66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
#include <stdarg.h>
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#include "rtthread.h"
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#include "beken_util.h"
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char * dynamic_form_data_append(char *old, const char *key, const char *value)
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{
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return dynamic_string_append(old, "%s%s=%s", (old)?"&":"", key, value);
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}
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char * dynamic_string_append(char *old, const char *fmt, ...)
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{
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uint32_t old_size, add_size;
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char *new;
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int n;
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va_list args;
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// get argc for estimate memory size.
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{
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new = (char *)fmt;
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add_size = strlen(fmt) + 2;
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do
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{
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new = strstr(new, "%");
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if(new)
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{
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add_size += 1024;
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new++;
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}
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}while(new);
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}
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old_size = (old) ? strlen(old) : 0;
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new = realloc(old, old_size + add_size);
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if(!new)
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{
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if(old)
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free(old);
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return new;
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}
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va_start(args, fmt);
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n = rt_vsnprintf(new + old_size, add_size - 1, fmt, args);
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va_end(args);
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// force end string.
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if(n > 0)
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{
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old = new + old_size + n;
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*old = '\0';
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new = realloc(new, old_size + n + 4);
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}
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return new;
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}
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void dynamic_string_free(void *ptr)
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{
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if(ptr)
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free(ptr);
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}
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