我一直在嘗試使用 chatGPT 提示在 C 中進行程式設計。
使用增量提示可以讓 chatGPT 3.5 做比預期更多的事情。
我想知道程式碼質量，並且希望獲得有關提示和程式碼的回饋。
線程安全代碼
靜態路徑
較大路徑字串的動態路徑分配
Linux / MacOs 的標準做法是動態分配（4095 / 1024 圖表路徑限制），而 Windows（260 路徑限制）是靜態分配。
我逐步建立查詢，否則 chatGPT 往往會忘記先前的請求變更。
最後，這看起來像是某種原始形式的元編碼，可以強制 LLM 產生所需的程式碼。
_query
LLM perplexity.ai
Modify code example
Portable Path Parsing and Validation Code in C
use thread safe function
use function pointer
strtok_s() for Windows
strtok_r() for linux
allocate INITIAL_BUFFER_SIZE 60 char static path_copy
declare pointer pfinal_path_copy initialize to path_copy
when necessary
dynamically allocate final_path_copy
pfinal_path_copy = final_path_copy
use single strcpy(pfinal_path_copy, path) function
程式碼一次成形一個功能以符合所需的風格
modify example replace 60 by equate
有些提示仍然黏著而沒有重複。早期添加了“no WSL cygwin”以提示輸入 Windows 作業系統特定代碼，然後被刪除。
write code example
parse path in portable way
linux windows MacOS
no WSL cygwin
產生的程式碼會在第一次編譯並執行。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h> // For _access() on Windows
#include <windows.h> // For Windows API
#else
#include <unistd.h> // For access() on Unix-like systems (Linux, macOS)
#include <sys/stat.h>
#endif
// Define a constant for the initial buffer size
#define INITIAL_BUFFER_SIZE 60
// Function to check if a path is valid
int path_validate(const char *path) {
#ifdef _WIN32
return _access(path, 0) == 0; // 0 means the file exists
#else
struct stat buffer;
return (stat(path, &buffer) == 0); // Returns 1 if valid, 0 if invalid
#endif
}
// Type definition for tokenization function pointer
typedef char* (*tokenizer_func)(char*, const char*, char**);
// Function to parse the path into components
void parse_path(const char *path) {
char path_copy[INITIAL_BUFFER_SIZE]; // Static buffer for initial use
char *final_path_copy = NULL; // Pointer for dynamic allocation
char *pfinal_path_copy = path_copy; // Pointer to point to either path_copy or final_path_copy
// Check if the input path length exceeds INITIAL_BUFFER_SIZE
if (strlen(path) + 1 > INITIAL_BUFFER_SIZE) {
final_path_copy = malloc(strlen(path) + 1); // Dynamically allocate memory
if (final_path_copy == NULL) {
fprintf(stderr, "Memory allocation failed.\n");
exit(EXIT_FAILURE);
}
pfinal_path_copy = final_path_copy; // Point to dynamically allocated memory
}
// Use a single strcpy function to copy the path into the appropriate buffer
strcpy(pfinal_path_copy, path); // Copy full path into the selected buffer
// Determine the separator based on the platform and assign the tokenizer function
const char *separator;
tokenizer_func tokenizer;
char *saveptr;
#ifdef _WIN32
separator = "\";
tokenizer = strtok_s; // Use strtok_s for Windows
#else
separator = "/";
tokenizer = strtok_r; // Use strtok_r for Linux
#endif
// Tokenize using the assigned tokenizer function
char *token = tokenizer(pfinal_path_copy, separator, &saveptr);
while (token != NULL) {
printf("Path component: %s\n", token);
token = tokenizer(NULL, separator, &saveptr); // Continue tokenizing
}
free(final_path_copy); // Free dynamically allocated memory after use (if allocated)
}
int main(int argc, char *argv[]) {
if (argc < 2) {
fprintf(stderr, "Usage: %s <path>\n", argv[0]);
return EXIT_FAILURE;
}
const char *path = argv[1];
// Validate the path using the new function name
if (path_validate(path)) {
printf("The path '%s' is valid.\n", path);
printf("Parsing components:\n");
parse_path(path);
} else {
printf("The path '%s' is invalid.\n", path);
}
return EXIT_SUCCESS;
}
## Unit test
Was created but not included here
## Performance
The entire exercise took 2:30 hour.
I have not tested the code on Windows or MacOS.
I'd like some feedback on code quality.
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