conversion.h File Reference

String to number conversion utilities interface. More...

#include <stdint.h>

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Functions
int32_t	str_to_int (const char *s)
	Convert a string to a 32-bit signed integer.
float	str_to_float (const char *s)
	Convert a string to a floating-point number.

Detailed Description

String to number conversion utilities interface.

This header declares functions for converting string representations of numbers to their corresponding integer and floating-point values. The implementations handle:

• Leading/trailing whitespace
• Optional sign indicators (+/-)
• Decimal points for floating-point numbers
• Partial number parsing (stops at first invalid character)

Note

These functions do not handle scientific notation or hexadecimal formats

No overflow/underflow checking is performed

Author

Ashutosh Vishwakarma

Date

2025-07-23

Function Documentation

str_to_float()

float str_to_float

(

const char *

s

)

Convert a string to a floating-point number.

Parameters

s	Null-terminated string to convert (may contain leading whitespace)

Returns

Converted floating-point value

Warning

Limited precision for fractional components

Stops parsing at first non-digit/non-dot character

Convert a string to a floating-point number.

Parameters

[in]

s

Pointer to null-terminated input string

Returns

Converted floating-point value

Parses the input string to construct a float value:

1. Skips leading whitespace
2. Processes optional sign
3. Handles both integer and fractional parts
4. Properly tracks decimal point position
5. Stops at first invalid character

Warning

Limited precision for fractional components

No overflow/underflow protection

float val = str_to_float(" 3.1415xyz"); // Returns 3.1415f

str_to_int()

int32_t str_to_int

(

const char *

s

)

Convert a string to a 32-bit signed integer.

Parameters

s	Null-terminated string to convert (may contain leading whitespace)

Returns

Converted 32-bit integer value

Warning

Potential integer overflow with large numbers

Stops parsing at first non-digit character

Convert a string to a 32-bit signed integer.

Parameters

[in]

s

Pointer to null-terminated input string

Returns

Converted 32-bit integer value

Parses the input string character by character to construct the integer value:

1. Skips any leading whitespace (spaces/tabs)
2. Processes optional sign character (+/-)
3. Converts subsequent digit characters to integer value
4. Stops at first non-digit character

Warning

Potential for overflow with large numbers

No error reporting for invalid inputs

int val = str_to_int(" -1234abc"); // Returns -1234