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authorPatrik Nyblom <[email protected]>2012-08-20 17:52:49 +0200
committerPatrik Nyblom <[email protected]>2012-08-20 17:52:49 +0200
commita49b1a844febb2740c530895b32c0bb0ae7d5aa0 (patch)
tree6e005b76b80ef0c8f629f291986087f51cbd5aff /erts/etc/common/erlexec.c
parent4e8f6f2e2cdec0e94f5b4e1a1a878190e4d01704 (diff)
parent0c387e88d5a6dc97466ec33088aa9798eeb1d16d (diff)
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Merge branch 'pan/unicode_home/OTP-10160' into maint
* pan/unicode_home/OTP-10160: Teach release_handler_SUITE about file:native_name_encoding/0 Add documetation about Unicode in environment Make get/putenv and erlexec understand Unicode
Diffstat (limited to 'erts/etc/common/erlexec.c')
-rw-r--r--erts/etc/common/erlexec.c171
1 files changed, 164 insertions, 7 deletions
diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c
index 790b0ed400..cba7429fab 100644
--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -245,7 +245,9 @@ static char* config_script = NULL; /* used by option -start_erl and -config */
static HANDLE this_module_handle;
static int run_werl;
-
+static WCHAR *utf8_to_utf16(unsigned char *bytes);
+static char *utf16_to_utf8(WCHAR *wstr);
+static WCHAR *latin1_to_utf16(char *str);
#endif
/*
@@ -263,8 +265,12 @@ static void
set_env(char *key, char *value)
{
#ifdef __WIN32__
- if (!SetEnvironmentVariable((LPCTSTR) key, (LPCTSTR) value))
+ WCHAR *wkey = latin1_to_utf16(key);
+ WCHAR *wvalue = utf8_to_utf16(value);
+ if (!SetEnvironmentVariableW(wkey, wvalue))
error("SetEnvironmentVariable(\"%s\", \"%s\") failed!", key, value);
+ efree(wkey);
+ efree(wvalue);
#else
size_t size = strlen(key) + 1 + strlen(value) + 1;
char *str = emalloc(size);
@@ -277,25 +283,33 @@ set_env(char *key, char *value)
#endif
}
+
static char *
get_env(char *key)
{
#ifdef __WIN32__
DWORD size = 32;
- char *value = NULL;
+ WCHAR *value = NULL;
+ WCHAR *wkey = latin1_to_utf16(key);
+ char *res;
while (1) {
DWORD nsz;
if (value)
efree(value);
- value = emalloc(size);
+ value = emalloc(size*sizeof(WCHAR));
SetLastError(0);
- nsz = GetEnvironmentVariable((LPCTSTR) key, (LPTSTR) value, size);
+ nsz = GetEnvironmentVariableW(wkey, value, size);
if (nsz == 0 && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
efree(value);
+ efree(wkey);
return NULL;
}
- if (nsz <= size)
- return value;
+ if (nsz <= size) {
+ efree(wkey);
+ res = utf16_to_utf8(value);
+ efree(value);
+ return res;
+ }
size = nsz;
}
#else
@@ -2080,4 +2094,147 @@ possibly_quote(char* arg)
return narg;
}
+/*
+ * Unicode helpers to handle environment and command line parameters on
+ * Windows. We internally handle all environment variables in UTF8,
+ * but put and get the environment using the WCHAR (limited UTF16) interface
+ *
+ * These are simplified to only handle Unicode characters that can fit in
+ * Windows simplified UTF16, i.e. characters that fit in 16 bits.
