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config: use getline idiomatically
getline(3) contains an example program at the end, showing its usage. A few other changes have also been made.
This commit is contained in:
Pranjal Kole
parent
65b5469e86
commit
06fdebbbcb
1 changed files with 72 additions and 66 deletions
138
config.c
138
config.c
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@ -724,7 +724,7 @@ value_to_pt_or_px(struct context *ctx, struct pt_or_px *res)
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long value = strtol(s, &end, 10);
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if (!(errno == 0 && end == s + len - 2)) {
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LOG_CONTEXTUAL_ERR("invalid px value (must be on the form 12px)");
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LOG_CONTEXTUAL_ERR("invalid px value (must be of the form 12px)");
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return false;
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}
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res->pt = 0;
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@ -753,7 +753,7 @@ value_to_fonts(struct context *ctx)
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font = strtok(NULL, ","))
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{
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/* Trim spaces, strictly speaking not necessary, but looks nice :) */
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while (*font != '\0' && isspace(*font))
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while (isspace(font[0]))
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font++;
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if (font[0] == '\0')
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@ -1162,13 +1162,14 @@ parse_section_url(struct context *ctx)
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{
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/* Strip leading whitespace */
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while (isspace(*prot))
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while (isspace(prot[0]))
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prot++;
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/* Strip trailing whitespace */
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size_t len = strlen(prot);
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while (len > 0 && isspace(prot[len - 1]))
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prot[--len] = '\0';
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while (isspace(prot[len - 1]))
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len--;
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prot[len] = '\0';
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size_t chars = mbstowcs(NULL, prot, 0);
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if (chars == (size_t)-1) {
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@ -2332,8 +2333,8 @@ parse_key_value(char *kv, const char **section, const char **key, const char **v
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{
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bool section_is_needed = section != NULL;
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/*strip leading whitespace*/
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while (*kv && isspace(*kv))
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/* Strip leading whitespace */
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while (isspace(kv[0]))
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++kv;
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if (section_is_needed)
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@ -2346,6 +2347,12 @@ parse_key_value(char *kv, const char **section, const char **key, const char **v
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*value = NULL;
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size_t kvlen = strlen(kv);
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/* Strip trailing whitespace */
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while (isspace(kv[kvlen - 1]))
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kvlen--;
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kv[kvlen] = '\0';
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for (size_t i = 0; i < kvlen; ++i) {
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if (kv[i] == '.' && section_is_needed) {
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section_is_needed = false;
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@ -2358,9 +2365,8 @@ parse_key_value(char *kv, const char **section, const char **key, const char **v
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*key = &kv[i + 1];
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} else if (kv[i] == '=') {
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kv[i] = '\0';
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if (i == kvlen - 1)
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return false;
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*value = &kv[i + 1];
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if (i != kvlen - 1)
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*value = &kv[i + 1];
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break;
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}
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}
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@ -2370,26 +2376,18 @@ parse_key_value(char *kv, const char **section, const char **key, const char **v
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/* Strip trailing whitespace from key (leading stripped earlier) */
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{
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xassert(!isspace(**key));
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xassert(!isspace(*key[0]));
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char *end = (char *)*key + strlen(*key) - 1;
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while (isspace(*end))
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while (isspace(end[0]))
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end--;
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*(end + 1) = '\0';
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end[1] = '\0';
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}
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/* Strip leading+trailing whitespace from valueue */
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{
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while (isspace(**value))
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++*value;
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/* Strip leading whitespace from value (trailing stripped earlier) */
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while (isspace(*value[0]))
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++*value;
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if (*value[0] != '\0') {
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char *end = (char *)*value + strlen(*value) - 1;
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while (isspace(*end))
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end--;
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*(end + 1) = '\0';
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}
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}
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return true;
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}
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@ -2451,12 +2449,14 @@ parse_config_file(FILE *f, struct config *conf, const char *path, bool errors_ar
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char *_line = NULL;
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size_t count = 0;
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bool ret = true;
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#define error_or_continue() \
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{ \
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if (errors_are_fatal) \
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goto err; \
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else \
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if (errors_are_fatal) { \
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ret = false; \
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goto done; \
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} else \
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continue; \
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}
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@ -2471,50 +2471,48 @@ parse_config_file(FILE *f, struct config *conf, const char *path, bool errors_ar
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};
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struct context *ctx = &context; /* For LOG_AND_*() */
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while (true) {
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errno = 0;
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errno = 0;
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ssize_t len;
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while ((len = getline(&_line, &count, f)) != -1) {
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context.key = NULL;
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context.value = NULL;
