diff options
Diffstat (limited to 'epan/strutil.c')
-rw-r--r-- | epan/strutil.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/epan/strutil.c b/epan/strutil.c index 1ac18f9559..1572717dc4 100644 --- a/epan/strutil.c +++ b/epan/strutil.c @@ -33,6 +33,11 @@ #include "strutil.h" #include "emem.h" +#ifdef _WIN32 +#include <windows.h> +#include <tchar.h> +#include <wchar.h> +#endif /* * Given a pointer into a data buffer, and to the end of the buffer, @@ -652,3 +657,89 @@ g_strlcat(gchar *dst, gchar *src, gsize size) } #endif +#ifdef _WIN32 + +/* + * XXX - Should we use g_utf8_to_utf16() and g_utf16_to_utf8() + * instead? The goal of the functions below was to provide simple + * wrappers for UTF-8 <-> UTF-16 conversion without making the + * caller worry about freeing up memory afterward. + */ + +/* Convert from UTF-8 to UTF-16. */ +wchar_t * utf_8to16(const char *utf8str) { + static wchar_t *utf16buf[3]; + static int utf16buf_len[3]; + static int idx; + + if (utf8str == NULL) + return NULL; + + idx = (idx + 1) % 3; + + /* + * Allocate the buffer if it's not already allocated. + */ + if (utf16buf[idx] == NULL) { + utf16buf_len[idx] = INITIAL_FMTBUF_SIZE; + utf16buf[idx] = g_malloc(utf16buf_len[idx] * sizeof(wchar_t)); + } + + while (MultiByteToWideChar(CP_UTF8, 0, utf8str, + -1, NULL, 0) >= utf16buf_len[idx]) { + /* + * Double the buffer's size if it's not big enough. + * The size of the buffer starts at 128, so doubling its size + * adds at least another 128 bytes, which is more than enough + * for one more character plus a terminating '\0'. + */ + utf16buf_len[idx] *= 2; + utf16buf[idx] = g_realloc(utf16buf[idx], utf16buf_len[idx]); + } + + if (MultiByteToWideChar(CP_UTF8, 0, utf8str, + -1, utf16buf[idx], utf16buf_len[idx]) == 0) + return NULL; + + return utf16buf[idx]; +} + +/* Convert from UTF-16 to UTF-8. */ +gchar * utf_16to8(const wchar_t *utf16str) { + static gchar *utf8buf[3]; + static int utf8buf_len[3]; + static int idx; + + if (utf16str == NULL) + return NULL; + + idx = (idx + 1) % 3; + + /* + * Allocate the buffer if it's not already allocated. + */ + if (utf8buf[idx] == NULL) { + utf8buf_len[idx] = INITIAL_FMTBUF_SIZE; + utf8buf[idx] = g_malloc(utf8buf_len[idx]); + } + + while (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1, + NULL, 0, NULL, NULL) >= utf8buf_len[idx]) { + /* + * Double the buffer's size if it's not big enough. + * The size of the buffer starts at 128, so doubling its size + * adds at least another 128 bytes, which is more than enough + * for one more character plus a terminating '\0'. + */ + utf8buf_len[idx] *= 2; + utf8buf[idx] = g_realloc(utf8buf[idx], utf8buf_len[idx]); + } + + if (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1, + utf8buf[idx], utf8buf_len[idx], NULL, NULL) == 0) + return NULL; + + return utf8buf[idx]; +} + +#endif
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