char *filename_completion_function(const char *text, int state) {
printf("\n[COMP] Entering: text='%s', state=%d, last_state=%d\n",
text, state, comp_state.last_state);
// 拦截空输入
if (text == NULL || *text == '\0') {
printf("用户未输入任何文本，不提供补全\n");
return NULL;
}
char current_dir[PATH_MAX];
char abs_path[PATH_MAX];
int reset_completion = 0;
int is_flash_mode = (strncmp(text, "flash:/", 7) == 0);
int is_f_prefix = (strncmp(text, "f", 1) == 0 && strncmp(text, "flash:/", 7) != 0);
// 核心优化：添加前缀匹配检查
int is_prefix_of_existing = 0;
if (comp_state.matches && comp_state.count > 0) {
for (int i = 0; i < comp_state.count; i++) {
if (comp_state.count == 1) {
is_prefix_of_existing = 0;
} else if (strncmp(text, comp_state.matches[i], strlen(text)) == 0) {
is_prefix_of_existing = 1;
break;
}
}
}
printf(" Text is prefix of existing matches, is_prefix_of_existing = %d\n", is_prefix_of_existing);
// 仅在需要时初始化新补全
if (state == 0) {
printf(" Starting new completion check\n");
// 获取当前工作目录
getcwd(current_dir, sizeof(current_dir));
snprintf(abs_path, sizeof(abs_path), "%s/%s", current_dir, text);
// 核心优化：检查是否是现有匹配项的前缀
if (is_prefix_of_existing) {
printf(" Text is prefix of existing matches, no reset needed\n");
reset_completion = 0;
} else {
// 原始重置逻辑
if (access(abs_path, F_OK) != 0) {
reset_completion = 1;
}
}
printf("\n111filename_completion_function: reset_completion = %d, abs_path = '%s'\n", reset_completion, abs_path);
char *tmp_base = NULL;
char *tmp_prefix = NULL;
int tmp_level = 0;
parse_input_text(text, &tmp_base, &tmp_prefix, &tmp_level);
printf("\n222filename_completion_function: text = '%s', tmp_base = '%s', tmp_prefix = '%s'\n",
text, tmp_base, tmp_prefix);
int same_reset = 0;
struct stat st_tmp;
char tmp_path[PATH_MAX];
if (comp_state.matches && comp_state.matches[0]) {
for (int i = 0; comp_state.matches[i]; i++) {
printf("\n333filename_completion_function: comp_state.matches[%d] = '%s'\n", i, comp_state.matches[i]);
if (strncmp(comp_state.matches[i], tmp_prefix, strlen(tmp_prefix)) == 0) {
char *old_base = comp_state.base_dir ? comp_state.base_dir : "";
snprintf(tmp_path, sizeof(tmp_path), "%s/%s%s", current_dir, old_base, comp_state.matches[i]);
printf("\n444filename_completion_function: tmp_path = '%s', current_dir = '%s', comp_state.matches[%d] = '%s'\n",
tmp_path, current_dir, i, comp_state.matches[i]);
if (stat(tmp_path, &st_tmp) == 0 && S_ISDIR(st_tmp.st_mode)) {
same_reset = 1;
printf("\nfilename_completion_function: same_reset = %d\n", same_reset);
break;
}
}
}
}
printf("\n555filename_completion_function: current_dir = '%s', text = '%s', abs_path = '%s', reset_completion = %d, same_reset = %d\n",
current_dir, text, abs_path, reset_completion, same_reset);
printf("\n666filename_completion_function: comp_state.persistent_path = '%s'\n", comp_state.persistent_path);
int same_context = is_same_completion_context(text);
printf(" Same context: %d\n", same_context);
// 核心优化：添加匹配数量和类型判断
int should_reset = 0;
if (is_prefix_of_existing) {
printf(" Using existing matches for prefix\n");
