blaze822: api refactoring

blaze822.c

@@ -337,8 +337,7 @@ blaze822(char *file)
 
 	mesg->msg = buf;
 	mesg->end = end;
-	mesg->body = 0;
-	mesg->bodyend = 0;
+	mesg->body = mesg->bodyend = mesg->bodychunk = 0;
 
 	return mesg;
 }
@@ -355,41 +354,37 @@ blaze822_mem(char *src, size_t len)
 		return 0;
 
 	end = memmem(src, len, "\n\n", 2);
-	if (!end) end = memmem(src, len, "\r\n\r\n", 4);
-	if (!end) end = src + len;
+	if (!end)
+		end = memmem(src, len, "\r\n\r\n", 4);
+	if (!end)
+		end = src + len;
 
-	len = end - src;
+	size_t hlen = end - src;
 
-	buf = malloc(len+1);
+	buf = malloc(hlen+1);
 	if (!buf)
 		return 0;
-	memcpy(buf, src, len);
+	memcpy(buf, src, hlen);
 
-	end = buf+len+1;
+	end = buf+hlen+1;
 	*end = 0;   // dereferencing *end is safe
 
 	unfold_hdr(buf, end);
 
 	mesg->msg = buf;
 	mesg->end = end;
-	mesg->body = 0;
-	mesg->bodyend = 0;
+	mesg->body = src + hlen;
+	mesg->bodyend = src + len;
+	mesg->bodychunk = 0;   // src is not ours
 
 	return mesg;
 }
 
-void
-blaze822_mem_body(struct message *mesg, char *buf, size_t len)
-{
-	mesg->body = buf + (mesg->end - mesg->msg - 2);
-	mesg->bodyend = buf + len - (mesg->end - mesg->msg - 2);
-}
-
 void
 blaze822_free(struct message *mesg)
 {
 	free(mesg->msg);
-	// XXX body? keep track who malloced it?
+	free(mesg->bodychunk);
 	free(mesg);
 }
 
@@ -434,24 +429,8 @@ blaze822_loop(int argc, char *argv[], void (*cb)(char *))
 	return i;
 }
 
-int
-blaze822_body(struct message *mesg, char *file)
-{
-	int fd = open(file, O_RDONLY);
-	if (fd < 0)
-		return fd;
-
-	if (lseek(fd, mesg->end - mesg->msg - 2, SEEK_SET) < 0) {
-		perror("lseek");
-		close(fd);
-		return -1;
-	}
-
-	return fd;
-}
-
-int
-blaze822_file_body(struct message *mesg, char *file)
+struct message *
+blaze822_file(char *file)
 {
 	int fd = open(file, O_RDONLY);
 	if (fd < 0)
@@ -461,29 +440,39 @@ blaze822_file_body(struct message *mesg, char *file)
 	if (fstat(fd, &st) < 0)
 		goto error;
 
-	if (lseek(fd, mesg->end - mesg->msg - 2, SEEK_SET) < 0) {
-		perror("lseek");
-		goto error;
-	}
-
-	size_t s = st.st_size - (mesg->end - mesg->msg - 2);
+	size_t s = st.st_size;
 
-	char *body = malloc(s+1);
-	if (read(fd, body, s) < 0) {
+	char *buf = malloc(s+1);
+	if (read(fd, buf, s) < 0) {
 		// XXX handle short reads?
 		perror("read");
 		goto error;
 	}
-	body[s] = 0;
+	close(fd);
 
-	mesg->body = body;
-	mesg->bodyend = body+s;
+	buf[s] = 0;
 
-	close(fd);
-	return 1;
+	// XXX duplicate header in ram...
+	struct message *mesg = blaze822_mem(buf, s);
+	if (mesg)
+		mesg->bodychunk = buf;
+	return mesg;
 
 error:
 	close(fd);
-	return -1;
+	return 0;
 }
 
+char *
+blaze822_body(struct message *mesg)
+{
+	return mesg->body;
+}
+
+size_t
+blaze822_bodylen(struct message *mesg)
+{
+	if (!mesg->body || !mesg->bodyend)
+		return 0;
+	return mesg->bodyend - mesg->body;
+}

blaze822.h

@@ -1,20 +1,29 @@
 #include <stdint.h>
+#include <sys/types.h>
 
 struct message;
 
-struct message *blaze822(char *file);
-struct message *blaze822_mem(char *buf, size_t len);
-void blaze822_free(struct message *mesg);
+// blaze822.c
+
+struct message *blaze822(char *file);       // just header
+struct message *blaze822_file(char *file);  // header + body
+struct message *blaze822_mem(char *buf, size_t len);  // header + body
+
 char *blaze822_hdr_(struct message *mesg, const char *hdr, size_t len);
 #define blaze822_hdr(mesg, hdr) blaze822_hdr_(mesg, "\0" hdr ":", 2+strlen((hdr)))
-int blaze822_body(struct message *mesg, char *file);
-void blaze822_mem_body(struct message *mesg, char *buf, size_t len);
 
-int blaze822_loop(int, char **, void (*)(char *));
+void blaze822_free(struct message *mesg);
 
 time_t blaze822_date(char *);
 char *blaze822_addr(char *, char **, char **);
+char *blaze822_body(struct message *mesg);
+size_t blaze822_bodylen(struct message *mesg);
+
+int blaze822_loop(int, char **, void (*)(char *));
 
+// rfc2047.c
 
 int blaze822_decode_rfc2047(char *, char *, size_t, char *);
+int blaze822_decode_qp(char *start, char *stop, char **deco, size_t *decleno);
+int blaze822_decode_b64(char *start, char *stop, char **deco, size_t *decleno);
 

blaze822_priv.h

@@ -3,4 +3,7 @@ struct message {
 	char *end;
 	char *body;
 	char *bodyend;
+	char *bodychunk;
 };
+
+#define iswsp(c)  (((c) == ' ' || (c) == '\t'))

rfc2047.c

@@ -14,7 +14,7 @@
 // XXX keep trying bytewise on invalid iconv
 
 int
-decode_qp(char *start, char *stop, char **deco, size_t *decleno)
+blaze822_decode_qp(char *start, char *stop, char **deco, size_t *decleno)
 {
 	static signed char hex[] = {
 		-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
@@ -55,8 +55,9 @@ decode_qp(char *start, char *stop, char **deco, size_t *decleno)
 	*decleno = buf - *deco;
 	return 1;
 }
+
 int
-decode_b64(char *s, char *e, char **deco, size_t *decleno)
+blaze822_decode_b64(char *s, char *e, char **deco, size_t *decleno)
 {
 	static signed char b64[128] = {
 		-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
@@ -153,9 +154,9 @@ blaze822_decode_rfc2047(char *dst, char *src, size_t dlen, char *tgtenc)
 		char *dec;
 		size_t declen;
 		if (enc == 'q')
-			decode_qp(start, stop, &dec, &declen);
+			blaze822_decode_qp(start, stop, &dec, &declen);
 		else if (enc == 'b')
-			decode_b64(start, stop, &dec, &declen);
+			blaze822_decode_b64(start, stop, &dec, &declen);
 		else
 			goto nocode;