Import of the watch repository from Pebble

src/libutil/includes/util/string.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <string.h>
+
+// For some reason the string.h that newlib generates doesn't have this definition,
+// but if you just extern this the libc still has the right symbol. Weirdddd.
+size_t strnlen(const char *, size_t);
+
+const char *string_strip_leading_whitespace(const char * string);
+
+void string_strip_trailing_whitespace(const char *string, char *string_out);
+
+#define IS_EMPTY_STRING(s) (s[0] == '\0')
+
+// Stolen from http://stackoverflow.com/a/8488201
+#define GET_FILE_NAME(file) (strrchr(file, '/') ? (strrchr(file, '/') + 1) : (file))
+
+//! Converts an unsigned integer value to a null-terminated hex-value string and stores the result
+//! in buffer.
+void itoa(uint32_t num, char *buffer, int buffer_length);
+
+//! Converts a signed integer value to a null-terminated string and stores the result in buffer.
+//! NOTE: Buffer must be long enough to fit a string 12 bytes long.
+void itoa_int(int n, char *str, int base);
+
+//! Reverses a string in place
+void string_reverse(char *str);
+
+uintptr_t str_to_address(const char *address_str);
+
+const char *bool_to_str(bool b);
+
+//! @param hex 12-digit hex string representing a BT address
+//! @param addr Points to a SS1 BD_ADDR_t as defined in BTBTypes.h
+//! @return True on success
+bool convert_bt_addr_hex_str_to_bd_addr(const char *hex_str, uint8_t *bd_addr, const unsigned int bd_addr_size);
+
+//! Concatenates a simple string and a number.
+//! NOTE: Buffer must be long enough to fit the largest number value (12 bytes) and the string, plus
+//! A null-terminated character
+void concat_str_int(const char *str, uint32_t num, char *buf, uint8_t buf_len);
+
+//! Convert an ASCII string to uppercase
+void toupper_str(char *str);
+
+//! Converts a byte stream to a hex string, i.e ({0xaa, 0xbb, 0xcc} -> "aabbcc")
+void byte_stream_to_hex_string(char *out_buf, size_t out_buf_len,
+    const uint8_t *byte_stream, size_t byte_stream_len, bool stream_backward);
+
+//! Appends the src string to dst, taking the overall size of the dst buffer into account
+//! @param dst Destination string to append to
+//! @param src String to append
+//! @param dst_space Total size of dst buffer
+void safe_strcat(char* dst, const char* src, int dst_space);