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Implement text path trimming for shorter paths.
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6b0fb62c47
commit
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@ -14,8 +14,33 @@
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#include "common/logging/log.h"
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#include "common/logging/text_formatter.h"
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#include "common/string_util.h"
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namespace Log {
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// TODO(bunnei): This should be moved to a generic path manipulation library
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const char* TrimSourcePath(const char* path, const char* root) {
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const char* p = path;
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while (*p != '\0') {
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const char* next_slash = p;
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while (*next_slash != '\0' && *next_slash != '/' && *next_slash != '\\') {
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++next_slash;
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}
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bool is_src = Common::ComparePartialString(p, next_slash, root);
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p = next_slash;
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if (*p != '\0') {
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++p;
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}
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if (is_src) {
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path = p;
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}
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}
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return path;
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}
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void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len) {
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unsigned int time_seconds = static_cast<unsigned int>(entry.timestamp.count() / 1000000);
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unsigned int time_fractional = static_cast<unsigned int>(entry.timestamp.count() % 1000000);
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@ -25,7 +50,7 @@ void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len) {
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snprintf(out_text, text_len, "[%4u.%06u] %s <%s> %s: %s",
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time_seconds, time_fractional, class_name, level_name,
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entry.location.c_str(), entry.message.c_str());
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TrimSourcePath(entry.location.c_str()), entry.message.c_str());
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}
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static void ChangeConsoleColor(Level level) {
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@ -12,6 +12,18 @@ namespace Log {
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class Logger;
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struct Entry;
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/**
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* Attempts to trim an arbitrary prefix from `path`, leaving only the part starting at `root`. It's
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* intended to be used to strip a system-specific build directory from the `__FILE__` macro,
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* leaving only the path relative to the sources root.
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*
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* @param path The input file path as a null-terminated string
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* @param root The name of the root source directory as a null-terminated string. Path up to and
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* including the last occurence of this name will be stripped
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* @return A pointer to the same string passed as `path`, but starting at the trimmed portion
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*/
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const char* TrimSourcePath(const char* path, const char* root = "src");
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/// Formats a log entry into the provided text buffer.
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void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len);
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/// Formats and prints a log entry to stderr.
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@ -115,4 +115,19 @@ inline std::string UTF8ToTStr(const std::string& str)
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#endif
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/**
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* Compares the string defined by the range [`begin`, `end`) to the null-terminated C-string
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* `other` for equality.
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*/
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template <typename InIt>
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bool ComparePartialString(InIt begin, InIt end, const char* other) {
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for (; begin != end && *other != '\0'; ++begin, ++other) {
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if (*begin != *other) {
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return false;
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}
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}
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// Only return true if both strings finished at the same point
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return (begin == end) == (*other == '\0');
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}
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}
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