source: Daodan/src/Inifile_Reader.c@ 1024

#include <stdio.h>
#include <stdlib.h>
#include "stdint.h"
#include <string.h>
#include <ctype.h>

#include "Inifile_Reader.h"

static char* strtrim(char* string)
{
        while (isspace(*string))
                string++;
        for (int i = strlen(string) - 1; i >= 0; i--)
        {
                if (isspace(string[i]))
                {
                        string[i] = 0;
                }
                else
                {
                        break;
                }
        }
        return string;
}

static char* newlines(char* string)
{
        for (char* i = string + strlen(string) - 1; i >= string; i--)
        {
                if ((*i == '\\') && (*(i+1) == 'n'))
                {
                        *i = '\n';
                        memmove(i+1, i+2, strlen(i+1));
                }
        }
        return string;
}

bool Inifile_Read(const char* filename, inifile_callback callback)
{
        FILE* fp = fopen(filename, "r");

        char inisection[30] = "";
        char option[30] = "";
        char value[200] = "";

        char readbuf[4096] = "";
        char* readptr;

        bool success = true;
        
        if (!fp)
                return false;
        
        while ((readptr = fgets(readbuf, sizeof(readbuf), fp))) // Loop through each line.
        {
                while (isspace(readptr[0])) // Skip whitespace.
                        readptr++;

                if (readptr[0] == '\0' || readptr[0] == '#' || readptr[0] == '!') // Skip empty lines and comments.
                        continue;

                if (sscanf(readptr, "[%[^]]]", inisection) == 1)
                {
                }
                else if (sscanf(readptr, "%[^=]=%[^\n]", option, value) == 2)
                {
                        callback(inisection, strtrim(option), newlines(strtrim(value)));
                }
                else
                {
                        success = false;
                }
        }
        
        fclose(fp);
        return success;
}