diff options
Diffstat (limited to 'source/blender/blenlib')
-rw-r--r-- | source/blender/blenlib/BLI_string_utf8.h | 5 | ||||
-rw-r--r-- | source/blender/blenlib/intern/string_utf8.c | 50 |
2 files changed, 55 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_string_utf8.h b/source/blender/blenlib/BLI_string_utf8.h index 70586b671b4..0cdd6e94610 100644 --- a/source/blender/blenlib/BLI_string_utf8.h +++ b/source/blender/blenlib/BLI_string_utf8.h @@ -89,6 +89,11 @@ size_t BLI_str_partition_ex_utf8(const char *str, const char **suf, const bool from_right) ATTR_NONNULL(1, 3, 4, 5); +int BLI_str_utf8_offset_to_index(const char *str, int offset); +int BLI_str_utf8_offset_from_index(const char *str, int index); +int BLI_str_utf8_offset_to_column(const char *str, int offset); +int BLI_str_utf8_offset_from_column(const char *str, int column); + #define BLI_UTF8_MAX 6 /* mem */ #define BLI_UTF8_WIDTH_MAX 2 /* columns */ #define BLI_UTF8_ERR ((unsigned int)-1) diff --git a/source/blender/blenlib/intern/string_utf8.c b/source/blender/blenlib/intern/string_utf8.c index 01412416854..22c23727d76 100644 --- a/source/blender/blenlib/intern/string_utf8.c +++ b/source/blender/blenlib/intern/string_utf8.c @@ -868,3 +868,53 @@ size_t BLI_str_partition_ex_utf8(const char *str, *suf = *sep = NULL; return str_len; } + +/* -------------------------------------------------------------------- */ +/** \name Offset Conversion in Strings + * \{ */ + +int BLI_str_utf8_offset_to_index(const char *str, int offset) +{ + int index = 0, pos = 0; + while (pos != offset) { + pos += BLI_str_utf8_size(str + pos); + index++; + } + return index; +} + +int BLI_str_utf8_offset_from_index(const char *str, int index) +{ + int offset = 0, pos = 0; + while (pos != index) { + offset += BLI_str_utf8_size(str + offset); + pos++; + } + return offset; +} + +int BLI_str_utf8_offset_to_column(const char *str, int offset) +{ + int column = 0, pos = 0; + while (pos < offset) { + column += BLI_str_utf8_char_width_safe(str + pos); + pos += BLI_str_utf8_size_safe(str + pos); + } + return column; +} + +int BLI_str_utf8_offset_from_column(const char *str, int column) +{ + int offset = 0, pos = 0, col; + while (*(str + offset) && pos < column) { + col = BLI_str_utf8_char_width_safe(str + offset); + if (pos + col > column) { + break; + } + offset += BLI_str_utf8_size_safe(str + offset); + pos += col; + } + return offset; +} + +/** \} */ |