should_reset = 0;
// 新增：检查单目录匹配情况
if (comp_state.matches && comp_state.count == 1) {
char *single_match = comp_state.matches[0];
char full_path[PATH_MAX];
// 构建完整路径
if (comp_state.base_dir) {
snprintf(full_path, sizeof(full_path), "%s/%s", comp_state.base_dir, single_match);
} else {
snprintf(full_path, sizeof(full_path), "%s", single_match);
}
// 检查文件类型
struct stat st;
if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode)) {
printf(" Single directory match, forcing reset\n");
should_reset = 1;
}
}
} else if ((!same_context) || (reset_completion && same_reset) ||
(!comp_state.persistent_path || comp_state.persistent_path[0] == '\0')) {
should_reset = 1;
}
// 统一检查单目录匹配情况
if (!should_reset && comp_state.matches && comp_state.count == 1) {
char *single_match = comp_state.matches[0];
char full_path[PATH_MAX];
// 构建完整路径
if (comp_state.base_dir) {
snprintf(full_path, sizeof(full_path), "%s/%s", comp_state.base_dir, single_match);
} else {
snprintf(full_path, sizeof(full_path), "%s", single_match);
}
// 检查文件类型
struct stat st;
if (stat(full_path, &st) == 0) {
if (S_ISDIR(st.st_mode)) {
printf(" Single directory match, forcing reset\n");
should_reset = 1;
} else {
printf(" Single file match, no reset needed\n");
}
}
}
if (should_reset) {
reset_completion_state();
printf("\n -----------------common reset---------------\n");
char *current_base = NULL;
char *current_prefix = NULL;
int current_level = 0;
parse_input_text(text, ¤t_base, ¤t_prefix, ¤t_level);
printf("\n777filename_completion_function: current_base = '%s', current_prefix = '%s', current_level = %d\n",
current_base, current_prefix, current_level);
comp_state.base_dir = current_base;
comp_state.current_text = XSTRDUP(MTYPE_TMP, text);
comp_state.original_prefix = XSTRDUP(MTYPE_TMP, current_prefix);
comp_state.current_level = current_level;
comp_state.max_level = current_level + 3;
// 检查是否用户已经明确进入了子目录
int ends_with_slash = text[strlen(text) - 1] == '/';
if (ends_with_slash) {
comp_state.persistent_path = XSTRDUP(MTYPE_TMP, text);
comp_state.max_level = current_level + 3;
} else {
comp_state.persistent_path = XSTRDUP(MTYPE_TMP, current_base);
comp_state.max_level = current_level;
}
// 生成当前目录的补全项
if (is_flash_mode) {
comp_state.matches = generate_current_dir_paths("/mnt/switch/", text + 7, 1);
comp_state.flash_mode = 1;
} else if (is_f_prefix) {
comp_state.matches = generate_current_dir_paths(current_base, current_prefix, 1);
if (current_level == 0) {
if (comp_state.matches == NULL || comp_state.matches[0] == NULL) {
comp_state.base_dir = XSTRDUP(MTYPE_TMP, "flash:/");
comp_state.matches = generate_current_dir_paths("/mnt/switch/", text, 1);
comp_state.flash_mode = 1;
} else {
int count = 0;
while (comp_state.matches[count]) count++;
int flash_already_in_list = 0;
for (int i = 0; comp_state.matches[i]; i++) {
if (strncmp(comp_state.matches[i], "flash:/", 7) == 0) {
flash_already_in_list = 1;
break;
}
}
if (!flash_already_in_list && count < 1024 - 1) {
