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conversions: Add string to signed integer conversion functions

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Change-Id: Id603b0b03b78eb84c7fca030a08b343c0d5973f9
18.0
Kevin Harwell 5 years ago committed by Friendly Automation
parent c83e4821e5
commit ec03909831
3 changed files with 257 additions and 1 deletions
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54
include/asterisk/conversions.h
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@ -25,6 +25,24 @@
#include <stdint.h>
/*!
* \brief Convert the given string to a signed integer
*
* This function will return failure for the following reasons:
*
* The given string to convert is NULL
* The given string to convert is empty.
* The given string to convert contains non numeric values
* Once converted the number is out of range (less than INT_MIN
* or greater than INT_MAX)
*
* \param str The string to convert
* \param res [out] The converted value
*
* \returns -1 if it fails to convert, 0 on success
*/
int ast_str_to_int(const char *str, int *res);
/*!
* \brief Convert the given string to an unsigned integer
*
@ -43,6 +61,24 @@
*/
int ast_str_to_uint(const char *str, unsigned int *res);
/*!
* \brief Convert the given string to a signed long
*
* This function will return failure for the following reasons:
*
* The given string to convert is NULL
* The given string to convert is empty.
* The given string to convert contains non numeric values
* Once converted the number is out of range (less than LONG_MIN
* or greater than LONG_MAX)
*
* \param str The string to convert
* \param res [out] The converted value
*
* \returns -1 if it fails to convert, 0 on success
*/
int ast_str_to_long(const char *str, long *res);
/*!
* \brief Convert the given string to an unsigned long
*
@ -61,6 +97,24 @@ int ast_str_to_uint(const char *str, unsigned int *res);
*/
int ast_str_to_ulong(const char *str, unsigned long *res);
/*!
* \brief Convert the given string to a signed max size integer
*
* This function will return failure for the following reasons:
*
* The given string to convert is NULL
* The given string to convert is empty.
* The given string to convert contains non numeric values
* Once converted the number is out of range (less than INTMAX_MIN
* or greater than INTMAX_MAX)
*
* \param str The string to convert
* \param res [out] The converted value
*
* \returns -1 if it fails to convert, 0 on success
*/
int ast_str_to_imax(const char *str, intmax_t *res);
/*!
* \brief Convert the given string to an unsigned max size integer
*

51
main/conversions.c
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@ -41,6 +41,18 @@ static int str_is_negative(const char **str)
return **str == '-';
}
int ast_str_to_int(const char *str, int *res)
{
intmax_t val;
if (ast_str_to_imax(str, &val) || val < INT_MIN || val > INT_MAX) {
return -1;
}
*res = val;
return 0;
}
int ast_str_to_uint(const char *str, unsigned int *res)
{
uintmax_t val;
@ -53,6 +65,18 @@ int ast_str_to_uint(const char *str, unsigned int *res)
return 0;
}
int ast_str_to_long(const char *str, long *res)
{
intmax_t val;
if (ast_str_to_imax(str, &val) || val < LONG_MIN || val > LONG_MAX) {
return -1;
}
*res = val;
return 0;
}
int ast_str_to_ulong(const char *str, unsigned long *res)
{
uintmax_t val;
@ -65,6 +89,33 @@ int ast_str_to_ulong(const char *str, unsigned long *res)
return 0;
}
int ast_str_to_imax(const char *str, intmax_t *res)
{
char *end;
intmax_t val;
if (!str) {
return -1;
}
errno = 0;
val = strtoimax(str, &end, 0);
/*
* If str equals end then no digits were found. If end is not pointing to
* a null character then the string contained some numbers that could be
* converted, but some characters that could not, which we'll consider
* invalid.
