com_slave/read_config.c

#include "read_config.h"
#include <string.h>
int open_config_file(simp_config_t *config, const char *filename)
{
    config->fp = fopen(filename, "rw+");
    if (config->fp == NULL)
    {
        perror("fopen");
        return -1;
    }
    return 0;
}

void close_config_file(simp_config_t *config)
{
    if (config->fp != NULL)
    {
        fclose(config->fp);
        config->fp = NULL;
    }
}

int read_config_file_u32(simp_config_t *config, const char *key, u32 *value)
{
    char line[MAX_CONFIG_LINE_LEN];
    char *p;
    // 移动到文件头
    fseek(config->fp, 0, SEEK_SET);
    while (fgets(line, sizeof(line), config->fp) != NULL)
    {
        if (line[0] == '#' || line[0] == '\n')
        {
            continue;
        }
        // key:value
        p = strstr(line, key);
        if (p == NULL)
        {
            continue;
        }
        p = strchr(line, ':');
        if (p == NULL)
        {
            continue;
        }
        // 去掉前面的空格
        while (*p == ' ')
        {
            p++;
        }
        sscanf(p + 1, "%u", value);
        return 0;
    }
    return -1;
}

int read_config_file_string(simp_config_t *config, const char *key, char *value, u32 len)
{
    char line[MAX_CONFIG_LINE_LEN];
    char *p;
    // 移动到文件头
    fseek(config->fp, 0, SEEK_SET);
    while (fgets(line, sizeof(line), config->fp) != NULL)
    {
        if (line[0] == '#' || line[0] == '\n')
        {
            continue;
        }
        // key:value
        p = strstr(line, key);
        if (p == NULL)
        {
            continue;
        }
        p = strchr(line, ':');
        if (p == NULL)
        {
            continue;
        }
        p++;
        // 去掉前面的空格
        while (*p == ' ')
        {
            p++;
        }
        if (*p == '"')
        {

            p++;
        }
        while (*p != '\n' && *p != '\0' && *p != '"')
        {
            *value = *p;
            value++;
            p++;
        }
        *value = '\0';
        return 0;
    }
    return -1;
}

int read_config_file_float(simp_config_t *config, const char *key, float *value)
{
    char line[MAX_CONFIG_LINE_LEN];
    char *p;
    // 移动到文件头
    fseek(config->fp, 0, SEEK_SET);
    while (fgets(line, sizeof(line), config->fp) != NULL)
    {
        if (line[0] == '#' || line[0] == '\n')
        {
            continue;
        }
        // key:value
        p = strstr(line, key);
        if (p == NULL)
        {
            continue;
        }
        p = strchr(line, ':');
        if (p == NULL)
        {
            continue;
        }
        // 去掉前面的空格
        while (*p == ' ')
        {
            p++;
        }

        sscanf(p + 1, "%f", value);
        return 0;
    }
    return -1;
}

#if 0

int main(void)
{

    simp_config_t config;
    int ret = 0;
    ret = open_config_file(&config, "config.temp");
    if (ret)
    {
        printf("open config file failed\n");
        return -1;
    }
    char uart_dev[MAX_CONFIG_LINE_LEN];
    ret = read_config_file_string(&config, "uart_device", uart_dev, MAX_CONFIG_LINE_LEN);
    if (ret)
    {
        printf("read uart_device failed\n");
        return -1;
    }
    printf("uart_device:%s\n", uart_dev);

    u32 baudrate;
    ret = read_config_file_u32(&config, "uart_baudrate", &baudrate);
    if (ret)
    {
        printf("read baudrate failed\n");
        return -1;
    }
    printf("baudrate:%u\n", baudrate);

    float uart_float;
    ret = read_config_file_float(&config, "uart_float", &uart_float);
    if (ret)
    {
        printf("read uart_float failed\n");
        return -1;
    }
    printf("uart_float:%f\n", uart_float);

    close_config_file(&config);
}

#endif