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use constant pointers when possible

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It is a good practice to constify pointers when their dereferenced
data is not modified within the functions or its descendants.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7234 09075e82-0dd4-0310-85a5-a0d7c8717e4f
This commit is contained in:
Max Kellermann 2008-04-12 04:07:11 +00:00 committed by Eric Wong
parent 83e937320b
commit 623a86f389
3 changed files with 24 additions and 25 deletions
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14
src/listen.c
View File

@ -67,7 +67,7 @@ static void redirect_stdin(void)
FATAL("dup2 stdin: %s\n", strerror(errno));
}
static int establishListen(struct sockaddr *addrp, socklen_t addrlen)
static int establishListen(const struct sockaddr *addrp, socklen_t addrlen)
{
int pf;
int sock;
@ -121,7 +121,7 @@ static int establishListen(struct sockaddr *addrp, socklen_t addrlen)
static void parseListenConfigParam(unsigned int port, ConfigParam * param)
{
struct sockaddr *addrp;
const struct sockaddr *addrp;
socklen_t addrlen;
struct sockaddr_in sin4;
#ifdef HAVE_IPV6
@ -141,14 +141,14 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
#ifdef HAVE_IPV6
if (useIpv6) {
sin6.sin6_addr = in6addr_any;
addrp = (struct sockaddr *)&sin6;
addrp = (const struct sockaddr *)&sin6;
addrlen = sizeof(struct sockaddr_in6);
if (establishListen(addrp, addrlen) < 0)
BINDERROR();
}
#endif
sin4.sin_addr.s_addr = INADDR_ANY;
addrp = (struct sockaddr *)&sin4;
addrp = (const struct sockaddr *)&sin4;
addrlen = sizeof(struct sockaddr_in);
#ifdef HAVE_IPV6
if ((establishListen(addrp, addrlen) < 0) && !useIpv6) {
@ -173,14 +173,14 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
param->value, param->line);
}
memcpy((char *)&sin6.sin6_addr.s6_addr,
(char *)he->h_addr, he->h_length);
addrp = (struct sockaddr *)&sin6;
(const char *)he->h_addr, he->h_length);
addrp = (const struct sockaddr *)&sin6;
addrlen = sizeof(struct sockaddr_in6);
break;
#endif
case AF_INET:
memcpy((char *)&sin4.sin_addr.s_addr,
(char *)he->h_addr, he->h_length);
(const char *)he->h_addr, he->h_length);
addrp = (struct sockaddr *)&sin4;
addrlen = sizeof(struct sockaddr_in);
break;

25
src/pcm_utils.c
View File

@ -74,15 +74,15 @@ void pcm_volumeChange(char *buffer, int bufferSize, AudioFormat * format,
}
}
static void pcm_add(char *buffer1, char *buffer2, size_t bufferSize1,
static void pcm_add(char *buffer1, const char *buffer2, size_t bufferSize1,
size_t bufferSize2, int vol1, int vol2,
AudioFormat * format)
const AudioFormat * format)
{
mpd_sint32 temp32;
mpd_sint8 *buffer8_1 = (mpd_sint8 *) buffer1;
mpd_sint8 *buffer8_2 = (mpd_sint8 *) buffer2;
const mpd_sint8 *buffer8_2 = (const mpd_sint8 *) buffer2;
mpd_sint16 *buffer16_1 = (mpd_sint16 *) buffer1;
mpd_sint16 *buffer16_2 = (mpd_sint16 *) buffer2;
const mpd_sint16 *buffer16_2 = (const mpd_sint16 *) buffer2;
switch (format->bits) {
case 16:
@ -129,8 +129,8 @@ static void pcm_add(char *buffer1, char *buffer2, size_t bufferSize1,
}
}
void pcm_mix(char *buffer1, char *buffer2, size_t bufferSize1,
size_t bufferSize2, AudioFormat * format, float portion1)
void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1,
size_t bufferSize2, const AudioFormat * format, float portion1)
{
int vol1;
float s = sin(M_PI_2 * portion1);
@ -351,8 +351,8 @@ static char *pcm_convertChannels(mpd_sint8 channels, char *inBuffer,
return outBuffer;
}
static char *pcm_convertTo16bit(mpd_sint8 bits, char *inBuffer, size_t inSize,
size_t *outSize)
static char *pcm_convertTo16bit(mpd_sint8 bits, const char *inBuffer,
size_t inSize, size_t *outSize)
{
static char *buf;
static size_t len;
@ -378,8 +378,7 @@ static char *pcm_convertTo16bit(mpd_sint8 bits, char *inBuffer, size_t inSize,
break;
case 16:
*outSize = inSize;
outBuffer = inBuffer;
break;
return inBuffer;
case 24:
/* put dithering code from mp3_decode here */
default:
@ -390,7 +389,7 @@ static char *pcm_convertTo16bit(mpd_sint8 bits, char *inBuffer, size_t inSize,
}
/* outFormat bits must be 16 and channels must be 1 or 2! */
size_t pcm_convertAudioFormat(AudioFormat * inFormat, char *inBuffer,
size_t pcm_convertAudioFormat(AudioFormat * inFormat, const char *inBuffer,
size_t inSize, AudioFormat * outFormat,
char *outBuffer, ConvState *convState)
{
@ -427,8 +426,8 @@ size_t pcm_convertAudioFormat(AudioFormat * inFormat, char *inBuffer,
return len;
}
size_t pcm_sizeOfConvBuffer(AudioFormat * inFormat, size_t inSize,
AudioFormat * outFormat)
size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize,
const AudioFormat * outFormat)
{
const double ratio = (double)outFormat->sampleRate /
(double)inFormat->sampleRate;

10
src/pcm_utils.h
View File

@ -45,13 +45,13 @@ typedef struct _ConvState {
void pcm_volumeChange(char *buffer, int bufferSize, AudioFormat * format,
int volume);
void pcm_mix(char *buffer1, char *buffer2, size_t bufferSize1,
size_t bufferSize2, AudioFormat * format, float portion1);
void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1,
size_t bufferSize2, const AudioFormat * format, float portion1);
size_t pcm_convertAudioFormat(AudioFormat * inFormat, char *inBuffer,
size_t pcm_convertAudioFormat(AudioFormat * inFormat, const char *inBuffer,
size_t inSize, AudioFormat * outFormat,
char *outBuffer, ConvState *convState);
size_t pcm_sizeOfConvBuffer(AudioFormat * inFormat, size_t inSize,
AudioFormat * outFormat);
size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize,
const AudioFormat * outFormat);
#endif