From: David Levine <levinedl@acm.org>
Date: Wed, 27 Feb 2013 01:08:38 +0000 (-0600)
Subject: Added nmh_strcasestr() because POSIX doesn't have strcasestr().
X-Git-Url: https://diplodocus.org/git/nmh/commitdiff_plain/1b95e2a0c983bf148c346085dd5a1b434e3298cf?ds=inline;hp=--cc

Added nmh_strcasestr() because POSIX doesn't have strcasestr().
---

1b95e2a0c983bf148c346085dd5a1b434e3298cf
diff --git a/h/utils.h b/h/utils.h
index 7a096a18..188d262f 100644
--- a/h/utils.h
+++ b/h/utils.h
@@ -21,3 +21,4 @@ void app_msgarg(struct msgs_array *, char *);
 int open_form(char **, char *);
 char *find_str (const char [], size_t, const char *);
 char *rfind_str (const char [], size_t, const char *);
+char *nmh_strcasestr (const char *, const char *);
diff --git a/sbr/utils.c b/sbr/utils.c
index 87fedd58..262e5767 100644
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -279,3 +279,27 @@ rfind_str (const char buf[], size_t buflen, const char *str) {
 
     return NULL;
 }
+
+
+/* POSIX doesn't have strcasestr() so emulate it. */
+char *
+nmh_strcasestr (const char *s1, const char *s2) {
+    const size_t len = strlen (s2);
+
+    if (isupper ((unsigned char) s2[0])  ||  islower ((unsigned char)s2[0])) {
+        char first[3];
+        first[0] = (char) toupper ((unsigned char) s2[0]);
+        first[1] = (char) tolower ((unsigned char) s2[0]);
+        first[2] = '\0';
+
+        for (s1 = strpbrk (s1, first); s1; s1 = strpbrk (++s1, first)) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    } else {
+        for (s1 = strchr (s1, s2[0]); s1; s1 = strchr (++s1, s2[0])) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    }
+
+    return NULL;
+}