1 files changed, 272 insertions, 0 deletions
diff --git a/media/webrtc/signaling/src/sdp/sipcc/cpr_string.c b/media/webrtc/signaling/src/sdp/sipcc/cpr_string.c
new file mode 100644
index 000000000..c210c3971
--- /dev/null
+++ b/media/webrtc/signaling/src/sdp/sipcc/cpr_string.c
@@ -0,0 +1,272 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdarg.h>
+
+#include "mozilla/Assertions.h"
+#include "cpr_types.h"
+#include "cpr_string.h"
+#include "cpr_strings.h"
+
+/* From cpr_stdlib.h */
+#include "mozilla/mozalloc.h"
+
+#define cpr_malloc(a) moz_xmalloc(a)
+#define cpr_calloc(a, b) moz_xcalloc(a, b)
+#define cpr_realloc(a, b) moz_xrealloc(a, b)
+#define cpr_free(a) free(a)
+
+
+/**
+ * sstrncpy
+ *
+ * This is Cisco's *safe* version of strncpy.  The string will always
+ * be NUL terminated (which is not ANSI compliant).
+ *
+ * Parameters: s1  - first string
+ *             s2  - second string
+ *             max - maximum length in octets to concat.
+ *
+ * Return:     Pointer to the *end* of the string
+ *
+ * Remarks:    Modified to be explicitly safe for all inputs.
+ *             Also return the number of characters copied excluding the
+ *             NUL terminator vs. the original string s1.  This simplifies
+ *             code where sstrncat functions follow.
+ */
+unsigned long
+sstrncpy (char *dst, const char *src, unsigned long max)
+{
+    unsigned long cnt = 0;
+
+    if (dst == NULL) {
+        return 0;
+    }
+
+    if (src) {
+        while ((max-- > 1) && (*src)) {
+            *dst = *src;
+            dst++;
+            src++;
+            cnt++;
+        }
+    }
+
+#if defined(CPR_SSTRNCPY_PAD)
+    /*
+     * To be equivalent to the TI compiler version
+     * v2.01, SSTRNCPY_PAD needs to be defined
+     */
+    while (max-- > 1) {
+        *dst = '\0';
+        dst++;
+    }
+#endif
+    *dst = '\0';
+
+    return cnt;
+}
+
+/**
+ * sstrncat
+ *
+ * This is Cisco's *safe* version of strncat.  The string will always
+ * be NUL terminated (which is not ANSI compliant).
+ *
+ * Parameters: s1  - first string
+ *             s2  - second string
+ *             max - maximum length in octets to concatenate
+ *
+ * Return:     Pointer to the *end* of the string
+ *
+ * Remarks:    Modified to be explicitly safe for all inputs.
+ *             Also return the end vs. the beginning of the string s1
+ *             which is useful for multiple sstrncat calls.
+ */
+char *
+sstrncat (char *s1, const char *s2, unsigned long max)
+{
+    if (s1 == NULL)
+        return (char *) NULL;
+
+    while (*s1)
+        s1++;
+
+    if (s2) {
+        while ((max-- > 1) && (*s2)) {
+            *s1 = *s2;
+            s1++;
+            s2++;
+        }
+    }
+    *s1 = '\0';
+
+    return s1;
+}
+
+/*
+ * flex_string
+ */
+
+/*
+ * flex_string_init
+ *
+ * Not thread-safe
+ */
+void flex_string_init(flex_string *fs) {
+  fs->buffer_length = FLEX_STRING_CHUNK_SIZE;
+  fs->string_length = 0;
+  fs->buffer = cpr_malloc(fs->buffer_length);
+  fs->buffer[0] = '\0';
+}
+
+/*
+ * flex_string_free
+ *
+ * Not thread-safe
+ */
+void flex_string_free(flex_string *fs) {
+  fs->buffer_length = 0;
+  fs->string_length = 0;
+  cpr_free(fs->buffer);
+  fs->buffer = NULL;
+}
+
+/* For sanity check before alloc */
+#define FLEX_STRING_MAX_SIZE (10 * 1024 * 1024) /* 10MB */
+
+/*
+ * flex_string_check_alloc
+ *
+ * Allocate enough chunks to hold the new minimum size.
