Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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57 lines
1.7 KiB
57 lines
1.7 KiB
15 years ago
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#undef NDEBUG /* ensure tests always assert. */
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#include "upb_string.h"
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char static_str[] = "Static string.";
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int main() {
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upb_string *str = upb_string_new();
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assert(str != NULL);
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upb_string_unref(str);
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// Can also create a string by tryrecycle(NULL).
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str = upb_string_tryrecycle(NULL);
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assert(str != NULL);
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upb_strcpyc(str, static_str);
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assert(upb_string_len(str) == (sizeof(static_str) - 1));
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const char *robuf = upb_string_getrobuf(str);
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assert(robuf != NULL);
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assert(memcmp(robuf, static_str, upb_string_len(str)) == 0);
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upb_string_endread(str);
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upb_string *str2 = upb_string_tryrecycle(str);
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// No other referents, so should return the same string.
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assert(str2 == str);
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// Write a shorter string, the same memory should be reused.
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upb_strcpyc(str, "XX");
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const char *robuf2 = upb_string_getrobuf(str);
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assert(robuf2 == robuf);
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assert(memcmp(robuf2, "XX", 2) == 0);
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// Make string alias part of another string.
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str2 = upb_strdupc("WXYZ");
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upb_string_substr(str, str2, 1, 2);
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assert(upb_string_len(str) == 2);
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assert(upb_string_len(str2) == 4);
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// The two string should be aliasing the same data.
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const char *robuf3 = upb_string_getrobuf(str);
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const char *robuf4 = upb_string_getrobuf(str2);
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assert(robuf3 == robuf4 + 1);
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// The aliased string should have an extra ref.
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assert(upb_atomic_read(&str2->refcount) == 2);
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// Recycling str should eliminate the extra ref.
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str = upb_string_tryrecycle(str);
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assert(upb_atomic_read(&str2->refcount) == 1);
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// Resetting str should reuse its old data.
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upb_strcpyc(str, "XX");
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const char *robuf5 = upb_string_getrobuf(str);
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assert(robuf5 == robuf);
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upb_string_unref(str);
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upb_string_unref(str2);
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}
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