char **temp = (char **)XREALLOC(MTYPE_TMP, comp_state.matches, (count + 2) * sizeof(char*));
comp_state.matches = temp;
comp_state.matches[count] = XSTRDUP(MTYPE_TMP, "flash:/");
comp_state.matches[count + 1] = NULL;
if (comp_state.matches && comp_state.matches[0]) {
printf("\n flash: comp_state.matches = ");
for (int i = 0; comp_state.matches[i]; i++) {
printf("%s, ", comp_state.matches[i]);
}
printf("\n");
}
}
}
}
} else {
comp_state.matches = generate_current_dir_paths(current_base, current_prefix, current_level == 0);
}
comp_state.count = 0;
if (comp_state.matches) {
while (comp_state.matches[comp_state.count]) {
comp_state.count++;
}
printf(" Generated %d matches\n", comp_state.count);
} else {
comp_state.count = 0;
}
comp_state.last_state = -1; // 重置索引
}
}
printf("\n888filename_completion_function: comp_state.base_dir = '%s', comp_state.current_text = '%s', comp_state.original_prefix = '%s', comp_state.persistent_path = '%s'\n",
comp_state.base_dir, comp_state.current_text, comp_state.original_prefix, comp_state.persistent_path);
// 没有匹配项
if (!comp_state.matches || comp_state.count == 0) {
printf("[COMP] No matches found\n");
return NULL;
}
// 获取下一个匹配项
int next_index = (comp_state.last_state + 1) % comp_state.count;
comp_state.last_state = next_index;
char *match = comp_state.matches[next_index];
// 构建完整路径
char *full_path = NULL;
if (strncmp(match, "flash:/", 7) == 0) {
full_path = XSTRDUP(MTYPE_TMP, match);
} else if (comp_state.flash_mode) {
full_path = XCALLOC(MTYPE_TMP, strlen("flash:/") + strlen(match) + 2);
snprintf(full_path, strlen("flash:/") + strlen(match) + 2, "flash:/%s", match);
} else {
if (comp_state.base_dir && strlen(comp_state.base_dir) > 0) {
int base_len = strlen(comp_state.base_dir);
int needs_slash = base_len > 0 && comp_state.base_dir[base_len - 1] != '/';
full_path = XCALLOC(MTYPE_TMP, strlen(match) + base_len + 2);
if (needs_slash) {
snprintf(full_path, strlen(match) + base_len + 2, "%s/%s", comp_state.base_dir, match);
} else {
snprintf(full_path, strlen(match) + base_len + 2, "%s%s", comp_state.base_dir, match);
}
} else {
full_path = XSTRDUP(MTYPE_TMP, match);
}
}
printf("[COMP] Returning: '%s'\n", full_path);
return full_path;
}
这个代码的打印：
<dahua>dir f
【cmlsh_completion】text = f
[MATCHES] Called with text='f'
[COMP] Entering: text='f', state=0, last_state=-1
Text is prefix of existing matches, is_prefix_of_existing = 0
Starting new completion check
111filename_completion_function: reset_completion = 1, abs_path = '/mnt/switch/f'
222filename_completion_function: text = 'f', tmp_base = '', tmp_prefix = 'f'
555filename_completion_function: current_dir = '/mnt/switch', text = 'f', abs_path = '/mnt/switch/f', reset_completion = 1, same_reset = 0
666filename_completion_function: comp_state.persistent_path = '(null)'
Same context: 0
-----------------common reset---------------
777filename_completion_function: current_base = '', current_prefix = 'f', current_level = 0
[generate] Scanning directory: '.' with prefix: 'f'
跳过软链接: main_uImage
[generate] Found 1 matches.