*/
if (str == end || *end != '\0' || (errno == ERANGE &&
(val == INTMAX_MIN || val == INTMAX_MAX))) {
return -1;
}
*res = val;
return 0;
}
int ast_str_to_umax(const char *str, uintmax_t *res)
{
char *end;

153
tests/test_conversions.c
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@ -37,6 +37,54 @@
#define CATEGORY "/main/conversions/"
AST_TEST_DEFINE(str_to_int)
{
const char *invalid = "abc";
const char *invalid_partial = "7abc";
const char *negative = "-7";
const char *negative_spaces = " -7";
const char *negative_out_of_range = "-9999999999";
const char *out_of_range = "9999999999";
const char *spaces = " ";
const char *valid = "7";
const char *valid_spaces = " 7";
int val;
char str[64];
switch (cmd) {
case TEST_INIT:
info->name = __func__;
info->category = CATEGORY;
info->summary = "convert a string to a signed integer";
info->description = info->summary;
return AST_TEST_NOT_RUN;
case TEST_EXECUTE:
break;
}
ast_test_validate(test, ast_str_to_int(NULL, &val));
ast_test_validate(test, ast_str_to_int("\0", &val));
ast_test_validate(test, ast_str_to_int(invalid, &val));
ast_test_validate(test, ast_str_to_int(invalid_partial, &val));
ast_test_validate(test, !ast_str_to_int(negative, &val));
ast_test_validate(test, !ast_str_to_int(negative_spaces, &val));
ast_test_validate(test, ast_str_to_int(negative_out_of_range, &val));
ast_test_validate(test, ast_str_to_int(out_of_range, &val));
ast_test_validate(test, ast_str_to_int(spaces, &val));
ast_test_validate(test, !ast_str_to_int(valid, &val));
ast_test_validate(test, !ast_str_to_int(valid_spaces, &val));
ast_test_validate(test, snprintf(str, sizeof(str), "%d", INT_MAX) > 0);
ast_test_validate(test, !ast_str_to_int(str, &val));
ast_test_validate(test, val == INT_MAX);
ast_test_validate(test, snprintf(str, sizeof(str), "%d", INT_MIN) > 0);
ast_test_validate(test, !ast_str_to_int(str, &val));
ast_test_validate(test, val == INT_MIN);
return AST_TEST_PASS;
}
AST_TEST_DEFINE(str_to_uint)
{
const char *invalid = "abc";
@ -79,6 +127,54 @@ AST_TEST_DEFINE(str_to_uint)
return AST_TEST_PASS;
}
AST_TEST_DEFINE(str_to_long)
{
const char *invalid = "abc";
const char *invalid_partial = "7abc";
const char *negative = "-7";
const char *negative_spaces = " -7";
const char *negative_out_of_range = "-99999999999999999999";
const char *out_of_range = "99999999999999999999";
const char *spaces = " ";
const char *valid = "7";
const char *valid_spaces = " 7";
long val;
char str[64];
switch (cmd) {
case TEST_INIT:
info->name = __func__;
info->category = CATEGORY;
info->summary = "convert a string to a signed long";
info->description = info->summary;
return AST_TEST_NOT_RUN;
case TEST_EXECUTE:
break;
}
ast_test_validate(test, ast_str_to_long(NULL, &val));
ast_test_validate(test, ast_str_to_long("\0", &val));
ast_test_validate(test, ast_str_to_long(invalid, &val));
ast_test_validate(test, ast_str_to_long(invalid_partial, &val));
ast_test_validate(test, !ast_str_to_long(negative, &val));
ast_test_validate(test, !ast_str_to_long(negative_spaces, &val));
ast_test_validate(test, ast_str_to_long(negative_out_of_range, &val));
ast_test_validate(test, ast_str_to_long(out_of_range, &val));
ast_test_validate(test, ast_str_to_long(spaces, &val));
ast_test_validate(test, !ast_str_to_long(valid, &val));
ast_test_validate(test, !ast_str_to_long(valid_spaces, &val));
