X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=builtin-mailinfo.c;h=cf5ef29c0fa524799675734a3b4355ab326c76aa;hb=41b200179dfac7bf4c3b98270951937b537e2b24;hp=b8d7dbc0b71929a95aaebd79d5912897d5eb70e7;hpb=b0ed9eafb35b2330d5a96be79307f0e65547febb;p=thirdparty%2Fgit.git

diff --git a/builtin-mailinfo.c b/builtin-mailinfo.c
index b8d7dbc0b7..cf5ef29c0f 100644
--- a/builtin-mailinfo.c
+++ b/builtin-mailinfo.c
@@ -2,17 +2,9 @@
  * Another stupid program, this one parsing the headers of an
  * email to figure out authorship and subject
  */
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#ifndef NO_ICONV
-#include <iconv.h>
-#endif
-#include "git-compat-util.h"
 #include "cache.h"
 #include "builtin.h"
+#include "utf8.h"
 
 static FILE *cmitmsg, *patchfile, *fin, *fout;
 
@@ -414,6 +406,11 @@ static int is_rfc2822_header(char *line)
 	 */
 	int ch;
 	char *cp = line;
+
+	/* Count mbox From headers as headers */
+	if (!memcmp(line, "From ", 5) || !memcmp(line, ">From ", 6))
+		return 1;
+
 	while ((ch = *cp++)) {
 		if (ch == ':')
 			return cp != line;
@@ -425,30 +422,61 @@ static int is_rfc2822_header(char *line)
 	return 0;
 }
 
+/*
+ * sz is size of 'line' buffer in bytes.  Must be reasonably
+ * long enough to hold one physical real-world e-mail line.
+ */
 static int read_one_header_line(char *line, int sz, FILE *in)
 {
-	int ofs = 0;
-	while (ofs < sz) {
-		int peek, len;
-		if (fgets(line + ofs, sz - ofs, in) == NULL)
-			break;
-		len = eatspace(line + ofs);
-		if ((len == 0) || !is_rfc2822_header(line)) {
-			/* Re-add the newline */
-			line[ofs + len] = '\n';
-			line[ofs + len + 1] = '\0';
-			break;
-		}
-		ofs += len;
-		/* Yuck, 2822 header "folding" */
+	int len;
+
+	/*
+	 * We will read at most (sz-1) bytes and then potentially
+	 * re-add NUL after it.  Accessing line[sz] after this is safe
+	 * and we can allow len to grow up to and including sz.
+	 */
+	sz--;
+
+	/* Get the first part of the line. */
+	if (!fgets(line, sz, in))
+		return 0;
+
+	/*
+	 * Is it an empty line or not a valid rfc2822 header?
+	 * If so, stop here, and return false ("not a header")
+	 */
+	len = eatspace(line);
+	if (!len || !is_rfc2822_header(line)) {
+		/* Re-add the newline */
+		line[len] = '\n';
+		line[len + 1] = '\0';
+		return 0;
+	}
+
+	/*
+	 * Now we need to eat all the continuation lines..
+	 * Yuck, 2822 header "folding"
+	 */
+	for (;;) {
+		int peek, addlen;
+		static char continuation[1000];
+
 		peek = fgetc(in); ungetc(peek, in);
 		if (peek != ' ' && peek != '\t')
 			break;
+		if (!fgets(continuation, sizeof(continuation), in))
+			break;
+		addlen = eatspace(continuation);
+		if (len < sz - 1) {
+			if (addlen >= sz - len)
+				addlen = sz - len - 1;
+			memcpy(line + len, continuation, addlen);
+			len += addlen;
+		}
 	}
-	/* Count mbox From headers as headers */
-	if (!ofs && (!memcmp(line, "From ", 5) || !memcmp(line, ">From ", 6)))
-		ofs = 1;
-	return ofs;
+	line[len] = 0;
+
+	return 1;
 }
 
 static int decode_q_segment(char *in, char *ot, char *ep, int rfc2047)
@@ -519,40 +547,15 @@ static int decode_b_segment(char *in, char *ot, char *ep)
 
 static void convert_to_utf8(char *line, char *charset)
 {
-#ifndef NO_ICONV
-	char *in, *out;
-	size_t insize, outsize, nrc;
-	char outbuf[4096]; /* cheat */
 	static char latin_one[] = "latin1";
 	char *input_charset = *charset ? charset : latin_one;
-	iconv_t conv = iconv_open(metainfo_charset, input_charset);
-
-	if (conv == (iconv_t) -1) {
-		static int warned_latin1_once = 0;
-		if (input_charset != latin_one) {
-			fprintf(stderr, "cannot convert from %s to %s\n",
-				input_charset, metainfo_charset);
-			*charset = 0;
-		}
-		else if (!warned_latin1_once) {
-			warned_latin1_once = 1;
-			fprintf(stderr, "tried to convert from %s to %s, "
-				"but your iconv does not work with it.\n",
-				input_charset, metainfo_charset);
-		}
-		return;
-	}
-	in = line;
-	insize = strlen(in);
-	out = outbuf;
-	outsize = sizeof(outbuf);
-	nrc = iconv(conv, &in, &insize, &out, &outsize);
-	iconv_close(conv);
-	if (nrc == (size_t) -1)
-		return;
-	*out = 0;
-	strcpy(line, outbuf);
-#endif
+	char *out = reencode_string(line, metainfo_charset, input_charset);
+
+	if (!out)
+		die("cannot convert from %s to %s\n",
+		    input_charset, metainfo_charset);
+	strcpy(line, out);
+	free(out);
 }
 
 static int decode_header_bq(char *it)
@@ -827,16 +830,23 @@ static const char mailinfo_usage[] =
 
 int cmd_mailinfo(int argc, const char **argv, const char *prefix)
 {
+	const char *def_charset;
+
 	/* NEEDSWORK: might want to do the optional .git/ directory
 	 * discovery
 	 */
 	git_config(git_default_config);
 
+	def_charset = (git_commit_encoding ? git_commit_encoding : "utf-8");
+	metainfo_charset = def_charset;
+
 	while (1 < argc && argv[1][0] == '-') {
 		if (!strcmp(argv[1], "-k"))
 			keep_subject = 1;
 		else if (!strcmp(argv[1], "-u"))
-			metainfo_charset = git_commit_encoding;
+			metainfo_charset = def_charset;
+		else if (!strcmp(argv[1], "-n"))
+			metainfo_charset = NULL;
 		else if (!strncmp(argv[1], "--encoding=", 11))
 			metainfo_charset = argv[1] + 11;
 		else