generate_current_dir_paths: matches = fa/,
flash: comp_state.matches = fa/, flash:/,
Generated 2 matches
888filename_completion_function: comp_state.base_dir = '', comp_state.current_text = 'f', comp_state.original_prefix = 'f', comp_state.persistent_path = ''
[COMP] Returning: 'fa/'
[MATCHES] Returning single match: 'fa/'
a/
【cmlsh_completion】text = fa/
[MATCHES] Called with text='fa/'
[COMP] Entering: text='fa/', state=0, last_state=0
Text is prefix of existing matches, is_prefix_of_existing = 1
Starting new completion check
Text is prefix of existing matches, no reset needed
111filename_completion_function: reset_completion = 0, abs_path = '/mnt/switch/fa/'
222filename_completion_function: text = 'fa/', tmp_base = 'fa/', tmp_prefix = ''
333filename_completion_function: comp_state.matches[0] = 'fa/'
444filename_completion_function: tmp_path = '/mnt/switch/fa/', current_dir = '/mnt/switch', comp_state.matches[0] = 'fa/'
filename_completion_function: same_reset = 1
555filename_completion_function: current_dir = '/mnt/switch', text = 'fa/', abs_path = '/mnt/switch/fa/', reset_completion = 0, same_reset = 1
666filename_completion_function: comp_state.persistent_path = ''
is_same_completion_context: text = fa/, temp_base = fa/, current_level = 1
is_same_completion_context: same_path=1, within_level=0
Same context: 0
Using existing matches for prefix
888filename_completion_function: comp_state.base_dir = '', comp_state.current_text = 'f', comp_state.original_prefix = 'f', comp_state.persistent_path = ''
[COMP] Returning: 'flash:/'
[MATCHES] Returning single match: 'flash:/' lash:/e
【cmlsh_completion】text = flash:/e
[MATCHES] Called with text='flash:/e'
[COMP] Entering: text='flash:/e', state=0, last_state=1
Text is prefix of existing matches, is_prefix_of_existing = 0
Starting new completion check
111filename_completion_function: reset_completion = 1, abs_path = '/mnt/switch/flash:/e'
222filename_completion_function: text = 'flash:/e', tmp_base = '', tmp_prefix = 'e'
333filename_completion_function: comp_state.matches[0] = 'fa/'
333filename_completion_function: comp_state.matches[1] = 'flash:/'
555filename_completion_function: current_dir = '/mnt/switch', text = 'flash:/e', abs_path = '/mnt/switch/flash:/e', reset_completion = 1, same_reset = 0
666filename_completion_function: comp_state.persistent_path = ''
is_same_completion_context: text = flash:/e, temp_base = , current_level = 0
is_same_completion_context: same_path=1, within_level=1
Same context: 1
-----------------common reset---------------
777filename_completion_function: current_base = '', current_prefix = 'e', current_level = 0
[generate] Scanning directory: '/mnt/switch/' with prefix: 'e'
跳过软链接: main_uImage
[generate] Found 2 matches.
generate_current_dir_paths: matches = ea.txt, etc/,
Generated 2 matches
888filename_completion_function: comp_state.base_dir = '', comp_state.current_text = 'flash:/e', comp_state.original_prefix = 'e', comp_state.persistent_path = ''
[COMP] Returning: 'flash:/ea.txt'
[MATCHES] Returning single match: 'flash:/ea.txt'
a.txt
【cmlsh_completion】text = flash:/ea.txt
[MATCHES] Called with text='flash:/ea.txt'
[COMP] Entering: text='flash:/ea.txt', state=0, last_state=0
Text is prefix of existing matches, is_prefix_of_existing = 0
Starting new completion check
111filename_completion_function: reset_completion = 1, abs_path = '/mnt/switch/flash:/ea.txt'
222filename_completion_function: text = 'flash:/ea.txt', tmp_base = ''
Username:
我最开始是输入是f，然后补全出flash:/后，我追加了个e，generate_current_dir_paths: matches = ea.txt, etc/,然后tab去补全，
正常是要显示的是flash:/ea.txt，flash:/etc/循环显示，但是111filename_completion_function: reset_completion = 1, abs_path = '/mnt/switch/flash:/ea.txt'显示拼接异常了，显示text = 'flash:/ea.txt'，实际上虚拟的flash:/就是/mnt/switch/实际路径，这个要如何修复？在我给出的代码的基础上优化，不要新增函数，也不要很大的改动
本文探讨了在C/C++中使用预处理器宏定义来适应Unicode或多字节字符集的方法。详细介绍了如何通过配置项目的预处理器定义及字符集选项来实现这一目标。
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