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Make mg_random() weak, see #1269

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cpq 2021-04-29 09:09:21 +01:00
parent 7061b7202f
commit 31c9e3fb7e
3 changed files with 33 additions and 28 deletions
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5
docs/README.md
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@ -1021,6 +1021,11 @@ int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts);
Initialise TLS on a given connection.
IMPORTANT: mbedTLS implementation uses `mg_random` as RNG. The `mg_random`
is defined as weak, therefore it is possible to override Mongoose's `mg_random`
with a custom implementation. Just create your own `mg_random` function:
`void mg_random(void *buf, size_t len)`.
## Timers

28
mongoose.h
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@ -477,11 +477,24 @@ void mg_timer_poll(unsigned long uptime_ms);
// WEAK symbol makes it possible to define a "default" function implementation,
// which could be overridden by the user who can define a function with the
// same name without linking conflict
#if !defined(WEAK)
#if (defined(__GNUC__) || defined(__clang__) || \
defined(__TI_COMPILER_VERSION__)) && \
!defined(_WIN32) && !defined(__CYGWIN__)
#define WEAK __attribute__((weak))
#else
#define WEAK
#endif
#endif
char *mg_file_read(const char *path, size_t *size);
int64_t mg_file_size(const char *path);
bool mg_file_write(const char *path, const void *buf, size_t len);
bool mg_file_printf(const char *path, const char *fmt, ...);
void mg_random(void *buf, size_t len);
void mg_random(void *buf, size_t len) WEAK;
bool mg_globmatch(const char *pattern, int plen, const char *s, int n);
bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v);
uint16_t mg_ntohs(uint16_t net);
@ -511,19 +524,6 @@ FILE *mg_fopen(const char *fp, const char *mode);
#define mg_htons(x) mg_ntohs(x)
#define mg_htonl(x) mg_ntohl(x)
// WEAK symbol makes it possible to define a "default" function implementation,
// which could be overridden by the user who can define a function with the
// same name without linking conflict
#if !defined(WEAK)
#if (defined(__GNUC__) || defined(__clang__) || \
defined(__TI_COMPILER_VERSION__)) && \
!defined(_WIN32) && !defined(__CYGWIN__)
#define WEAK __attribute__((weak))
#else
#define WEAK
#endif
#endif
// Expands to a string representation of its argument: e.g.
// MG_STRINGIFY_LITERAL(5) expands to "5"
#if !defined(_MSC_VER) || _MSC_VER >= 1900

28
src/util.h
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@ -3,11 +3,24 @@
#include "arch.h"
#include "str.h"
// WEAK symbol makes it possible to define a "default" function implementation,
// which could be overridden by the user who can define a function with the
// same name without linking conflict
#if !defined(WEAK)
#if (defined(__GNUC__) || defined(__clang__) || \
defined(__TI_COMPILER_VERSION__)) && \
!defined(_WIN32) && !defined(__CYGWIN__)
#define WEAK __attribute__((weak))
#else
#define WEAK
#endif
#endif
char *mg_file_read(const char *path, size_t *size);
int64_t mg_file_size(const char *path);
bool mg_file_write(const char *path, const void *buf, size_t len);
bool mg_file_printf(const char *path, const char *fmt, ...);
void mg_random(void *buf, size_t len);
void mg_random(void *buf, size_t len) WEAK;
bool mg_globmatch(const char *pattern, int plen, const char *s, int n);
bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v);
uint16_t mg_ntohs(uint16_t net);
@ -37,19 +50,6 @@ FILE *mg_fopen(const char *fp, const char *mode);
#define mg_htons(x) mg_ntohs(x)
#define mg_htonl(x) mg_ntohl(x)
// WEAK symbol makes it possible to define a "default" function implementation,
// which could be overridden by the user who can define a function with the
// same name without linking conflict
#if !defined(WEAK)
#if (defined(__GNUC__) || defined(__clang__) || \
defined(__TI_COMPILER_VERSION__)) && \
!defined(_WIN32) && !defined(__CYGWIN__)
#define WEAK __attribute__((weak))
#else
#define WEAK
#endif
#endif
// Expands to a string representation of its argument: e.g.
// MG_STRINGIFY_LITERAL(5) expands to "5"
#if !defined(_MSC_VER) || _MSC_VER >= 1900