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Eliminate malloc and free dependencies, recently introduced

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This commit is contained in:
Nigel Stewart 2016-01-07 21:28:01 +10:00
parent b1c272b93a
commit d96c978748
2 changed files with 33 additions and 38 deletions
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23
auto/src/glew_head.c
View File

@ -10,7 +10,7 @@
#endif
#include <stddef.h> /* For size_t */
#include <stdlib.h> /* For malloc, free */
#include <stdlib.h> /* For bsearch */
#include <string.h> /* For memset */
#if defined(GLEW_REGAL)
@ -166,23 +166,16 @@ static GLuint _glewStrCLen (const GLubyte* s, GLubyte c)
GLuint i=0;
if (s == NULL) return 0;
while (s[i] != '\0' && s[i] != c) i++;
return (s[i] == '\0' || s[i] == c) ? i : 0;
return i;
}
static GLubyte *_glewStrDup (const GLubyte *s)
static GLuint _glewStrCopy(char *d, const char *s, char c)
{
int n = _glewStrLen(s);
GLubyte *dup = malloc(n+1);
if (dup)
{
GLubyte *i = dup;
for (;;)
{
*i = *s;
if (*i) { ++i; ++s; } else break;
}
}
return dup;
GLuint i=0;
if (s == NULL) return 0;
while (s[i] != '\0' && s[i] != c) { d[i] = s[i]; i++; }
d[i] = '\0';
return i;
}
#if !defined(__APPLE__) || defined(GLEW_APPLE_GLX)

38
auto/src/glew_init_gl.c
View File

@ -33,17 +33,17 @@ static GLboolean *_glewGetExtensionEnable(const char *name)
return NULL;
}
static char *_glewNextSpace(char *i)
static const char *_glewNextSpace(const char *i)
{
char *j = i;
const char *j = i;
if (j)
while (*j!=' ' && *j) ++j;
return j;
}
static char *_glewNextNonSpace(char *i)
static const char *_glewNextNonSpace(const char *i)
{
char *j = i;
const char *j = i;
if (j)
while (*j==' ') ++j;
return j;
@ -137,35 +137,37 @@ static GLenum GLEWAPIENTRY glewContextInit ()
}
else
{
const GLubyte *ext;
char *begin;
char *end;
char *i;
char *j;
const char *extensions;
const char *end;
const char *i;
const char *j;
char ext[128];
GLboolean *enable;
ext = glGetString(GL_EXTENSIONS);
extensions = (const char *) glGetString(GL_EXTENSIONS);
if (ext)
if (extensions)
{
begin = (char *) _glewStrDup(ext);
end = begin + _glewStrLen((GLubyte *) begin);
for (i=begin; i<end; i = j + 1)
end = extensions + _glewStrLen((const GLubyte *) extensions);
for (i=extensions; i<end; i = j + 1)
{
i = _glewNextNonSpace(i);
j = _glewNextSpace(i);
*j = 0;
/* Copy extension into NUL terminated string */
if (j-i >= (ptrdiff_t) sizeof(ext))
continue;
_glewStrCopy(ext, i, ' ');
/* Based on extension string(s), glewGetExtension purposes */
enable = _glewGetExtensionString(i);
enable = _glewGetExtensionString(ext);
if (enable)
*enable = GL_TRUE;
/* Based on extension string(s), experimental mode, glewIsSupported purposes */
enable = _glewGetExtensionEnable(i);
enable = _glewGetExtensionEnable(ext);
if (enable)
*enable = GL_TRUE;
}
free(begin);
}
}