+ *
+ * Not thread-safe
+ */
+void flex_string_check_alloc(flex_string *fs, size_t new_min_length) {
+  if (new_min_length > fs->buffer_length) {
+    /* Oversize, allocate more */
+
+    /* Sanity check on allocation size */
+    if (new_min_length > FLEX_STRING_MAX_SIZE) {
+      MOZ_CRASH();
+    }
+
+    /* Alloc to nearest chunk */
+    fs->buffer_length = (((new_min_length - 1) / FLEX_STRING_CHUNK_SIZE) + 1) * FLEX_STRING_CHUNK_SIZE;
+
+    fs->buffer = cpr_realloc(fs->buffer, fs->buffer_length);
+  }
+}
+
+/*
+ * flex_string_append
+ *
+ * Not thread-safe
+ */
+void flex_string_append(flex_string *fs, const char *more) {
+  fs->string_length += strlen(more);
+
+  flex_string_check_alloc(fs, fs->string_length + 1);
+
+  sstrncat(fs->buffer, more, fs->buffer_length - strlen(fs->buffer));
+}
+
+/*
+ * va_copy is part of the C99 spec but MSVC doesn't have it.
+ */
+#ifndef va_copy
+#define va_copy(d,s) ((d) = (s))
+#endif
+
+/*
+ * flex_string_vsprintf
+ *
+ * Not thread-safe
+ */
+void flex_string_vsprintf(flex_string *fs, const char *format, va_list original_ap) {
+  va_list ap;
+  int vsnprintf_result;
+
+  va_copy(ap, original_ap);
+  vsnprintf_result = vsnprintf(fs->buffer + fs->string_length, fs->buffer_length - fs->string_length, format, ap);
+  va_end(ap);
+
+  /* Special case just for Windows where vsnprintf is broken
+     and returns -1 if buffer too large unless you size it 0. */
+  if (vsnprintf_result < 0) {
+    va_copy(ap, original_ap);
+    vsnprintf_result = vsnprintf(NULL, 0, format, ap);
+    va_end(ap);
+  }
+
+  if (fs->string_length + vsnprintf_result >= fs->buffer_length) {
+    /* Buffer overflow, resize */
+    flex_string_check_alloc(fs, fs->string_length + vsnprintf_result + 1);
+
+    /* Try again with new buffer */
+    va_copy(ap, original_ap);
+    vsnprintf_result = vsnprintf(fs->buffer + fs->string_length, fs->buffer_length - fs->string_length, format, ap);
+    va_end(ap);
+    MOZ_ASSERT(vsnprintf_result > 0 &&
+               (size_t)vsnprintf_result < (fs->buffer_length - fs->string_length));
+  }
+
+  if (vsnprintf_result > 0) {
+    fs->string_length += vsnprintf_result;
+  }
+}
+
+/*
+ * flex_string_sprintf
+ *
+ * Not thread-safe
+ */
+void flex_string_sprintf(flex_string *fs, const char *format, ...) {
+  va_list ap;
+
+  va_start(ap, format);
+  flex_string_vsprintf(fs, format, ap);
+  va_end(ap);
+}
+
+
+
+/* From cpr_linux_string.c */
+/**
+ * cpr_strdup
+ *
+ * @brief The CPR wrapper for strdup
+
+ * The cpr_strdup shall return a pointer to a new string, which is a duplicate
+ * of the string pointed to by "str" argument. A null pointer is returned if the
+ * new string cannot be created.
+ *
+ * @param[in] str  - The string that needs to be duplicated
+ *
+ * @return The duplicated string or NULL in case of no memory
+ *
+ */
+char *
+cpr_strdup (const char *str)
+{
+    char *dup;
+    size_t len;
+
+    if (!str) {
+        return (char *) NULL;
+    }
+
+    len = strlen(str);
+    if (len == 0) {
+        return (char *) NULL;
+    }
+    len++;
+
+    dup = cpr_malloc(len * sizeof(char));
+    if (!dup) {
+        return (char *) NULL;
+    }
+    (void) memcpy(dup, str, len);
+    return dup;
+}