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mraa.c: make lookup functions more robust with null pointer checks

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Signed-off-by: Tapani Utriainen <tapani@technexion.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Tapani Utriainen
2017-05-16 20:09:50 +08:00
committed by Brendan Le Foll
parent dc1255ad75
commit 9479843cde
1 changed files with 8 additions and 8 deletions
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16
src/mraa.c
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@@ -828,12 +828,12 @@ mraa_gpio_lookup(const char* pin_name)
return -1;
}
if (strlen(pin_name) == 0) {
if (pin_name == NULL || strlen(pin_name) == 0) {
return -1;
}
for (i = 0; i < plat->gpio_count; i++) {
if (strcmp(pin_name, plat->pins[i].name) == 0) {
if (plat->pins[i].name != NULL && strcmp(pin_name, plat->pins[i].name) == 0) {
return plat->pins[i].gpio.pinmap;
}
}
@@ -849,12 +849,12 @@ mraa_i2c_lookup(const char* i2c_name)
return -1;
}
if (strlen(i2c_name) == 0) {
if (i2c_name == NULL || strlen(i2c_name) == 0) {
return -1;
}
for (i = 0; i < plat->i2c_bus_count; i++) {
if (strcmp(i2c_name, plat->i2c_bus[i].name) == 0) {
if (plat->i2c_bus[i].name != NULL && strcmp(i2c_name, plat->i2c_bus[i].name) == 0) {
return plat->i2c_bus[i].bus_id;
}
}
@@ -870,12 +870,12 @@ mraa_spi_lookup(const char* spi_name)
return -1;
}
if (strlen(spi_name) == 0) {
if (spi_name == NULL || strlen(spi_name) == 0) {
return -1;
}
for (i = 0; i < plat->spi_bus_count; i++) {
if (strcmp(spi_name, plat->spi_bus[i].name) == 0) {
if (plat->spi_bus[i].name != NULL && strcmp(spi_name, plat->spi_bus[i].name) == 0) {
return plat->spi_bus[i].bus_id;
}
}
@@ -891,12 +891,12 @@ mraa_pwm_lookup(const char* pwm_name)
return -1;
}
if (strlen(pwm_name) == 0) {
if (pwm_name == NULL || strlen(pwm_name) == 0) {
return -1;
}
for (i = 0; i < plat->pwm_dev_count; i++) {
if (strcmp(pwm_name, plat->pwm_dev[i].name) == 0) {
if (plat->pwm_dev[i].name != NULL && strcmp(pwm_name, plat->pwm_dev[i].name) == 0) {
return plat->pwm_dev[i].index;
}
}