diff options
Diffstat (limited to 'src/ini.c')
| -rw-r--r-- | src/ini.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/ini.c b/src/ini.c new file mode 100644 index 0000000..e4e734d --- /dev/null +++ b/src/ini.c @@ -0,0 +1,188 @@ +#include "ini.h" +#include <ctype.h> +#include <stdlib.h> +#include <string.h> + +enum parse_state { + START, + READING_KEY, + SEEKING_EQ, + SEEKING_VALUE, + READING_VALUE, + READING_SECTION_KEY, + SEEKING_SECTION_VALUE, + SEEKING_END_SECTION, + READING_SECTION_VALUE, + ACCEPT, + REJECT +}; + +int parse_ini_file(FILE* f, char *out_key, size_t key_size, char *out_value, size_t value_size) +{ + char buf[512]; + while(fgets(&buf[0], sizeof(buf), f)) { + int type = parse_ini_str(&buf[0], out_key, key_size, out_value, value_size); + if(type != 0) { + return type; + } + } + return 0; +} + +int parse_ini_str(const char* str, char *out_key, size_t key_size, char *out_value, size_t value_size) +{ + /* ignore comments */ + if(*str == ';') { + out_key[0] = 0; + out_value[0] = 0; + return INI_UNKNOWN; + } + + const char *key_start = 0; + size_t key_len = 0; + const char *value_start = 0; + size_t value_len = 0; + + int type = INI_UNKNOWN; + enum parse_state state = START; + char quote = 0; + char c = 0; + + do { + c = *str; + switch(state) { + case START: + if(c == '[') { + type = INI_SECTION; + state = READING_SECTION_KEY; + } else if(c != '=') { + type = INI_VALUE; + state = READING_KEY; + key_start = str; + ++key_len; + } else { + state = REJECT; + } + break; + case READING_KEY: + if(isspace(c)) { + state = SEEKING_EQ; + } else if(c == '=') { + state = SEEKING_VALUE; + } else { + ++key_len; + } + break; + case SEEKING_EQ: + if(c == '=') { + state = SEEKING_VALUE; + } else if(!isspace(c)) { + state = REJECT; + } + break; + case SEEKING_VALUE: + if(c == '"' || c == '\'') { + if(!value_start) { + quote = c; + state = READING_VALUE; + } else { + state = REJECT; + } + } else if(!isspace(c)) { + value_start = str; + ++value_len; + state = READING_VALUE; + } + break; + case READING_VALUE: + if(quote == 0 && isspace(c)) { + state = ACCEPT; + } else if(quote && c == quote) { + state = ACCEPT; + } else if(c == 0) { + state = ACCEPT; + } else if(c) { + if(!value_start) { + value_start = str; + } + ++value_len; + } else { + state = REJECT; + } + break; + case READING_SECTION_KEY: + if(isspace(c)) { + state = SEEKING_SECTION_VALUE; + } else if(c == ']') { + state = ACCEPT; + } else { + if(!key_start) { + key_start = str; + } + ++key_len; + } + break; + case SEEKING_SECTION_VALUE: + if(c == '"' || c == '\'') { + quote = c; + state = READING_SECTION_VALUE; + } else if(c == ']') { + state = ACCEPT; + } else if(!isspace(c)) { + state = REJECT; + } + break; + case READING_SECTION_VALUE: + if(quote == 0 && isspace(c)) { + state = SEEKING_END_SECTION; + } else if(quote && c == quote) { + state = SEEKING_END_SECTION; + } else if(c == ']') { + state = ACCEPT; + } else if(c) { + if(!value_start) { + value_start = str; + } + ++value_len; + } else { + state = REJECT; + } + break; + case SEEKING_END_SECTION: + if(c == ']') { + state = ACCEPT; + } else if(!isspace(c)) { + state = REJECT; + } + break; + case ACCEPT: + if(c != 0 && !isspace(c)) { + state = REJECT; + } + break; + case REJECT: + return 0; + break; + } + ++str; + } while(c != 0 && state != REJECT); + + if(state == ACCEPT) { + if(key_len >= key_size) { + key_len = key_size - 1; + } + if(value_len >= value_size) { + value_len = value_size - 1; + } + memcpy(out_key, key_start, key_len); + memcpy(out_value, value_start, value_len); + out_key[key_len] = 0; + out_value[value_len] = 0; + return type; + } else { + out_key[0] = 0; + out_value[0] = 0; + } + + return INI_UNKNOWN; +} |