1 files changed, 136 insertions, 0 deletions
diff --git a/libs/libcurl/src/strparse.c b/libs/libcurl/src/strparse.c
new file mode 100644
index 0000000000..e057598732
--- /dev/null
+++ b/libs/libcurl/src/strparse.c
@@ -0,0 +1,136 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+#include "strparse.h"
+
+/* Get a word until the first DELIM or end of string. At least one byte long.
+   return non-zero on error */
+int Curl_str_until(char **linep, struct Curl_str *out,
+                   const size_t max, char delim)
+{
+  char *s = *linep;
+  size_t len = 0;
+  DEBUGASSERT(linep && *linep && out && max && delim);
+
+  out->str = NULL;
+  out->len = 0;
+  while(*s && (*s != delim)) {
+    s++;
+    if(++len > max) {
+      return STRE_BIG;
+    }
+  }
+  if(!len)
+    return STRE_SHORT;
+  out->str = *linep;
+  out->len = len;
+  *linep = s; /* point to the first byte after the word */
+  return STRE_OK;
+}
+
+/* Get a word until the first space or end of string. At least one byte long.
+   return non-zero on error */
+int Curl_str_word(char **linep, struct Curl_str *out,
+                  const size_t max)
+{
+  return Curl_str_until(linep, out, max, ' ');
+}
+
+
+/* Get a "quoted" word. No escaping possible.
+   return non-zero on error */
+int Curl_str_quotedword(char **linep, struct Curl_str *out,
+                        const size_t max)
+{
+  char *s = *linep;
+  size_t len = 0;
+  DEBUGASSERT(linep && *linep && out && max);
+
+  out->str = NULL;
+  out->len = 0;
+  if(*s != '\"')
+    return STRE_BEGQUOTE;
+  s++;
+  while(*s && (*s != '\"')) {
+    s++;
+    if(++len > max)
+      return STRE_BIG;
+  }
+  if(*s != '\"')
+    return STRE_ENDQUOTE;
+  out->str = (*linep) + 1;
+  out->len = len;
+  *linep = s + 1;
+  return STRE_OK;
+}
+
+/* Advance over a single character.
+   return non-zero on error */
+int Curl_str_single(char **linep, char byte)
+{
+  DEBUGASSERT(linep && *linep);
+  if(**linep != byte)
+    return STRE_BYTE;
+  (*linep)++; /* move over it */
+  return STRE_OK;
+}
+
+/* Advance over a single space.
+   return non-zero on error */
+int Curl_str_singlespace(char **linep)
+{
+  return Curl_str_single(linep, ' ');
+}
+
+/* Get an unsigned number. Leading zeroes are accepted.
+   return non-zero on error */
+int Curl_str_number(char **linep, size_t *nump, size_t max)
+{
+  size_t num = 0;
+  DEBUGASSERT(linep && *linep && nump);
+  *nump = 0;
+  while(ISDIGIT(**linep)) {
+    int n = **linep - '0';
+    if(num > ((SIZE_T_MAX - n) / 10))
+      return STRE_OVERFLOW;
+    num = num * 10 + n;
+    if(num > max)
+      return STRE_BIG; /** too big */
+    (*linep)++;
+  }
+  *nump = num;
+  return STRE_OK;
+}
+
+/* CR or LF
+   return non-zero on error */
+int Curl_str_newline(char **linep)
+{
+  DEBUGASSERT(linep && *linep);
+  if(ISNEWLINE(**linep)) {
+    (*linep)++;
+    return STRE_OK; /* yessir */
+  }
+  return STRE_NEWLINE;
+}