printf/printfParams.c

#include "ft_printf_internal.h"

int consumeFlags(struct printf_data* params)
{
    int flags;
    int status;

    status = 1;
    flags = 0;
    while (*params->inputBuffer && status)
    {
        if (*params->inputBuffer == '#')
            flags |= PRINTF_FLAG_ALTERNATE_FORM;
        else if (*params->inputBuffer == '0')
            flags |= PRINTF_FLAG_ZERO_PAD;
        else if (*params->inputBuffer == '-')
            flags |= PRINTF_FLAG_LEFT_PADDING;
        else if (*params->inputBuffer == ' ')
            flags |= PRINTF_FLAG_SIGNED_PAD;
        else if (*params->inputBuffer == '+')
            flags |= PRINTF_FLAG_SIGNED_SIGN;
        else if (*params->inputBuffer == '\'')
            flags |= PRINTF_FLAG_THD_GROUP;
        else
            status = 0;
        if (status)
            params->inputBuffer++;
    }
    return flags;
}

int consumeNumber(struct printf_data* params)
{
    int result;

    result = 0;
    while (*params->inputBuffer >= '0' && *params->inputBuffer <= '9')
    {
        result = result * 10 + (*params->inputBuffer - '0');
        params->inputBuffer++;
    }
    return result;
}

printf_typeName consumeTypename(struct printf_data* data)
{
    if (*data->inputBuffer == '%')
        return printf_percent;
    if (*data->inputBuffer == 'd' || *data->inputBuffer == 'i')
        return printf_di;
    if (*data->inputBuffer == 'u')
        return printf_u;
    if (*data->inputBuffer == 'o')
        return printf_o;
    if (*data->inputBuffer == 'x')
        return printf_x;
    if (*data->inputBuffer == 'X')
        return printf_X;
    if (*data->inputBuffer == 'c')
        return printf_c;
    if (*data->inputBuffer == 'p')
        return printf_p;
    if (*data->inputBuffer == 'n')
        return printf_n;
    if (*data->inputBuffer == 'm')
        return printf_m;
    if (*data->inputBuffer == 's')
        return printf_s;
    if (*data->inputBuffer == 'f')
        return printf_f;
    if (*data->inputBuffer == 'F')
        return printf_F;
    if (*data->inputBuffer == 'a')
        return printf_a;
    if (*data->inputBuffer == 'A')
        return printf_A;
    return NULL;
}

int expandParams(struct printf_data* params, va_list args)
{
    struct printf_format_params format;
    char* buffer = params->inputBuffer;

    format.flags = consumeFlags(params);
    format.width = -1;
    format.precision = -1;
    if (*params->inputBuffer >= '0' && *params->inputBuffer <= '9')
        format.width = consumeNumber(params);
    if (*params->inputBuffer == '.')
    {
        ++params->inputBuffer;
        format.precision = consumeNumber(params);
    }
    /* LENGTH MODIFIERS NOT SUPPORTED */
    format.typeName = consumeTypename(params);
    if (format.typeName)
    {
        params->inputBuffer++;
        return format.typeName(params, &format, args);
    }
    params->inputBuffer = buffer;
    return printf_percent(params, &format, args);
}