mirror of
https://github.com/pocketpy/pocketpy
synced 2025-10-20 19:40:18 +00:00
94 lines
2.1 KiB
Markdown
94 lines
2.1 KiB
Markdown
---
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title: Stack Manipulation
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icon: dot
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order: 8
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---
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!!!
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Stack index is 0-based instead of 1-based.
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!!!
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## Push and Pop
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#### `bool pkpy_pop(pkpy_vm*, int n)`
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Pop `n` items from the stack.
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#### `bool pkpy_push_function(pkpy_vm*, pkpy_function, int argc)`
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Push a function onto the stack. The function is of `typedef int (*pkpy_function)(pkpy_vm*);`
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#### `bool pkpy_push_int(pkpy_vm*, int)`
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Push an integer onto the stack.
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#### `bool pkpy_push_float(pkpy_vm*, double)`
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Push a float onto the stack.
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#### `bool pkpy_push_bool(pkpy_vm*, bool)`
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Push a boolean onto the stack.
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#### `bool pkpy_push_string(pkpy_vm*, const char*)`
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Push a string onto the stack.
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#### `bool pkpy_push_stringn(pkpy_vm*, const char*, int length)`
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Push a string onto the stack.
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+ `length`: the length of the string
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#### `bool pkpy_push_voidp(pkpy_vm*, void*)`
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Push a void pointer onto the stack.
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#### `bool pkpy_push_none(pkpy_vm*)`
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Push `None` onto the stack.
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## Size Queries
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#### `bool pkpy_check_stack(pkpy_vm*, int free)`
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Return true if at least `free` empty slots remain on the stack.
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#### `int pkpy_stack_size(pkpy_vm*)`
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Return the number of elements on the stack.
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## Conversion
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#### `bool pkpy_to_int(pkpy_vm*, int index, int* ret)`
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Convert the value at the given index to an integer.
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#### `bool pkpy_to_float(pkpy_vm*, int index, double* ret)`
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Convert the value at the given index to a float.
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#### `bool pkpy_to_bool(pkpy_vm*, int index, bool* ret)`
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Convert the value at the given index to a boolean.
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#### `bool pkpy_to_voidp(pkpy_vm*, int index, void** ret)`
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Convert the value at the given index to a void pointer.
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#### `bool pkpy_to_string(pkpy_vm*, int index, char** ret)`
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Convert the value at the given index to a string (strong reference).
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+ `ret` is null terminated.
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+ You are responsible for freeing the string when you are done with it.
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#### `bool pkpy_to_stringn(pkpy_vm*, int index, const char** ret, int* size)`
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Convert the value at the given index to a string (weak reference).
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+ `ret` is not null terminated.
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+ `size` is the length of the string.
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+ The string is only valid until the next API call.
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