Add SPDX license identifiers to source files under the LGPL

[thirdparty/systemd.git] / src / basic / extract-word.c

diff --git a/src/basic/extract-word.c b/src/basic/extract-word.c
index 7cc2a1de136761ac013cc661884095aee86440d6..5e425604872428af8e89683fc8f42d57fbb10cc7 100644 (file)
--- a/src/basic/extract-word.c
+++ b/src/basic/extract-word.c
@@ -1,5 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.
 
@@ -50,7 +49,7 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
 
         /* Bail early if called after last value or with no input */
         if (!*p)
-                goto finish_force_terminate;
+                goto finish;
         c = **p;
 
         if (!separators)
@@ -65,12 +64,12 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                 if (!GREEDY_REALLOC(s, allocated, sz+1))
                         return -ENOMEM;
 
-        for (;; (*p) ++, c = **p) {
+        for (;; (*p)++, c = **p) {
                 if (c == 0)
                         goto finish_force_terminate;
                 else if (strchr(separators, c)) {
                         if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
-                                (*p) ++;
+                                (*p)++;
                                 goto finish_force_next;
                         }
                 } else {
@@ -83,7 +82,7 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                 }
         }
 
-        for (;; (*p) ++, c = **p) {
+        for (;; (*p)++, c = **p) {
                 if (backslash) {
                         if (!GREEDY_REALLOC(s, allocated, sz+7))
                                 return -ENOMEM;
@@ -107,9 +106,10 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                         }
 
                         if (flags & EXTRACT_CUNESCAPE) {
-                                uint32_t u;
+                                bool eight_bit = false;
+                                char32_t u;
 
-                                r = cunescape_one(*p, (size_t) -1, &c, &u);
+                                r = cunescape_one(*p, (size_t) -1, &u, &eight_bit);
                                 if (r < 0) {
                                         if (flags & EXTRACT_CUNESCAPE_RELAX) {
                                                 s[sz++] = '\\';
@@ -119,10 +119,10 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                                 } else {
                                         (*p) += r - 1;
 
-                                        if (c != 0)
-                                                s[sz++] = c; /* normal explicit char */
+                                        if (eight_bit)
+                                                s[sz++] = u;
                                         else
-                                                sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
+                                                sz += utf8_encode_unichar(s + sz, u);
                                 }
                         } else
                                 s[sz++] = c;
@@ -130,7 +130,7 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                         backslash = false;
 
                 } else if (quote) {     /* inside either single or double quotes */
-                        for (;; (*p) ++, c = **p) {
+                        for (;; (*p)++, c = **p) {
                                 if (c == 0) {
                                         if (flags & EXTRACT_RELAX)
                                                 goto finish_force_terminate;
@@ -150,10 +150,10 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                         }
 
                 } else {
-                        for (;; (*p) ++, c = **p) {
+                        for (;; (*p)++, c = **p) {
                                 if (c == 0)
                                         goto finish_force_terminate;
-                                else if ((c == '\'' || c == '"') && (flags & EXTRACT_QUOTES)) {
+                                else if (IN_SET(c, '\'', '"') && (flags & EXTRACT_QUOTES)) {
                                         quote = c;
                                         break;
                                 } else if (c == '\\' && !(flags & EXTRACT_RETAIN_ESCAPE)) {
@@ -161,11 +161,11 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra
                                         break;
                                 } else if (strchr(separators, c)) {
                                         if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
-                                                (*p) ++;
+                                                (*p)++;
                                                 goto finish_force_next;
                                         }
                                         /* Skip additional coalesced separators. */
-                                        for (;; (*p) ++, c = **p) {
+                                        for (;; (*p)++, c = **p) {
                                                 if (c == 0)
                                                         goto finish_force_terminate;
                                                 if (!strchr(separators, c))
@@ -228,8 +228,8 @@ int extract_first_word_and_warn(
                 *p = save;
                 r = extract_first_word(p, ret, separators, flags|EXTRACT_CUNESCAPE_RELAX);
                 if (r >= 0) {
-                        /* It worked this time, hence it must have been an invalid escape sequence we could correct. */
-                        log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Invalid escape sequences in line, correcting: \"%s\"", rvalue);
+                        /* It worked this time, hence it must have been an invalid escape sequence. */
+                        log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Ignoring unknown escape sequences: \"%s\"", *ret);
                         return r;
                 }
 
@@ -242,7 +242,12 @@ int extract_first_word_and_warn(
         return log_syntax(unit, LOG_ERR, filename, line, r, "Unable to decode word \"%s\", ignoring: %m", rvalue);
 }
 
-int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) {
+/* We pass ExtractFlags as unsigned int (to avoid undefined behaviour when passing
+ * an object that undergoes default argument promotion as an argument to va_start).
+ * Let's make sure that ExtractFlags fits into an unsigned int. */
+assert_cc(sizeof(enum ExtractFlags) <= sizeof(unsigned));
+
+int extract_many_words(const char **p, const char *separators, unsigned flags, ...) {
         va_list ap;
         char **l;
         int n = 0, i, c, r;