A small table can keep validation limits close to the code that applies them.

Table Limits

table_limits.c
#include <stdio.h>

int withinLimits(int minValue, int maxValue, int value) {
    if (value < minValue) {
        return 0;
    }
    if (value > maxValue) {
        return 0;
    }
    return 1;
}

int main(void) {
    int ruleIndex = ;
    int value = 45;
    int limits[3][2] = {
        {0, 10},
        {20, 60},
        {70, 90}
    };

    int minValue = limits[ruleIndex][0];
    int maxValue = limits[ruleIndex][1];
    int ok = withinLimits(minValue, maxValue, value);

    printf("ruleIndex=%d min=%d max=%d value=%d ok=%d\n", ruleIndex, minValue, maxValue, value, ok);
    return 0;
}
#include <stdio.h>

int withinLimits(int minValue, int maxValue, int value) {
    if (value < minValue) {
        return 0;
    }
    if (value > maxValue) {
        return 0;
    }
    return 1;
}

int main(void) {
    int ruleIndex = ;
    int value = 45;
    int limits[3][2] = {
        {0, 10},
        {20, 60},
        {70, 90}
    };

    int minValue = limits[ruleIndex][0];
    int maxValue = limits[ruleIndex][1];
    int ok = withinLimits(minValue, maxValue, value);

    printf("ruleIndex=%d min=%d max=%d value=%d ok=%d\n", ruleIndex, minValue, maxValue, value, ok);
    return 0;
}
#include <stdio.h>

int withinLimits(int minValue, int maxValue, int value) {
    if (value < minValue) {
        return 0;
    }
    if (value > maxValue) {
        return 0;
    }
    return 1;
}

int main(void) {
    int ruleIndex = ;
    int value = 45;
    int limits[3][2] = {
        {0, 10},
        {20, 60},
        {70, 90}
    };

    int minValue = limits[ruleIndex][0];
    int maxValue = limits[ruleIndex][1];
    int ok = withinLimits(minValue, maxValue, value);

    printf("ruleIndex=%d min=%d max=%d value=%d ok=%d\n", ruleIndex, minValue, maxValue, value, ok);
    return 0;
}
rule table Each row stores the minimum and maximum accepted by one validation rule.
selected rule The selected row drives the same validation function without duplicating branches.