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143 lines
3.7 KiB
143 lines
3.7 KiB
///
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/// nini - Nano INI parser
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///
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/// Written by MightyPork, 2018
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/// MIT license
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///
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#include "nini.h"
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enum nini_state {
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NINI_IDLE,
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NINI_SECTION,
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NINI_KEY,
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NINI_VALUE,
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NINI_COMMENT,
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};
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static struct {
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uint8_t section_i;
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char section[INI_KEY_MAX];
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uint8_t key_i;
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char key[INI_KEY_MAX];
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uint8_t value_i;
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char value[INI_VALUE_MAX];
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bool val_last_space;
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IniParserCallback cb;
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void *userdata;
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enum nini_state state;
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} nini;
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void ini_parse_begin(IniParserCallback callback, void *userData)
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{
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ini_parse_reset();
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nini.cb = callback;
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nini.userdata = userData;
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}
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void ini_parse(const char *data, size_t len)
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{
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for (; len > 0; len--) {
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char c = *data++;
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if (c == ' ' || c == '\t' || c == '\r' || c == '\n') {
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if (nini.state != NINI_VALUE && nini.state != NINI_COMMENT)
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continue;
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}
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switch (nini.state) {
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case NINI_IDLE:
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if (c == '[') {
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nini.state = NINI_SECTION;
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nini.section_i = 0;
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}
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else if (c == '#') {
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nini.state = NINI_COMMENT;
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}
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else {
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nini.state = NINI_KEY;
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nini.key_i = 0;
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nini.value_i = 0;
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nini.val_last_space = false;
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nini.key[nini.key_i++] = c;
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}
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break;
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case NINI_COMMENT:
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if (c == '\n' || c == '\r') {
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nini.state = NINI_IDLE;
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}
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break;
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case NINI_SECTION:
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if (c == ']') {
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nini.section[nini.section_i] = 0;
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nini.state = NINI_COMMENT; // discard to EOL
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break;
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}
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else if (nini.section_i < INI_KEY_MAX - 1) {
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nini.section[nini.section_i++] = c;
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}
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break;
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case NINI_KEY:
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if (c == '=') {
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nini.key[nini.key_i] = 0;
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nini.state = NINI_VALUE;
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}
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else if (nini.key_i < INI_KEY_MAX - 1) {
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nini.key[nini.key_i++] = c;
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}
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break;
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case NINI_VALUE:
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switch (c) {
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case ' ':
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case '\t':
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if (nini.value_i) nini.val_last_space = true;
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break;
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case '\r':
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case '\n':
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nini.value[nini.value_i] = 0;
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nini.state = NINI_IDLE;
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nini.cb(nini.section, nini.key, nini.value, nini.userdata);
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break;
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default:
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if (nini.val_last_space && nini.value_i < INI_VALUE_MAX - 1) {
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nini.value[nini.value_i++] = ' ';
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}
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if (nini.value_i < INI_VALUE_MAX - 1) {
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nini.value[nini.value_i++] = c;
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}
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nini.val_last_space = false;
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}
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}
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}
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}
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void *ini_parse_end(void)
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{
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if (nini.state == NINI_VALUE) {
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nini.value[nini.value_i] = 0;
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nini.state = NINI_IDLE;
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nini.cb(nini.section, nini.key, nini.value, nini.userdata);
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}
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return nini.userdata;
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}
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void ini_parse_file(const char *text, size_t len, IniParserCallback callback, void *userData)
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{
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ini_parse_begin(callback, userData);
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ini_parse(text, len);
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ini_parse_end();
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}
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void ini_parse_reset(void)
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{
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nini.state = NINI_IDLE;
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}
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