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-rw-r--r--lib/strcase.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/lib/strcase.c b/lib/strcase.c
index 24bcca932..098cec7a8 100644
--- a/lib/strcase.c
+++ b/lib/strcase.c
@@ -93,6 +93,75 @@ char Curl_raw_toupper(char in)
return in;
}
+
+/* Portable, consistent tolower (remember EBCDIC). Do not use tolower() because
+ its behavior is altered by the current locale. */
+char Curl_raw_tolower(char in)
+{
+#if !defined(CURL_DOES_CONVERSIONS)
+ if(in >= 'A' && in <= 'Z')
+ return (char)('a' + in - 'A');
+#else
+ switch(in) {
+ case 'A':
+ return 'a';
+ case 'B':
+ return 'b';
+ case 'C':
+ return 'c';
+ case 'D':
+ return 'd';
+ case 'E':
+ return 'e';
+ case 'F':
+ return 'f';
+ case 'G':
+ return 'g';
+ case 'H':
+ return 'h';
+ case 'I':
+ return 'i';
+ case 'J':
+ return 'j';
+ case 'K':
+ return 'k';
+ case 'L':
+ return 'l';
+ case 'M':
+ return 'm';
+ case 'N':
+ return 'n';
+ case 'O':
+ return 'o';
+ case 'P':
+ return 'p';
+ case 'Q':
+ return 'q';
+ case 'R':
+ return 'r';
+ case 'S':
+ return 's';
+ case 'T':
+ return 't';
+ case 'U':
+ return 'u';
+ case 'V':
+ return 'v';
+ case 'W':
+ return 'w';
+ case 'X':
+ return 'X';
+ case 'Y':
+ return 'y';
+ case 'Z':
+ return 'z';
+ }
+#endif
+
+ return in;
+}
+
+
/*
* Curl_strcasecompare() is for doing "raw" case insensitive strings. This is
* meant to be locale independent and only compare strings we know are safe
@@ -165,6 +234,21 @@ void Curl_strntoupper(char *dest, const char *src, size_t n)
} while(*src++ && --n);
}
+/* Copy a lower case version of the string from src to dest. The
+ * strings may overlap. No more than n characters of the string are copied
+ * (including any NUL) and the destination string will NOT be
+ * NUL-terminated if that limit is reached.
+ */
+void Curl_strntolower(char *dest, const char *src, size_t n)
+{
+ if(n < 1)
+ return;
+
+ do {
+ *dest++ = Curl_raw_tolower(*src);
+ } while(*src++ && --n);
+}
+
/* --- public functions --- */
int curl_strequal(const char *first, const char *second)