---
name: "streqvmap"
section: "3"
platform: "linux"
package: "autogen"
version: "5.18.16-6"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://carta.tech/man/streqvmap"
---

# streqvmap(3)

Set the character mappings for the streqv functions

## NAME

streqvmap - Set the character mappings for the streqv functions

## SYNOPSIS

\#include \<*your-opts.h*\>\
 cc \[...\] -o outfile infile.c -l**opts** \[...\]

void **streqvmap**(char *from*, char *to*, int *ct*);

## DESCRIPTION

Set the character mapping.  If the count (**ct**) is set to zero, then the map is cleared by setting all entries in the map to their index value.  Otherwise, the "**From**" character is mapped to the "**To**" character.  If **ct** is greater than 1, then **From** and **To** are incremented and the process repeated until **ct** entries have been set. For example,

```
    streqvmap('a', 'A', 26);
```

will alter the mapping so that all English lower case letters will map to upper case.

This function name is mapped to option\_streqvmap so as to not conflict with the POSIX name space.

- *from*

  Input character

- *to*

  Mapped-to character

- *ct*

  compare length

## ERRORS

none.

## SEE ALSO

The *info* documentation for the -l*opts* library.\
 [ao\_string\_tokenize(3)](/man/ao_string_tokenize/3.md), [configFileLoad(3)](/man/configFileLoad/3.md), [optionFileLoad(3)](/man/optionFileLoad/3.md), [optionFindNextValue(3)](/man/optionFindNextValue/3.md), [optionFindValue(3)](/man/optionFindValue/3.md), [optionFree(3)](/man/optionFree/3.md), [optionGetValue(3)](/man/optionGetValue/3.md), [optionLoadLine(3)](/man/optionLoadLine/3.md), [optionMemberList(3)](/man/optionMemberList/3.md), [optionNextValue(3)](/man/optionNextValue/3.md), [optionOnlyUsage(3)](/man/optionOnlyUsage/3.md), [optionPrintVersion(3)](/man/optionPrintVersion/3.md), [optionPrintVersionAndReturn(3)](/man/optionPrintVersionAndReturn/3.md), [optionProcess(3)](/man/optionProcess/3.md), [optionRestore(3)](/man/optionRestore/3.md), [optionSaveFile(3)](/man/optionSaveFile/3.md), [optionSaveState(3)](/man/optionSaveState/3.md), [optionUnloadNested(3)](/man/optionUnloadNested/3.md), [optionVersion(3)](/man/optionVersion/3.md), [strequate(3)](/man/strequate/3.md), [streqvcmp(3)](/man/streqvcmp/3.md), [strneqvcmp(3)](/man/strneqvcmp/3.md), [strtransform(3)](/man/strtransform/3.md),