8 utf16_utf8_strncpy() - copy a utf-16 string to utf-8 Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-09-23efi_loader: rename utf16_strlen, utf16_strnlenHeinrich Schuchardt
The function names utf16_strlen() and utf16_strnlen() are misnomers. The functions do not count utf-16 characters but non-zero words. So let's rename them to u16_strlen and u16_strnlen(). In utf16_dup() avoid assignment in if clause. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-10SPDX: Convert a few files that were missed beforeTom Rini
As part of the main conversion a few files were missed. These files had additional whitespace after the '*' and before the SPDX tag and my previous regex was too strict. This time I did a grep for all SPDX tags and then filtered out anything that matched the correct styles. Fixes: 83d290c56fab ("SPDX: Convert all of our single license tags to Linux Kernel style") Reported-by: Heinrich Schuchardt <xypron.debian@gmx.de> Signed-off-by: Tom Rini <trini@konsulko.com>
2017-12-01efi_loader: new function utf8_to_utf16Heinrich Schuchardt
Provide a conversion function from utf8 to utf16. Add missing #include <linux/types.h> in include/charset.h. Remove superfluous #include <common.h> in lib/charset.c. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-10-10efi_loader: MAX_UTF8_PER_UTF16 = 3Heinrich Schuchardt
The constant MAX_UTF8_PER_UTF16 is used to calculate required memory when converting from UTF-16 to UTF-8. If this constant is too big we waste memory. A code point encoded by one UTF-16 symbol is converted to a maximum of three UTF-8 symbols, e.g. 0xffff could be encoded as 0xef 0xbf 0xbf. The first byte carries four bits, the second and third byte carry six bits each. A code point encoded by two UTF-16 symbols is converted to four UTF-8 symbols. So in this case we need a maximum of two UTF-8 symbols per UTF-16 symbol. As the overall maximum is three UTF-8 symobls per UTF-16 symbol we need MAX_UTF8_PER_UTF16 = 3. Fixes: 78178bb0c9d lib: add some utf16 handling helpers Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-12lib: add some utf16 handling helpersRob Clark
We'll eventually want these in a few places in efi_loader, and also vsprintf. Signed-off-by: Rob Clark <robdclark@gmail.com>
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