This file is indexed.

/usr/i686-w64-mingw32/include/nsis/pluginapi.h is in nsis-pluginapi 2.51-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#ifndef ___NSIS_PLUGIN__H___
#define ___NSIS_PLUGIN__H___

#ifdef __cplusplus
extern "C" {
#endif

#include "api.h"

#ifndef NSISCALL
#  define NSISCALL __stdcall
#endif

#define EXDLL_INIT()           {  \
        g_stringsize=string_size; \
        g_stacktop=stacktop;      \
        g_variables=variables; }

typedef struct _stack_t {
  struct _stack_t *next;
  char text[1]; // this should be the length of string_size
} stack_t;

enum
{
INST_0,         // $0
INST_1,         // $1
INST_2,         // $2
INST_3,         // $3
INST_4,         // $4
INST_5,         // $5
INST_6,         // $6
INST_7,         // $7
INST_8,         // $8
INST_9,         // $9
INST_R0,        // $R0
INST_R1,        // $R1
INST_R2,        // $R2
INST_R3,        // $R3
INST_R4,        // $R4
INST_R5,        // $R5
INST_R6,        // $R6
INST_R7,        // $R7
INST_R8,        // $R8
INST_R9,        // $R9
INST_CMDLINE,   // $CMDLINE
INST_INSTDIR,   // $INSTDIR
INST_OUTDIR,    // $OUTDIR
INST_EXEDIR,    // $EXEDIR
INST_LANG,      // $LANGUAGE
__INST_LAST
};

extern unsigned int g_stringsize;
extern stack_t **g_stacktop;
extern char *g_variables;

int NSISCALL popstring(char *str); // 0 on success, 1 on empty stack
int NSISCALL popstringn(char *str, int maxlen); // with length limit, pass 0 for g_stringsize
int NSISCALL popint(); // pops an integer
int NSISCALL popint_or(); // with support for or'ing (2|4|8)
int NSISCALL myatoi(const char *s); // converts a string to an integer
unsigned NSISCALL myatou(const char *s); // converts a string to an unsigned integer, decimal only
int NSISCALL myatoi_or(const char *s); // with support for or'ing (2|4|8)
void NSISCALL pushstring(const char *str);
void NSISCALL pushint(int value);
char * NSISCALL getuservariable(const int varnum);
void NSISCALL setuservariable(const int varnum, const char *var);

#ifdef __cplusplus
}
#endif

#endif//!___NSIS_PLUGIN__H___