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context.lineno++;
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ssize_t ret = getline(&_line, &count, f);
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if (ret < 0) {
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if (errno != 0) {
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LOG_AND_NOTIFY_ERRNO("failed to read from configuration");
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if (errors_are_fatal)
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goto err;
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}
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break;
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}
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char *line = _line;
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/* Strip leading whitespace */
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char *line = _line;
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{
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while (isspace(*line))
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line++;
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if (line[0] != '\0') {
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char *end = line + strlen(line) - 1;
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while (isspace(*end))
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end--;
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*(end + 1) = '\0';
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}
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while (isspace(line[0])) {
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line++;
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len--;
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}
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/* Empty line, or comment */
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if (line[0] == '\0' || line[0] == '#')
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continue;
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/* Strip the trailing newline - may be absent on the last line */
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if (line[len - 1] == '\n')
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line[--len] = '\0';
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/* Split up into key/value pair + trailing comment separated by blank */
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char *key_value = line;
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char *comment = line;
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while (comment[0] != '\0') {
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const char c = comment[0];
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comment++;
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if (isblank(c) && comment[0] == '#') {
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comment[0] = '\0'; /* Terminate key/value pair */
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comment++;
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char *kv_trailing = &line[len - 1];
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char *comment = &line[1];
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while (comment[1] != '\0') {
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if (isblank(comment[0]) && comment[1] == '#') {
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comment[1] = '\0'; /* Terminate key/value pair */
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kv_trailing = comment++;
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break;
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}
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comment++;
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}
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comment++;
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/* Strip trailing whitespace */
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while (isspace(kv_trailing[0]))
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kv_trailing--;
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kv_trailing[1] = '\0';
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/* Check for new section */
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if (key_value[0] == '[') {
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@ -2522,28 +2520,36 @@ parse_config_file(FILE *f, struct config *conf, const char *path, bool errors_ar
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if (key_value[0] == ']') {
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LOG_CONTEXTUAL_ERR("empty section name");
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section = SECTION_COUNT;
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error_or_continue();
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}
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context.section = key_value;
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char *end = strchr(key_value, ']');
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if (end == NULL) {
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context.section = key_value;
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LOG_CONTEXTUAL_ERR("syntax error: no closing ']'");
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context.section = section_name;
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section = SECTION_COUNT;
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error_or_continue();
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}
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end[0] = '\0';
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if (end[1] != '\0') {
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context.section = key_value;
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LOG_CONTEXTUAL_ERR("section declaration contains trailing "
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"characters");
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context.section = section_name;
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section = SECTION_COUNT;
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error_or_continue();
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}
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section = str_to_section(key_value);
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if (section == SECTION_COUNT) {
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context.section = key_value;
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LOG_CONTEXTUAL_ERR("invalid section name: %s", key_value);
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context.section = section_name;
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error_or_continue();
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}
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@ -2563,13 +2569,11 @@ parse_config_file(FILE *f, struct config *conf, const char *path, bool errors_ar
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if (!parse_key_value(key_value, NULL, &context.key, &context.value)) {
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LOG_CONTEXTUAL_ERR("syntax error: key/value pair has no %s",
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context.key == NULL ? "key" : "value");
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if (errors_are_fatal)
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goto err;
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break;
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error_or_continue();
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}
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LOG_DBG("section=%s, key='%s', value='%s', comment='%s'",
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section_info[section].name, key, value, comment);
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section_info[section].name, context.key, context.value, comment);
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xassert(section >= 0 && section < SECTION_COUNT);
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@ -2580,14 +2584,16 @@ parse_config_file(FILE *f, struct config *conf, const char *path, bool errors_ar
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error_or_continue();
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}
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free(section_name);
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free(_line);
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return true;
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if (errno != 0) {
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LOG_AND_NOTIFY_ERRNO("failed to read from configuration");
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if (errors_are_fatal)
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ret = false;
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}
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err:
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done:
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free(section_name);
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free(_line);
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return false;
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return ret;
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}
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static char *
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