Cosmetical changes.

1 files changed, 57 insertions, 5 deletions

diff --git a/src/utils.h b/src/utils.h
index a6c0aff..f16ea3f 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -2,7 +2,7 @@
 #define MAGI_INCLUDED_UTILS
 
 
-static void lowercase(char *str)
+static void lowercase(char * str)
 {
     if (str) {
         while (*str) {
@@ -12,20 +12,22 @@ static void lowercase(char *str)
     }
 }
 
-static char *create_str(const char *begin, const char *end)
+static char * create_str(const char * begin, const char * end)
 {
-    char *res;
+    char * res;
     res = malloc(end - begin + 1);
     if (res) {
         memcpy(res, begin, end - begin);
         res[end - begin] = 0;
+    } else {
+        magi_log("Cannot allocate string.");
     }
     return res;
 }
 
-static char *str_alloc(int len)
+static char * str_alloc(int len)
 {
-    char *str = malloc(len + 1);
+    char * str = malloc(len + 1);
     if (str) {
         str[len] = 0;
     } else {
@@ -34,5 +36,55 @@ static char *str_alloc(int len)
     return str;
 }
 
+/* Shouldn't be called with 'c' as not hex digit. */
+static char from_hex(char c)
+{
+    char num;
+    if (isdigit(c)) {
+        num = c - '0';
+    } else {
+        num = toupper(c) - 'A' + 10;
+    }
+    return num;
+}
+
+static int is_hex(char c)
+{
+    return isdigit(c) || strchr("ABCDEF", toupper(c));
+}
+
+static int add(char ** dest, int * len, int * size, char c)
+{
+    int ok = 1;
+    if (*len + 1 == *size) {
+        *size *= 2;
+        *dest = realloc(*dest, *size);
+    }
+    if (*dest == 0) {
+        ok = 0;
+        magi_log("Cannot allocate string.");
+    } else {
+        (*dest)[*len] = c;
+        ++*len;
+        (*dest)[*len] = 0;
+    }
+    return ok;
+}
+
+static int is_token(char c)
+{
+    return 32 <= c && c <= 126 && !strchr("()<>@,;:\\\"/[]?={} \t", c);
+}
+
+static int is_str_token(char * str)
+{
+    int is = str && *str; /* Empty string is not valid. */
+    while (is && *str) {
+        is = is_token(*str);
+        ++str;
+    }
+    return is;
+}
+
 
 #endif