+ */
+
+static int utf8_len(unsigned char first)
+{
+ if ((first & ((unsigned char) 0x80)) == 0) {
+ return 1;
+ } else if ((first & ((unsigned char) 0xE0)) == 0xC0) {
+ return 2;
+ } else if ((first & ((unsigned char) 0xF0)) == 0xE0) {
+ return 3;
+ } else if ((first & ((unsigned char) 0xF8)) == 0xF0) {
+ return 4;
+ }
+ return 1; /* will be a '?' */
+}
+
+static WCHAR *utf8_to_utf16(unsigned char *bytes)
+{
+ unsigned int unipoint;
+ unsigned char *tmp = bytes;
+ WCHAR *target, *res;
+ int num = 0;
+
+ while (*tmp) {
+ num++;
+ tmp += utf8_len(*tmp);
+ }
+ res = target = emalloc((num + 1) * sizeof(WCHAR));
+ while (*bytes) {
+ if (((*bytes) & ((unsigned char) 0x80)) == 0) {
+ unipoint = (Uint) *bytes;
+ ++bytes;
+ } else if (((*bytes) & ((unsigned char) 0xE0)) == 0xC0) {
+ unipoint =
+ (((Uint) ((*bytes) & ((unsigned char) 0x1F))) << 6) |
+ ((Uint) (bytes[1] & ((unsigned char) 0x3F)));
+ bytes += 2;
+ } else if (((*bytes) & ((unsigned char) 0xF0)) == 0xE0) {
+ unipoint =
+ (((Uint) ((*bytes) & ((unsigned char) 0xF))) << 12) |
+ (((Uint) (bytes[1] & ((unsigned char) 0x3F))) << 6) |
+ ((Uint) (bytes[2] & ((unsigned char) 0x3F)));
+ if (unipoint > 0xFFFF) {
+ unipoint = (unsigned int) '?';
+ }
+ bytes +=3;
+ } else if (((*bytes) & ((unsigned char) 0xF8)) == 0xF0) {
+ unipoint = (unsigned int) '?'; /* Cannot put in a wchar */
+ bytes += 4;
+ } else {
+ unipoint = (unsigned int) '?';
+ }
+ *target++ = (WCHAR) unipoint;
+ }
+ *target = L'\0';
+ return res;
+}
+
+static int put_utf8(WCHAR ch, unsigned char *target, int sz, int *pos)
+{
+ Uint x = (Uint) ch;
+ if (x < 0x80) {
+ if (*pos >= sz) {
+ return -1;
+ }
+ target[(*pos)++] = (unsigned char) x;
+ }
+ else if (x < 0x800) {
+ if (((*pos) + 1) >= sz) {
+ return -1;
+ }
+ target[(*pos)++] = (((unsigned char) (x >> 6)) |
+ ((unsigned char) 0xC0));
+ target[(*pos)++] = (((unsigned char) (x & 0x3F)) |
+ ((unsigned char) 0x80));
+ } else {
+ if ((x >= 0xD800 && x <= 0xDFFF) ||
+ (x == 0xFFFE) ||
+ (x == 0xFFFF)) { /* Invalid unicode range */
+ return -1;
+ }
+ if (((*pos) + 2) >= sz) {
+ return -1;
+ }
+
+ target[(*pos)++] = (((unsigned char) (x >> 12)) |
+ ((unsigned char) 0xE0));
+ target[(*pos)++] = ((((unsigned char) (x >> 6)) & 0x3F) |
+ ((unsigned char) 0x80));
+ target[(*pos)++] = (((unsigned char) (x & 0x3F)) |
+ ((unsigned char) 0x80));
+ }
+ return 0;
+}
+
+static int need_bytes_for_utf8(WCHAR x)
+{
+ if (x < 0x80)
+ return 1;
+ else if (x < 0x800)
+ return 2;
+ else
+ return 3;
+}
+
+static WCHAR *latin1_to_utf16(char *str)
+{
+ int len = strlen(str);
+ int i;
+ WCHAR *wstr = emalloc((len+1) * sizeof(WCHAR));
+ for(i=0;i<len;++i)
+ wstr[i] = (WCHAR) str[i];
+ wstr[len] = L'\0';
+ return wstr;
+}
+
+static char *utf16_to_utf8(WCHAR *wstr)
+{
+ int len = wcslen(wstr);
+ char *result;
+ int i,pos;
+ int reslen = 0;
+ for(i=0;i<len;++i) {
+ reslen += need_bytes_for_utf8(wstr[i]);
+ }
+ result = emalloc(reslen+1);
+ pos = 0;
+ for(i=0;i<len;++i) {
+ if (put_utf8((int) wstr[i], result, reslen, &pos) < 0) {
+ break;
+ }
+ }
+ result[pos] = '\0';
+ return result;
+}
+
#endif