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Correctly handle Big Endian UCS strings on both BE and LE machines.

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This commit is contained in:
Vreixo Formoso 2008-01-08 15:51:42 +01:00
parent e9bcb22cee
commit f73b53133b
2 changed files with 50 additions and 15 deletions
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63
src/util.c
View File

@ -234,6 +234,31 @@ int str2ascii(const char *icharset, const char *input, char **output)
return ISO_SUCCESS;
}
static
void set_ucsbe(uint16_t *ucs, char c)
{
char *v = (char*)ucs;
v[0] = (char)0;
v[1] = c;
}
/**
* @return
* -1, 0, 1 if *ucs <, == or > than c
*/
static
int cmp_ucsbe(const uint16_t *ucs, char c)
{
char *v = (char*)ucs;
if (v[0] != 0) {
return 1;
} else if (v[1] == c) {
return 0;
} else {
return (uint8_t)c > (uint8_t)v[1] ? -1 : 1;
}
}
int str2ucs(const char *icharset, const char *input, uint16_t **output)
{
int result;
@ -292,9 +317,8 @@ int str2ucs(const char *icharset, const char *input, uint16_t **output)
/* The last possible error is an invalid multi bytes
* sequence. Just replace the character with a "_".
* Probably the character doesn't exist in ascii like
* "é, è, à, ç, ..." in French. */
*((uint16_t*) ret) = '_';
* Probably the character doesn't exist in UCS */
set_ucsbe((uint16_t*) ret, '_');
ret += sizeof(uint16_t);
outbytes -= sizeof(uint16_t);
@ -316,7 +340,7 @@ int str2ucs(const char *icharset, const char *input, uint16_t **output)
iconv_close(conv);
/* close the ucs string */
*((uint16_t*) ret) = 0;
set_ucsbe((uint16_t*) ret, '\0');
free(wsrc_);
*output = (uint16_t*)ret_;
@ -336,9 +360,9 @@ static int valid_a_char(char c)
static int valid_j_char(uint16_t c)
{
return !(c < (uint16_t)' ' || c == (uint16_t)'*' || c == (uint16_t)'/'
|| c == (uint16_t)':' || c == (uint16_t)';' || c == (uint16_t)'?'
|| c == (uint16_t)'\\');
return cmp_ucsbe(&c, ' ') != -1 && cmp_ucsbe(&c, '*') && cmp_ucsbe(&c, '/')
&& cmp_ucsbe(&c, ':') && cmp_ucsbe(&c, ';') && cmp_ucsbe(&c, '?')
&& cmp_ucsbe(&c, '\\');
}
static
@ -485,7 +509,7 @@ uint16_t *iso_j_id(const uint16_t *src)
* lnext). If the original filename is too long, we start by trimming
* the extension, but keep a minimum extension length of 3.
*/
if (dot == NULL || *(dot + 1) == (uint16_t)'\0') {
if (dot == NULL || cmp_ucsbe(dot + 1, '\0') == 0) {
lname = ucslen(src);
lnname = (lname > 64) ? 64 : lname;
lext = lnext = 0;
@ -506,16 +530,27 @@ uint16_t *iso_j_id(const uint16_t *src)
/* Convert up to lnname characters of the filename. */
for (i = 0; i < lnname; i++) {
uint16_t c = src[i];
dest[pos++] = valid_j_char(c) ? c : (uint16_t)'_';
if (valid_j_char(c)) {
dest[pos++] = c;
} else {
set_ucsbe(dest + pos, '_');
pos++;
}
dest[pos++] = (uint16_t)'.';
}
set_ucsbe(dest + pos, '.');
pos++;
/* Convert up to lnext characters of the extension, if any. */
for (i = 0; i < lnext; i++) {
uint16_t c = src[lname + 1 + i];
dest[pos++] = valid_j_char(c) ? c : (uint16_t)'_';
if (valid_j_char(c)) {
dest[pos++] = c;
} else {
set_ucsbe(dest + pos, '_');
pos++;
}
dest[pos] = (uint16_t)'\0';
}
set_ucsbe(dest + pos, '\0');
return ucsdup(dest);
}
@ -528,12 +563,12 @@ size_t ucslen(const uint16_t *str)
return i;
}
uint16_t *ucsrchr(const uint16_t *str, uint16_t c)
uint16_t *ucsrchr(const uint16_t *str, char c)
{
size_t len = ucslen(str);
while (len-- > 0) {
if (str[len] == c) {
if (cmp_ucsbe(str + len, c) == 0) {
return (uint16_t*)(str + len);
}
}

2
src/util.h
View File

@ -134,7 +134,7 @@ size_t ucslen(const uint16_t *str);
/**
* Like strrchr, but for Joliet strings.
*/
uint16_t *ucsrchr(const uint16_t *str, uint16_t c);
uint16_t *ucsrchr(const uint16_t *str, char c);
/**
* Like strdup, but for Joliet strings.