ast_test_validate(test, snprintf(str, sizeof(str), "%ld", LONG_MAX) > 0);
ast_test_validate(test, !ast_str_to_long(str, &val));
ast_test_validate(test, val == LONG_MAX);
ast_test_validate(test, snprintf(str, sizeof(str), "%ld", LONG_MIN) > 0);
ast_test_validate(test, !ast_str_to_long(str, &val));
ast_test_validate(test, val == LONG_MIN);
return AST_TEST_PASS;
}
AST_TEST_DEFINE(str_to_ulong)
{
const char *invalid = "abc";
@ -121,6 +217,55 @@ AST_TEST_DEFINE(str_to_ulong)
return AST_TEST_PASS;
}
AST_TEST_DEFINE(str_to_imax)
{
const char *invalid = "abc";
const char *invalid_partial = "7abc";
const char *negative = "-7";
const char *negative_spaces = " -7";
const char *negative_out_of_range = "-99999999999999999999999999999999999999999999999999";
const char *out_of_range = "99999999999999999999999999999999999999999999999999";
const char *spaces = " ";
const char *valid = "7";
const char *valid_spaces = " 7";
intmax_t val;
char str[64];
switch (cmd) {
case TEST_INIT:
info->name = __func__;
info->category = CATEGORY;
info->summary = "convert a string to a signed max size integer";
info->description = info->summary;
return AST_TEST_NOT_RUN;
case TEST_EXECUTE:
break;
}
ast_test_validate(test, ast_str_to_imax(NULL, &val));
ast_test_validate(test, ast_str_to_imax("\0", &val));
ast_test_validate(test, ast_str_to_imax(invalid, &val));
ast_test_validate(test, ast_str_to_imax(invalid_partial, &val));
ast_test_validate(test, !ast_str_to_imax(negative, &val));
ast_test_validate(test, !ast_str_to_imax(negative_spaces, &val));
ast_test_validate(test, ast_str_to_imax(negative_out_of_range, &val));
ast_test_validate(test, ast_str_to_imax(out_of_range, &val));
ast_test_validate(test, ast_str_to_imax(spaces, &val));
ast_test_validate(test, !ast_str_to_imax(valid, &val));
ast_test_validate(test, !ast_str_to_imax(valid_spaces, &val));
ast_test_validate(test, snprintf(str, sizeof(str), "%jd", INTMAX_MAX) > 0);
ast_test_validate(test, !ast_str_to_imax(str, &val));
ast_test_validate(test, val == INTMAX_MAX);
ast_test_validate(test, snprintf(str, sizeof(str), "%jd", INTMAX_MIN) > 0);
ast_test_validate(test, !ast_str_to_imax(str, &val));
ast_test_validate(test, val == INTMAX_MIN);
return AST_TEST_PASS;
}
AST_TEST_DEFINE(str_to_umax)
{
const char *invalid = "abc";
@ -156,7 +301,7 @@ AST_TEST_DEFINE(str_to_umax)
ast_test_validate(test, !ast_str_to_umax(valid, &val));
ast_test_validate(test, !ast_str_to_umax(valid_spaces, &val));
ast_test_validate(test, snprintf(str, sizeof(str), "%lu", UINTMAX_MAX) > 0);
ast_test_validate(test, snprintf(str, sizeof(str), "%ju", UINTMAX_MAX) > 0);
ast_test_validate(test, !ast_str_to_umax(str, &val));
ast_test_validate(test, val == UINTMAX_MAX);
@ -165,16 +310,22 @@ AST_TEST_DEFINE(str_to_umax)
static int load_module(void)
{
AST_TEST_REGISTER(str_to_int);
AST_TEST_REGISTER(str_to_uint);
AST_TEST_REGISTER(str_to_long);
AST_TEST_REGISTER(str_to_ulong);
AST_TEST_REGISTER(str_to_imax);
AST_TEST_REGISTER(str_to_umax);
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
AST_TEST_UNREGISTER(str_to_int);
AST_TEST_UNREGISTER(str_to_uint);
AST_TEST_UNREGISTER(str_to_long);
AST_TEST_UNREGISTER(str_to_ulong);
AST_TEST_UNREGISTER(str_to_imax);
AST_TEST_UNREGISTER(str_to_umax);
return 0;
}

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